Fix a bug in the output of para_audioc.
[paraslash.git] / aft.c
diff --git a/aft.c b/aft.c
index 0e3f83e..6b74b0a 100644 (file)
--- a/aft.c
+++ b/aft.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2007-2008 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2007-2009 Andre Noll <maan@systemlinux.org>
  *
  * Licensed under the GPL v2. For licencing details see COPYING.
  */
@@ -7,19 +7,28 @@
 /** \file aft.c Audio file table functions. */
 
 #include <dirent.h> /* readdir() */
+#include <openssl/rc4.h>
+
+#include <osl.h>
 #include "para.h"
 #include "error.h"
+#include "crypt.h"
 #include "string.h"
 #include <sys/mman.h>
 #include <fnmatch.h>
+#include <sys/shm.h>
+
 #include "afh.h"
 #include "afs.h"
 #include "net.h"
 #include "vss.h"
 #include "fd.h"
 #include "ipc.h"
+#include "portable_io.h"
 
 static struct osl_table *audio_file_table;
+static char *status_items;
+static char *parser_friendly_status_items;
 
 /** The different sorting methods of the ls command. */
 enum ls_sorting_method {
@@ -58,7 +67,11 @@ enum ls_listing_mode {
        /** -lv */
        LS_MODE_VERBOSE,
        /** -lm */
-       LS_MODE_MBOX
+       LS_MODE_MBOX,
+       /** -lc */
+       LS_MODE_CHUNKS,
+       /** -lp */
+       LS_MODE_PARSER,
 };
 
 /** The flags accepted by the ls command. */
@@ -69,6 +82,8 @@ enum ls_flags {
        LS_FLAG_ADMISSIBLE_ONLY = 2,
        /** -r */
        LS_FLAG_REVERSE = 4,
+       /** -d */
+       LS_FLAG_UNIXDATE = 8,
 };
 
 /**
@@ -94,6 +109,8 @@ struct ls_widths {
        unsigned short duration_width;
        /** size of the num played field. */
        unsigned short num_played_width;
+       /** size of the amp field. */
+       unsigned short amp_width;
 };
 
 /** Data passed from the ls command handler to its callback function. */
@@ -138,8 +155,10 @@ enum afsi_offsets {
        AFSI_LYRICS_ID_OFFSET = 24,
        /** Storage position of the .audio_format_id field. */
        AFSI_AUDIO_FORMAT_ID_OFFSET = 28,
-       /** 3 bytes reserved space for future usage. */
-       AFSI_AUDIO_FORMAT_UNUSED_OFFSET = 29,
+       /** Storage position of the amplification field. */
+       AFSI_AMP_OFFSET = 29,
+       /** 2 bytes reserved space for future usage. */
+       AFSI_AUDIO_FORMAT_UNUSED_OFFSET = 30,
        /** On-disk storage space needed. */
        AFSI_SIZE = 32
 };
@@ -163,7 +182,8 @@ void save_afsi(struct afs_info *afsi, struct osl_object *obj)
        write_u32(buf + AFSI_LYRICS_ID_OFFSET, afsi->lyrics_id);
        write_u8(buf + AFSI_AUDIO_FORMAT_ID_OFFSET,
                afsi->audio_format_id);
-       memset(buf + AFSI_AUDIO_FORMAT_UNUSED_OFFSET, 0, 3);
+       write_u8(buf + AFSI_AMP_OFFSET, afsi->amp);
+       memset(buf + AFSI_AUDIO_FORMAT_UNUSED_OFFSET, 0, 2);
 }
 
 /**
@@ -188,6 +208,7 @@ int load_afsi(struct afs_info *afsi, struct osl_object *obj)
        afsi->lyrics_id = read_u32(buf + AFSI_LYRICS_ID_OFFSET);
        afsi->audio_format_id = read_u8(buf +
                AFSI_AUDIO_FORMAT_ID_OFFSET);
+       afsi->amp = read_u8(buf + AFSI_AMP_OFFSET);
        return 1;
 }
 
@@ -207,12 +228,27 @@ enum audio_file_table_columns {
        NUM_AFT_COLUMNS
 };
 
+/**
+ * Compare two osl objects pointing to hash values.
+ *
+ * \param obj1 Pointer to the first hash object.
+ * \param obj2 Pointer to the second hash object.
+ *
+ * \return The values required for an osl compare function.
+ *
+ * \sa osl_compare_func, uint32_compare().
+ */
+int aft_hash_compare(const struct osl_object *obj1, const struct osl_object *obj2)
+{
+       return hash_compare((HASH_TYPE *)obj1->data, (HASH_TYPE *)obj2->data);
+}
+
 static struct osl_column_description aft_cols[] = {
        [AFTCOL_HASH] = {
                .storage_type = OSL_MAPPED_STORAGE,
                .storage_flags = OSL_RBTREE | OSL_FIXED_SIZE | OSL_UNIQUE,
                .name = "hash",
-               .compare_function = osl_hash_compare,
+               .compare_function = aft_hash_compare,
                .data_size = HASH_SIZE
        },
        [AFTCOL_PATH] = {
@@ -325,23 +361,29 @@ enum afhi_offsets {
        CHUNK_TV_TV_USEC_OFFSET = 36,
        /** Number of channels is stored here. (1 byte) */
        AFHI_CHANNELS_OFFSET = 40,
-       /** EOF timeout in ms. (2 byte) */
-       AFHI_EOF_OFFSET = 41,
        /** The tag info position. */
-       AFHI_INFO_STRING_OFFSET = 43,
+       AFHI_INFO_STRING_OFFSET = 41,
        /** Minimal on-disk size of a valid afhi struct. */
-       MIN_AFHI_SIZE = 44
+       MIN_AFHI_SIZE = 47, /* at least 6 null bytes for techinfo/tags */
 };
 
 static unsigned sizeof_afhi_buf(const struct afh_info *afhi)
 {
        if (!afhi)
                return 0;
-       return strlen(afhi->info_string) + MIN_AFHI_SIZE;
+       return MIN_AFHI_SIZE
+               + strlen(afhi->techinfo)
+               + strlen(afhi->tags.artist)
+               + strlen(afhi->tags.title)
+               + strlen(afhi->tags.year)
+               + strlen(afhi->tags.album)
+               + strlen(afhi->tags.comment);
 }
 
 static void save_afhi(struct afh_info *afhi, char *buf)
 {
+       char *p;
+
        if (!afhi)
                return;
        write_u32(buf + AFHI_SECONDS_TOTAL_OFFSET, afhi->seconds_total);
@@ -355,8 +397,14 @@ static void save_afhi(struct afh_info *afhi, char *buf)
        write_u32(buf + HEADER_OFFSET_OFFSET, afhi->header_offset);
        write_u32(buf + CHUNK_TV_TV_SEC_OFFSET, afhi->chunk_tv.tv_sec);
        write_u32(buf + CHUNK_TV_TV_USEC_OFFSET, afhi->chunk_tv.tv_usec);
-       write_u16(buf + AFHI_EOF_OFFSET, tv2ms(&afhi->eof_tv));
-       strcpy(buf + AFHI_INFO_STRING_OFFSET, afhi->info_string); /* OK */
+       p = buf + AFHI_INFO_STRING_OFFSET;
+       /* The sprintf's below are OK as our caller made sure that buf is large enough */
+       p += sprintf(p, "%s", afhi->techinfo) + 1;
+       p += sprintf(p, "%s", afhi->tags.artist) + 1;
+       p += sprintf(p, "%s", afhi->tags.title) + 1;
+       p += sprintf(p, "%s", afhi->tags.year) + 1;
+       p += sprintf(p, "%s", afhi->tags.album) + 1;
+       sprintf(p, "%s", afhi->tags.comment);
 }
 
 static void load_afhi(const char *buf, struct afh_info *afhi)
@@ -372,8 +420,12 @@ static void load_afhi(const char *buf, struct afh_info *afhi)
        afhi->header_offset = read_u32(buf + HEADER_OFFSET_OFFSET);
        afhi->chunk_tv.tv_sec = read_u32(buf + CHUNK_TV_TV_SEC_OFFSET);
        afhi->chunk_tv.tv_usec = read_u32(buf + CHUNK_TV_TV_USEC_OFFSET);
-       ms2tv(read_u16(buf + AFHI_EOF_OFFSET), &afhi->eof_tv);
-       strcpy(afhi->info_string, buf + AFHI_INFO_STRING_OFFSET);
+       afhi->techinfo = (char *)buf + AFHI_INFO_STRING_OFFSET;
+       afhi->tags.artist = afhi->techinfo + strlen(afhi->techinfo) + 1;
+       afhi->tags.title = afhi->tags.artist + strlen(afhi->tags.artist) + 1;
+       afhi->tags.year = afhi->tags.title + strlen(afhi->tags.title) + 1;
+       afhi->tags.album = afhi->tags.year + strlen(afhi->tags.year) + 1;
+       afhi->tags.comment = afhi->tags.album + strlen(afhi->tags.album) + 1;
 }
 
 static unsigned sizeof_chunk_table(struct afh_info *afhi)
@@ -406,27 +458,27 @@ static void load_chunk_table(struct afh_info *afhi, char *buf)
  * \param path The full path of the audio file.
  * \param row Result pointer.
  *
- * \return The return value of the underlying call to osl_get_row().
+ * \return Standard.
  */
 int aft_get_row_of_path(const char *path, struct osl_row **row)
 {
        struct osl_object obj = {.data = (char *)path, .size = strlen(path) + 1};
 
-       return osl_get_row(audio_file_table, AFTCOL_PATH, &obj, row);
+       return osl(osl_get_row(audio_file_table, AFTCOL_PATH, &obj, row));
 }
 
 /**
  * Get the row of the audio file table corresponding to the given hash value.
  *
  * \param hash The hash value of the desired audio file.
- * \param row resul pointer.
+ * \param row Result pointer.
  *
- * \return The return value of the underlying call to osl_get_row().
+ * \return Standard.
  */
 int aft_get_row_of_hash(HASH_TYPE *hash, struct osl_row **row)
 {
        const struct osl_object obj = {.data = hash, .size = HASH_SIZE};
-       return osl_get_row(audio_file_table, AFTCOL_HASH, &obj, row);
+       return osl(osl_get_row(audio_file_table, AFTCOL_HASH, &obj, row));
 }
 
 /**
@@ -435,11 +487,11 @@ int aft_get_row_of_hash(HASH_TYPE *hash, struct osl_row **row)
  * \param row Pointer to a row in the audio file table.
  * \param obj Result pointer.
  *
- * \return The return value of the underlying call to osl_get_object().
+ * \return Standard.
  */
 int get_afsi_object_of_row(const struct osl_row *row, struct osl_object *obj)
 {
-       return osl_get_object(audio_file_table, row, AFTCOL_AFSI, obj);
+       return osl(osl_get_object(audio_file_table, row, AFTCOL_AFSI, obj));
 }
 
 /**
@@ -508,8 +560,8 @@ int get_afsi_of_path(const char *path, struct afs_info *afsi)
 int get_audio_file_path_of_row(const struct osl_row *row, char **path)
 {
        struct osl_object path_obj;
-       int ret = osl_get_object(audio_file_table, row, AFTCOL_PATH,
-               &path_obj);
+       int ret = osl(osl_get_object(audio_file_table, row, AFTCOL_PATH,
+               &path_obj));
        if (ret < 0)
                return ret;
        *path = path_obj.data;
@@ -526,9 +578,10 @@ int get_audio_file_path_of_row(const struct osl_row *row, char **path)
  *
  * \sa get_hash_of_row().
  */
-static int get_hash_object_of_aft_row(const struct osl_row *row, struct osl_object *obj)
+static int get_hash_object_of_aft_row(const struct osl_row *row,
+               struct osl_object *obj)
 {
-       return osl_get_object(audio_file_table, row, AFTCOL_HASH, obj);
+       return osl(osl_get_object(audio_file_table, row, AFTCOL_HASH, obj));
 }
 
 /**
@@ -566,8 +619,8 @@ static int get_hash_of_row(const struct osl_row *row, HASH_TYPE **hash)
 int get_afhi_of_row(const struct osl_row *row, struct afh_info *afhi)
 {
        struct osl_object obj;
-       int ret = osl_get_object(audio_file_table, row, AFTCOL_AFHI,
-               &obj);
+       int ret = osl(osl_get_object(audio_file_table, row, AFTCOL_AFHI,
+               &obj));
        if (ret < 0)
                return ret;
        load_afhi(obj.data, afhi);
@@ -578,8 +631,6 @@ int get_afhi_of_row(const struct osl_row *row, struct afh_info *afhi)
 static int save_afd(struct audio_file_data *afd)
 {
        size_t size = sizeof(*afd) + sizeof_chunk_table(&afd->afhi);
-
-       PARA_DEBUG_LOG("size: %zu\n", size);
        int shmid, ret = shm_new(size);
        void *shm_afd;
        char *buf;
@@ -618,92 +669,6 @@ int load_afd(int shmid, struct audio_file_data *afd)
        return 1;
 }
 
-/**
- * Mmap the given audio file and update statistics.
- *
- * \param aft_row Determines the audio file to be opened and updated.
- * \param score The score of the audio file.
- * \param afd Result pointer.
- *
- * On success, the numplayed field of the audio file selector info is increased
- * and the lastplayed time is set to the current time. Finally, the score of
- * the audio file is updated.
- *
- * \return Positive shmid on success, negative on errors.
- */
-int open_and_update_audio_file(struct osl_row *aft_row, long score,
-       struct audio_file_data *afd)
-{
-       HASH_TYPE *aft_hash, file_hash[HASH_SIZE];
-       struct osl_object afsi_obj;
-       struct afs_info old_afsi, new_afsi;
-       int ret = get_hash_of_row(aft_row, &aft_hash);
-       struct afsi_change_event_data aced;
-       struct osl_object map, chunk_table_obj;
-       char *path;
-
-       if (ret < 0)
-               return ret;
-       ret = get_audio_file_path_of_row(aft_row, &path);
-       if (ret < 0)
-               return ret;
-       ret = get_afsi_object_of_row(aft_row, &afsi_obj);
-       if (ret < 0)
-               return ret;
-       ret = load_afsi(&old_afsi, &afsi_obj);
-       if (ret < 0)
-               return ret;
-       ret = get_afhi_of_row(aft_row, &afd->afhi);
-       if (ret < 0)
-               return ret;
-       ret = osl_open_disk_object(audio_file_table, aft_row,
-               AFTCOL_CHUNKS, &chunk_table_obj);
-       if (ret < 0)
-               return ret;
-       afd->afhi.chunk_table = NULL;
-       ret = mmap_full_file(path, O_RDONLY, &map.data,
-               &map.size, &afd->fd);
-       if (ret < 0)
-               goto err;
-       hash_function(map.data, map.size, file_hash);
-       ret = hash_compare(file_hash, aft_hash);
-       para_munmap(map.data, map.size);
-       if (ret) {
-               ret = -E_HASH_MISMATCH;
-               goto err;
-       }
-       new_afsi = old_afsi;
-       new_afsi.num_played++;
-       new_afsi.last_played = time(NULL);
-       save_afsi(&new_afsi, &afsi_obj); /* in-place update */
-
-       load_chunk_table(&afd->afhi, chunk_table_obj.data);
-       {
-               struct ls_data d = {
-                       .afhi = afd->afhi,
-                       .afsi = old_afsi,
-                       .path = path,
-                       .score = score,
-                       .hash = file_hash
-               };
-               struct para_buffer pb = {.buf = NULL};
-               ret = make_status_items(&d, &pb);
-               if (ret < 0)
-                       goto err;
-               strncpy(afd->verbose_ls_output, pb.buf, VERBOSE_LS_OUTPUT_SIZE);
-               afd->verbose_ls_output[VERBOSE_LS_OUTPUT_SIZE - 1] = '\0';
-               free(pb.buf);
-       }
-       aced.aft_row = aft_row;
-       aced.old_afsi = &old_afsi;
-       afs_event(AFSI_CHANGE, NULL, &aced);
-       ret = save_afd(afd);
-err:
-       free(afd->afhi.chunk_table);
-       osl_close_disk_object(&chunk_table_obj);
-       return ret;
-}
-
 static int get_local_time(uint64_t *seconds, char *buf, size_t size,
        time_t current_time, enum ls_listing_mode lm)
 {
@@ -730,7 +695,7 @@ static int get_local_time(uint64_t *seconds, char *buf, size_t size,
 #define GET_NUM_DIGITS(x, num) { \
        typeof((x)) _tmp = PARA_ABS(x); \
        *num = 1; \
-       if ((x)) \
+       if ((_tmp)) \
                while ((_tmp) > 9) { \
                        (_tmp) /= 10; \
                        (*num)++; \
@@ -766,59 +731,113 @@ static void get_duration_buf(int seconds, char *buf, struct ls_options *opts)
        }
 }
 
-static char *make_attribute_lines(const char *att_bitmap, struct afs_info *afsi)
+
+static int write_attribute_items(struct para_buffer *b,
+               const char *att_bitmap, struct afs_info *afsi)
 {
-       char *att_text, *att_lines;
+       char *att_text;
+       int ret;
 
-       get_attribute_text(&afsi->attributes, " ", &att_text);
-       if (!att_text)
-               return para_strdup(att_bitmap);
-       att_lines = make_message("%s: %s\n%s: %s",
-               status_item_list[SI_ATTRIBUTES_BITMAP], att_bitmap,
-               status_item_list[SI_ATTRIBUTES_TXT], att_text);
+       ret = WRITE_STATUS_ITEM(b, SI_ATTRIBUTES_BITMAP, "%s\n", att_bitmap);
+       if (ret < 0)
+               return ret;
+       ret = get_attribute_text(&afsi->attributes, " ", &att_text);
+       if (ret < 0)
+               return ret;
+       ret = WRITE_STATUS_ITEM(b, SI_ATTRIBUTES_TXT, "%s\n", att_text);
        free(att_text);
-       return att_lines;
+       return ret;
 }
 
-static char *make_lyrics_lines(struct afs_info *afsi)
+static int write_lyrics_items(struct para_buffer *b, struct afs_info *afsi)
 {
        char *lyrics_name;
+       int ret;
 
+       ret = WRITE_STATUS_ITEM(b, SI_LYRICS_ID, "%u\n", afsi->lyrics_id);
+       if (ret < 0)
+               return ret;
        lyr_get_name_by_id(afsi->lyrics_id, &lyrics_name);
-       return make_message("%s: %u\n%s: %s\n",
-               status_item_list[SI_LYRICS_ID], afsi->lyrics_id,
-               status_item_list[SI_LYRICS_NAME], lyrics_name?
-                       lyrics_name : "(none)");
+       return WRITE_STATUS_ITEM(b, SI_LYRICS_NAME, "%s\n", lyrics_name?
+               lyrics_name : "(none)");
 }
 
-static char *make_image_lines(struct afs_info *afsi)
+static int write_image_items(struct para_buffer *b, struct afs_info *afsi)
 {
        char *image_name;
+       int ret;
+
+       ret = WRITE_STATUS_ITEM(b, SI_IMAGE_ID, "%u\n", afsi->image_id);
+       if (ret < 0)
+               return ret;
        img_get_name_by_id(afsi->image_id, &image_name);
-       return make_message("%s: %u\n%s: %s\n",
-               status_item_list[SI_IMAGE_ID], afsi->image_id,
-               status_item_list[SI_IMAGE_NAME], image_name?
-                       image_name : "(none)");
+       return WRITE_STATUS_ITEM(b, SI_IMAGE_NAME, "%s\n", image_name?
+               image_name : "(none)");
 }
 
-static char *make_filename_lines(const char *path, unsigned flags)
+static int write_filename_items(struct para_buffer *b, const char *path,
+               unsigned flags)
 {
-       char *dirname, *ret;
-       const char *basename;
+       char *val;
+       int ret;
 
        if (!(flags & LS_FLAG_FULL_PATH))
-               return make_message("%s: %s\n",
-                       status_item_list[SI_BASENAME], path);
-       basename = para_basename(path),
-       dirname = para_dirname(path);
-       ret = make_message("%s: %s\n%s: %s\n%s: %s\n",
-               status_item_list[SI_PATH], path,
-               status_item_list[SI_DIRECTORY], dirname? dirname : "?",
-               status_item_list[SI_BASENAME], basename? basename : "?");
-       free(dirname);
+               return WRITE_STATUS_ITEM(b, SI_BASENAME, "%s\n", path);
+       ret = WRITE_STATUS_ITEM(b, SI_PATH, "%s\n", path);
+       if (ret < 0)
+               return ret;
+       val = para_basename(path);
+       ret = WRITE_STATUS_ITEM(b, SI_BASENAME, "%s\n", val? val : "");
+       if (ret < 0)
+               return ret;
+       val = para_dirname(path);
+       ret = WRITE_STATUS_ITEM(b, SI_DIRECTORY, "%s\n", val? val : "");
+       free(val);
        return ret;
 }
 
+static int print_chunk_table(struct ls_data *d, struct para_buffer *b)
+{
+       struct osl_object chunk_table_obj;
+       struct osl_row *aft_row;
+       int ret, i;
+       char *buf;
+
+       ret = aft_get_row_of_hash(d->hash, &aft_row);
+       if (ret < 0)
+               return ret;
+       ret = osl_open_disk_object(audio_file_table, aft_row,
+               AFTCOL_CHUNKS, &chunk_table_obj);
+       if (ret < 0)
+               return ret;
+       ret = para_printf(b, "%s\n"
+               "chunk_time: %lu:%lu\nchunk_offsets: ",
+               d->path,
+               (long unsigned) d->afhi.chunk_tv.tv_sec,
+               (long unsigned) d->afhi.chunk_tv.tv_usec
+       );
+       if (ret < 0)
+               goto out;
+       buf = chunk_table_obj.data;
+       for (i = 0; i <= d->afhi.chunks_total; i++) {
+               ret = para_printf(b, "%u ", (unsigned) read_u32(buf + 4 * i));
+               if (ret < 0)
+                       goto out;
+       }
+       ret = para_printf(b, "\n");
+out:
+       osl_close_disk_object(&chunk_table_obj);
+       return ret;
+}
+
+static int write_score(struct para_buffer *b, struct ls_data *d,
+               struct ls_options *opts)
+{
+       if (!(opts->flags & LS_FLAG_ADMISSIBLE_ONLY)) /* no score*/
+               return 0;
+       return WRITE_STATUS_ITEM(b, SI_SCORE, "%li\n", d->score);
+}
+
 static int print_list_item(struct ls_data *d, struct ls_options *opts,
        struct para_buffer *b, time_t current_time)
 {
@@ -826,35 +845,40 @@ static int print_list_item(struct ls_data *d, struct ls_options *opts,
        char att_buf[65];
        char last_played_time[30];
        char duration_buf[30]; /* nobody has an audio file long enough to overflow this */
-       char score_buf[30] = "";
        struct afs_info *afsi = &d->afsi;
        struct afh_info *afhi = &d->afhi;
-       struct ls_widths *w = &opts->widths;
-       int have_score = opts->flags & LS_FLAG_ADMISSIBLE_ONLY;
        char asc_hash[2 * HASH_SIZE + 1];
-       char *att_lines, *lyrics_lines, *image_lines, *filename_lines;
 
        if (opts->mode == LS_MODE_SHORT) {
-               para_printf(b, "%s\n", d->path);
-               return 1;
+               ret = para_printf(b, "%s\n", d->path);
+               goto out;
+       }
+       if (opts->mode == LS_MODE_CHUNKS) {
+               ret = print_chunk_table(d, b);
+               goto out;
        }
        get_attribute_bitmap(&afsi->attributes, att_buf);
-       ret = get_local_time(&afsi->last_played, last_played_time,
-               sizeof(last_played_time), current_time, opts->mode);
-       if (ret < 0)
-               return ret;
-       get_duration_buf(afhi->seconds_total, duration_buf, opts);
-       if (have_score) {
-               if (opts->mode == LS_MODE_LONG)
-                       sprintf(score_buf, "%*li ", w->score_width, d->score);
-               else
-                       sprintf(score_buf, "%li ", d->score);
+       if (opts->flags & LS_FLAG_UNIXDATE)
+               sprintf(last_played_time, "%llu",
+                       (long long unsigned)afsi->last_played);
+       else {
+               ret = get_local_time(&afsi->last_played, last_played_time,
+                       sizeof(last_played_time), current_time, opts->mode);
+               if (ret < 0)
+                       goto out;
        }
-
+       get_duration_buf(afhi->seconds_total, duration_buf, opts);
        if (opts->mode == LS_MODE_LONG) {
-               para_printf(b,
-                       "%s"    /* score */
+               struct ls_widths *w = &opts->widths;
+               if (opts->flags & LS_FLAG_ADMISSIBLE_ONLY) {
+                       ret = para_printf(b, "%*li ",
+                               opts->widths.score_width, d->score);
+                       if (ret < 0)
+                               goto out;
+               }
+               ret = para_printf(b,
                        "%s "   /* attributes */
+                       "%*u "  /* amp */
                        "%*d "  /* image_id  */
                        "%*d "  /* lyrics_id */
                        "%*d "  /* bitrate */
@@ -865,8 +889,8 @@ static int print_list_item(struct ls_data *d, struct ls_options *opts,
                        "%*d "  /* num_played */
                        "%s "   /* last_played */
                        "%s\n", /* path */
-                       score_buf,
                        att_buf,
+                       w->amp_width, afsi->amp,
                        w->image_id_width, afsi->image_id,
                        w->lyrics_id_width, afsi->lyrics_id,
                        w->bitrate_width, afhi->bitrate,
@@ -878,134 +902,217 @@ static int print_list_item(struct ls_data *d, struct ls_options *opts,
                        last_played_time,
                        d->path
                );
-               return 1;
+               goto out;
        }
-       hash_to_asc(d->hash, asc_hash);
-       att_lines = make_attribute_lines(att_buf, afsi);
-       lyrics_lines = make_lyrics_lines(afsi);
-       image_lines = make_image_lines(afsi);
-       filename_lines = make_filename_lines(d->path, opts->flags);
        if (opts->mode == LS_MODE_MBOX) {
                const char *bn = para_basename(d->path);
-               para_printf(b,
+               ret = para_printf(b,
                        "From foo@localhost %s\n"
                        "Received: from\nTo: bar\nFrom: a\n"
                        "Subject: %s\n\n",
                        last_played_time,
                        bn? bn : "?");
+               if (ret < 0)
+                       goto out;
        }
-       para_printf(b,
-               "%s" /* filename stuff */
-               "%s%s%s%s" /* score */
-               "%s\n" /* attributes */
-               "%s: %s\n" /* hash */
-               "%s" /* image id, image name */
-               "%s" /* lyrics */
-               "%s: %dkbit/s\n" /* bitrate */
-               "%s: %s\n" /* format */
-               "%s: %dHz\n" /* frequency */
-               "%s: %d\n" /* channels */
-               "%s: %s\n" /* duration */
-               "%s: %lu\n" /* seconds total */
-               "%s: %s\n" /* last played time */
-               "%s: %d\n" /* num_played */
-               "%s" /* tag info */
-               "%s: %lu\n" /* chunk time */
-               "%s: %lu\n", /* num chunks */
-               filename_lines,
-               have_score? status_item_list[SI_SCORE] : "",
-                       have_score? ": " : "",
-                       score_buf,
-                       have_score? "\n" : "",
-               att_lines,
-               status_item_list[SI_HASH], asc_hash,
-               image_lines,
-               lyrics_lines,
-               status_item_list[SI_BITRATE], afhi->bitrate,
-               status_item_list[SI_FORMAT], audio_format_name(afsi->audio_format_id),
-               status_item_list[SI_FREQUENCY], afhi->frequency,
-               status_item_list[SI_CHANNELS], afhi->channels,
-               status_item_list[SI_DURATION], duration_buf,
-               status_item_list[SI_SECONDS_TOTAL], afhi->seconds_total,
-               status_item_list[SI_LAST_PLAYED], last_played_time,
-               status_item_list[SI_NUM_PLAYED], afsi->num_played,
-               afhi->info_string,
-               status_item_list[SI_CHUNK_TIME], tv2ms(&afhi->chunk_tv),
-               status_item_list[SI_NUM_CHUNKS], afhi->chunks_total
-       );
+       ret = write_filename_items(b, d->path, opts->flags);
+       if (ret < 0)
+               goto out;
+       ret = write_score(b, d, opts);
+       if (ret < 0)
+               goto out;
+       ret = write_attribute_items(b, att_buf, afsi);
+       if (ret < 0)
+               goto out;
+       ret = write_image_items(b, afsi);
+       if (ret < 0)
+               goto out;
+       ret = write_lyrics_items(b, afsi);
+       if (ret < 0)
+               goto out;
+       hash_to_asc(d->hash, asc_hash);
+       ret = WRITE_STATUS_ITEM(b, SI_HASH, "%s\n", asc_hash);
+       if (ret < 0)
+               goto out;
+       ret = WRITE_STATUS_ITEM(b, SI_BITRATE, "%dkbit/s\n", afhi->bitrate);
+       if (ret < 0)
+               goto out;
+       ret = WRITE_STATUS_ITEM(b, SI_FORMAT, "%s\n",
+               audio_format_name(afsi->audio_format_id));
+       if (ret < 0)
+               goto out;
+       ret = WRITE_STATUS_ITEM(b, SI_FREQUENCY, "%dHz\n", afhi->frequency);
+       if (ret < 0)
+               goto out;
+       ret = WRITE_STATUS_ITEM(b, SI_CHANNELS, "%d\n", afhi->channels);
+       if (ret < 0)
+               goto out;
+       ret = WRITE_STATUS_ITEM(b, SI_DURATION, "%s\n", duration_buf);
+       if (ret < 0)
+               goto out;
+       ret = WRITE_STATUS_ITEM(b, SI_SECONDS_TOTAL, "%lu\n",
+               afhi->seconds_total);
+       if (ret < 0)
+               goto out;
+       ret = WRITE_STATUS_ITEM(b, SI_LAST_PLAYED, "%s\n", last_played_time);
+       if (ret < 0)
+               goto out;
+       ret = WRITE_STATUS_ITEM(b, SI_NUM_PLAYED, "%d\n", afsi->num_played);
+       if (ret < 0)
+               goto out;
+       ret = WRITE_STATUS_ITEM(b, SI_AMPLIFICATION, "%u\n", afsi->amp);
+       if (ret < 0)
+               goto out;
+       ret = WRITE_STATUS_ITEM(b, SI_CHUNK_TIME, "%lu\n",
+               tv2ms(&afhi->chunk_tv));
+       if (ret < 0)
+               goto out;
+       ret = WRITE_STATUS_ITEM(b, SI_NUM_CHUNKS, "%lu\n",
+               afhi->chunks_total);
+       if (ret < 0)
+               goto out;
+       ret = WRITE_STATUS_ITEM(b, SI_TECHINFO, "%s\n", afhi->techinfo);
+       if (ret < 0)
+               goto out;
+       ret = WRITE_STATUS_ITEM(b, SI_ARTIST, "%s\n", afhi->tags.artist);
+       if (ret < 0)
+               goto out;
+       ret = WRITE_STATUS_ITEM(b, SI_TITLE, "%s\n", afhi->tags.title);
+       if (ret < 0)
+               goto out;
+       ret = WRITE_STATUS_ITEM(b, SI_YEAR, "%s\n", afhi->tags.year);
+       if (ret < 0)
+               goto out;
+       ret = WRITE_STATUS_ITEM(b, SI_ALBUM, "%s\n", afhi->tags.album);
+       if (ret < 0)
+               goto out;
+       ret = WRITE_STATUS_ITEM(b, SI_COMMENT, "%s\n", afhi->tags.comment);
+       if (ret < 0)
+               goto out;
        if (opts->mode == LS_MODE_MBOX) {
                struct osl_object lyrics_def;
                lyr_get_def_by_id(afsi->lyrics_id, &lyrics_def);
                if (lyrics_def.data) {
-                       para_printf(b, "Lyrics:\n~~~~~~~\n%s",
+                       ret = para_printf(b, "Lyrics:\n~~~~~~~\n%s",
                                (char *)lyrics_def.data);
                        osl_close_disk_object(&lyrics_def);
                }
        }
-       free(att_lines);
-       free(lyrics_lines);
-       free(image_lines);
-       free(filename_lines);
-       return 1;
-}
-
-void make_empty_status_items(char *buf)
-{
-       sprintf(buf,
-               "%s: \n" /* path */
-               "%s: \n" /* dirname */
-               "%s: \n" /* basename */
-               "%s: \n" /* score */
-               "%s: \n" /* attributes bitmap */
-               "%s: \n" /* attributes txt */
-               "%s: \n" /* hash */
-               "%s: \n" /* image id */
-               "%s: \n" /* image name */
-               "%s: \n" /* lyrics id */
-               "%s: \n" /* lyrics name */
-               "%s: \n" /* bitrate */
-               "%s: \n" /* format */
-               "%s: \n" /* frequency */
-               "%s: \n" /* channels */
-               "%s: \n" /* duration */
-               "%s: \n" /* seconds total */
-               "%s: \n" /* num played */
-               "%s: \n" /* last played */
-               ,
-               status_item_list[SI_PATH],
-               status_item_list[SI_DIRECTORY],
-               status_item_list[SI_BASENAME],
-               status_item_list[SI_SCORE],
-               status_item_list[SI_ATTRIBUTES_BITMAP],
-               status_item_list[SI_ATTRIBUTES_TXT],
-               status_item_list[SI_HASH],
-               status_item_list[SI_IMAGE_ID],
-               status_item_list[SI_IMAGE_NAME],
-               status_item_list[SI_LYRICS_ID],
-               status_item_list[SI_LYRICS_NAME],
-               status_item_list[SI_BITRATE],
-               status_item_list[SI_FORMAT],
-               status_item_list[SI_FREQUENCY],
-               status_item_list[SI_CHANNELS],
-               status_item_list[SI_DURATION],
-               status_item_list[SI_SECONDS_TOTAL],
-               status_item_list[SI_NUM_PLAYED],
-               status_item_list[SI_LAST_PLAYED]
-       );
+out:
+       return ret;
 }
 
-int make_status_items(struct ls_data *d, struct para_buffer *pb)
+static int make_status_items(struct audio_file_data *afd,
+               struct afs_info *afsi, char *path, long score,
+               HASH_TYPE *hash)
 {
+       struct ls_data d = {
+               .afhi = afd->afhi,
+               .afsi = *afsi,
+               .path = path,
+               .score = score,
+               .hash = hash
+       };
        struct ls_options opts = {
                .flags = LS_FLAG_FULL_PATH | LS_FLAG_ADMISSIBLE_ONLY,
                .mode = LS_MODE_VERBOSE,
        };
+       struct para_buffer pb = {.max_size = SHMMAX - 1};
        time_t current_time;
+       int ret;
 
        time(&current_time);
-       return print_list_item(d, &opts, pb, current_time);
+       ret = print_list_item(&d, &opts, &pb, current_time);
+       if (ret < 0)
+               return ret;
+       free(status_items);
+       status_items = pb.buf;
+       memset(&pb, 0, sizeof(pb));
+       pb.max_size = SHMMAX - 1;
+       pb.flags = PBF_SIZE_PREFIX;
+       ret = print_list_item(&d, &opts, &pb, current_time);
+       if (ret < 0) {
+               free(status_items);
+               status_items = NULL;
+               return ret;
+       }
+       free(parser_friendly_status_items);
+       parser_friendly_status_items = pb.buf;
+       return 1;
 }
 
+/**
+ * Mmap the given audio file and update statistics.
+ *
+ * \param aft_row Determines the audio file to be opened and updated.
+ * \param score The score of the audio file.
+ * \param afd Result pointer.
+ *
+ * On success, the numplayed field of the audio file selector info is increased
+ * and the lastplayed time is set to the current time. Finally, the score of
+ * the audio file is updated.
+ *
+ * \return Positive shmid on success, negative on errors.
+ */
+int open_and_update_audio_file(struct osl_row *aft_row, long score,
+       struct audio_file_data *afd)
+{
+       HASH_TYPE *aft_hash, file_hash[HASH_SIZE];
+       struct osl_object afsi_obj;
+       struct afs_info old_afsi, new_afsi;
+       int ret = get_hash_of_row(aft_row, &aft_hash);
+       struct afsi_change_event_data aced;
+       struct osl_object map, chunk_table_obj;
+       char *path;
+
+       if (ret < 0)
+               return ret;
+       ret = get_audio_file_path_of_row(aft_row, &path);
+       if (ret < 0)
+               return ret;
+       ret = get_afsi_object_of_row(aft_row, &afsi_obj);
+       if (ret < 0)
+               return ret;
+       ret = load_afsi(&old_afsi, &afsi_obj);
+       if (ret < 0)
+               return ret;
+       ret = get_afhi_of_row(aft_row, &afd->afhi);
+       if (ret < 0)
+               return ret;
+       afd->afhi.chunk_table = NULL;
+       ret = osl_open_disk_object(audio_file_table, aft_row,
+               AFTCOL_CHUNKS, &chunk_table_obj);
+       if (ret < 0)
+               goto err;
+       ret = mmap_full_file(path, O_RDONLY, &map.data,
+               &map.size, &afd->fd);
+       if (ret < 0)
+               goto err;
+       hash_function(map.data, map.size, file_hash);
+       ret = hash_compare(file_hash, aft_hash);
+       para_munmap(map.data, map.size);
+       if (ret) {
+               ret = -E_HASH_MISMATCH;
+               goto err;
+       }
+       new_afsi = old_afsi;
+       new_afsi.num_played++;
+       new_afsi.last_played = time(NULL);
+       save_afsi(&new_afsi, &afsi_obj); /* in-place update */
+
+       load_chunk_table(&afd->afhi, chunk_table_obj.data);
+       ret = make_status_items(afd, &old_afsi, path, score, file_hash);
+       if (ret < 0)
+               goto err;
+       aced.aft_row = aft_row;
+       aced.old_afsi = &old_afsi;
+       afs_event(AFSI_CHANGE, NULL, &aced);
+       ret = save_afd(afd);
+err:
+       free(afd->afhi.chunk_table);
+       osl_close_disk_object(&chunk_table_obj);
+       return ret;
+}
 
 static int ls_audio_format_compare(const void *a, const void *b)
 {
@@ -1180,7 +1287,7 @@ static int prepare_ls_row(struct osl_row *row, void *ls_opts)
        d->path = path;
        ret = get_hash_of_row(aft_row, &d->hash);
        if (ret < 0)
-               return ret;
+               goto err;
        w = &options->widths;
        GET_NUM_DIGITS(d->afsi.image_id, &num_digits);
        w->image_id_width = PARA_MAX(w->image_id_width, num_digits);
@@ -1193,8 +1300,10 @@ static int prepare_ls_row(struct osl_row *row, void *ls_opts)
        GET_NUM_DIGITS(d->afsi.num_played, &num_digits);
        w->num_played_width = PARA_MAX(w->num_played_width, num_digits);
        /* get the number of chars to print this amount of time */
-       tmp = get_duration_width(d->afhi.seconds_total);
-       w->duration_width = PARA_MAX(w->duration_width, tmp);
+       num_digits = get_duration_width(d->afhi.seconds_total);
+       w->duration_width = PARA_MAX(w->duration_width, num_digits);
+       GET_NUM_DIGITS(d->afsi.amp, &num_digits);
+       w->amp_width = PARA_MAX(w->amp_width, num_digits);
        if (options->flags & LS_FLAG_ADMISSIBLE_ONLY) {
                GET_NUM_DIGITS(score, &num_digits);
                num_digits++; /* add one for the sign (space or "-") */
@@ -1202,18 +1311,20 @@ static int prepare_ls_row(struct osl_row *row, void *ls_opts)
                d->score = score;
        }
        return 1;
+err:
+       return ret;
 }
 
-static int com_ls_callback(const struct osl_object *query,
-               struct osl_object *ls_output)
+static void com_ls_callback(int fd, const struct osl_object *query)
 {
        struct ls_options *opts = query->data;
        char *p, *pattern_start = (char *)query->data + sizeof(*opts);
-       struct para_buffer b = {.buf = NULL, .size = 0};
+       struct para_buffer b = {.max_size = SHMMAX,
+               .flags = (opts->mode == LS_MODE_PARSER)? PBF_SIZE_PREFIX : 0,
+               .max_size_handler = pass_buffer_as_shm, .private_data = &fd};
        int i = 0, ret;
        time_t current_time;
 
-
        if (opts->num_patterns) {
                opts->patterns = para_malloc(opts->num_patterns * sizeof(char *));
                for (i = 0, p = pattern_start; i < opts->num_patterns; i++) {
@@ -1225,11 +1336,10 @@ static int com_ls_callback(const struct osl_object *query,
        if (opts->flags & LS_FLAG_ADMISSIBLE_ONLY)
                ret = admissible_file_loop(opts, prepare_ls_row);
        else
-               ret = osl_rbtree_loop(audio_file_table, AFTCOL_PATH, opts,
-                       prepare_ls_row);
+               ret = osl(osl_rbtree_loop(audio_file_table, AFTCOL_PATH, opts,
+                       prepare_ls_row));
        if (ret < 0)
                goto out;
-       ret = opts->num_patterns? -E_NO_MATCH : 0;
        if (!opts->num_matching_paths)
                goto out;
        ret = sort_matching_paths(opts);
@@ -1240,36 +1350,34 @@ static int com_ls_callback(const struct osl_object *query,
                for (i = opts->num_matching_paths - 1; i >= 0; i--) {
                        ret = print_list_item(opts->data_ptr[i], opts, &b, current_time);
                        if (ret < 0)
-                               break;
+                               goto out;
                }
        else
                for (i = 0; i < opts->num_matching_paths; i++) {
                        ret = print_list_item(opts->data_ptr[i], opts, &b, current_time);
                        if (ret < 0)
-                               break;
+                               goto out;
                }
-       ret = 1;
 out:
-       ls_output->data = b.buf;
-       ls_output->size = b.size;
+       if (b.offset)
+               pass_buffer_as_shm(b.buf, b.offset, &fd);
+       free(b.buf);
        free(opts->data);
        free(opts->data_ptr);
        free(opts->patterns);
-       return ret;
 }
 
 /*
  * TODO: flags -h (sort by hash)
  */
-int com_ls(int fd, int argc, char * const * const argv)
+int com_ls(struct rc4_context *rc4c, int argc, char * const * const argv)
 {
        int i, ret;
        unsigned flags = 0;
        enum ls_sorting_method sort = LS_SORT_BY_PATH;
        enum ls_listing_mode mode = LS_MODE_SHORT;
        struct ls_options opts = {.patterns = NULL};
-       struct osl_object query = {.data = &opts, .size = sizeof(opts)},
-               ls_output;
+       struct osl_object query = {.data = &opts, .size = sizeof(opts)};
 
        for (i = 1; i < argc; i++) {
                const char *arg = argv[i];
@@ -1299,6 +1407,12 @@ int com_ls(int fd, int argc, char * const * const argv)
                        case 'm':
                                mode = LS_MODE_MBOX;
                                continue;
+                       case 'c':
+                               mode = LS_MODE_CHUNKS;
+                               continue;
+                       case 'p':
+                               mode = LS_MODE_PARSER;
+                               continue;
                        default:
                                return -E_AFT_SYNTAX;
                        }
@@ -1315,6 +1429,10 @@ int com_ls(int fd, int argc, char * const * const argv)
                        flags |= LS_FLAG_REVERSE;
                        continue;
                }
+               if (!strcmp(arg, "-d")) {
+                       flags |= LS_FLAG_UNIXDATE;
+                       continue;
+               }
                if (!strncmp(arg, "-s", 2)) {
                        if (!*(arg + 2) || *(arg + 3))
                                return -E_AFT_SYNTAX;
@@ -1364,11 +1482,7 @@ int com_ls(int fd, int argc, char * const * const argv)
        opts.mode = mode;
        opts.num_patterns = argc - i;
        ret = send_option_arg_callback_request(&query, opts.num_patterns,
-               argv + i, com_ls_callback, &ls_output);
-       if (ret > 0) {
-               ret = send_buffer(fd, (char *)ls_output.data);
-               free(ls_output.data);
-       }
+               argv + i, com_ls_callback, rc4_send_result, rc4c);
        return ret;
 }
 
@@ -1378,12 +1492,12 @@ int com_ls(int fd, int argc, char * const * const argv)
  * \param private_data An arbitrary data pointer, passed to \a func.
  * \param func The custom function to be called.
  *
- * \return The return value of the underlying call to osl_rbtree_loop().
+ * \return Standard.
  */
 int audio_file_loop(void *private_data, osl_rbtree_loop_func *func)
 {
-       return osl_rbtree_loop(audio_file_table, AFTCOL_HASH, private_data,
-               func);
+       return osl(osl_rbtree_loop(audio_file_table, AFTCOL_HASH, private_data,
+               func));
 }
 
 static struct osl_row *find_hash_sister(HASH_TYPE *hash)
@@ -1515,8 +1629,7 @@ enum com_add_flags {
        ADD_FLAG_ALL = 8,
 };
 
-static int com_add_callback(const struct osl_object *query,
-               struct osl_object *result)
+static void com_add_callback(int fd, const struct osl_object *query)
 {
        char *buf = query->data, *path;
        struct osl_row *pb, *aft_row;
@@ -1528,7 +1641,9 @@ static int com_add_callback(const struct osl_object *query,
        char afsi_buf[AFSI_SIZE];
        uint32_t flags = read_u32(buf + CAB_FLAGS_OFFSET);
        struct afs_info default_afsi = {.last_played = 0};
-       struct para_buffer msg = {.buf = NULL};
+       struct para_buffer msg = {.max_size = SHMMAX,
+               .max_size_handler = pass_buffer_as_shm, .private_data = &fd};
+       uint16_t afhi_offset, chunks_offset;
 
        hash = (HASH_TYPE *)buf + CAB_HASH_OFFSET;
        hash_to_asc(hash, asc);;
@@ -1542,34 +1657,40 @@ static int com_add_callback(const struct osl_object *query,
        PARA_INFO_LOG("request to add %s\n", path);
        hs = find_hash_sister(hash);
        ret = aft_get_row_of_path(path, &pb);
-       if (ret < 0 && ret != -E_RB_KEY_NOT_FOUND)
-               return ret;
+       if (ret < 0 && ret != -OSL_ERRNO_TO_PARA_ERROR(E_OSL_RB_KEY_NOT_FOUND))
+               goto out;
        if (hs && pb && hs == pb && !(flags & ADD_FLAG_FORCE)) {
                if (flags & ADD_FLAG_VERBOSE)
-                       para_printf(&msg, "ignoring duplicate\n");
-               ret = 1;
+                       ret = para_printf(&msg, "ignoring duplicate\n");
+               else
+                       ret = 1;
                goto out;
        }
        if (hs && hs != pb) {
                struct osl_object obj;
                if (pb) { /* hs trumps pb, remove pb */
-                       if (flags & ADD_FLAG_VERBOSE)
-                               para_printf(&msg, "removing path brother\n");
-                       ret = osl_del_row(audio_file_table, pb);
+                       if (flags & ADD_FLAG_VERBOSE) {
+                               ret = para_printf(&msg, "removing path brother\n");
+                               if (ret < 0)
+                                       goto out;
+                       }
+                       ret = osl(osl_del_row(audio_file_table, pb));
                        if (ret < 0)
                                goto out;
                        pb = NULL;
                }
                /* file rename, update hs' path */
                if (flags & ADD_FLAG_VERBOSE) {
-                       ret = osl_get_object(audio_file_table, hs,
-                               AFTCOL_PATH, &obj);
+                       ret = osl(osl_get_object(audio_file_table, hs,
+                               AFTCOL_PATH, &obj));
+                       if (ret < 0)
+                               goto out;
+                       ret = para_printf(&msg, "renamed from %s\n", (char *)obj.data);
                        if (ret < 0)
                                goto out;
-                       para_printf(&msg, "renamed from %s\n", (char *)obj.data);
                }
-               ret = osl_update_object(audio_file_table, hs, AFTCOL_PATH,
-                       &objs[AFTCOL_PATH]);
+               ret = osl(osl_update_object(audio_file_table, hs, AFTCOL_PATH,
+                       &objs[AFTCOL_PATH]));
                if (ret < 0)
                        goto out;
                afs_event(AUDIO_FILE_RENAME, &msg, hs);
@@ -1577,8 +1698,8 @@ static int com_add_callback(const struct osl_object *query,
                        goto out;
        }
        /* no hs or force mode, child must have sent afhi */
-       uint16_t afhi_offset = read_u16(buf + CAB_AFHI_OFFSET_POS);
-       uint16_t chunks_offset = read_u16(buf + CAB_CHUNKS_OFFSET_POS);
+       afhi_offset = read_u16(buf + CAB_AFHI_OFFSET_POS);
+       chunks_offset = read_u16(buf + CAB_CHUNKS_OFFSET_POS);
 
        objs[AFTCOL_AFHI].data = buf + afhi_offset;
        objs[AFTCOL_AFHI].size = chunks_offset - afhi_offset;
@@ -1594,9 +1715,12 @@ static int com_add_callback(const struct osl_object *query,
                if (ret < 0)
                        goto out;
                hash_to_asc(old_hash, old_asc);
-               if (flags & ADD_FLAG_VERBOSE)
-                       para_printf(&msg, "file change: %s -> %s\n",
+               if (flags & ADD_FLAG_VERBOSE) {
+                       ret = para_printf(&msg, "file change: %s -> %s\n",
                                old_asc, asc);
+                       if (ret < 0)
+                               goto out;
+               }
                ret = osl_update_object(audio_file_table, pb, AFTCOL_HASH,
                        &objs[AFTCOL_HASH]);
                if (ret < 0)
@@ -1605,109 +1729,108 @@ static int com_add_callback(const struct osl_object *query,
        if (hs || pb) { /* (hs != NULL and pb != NULL) implies hs == pb */
                struct osl_row *row = pb? pb : hs;
                /* update afhi and chunk_table */
-               if (flags & ADD_FLAG_VERBOSE)
-                       para_printf(&msg, "updating afhi and chunk table\n");
-               ret = osl_update_object(audio_file_table, row, AFTCOL_AFHI,
-                       &objs[AFTCOL_AFHI]);
+               if (flags & ADD_FLAG_VERBOSE) {
+                       ret = para_printf(&msg, "updating afhi and chunk table\n");
+                       if (ret < 0)
+                               goto out;
+               }
+               ret = osl(osl_update_object(audio_file_table, row, AFTCOL_AFHI,
+                       &objs[AFTCOL_AFHI]));
                if (ret < 0)
                        goto out;
-               ret = osl_update_object(audio_file_table, row, AFTCOL_CHUNKS,
-                       &objs[AFTCOL_CHUNKS]);
+               ret = osl(osl_update_object(audio_file_table, row, AFTCOL_CHUNKS,
+                       &objs[AFTCOL_CHUNKS]));
                if (ret < 0)
                        goto out;
                afs_event(AFHI_CHANGE, &msg, row);
                goto out;
        }
        /* new entry, use default afsi */
-       if (flags & ADD_FLAG_VERBOSE)
-               para_printf(&msg, "new file\n");
+       if (flags & ADD_FLAG_VERBOSE) {
+               ret = para_printf(&msg, "new file\n");
+               if (ret < 0)
+                       goto out;
+       }
        default_afsi.last_played = time(NULL) - 365 * 24 * 60 * 60;
        default_afsi.audio_format_id = read_u8(buf + CAB_AUDIO_FORMAT_OFFSET);
 
        objs[AFTCOL_AFSI].data = &afsi_buf;
        objs[AFTCOL_AFSI].size = AFSI_SIZE;
        save_afsi(&default_afsi, &objs[AFTCOL_AFSI]);
-       ret = osl_add_and_get_row(audio_file_table, objs, &aft_row);
+       ret = osl(osl_add_and_get_row(audio_file_table, objs, &aft_row));
        afs_event(AUDIO_FILE_ADD, &msg, aft_row);
 out:
        if (ret < 0)
                para_printf(&msg, "%s\n", para_strerror(-ret));
-       if (!msg.buf)
-               return 0;
-       result->data = msg.buf;
-       result->size = msg.size;
-       return 1;
+       if (msg.offset)
+               pass_buffer_as_shm(msg.buf, msg.offset, &fd);
+       free(msg.buf);
 }
 
 /** Used by com_add(). */
 struct private_add_data {
-       /** The socket file descriptor. */
-       int fd;
+       /** The socket file descriptor, including rc4 keys. */
+       struct rc4_context *rc4c;
        /** The given add flags. */
        uint32_t flags;
 };
 
-static int path_brother_callback(const struct osl_object *query,
-               struct osl_object *result)
+static void path_brother_callback(int fd, const struct osl_object *query)
 {
        char *path = query->data;
        struct osl_row *path_brother;
        int ret = aft_get_row_of_path(path, &path_brother);
        if (ret < 0)
-               return ret;
-       result->data = para_malloc(sizeof(path_brother));
-       result->size = sizeof(path_brother);
-       *(struct osl_row **)(result->data) = path_brother;
-       return 1;
+               return;
+       pass_buffer_as_shm((char *)&path_brother, sizeof(path_brother), &fd);
 }
 
-static int hash_sister_callback(const struct osl_object *query,
-               struct osl_object *result)
+static void hash_sister_callback(int fd, const struct osl_object *query)
 {
        HASH_TYPE *hash = query->data;
        struct osl_row *hash_sister;
 
        hash_sister = find_hash_sister(hash);
        if (!hash_sister)
-               return -E_RB_KEY_NOT_FOUND;
-       result->data = para_malloc(sizeof(hash_sister));
-       result->size = sizeof(hash_sister);
-       *(struct osl_row **)(result->data) = hash_sister;
+               return;
+       pass_buffer_as_shm((char *)&hash_sister, sizeof(hash_sister), &fd);
+}
+
+static int get_row_pointer_from_result(struct osl_object *result, void *private)
+{
+       struct osl_row **row = private;
+       *row = result->data;
        return 1;
 }
 
-static int add_one_audio_file(const char *path, const void *private_data)
+static int add_one_audio_file(const char *path, void *private_data)
 {
-       int ret, send_ret = 1;
+       int ret, send_ret = 1, fd;
        uint8_t format_num = -1;
-       const struct private_add_data *pad = private_data;
+       struct private_add_data *pad = private_data;
        struct afh_info afhi, *afhi_ptr = NULL;
        struct osl_row *pb = NULL, *hs = NULL; /* path brother/hash sister */
-       struct osl_object map, obj = {.data = NULL}, query, result = {.data = NULL};
+       struct osl_object map, obj = {.data = NULL}, query;
        HASH_TYPE hash[HASH_SIZE];
 
-       afhi.header_offset = 0;
-       afhi.header_len = 0;
        ret = guess_audio_format(path);
        if (ret < 0 && !(pad->flags & ADD_FLAG_ALL))
                goto out_free;
        query.data = (char *)path;
        query.size = strlen(path) + 1;
-       ret = send_callback_request(path_brother_callback, &query, &result);
-       if (ret < 0 && ret != -E_RB_KEY_NOT_FOUND)
+       ret = send_callback_request(path_brother_callback, &query,
+               get_row_pointer_from_result, &pb);
+       if (ret < 0 && ret != -OSL_ERRNO_TO_PARA_ERROR(E_OSL_RB_KEY_NOT_FOUND))
                goto out_free;
-       if (ret >= 0) {
-               pb = *(struct osl_row **)result.data;
-               free(result.data);
-       }
        ret = 1;
        if (pb && (pad->flags & ADD_FLAG_LAZY)) { /* lazy is really cheap */
                if (pad->flags & ADD_FLAG_VERBOSE)
-                       send_ret = send_va_buffer(pad->fd, "lazy-ignore: %s\n", path);
+                       send_ret = rc4_send_va_buffer(pad->rc4c,
+                               "lazy-ignore: %s\n", path);
                goto out_free;
        }
        /* We still want to add this file. Compute its hash. */
-       ret = mmap_full_file(path, O_RDONLY, &map.data, &map.size, NULL);
+       ret = mmap_full_file(path, O_RDONLY, &map.data, &map.size, &fd);
        if (ret < 0)
                goto out_free;
        hash_function(map.data, map.size, hash);
@@ -1715,18 +1838,15 @@ static int add_one_audio_file(const char *path, const void *private_data)
        /* Check whether the database contains a file with the same hash. */
        query.data = hash;
        query.size = HASH_SIZE;
-       ret = send_callback_request(hash_sister_callback, &query, &result);
-       if (ret < 0 && ret != -E_RB_KEY_NOT_FOUND)
+       ret = send_callback_request(hash_sister_callback, &query,
+               get_row_pointer_from_result, &hs);
+       if (ret < 0)
                goto out_unmap;
-       if (ret >= 0) {
-               hs = *(struct osl_row **)result.data;
-               free(result.data);
-       }
        /* Return success if we already know this file. */
        ret = 1;
        if (pb && hs && hs == pb && !(pad->flags & ADD_FLAG_FORCE)) {
                if (pad->flags & ADD_FLAG_VERBOSE)
-                       send_ret = send_va_buffer(pad->fd,
+                       send_ret = rc4_send_va_buffer(pad->rc4c,
                                "%s exists, not forcing update\n", path);
                goto out_unmap;
        }
@@ -1735,44 +1855,49 @@ static int add_one_audio_file(const char *path, const void *private_data)
         * there is a hash sister and FORCE was not given.
         */
        if (!hs || (pad->flags & ADD_FLAG_FORCE)) {
-               ret = compute_afhi(path, map.data, map.size, &afhi);
+               ret = compute_afhi(path, map.data, map.size, fd, &afhi);
                if (ret < 0)
                        goto out_unmap;
                format_num = ret;
                afhi_ptr = &afhi;
        }
        munmap(map.data, map.size);
+       close(fd);
        if (pad->flags & ADD_FLAG_VERBOSE) {
-               send_ret = send_va_buffer(pad->fd, "adding %s\n", path);
+               send_ret = rc4_send_va_buffer(pad->rc4c, "adding %s\n", path);
                if (send_ret < 0)
                        goto out_free;
        }
        save_add_callback_buffer(hash, path, afhi_ptr, pad->flags, format_num, &obj);
        /* Ask afs to consider this entry for adding. */
-       ret = send_callback_request(com_add_callback, &obj, &result);
-       if (ret > 0) {
-               send_ret = send_va_buffer(pad->fd, "%s", (char *)result.data);
-               free(result.data);
-       }
+       ret = send_callback_request(com_add_callback, &obj, rc4_send_result, pad->rc4c);
        goto out_free;
 
 out_unmap:
+       close(fd);
        munmap(map.data, map.size);
 out_free:
        if (ret < 0 && send_ret >= 0)
-               send_ret = send_va_buffer(pad->fd, "failed to add %s (%s)\n", path,
-                       para_strerror(-ret));
+               send_ret = rc4_send_va_buffer(pad->rc4c,
+                       "failed to add %s (%s)\n", path, para_strerror(-ret));
        free(obj.data);
-       if (afhi_ptr)
+       if (afhi_ptr) {
                free(afhi_ptr->chunk_table);
+               free(afhi_ptr->techinfo);
+               free(afhi_ptr->tags.artist);
+               free(afhi_ptr->tags.title);
+               free(afhi_ptr->tags.year);
+               free(afhi_ptr->tags.album);
+               free(afhi_ptr->tags.comment);
+       }
        /* Stop adding files only on send errors. */
        return send_ret;
 }
 
-int com_add(int fd, int argc, char * const * const argv)
+int com_add(struct rc4_context *rc4c, int argc, char * const * const argv)
 {
        int i, ret;
-       struct private_add_data pad = {.fd = fd, .flags = 0};
+       struct private_add_data pad = {.rc4c = rc4c, .flags = 0};
        struct stat statbuf;
 
        for (i = 1; i < argc; i++) {
@@ -1806,7 +1931,7 @@ int com_add(int fd, int argc, char * const * const argv)
                char *path;
                ret = verify_path(argv[i], &path);
                if (ret < 0) {
-                       ret = send_va_buffer(fd, "%s: %s\n", argv[i],
+                       ret = rc4_send_va_buffer(rc4c, "%s: %s\n", argv[i],
                                para_strerror(-ret));
                        if (ret < 0)
                                return ret;
@@ -1814,7 +1939,7 @@ int com_add(int fd, int argc, char * const * const argv)
                }
                ret = stat(path, &statbuf);
                if (ret < 0) {
-                       ret = send_va_buffer(fd, "failed to stat %s (%s)\n", path,
+                       ret = rc4_send_va_buffer(rc4c, "failed to stat %s (%s)\n", path,
                                strerror(errno));
                        free(path);
                        if (ret < 0)
@@ -1827,7 +1952,7 @@ int com_add(int fd, int argc, char * const * const argv)
                else
                        ret = add_one_audio_file(path, &pad);
                if (ret < 0) {
-                       send_va_buffer(fd, "%s: %s\n", path, para_strerror(-ret));
+                       rc4_send_va_buffer(rc4c, "%s: %s\n", path, para_strerror(-ret));
                        free(path);
                        return ret;
                }
@@ -1855,11 +1980,13 @@ struct com_touch_options {
        int32_t num_played;
        /** New last played count. */
        int64_t last_played;
-       /** new lyrics id. */
+       /** New lyrics id. */
        int32_t lyrics_id;
-       /** new image id. */
+       /** New image id. */
        int32_t image_id;
-       /** command line flags (see \ref touch_flags). */
+       /** New amplification value. */
+       int32_t amp;
+       /** Command line flags (see \ref touch_flags). */
        unsigned flags;
 };
 
@@ -1880,30 +2007,32 @@ static int touch_audio_file(__a_unused struct osl_table *table,
        struct osl_object obj;
        struct afs_info old_afsi, new_afsi;
        int ret, no_options = tad->cto->num_played < 0 && tad->cto->last_played < 0 &&
-               tad->cto->lyrics_id < 0 && tad->cto->image_id < 0;
+               tad->cto->lyrics_id < 0 && tad->cto->image_id < 0 && tad->cto->amp < 0;
        struct afsi_change_event_data aced;
 
        ret = get_afsi_object_of_row(row, &obj);
-       if (ret < 0) {
-               para_printf(&tad->pb, "%s: %s\n", name, para_strerror(-ret));
-               return 1;
-       }
+       if (ret < 0)
+               return para_printf(&tad->pb, "%s: %s\n", name, para_strerror(-ret));
        ret = load_afsi(&old_afsi, &obj);
-       if (ret < 0) {
-               para_printf(&tad->pb, "%s: %s\n", name, para_strerror(-ret));
-               return 1;
-       }
+       if (ret < 0)
+               return para_printf(&tad->pb, "%s: %s\n", name, para_strerror(-ret));
        new_afsi = old_afsi;
        if (no_options) {
                new_afsi.num_played++;
                new_afsi.last_played = time(NULL);
-               if (tad->cto->flags & TOUCH_FLAG_VERBOSE)
-                       para_printf(&tad->pb, "%s: num_played = %u, "
+               if (tad->cto->flags & TOUCH_FLAG_VERBOSE) {
+                       ret = para_printf(&tad->pb, "%s: num_played = %u, "
                                "last_played = now()\n", name,
                                new_afsi.num_played);
+                       if (ret < 0)
+                               return ret;
+               }
        } else {
-               if (tad->cto->flags & TOUCH_FLAG_VERBOSE)
-                       para_printf(&tad->pb, "touching %s\n", name);
+               if (tad->cto->flags & TOUCH_FLAG_VERBOSE) {
+                       ret = para_printf(&tad->pb, "touching %s\n", name);
+                       if (ret < 0)
+                               return ret;
+               }
                if (tad->cto->lyrics_id >= 0)
                        new_afsi.lyrics_id = tad->cto->lyrics_id;
                if (tad->cto->image_id >= 0)
@@ -1912,6 +2041,8 @@ static int touch_audio_file(__a_unused struct osl_table *table,
                        new_afsi.num_played = tad->cto->num_played;
                if (tad->cto->last_played >= 0)
                        new_afsi.last_played = tad->cto->last_played;
+               if (tad->cto->amp >= 0)
+                       new_afsi.amp = tad->cto->amp;
        }
        tad->num_matches++;
        save_afsi(&new_afsi, &obj); /* in-place update */
@@ -1921,11 +2052,16 @@ static int touch_audio_file(__a_unused struct osl_table *table,
        return 1;
 }
 
-static int com_touch_callback(const struct osl_object *query,
-               struct osl_object *result)
+static void com_touch_callback(int fd, const struct osl_object *query)
 {
-       struct touch_action_data tad = {.cto = query->data};
-       int ret;
+       struct touch_action_data tad = {.cto = query->data,
+               .pb = {
+                       .max_size = SHMMAX,
+                       .private_data = &fd,
+                       .max_size_handler = pass_buffer_as_shm
+               }
+       };
+       int ret, ret2 = 0;
        struct pattern_match_data pmd = {
                .table = audio_file_table,
                .loop_col_num = AFTCOL_HASH,
@@ -1939,28 +2075,25 @@ static int com_touch_callback(const struct osl_object *query,
                pmd.fnmatch_flags |= FNM_PATHNAME;
        ret = for_each_matching_row(&pmd);
        if (ret < 0)
-               para_printf(&tad.pb, "%s\n", para_strerror(-ret));
+               ret2 = para_printf(&tad.pb, "%s\n", para_strerror(-ret));
        else
                if (!tad.num_matches)
-                       para_printf(&tad.pb, "no matches\n");
-       if (tad.pb.buf) {
-               result->data = tad.pb.buf;
-               result->size = tad.pb.size;
-               return 1;
-       }
-       return ret < 0? ret : 0;
+                       ret2 = para_printf(&tad.pb, "no matches\n");
+       if (ret2 >= 0 && tad.pb.offset)
+               pass_buffer_as_shm(tad.pb.buf, tad.pb.offset, &fd);
+       free(tad.pb.buf);
 }
 
-int com_touch(int fd, int argc, char * const * const argv)
+int com_touch(struct rc4_context *rc4c, int argc, char * const * const argv)
 {
        struct com_touch_options cto = {
                .num_played = -1,
                .last_played = -1,
                .lyrics_id = -1,
-               .image_id = -1
+               .image_id = -1,
+               .amp = -1,
        };
-       struct osl_object query = {.data = &cto, .size = sizeof(cto)},
-               result;
+       struct osl_object query = {.data = &cto, .size = sizeof(cto)};
        int i, ret;
 
 
@@ -1972,28 +2105,38 @@ int com_touch(int fd, int argc, char * const * const argv)
                        i++;
                        break;
                }
-               if (!strncmp(arg, "-n", 2)) {
-                       ret = para_atoi32(arg + 2, &cto.num_played);
+               if (!strncmp(arg, "-n=", 3)) {
+                       ret = para_atoi32(arg + 3, &cto.num_played);
                        if (ret < 0)
                                return ret;
                        continue;
                }
-               if (!strncmp(arg, "-l", 2)) {
-                       ret = para_atoi64(arg + 2, &cto.last_played);
+               if (!strncmp(arg, "-l=", 3)) {
+                       ret = para_atoi64(arg + 3, &cto.last_played);
+                       if (ret < 0)
+                               return ret;
+                       continue;
+               }
+               if (!strncmp(arg, "-y=", 3)) {
+                       ret = para_atoi32(arg + 3, &cto.lyrics_id);
                        if (ret < 0)
                                return ret;
                        continue;
                }
-               if (!strncmp(arg, "-y", 2)) {
-                       ret = para_atoi32(arg + 2, &cto.lyrics_id);
+               if (!strncmp(arg, "-i=", 3)) {
+                       ret = para_atoi32(arg + 3, &cto.image_id);
                        if (ret < 0)
                                return ret;
                        continue;
                }
-               if (!strncmp(arg, "-i", 2)) {
-                       ret = para_atoi32(arg + 2, &cto.image_id);
+               if (!strncmp(arg, "-a=", 3)) {
+                       int32_t val;
+                       ret = para_atoi32(arg + 3, &val);
                        if (ret < 0)
                                return ret;
+                       if (val < 0 || val > 255)
+                               return -ERRNO_TO_PARA_ERROR(EINVAL);
+                       cto.amp = val;
                        continue;
                }
                if (!strcmp(arg, "-p")) {
@@ -2009,15 +2152,9 @@ int com_touch(int fd, int argc, char * const * const argv)
        if (i >= argc)
                return -E_AFT_SYNTAX;
        ret = send_option_arg_callback_request(&query, argc - i,
-               argv + i, com_touch_callback, &result);
-       if (!ret)
-               return 0;
-       if (ret < 0) {
-               send_va_buffer(fd, "%s\n", para_strerror(-ret));
-               return ret;
-       }
-       ret = send_buffer(fd, (char *)result.data);
-       free(result.data);
+               argv + i, com_touch_callback, rc4_send_result, rc4c);
+       if (ret < 0)
+               rc4_send_va_buffer(rc4c, "%s\n", para_strerror(-ret));
        return ret;
 }
 
@@ -2047,21 +2184,29 @@ static int remove_audio_file(__a_unused struct osl_table *table,
        struct com_rm_action_data *crd = data;
        int ret;
 
-       if (crd->flags & RM_FLAG_VERBOSE)
-               para_printf(&crd->pb, "removing %s\n", name);
+       if (crd->flags & RM_FLAG_VERBOSE) {
+               ret = para_printf(&crd->pb, "removing %s\n", name);
+               if (ret < 0)
+                       return ret;
+       }
        afs_event(AUDIO_FILE_REMOVE, &crd->pb, row);
-       ret = osl_del_row(audio_file_table, row);
+       ret = osl(osl_del_row(audio_file_table, row));
        if (ret < 0)
                para_printf(&crd->pb, "%s: %s\n", name, para_strerror(-ret));
        else
                crd->num_removed++;
-       return 1;
+       return ret;
 }
 
-static int com_rm_callback(const struct osl_object *query,
-               __a_unused struct osl_object *result)
+static void com_rm_callback(int fd, const struct osl_object *query)
 {
-       struct com_rm_action_data crd = {.flags = *(uint32_t *)query->data};
+       struct com_rm_action_data crd = {.flags = *(uint32_t *)query->data,
+               .pb = {
+                       .max_size = SHMMAX,
+                       .private_data = &fd,
+                       .max_size_handler = pass_buffer_as_shm
+               }
+       };
        int ret;
        struct pattern_match_data pmd = {
                .table = audio_file_table,
@@ -2075,28 +2220,26 @@ static int com_rm_callback(const struct osl_object *query,
        if (crd.flags & RM_FLAG_FNM_PATHNAME)
                pmd.fnmatch_flags |= FNM_PATHNAME;
        ret = for_each_matching_row(&pmd);
-       if (ret < 0)
+       if (ret < 0) {
                para_printf(&crd.pb, "%s\n", para_strerror(-ret));
+               return;
+       }
        if (!crd.num_removed && !(crd.flags & RM_FLAG_FORCE))
-               para_printf(&crd.pb, "no matches -- nothing removed\n");
+               ret = para_printf(&crd.pb, "no matches -- nothing removed\n");
        else {
                if (crd.flags & RM_FLAG_VERBOSE)
-                       para_printf(&crd.pb, "removed %u files\n", crd.num_removed);
+                       ret = para_printf(&crd.pb, "removed %u files\n", crd.num_removed);
        }
-       if (crd.pb.buf) {
-               result->data = crd.pb.buf;
-               result->size = crd.pb.size;
-               return 1;
-       }
-       return ret < 0? ret : 0;
+       if (ret >= 0 && crd.pb.offset)
+               pass_buffer_as_shm(crd.pb.buf, crd.pb.offset, &fd);
+       free(crd.pb.buf);
 }
 
 /* TODO options: -r (recursive) */
-int com_rm(int fd, int argc,  char * const * const argv)
+int com_rm(struct rc4_context *rc4c, int argc,  char * const * const argv)
 {
        uint32_t flags = 0;
-       struct osl_object query = {.data = &flags, .size = sizeof(flags)},
-               result;
+       struct osl_object query = {.data = &flags, .size = sizeof(flags)};
        int i, ret;
 
        for (i = 1; i < argc; i++) {
@@ -2124,15 +2267,9 @@ int com_rm(int fd, int argc,  char * const * const argv)
        if (i >= argc)
                return -E_AFT_SYNTAX;
        ret = send_option_arg_callback_request(&query, argc - i, argv + i,
-               com_rm_callback, &result);
-       if (!ret)
-               return 0;
-       if (ret < 0) {
-               send_va_buffer(fd, "%s\n", para_strerror(-ret));
-               return ret;
-       }
-       ret = send_buffer(fd, (char *)result.data);
-       free(result.data);
+               com_rm_callback, rc4_send_result, rc4c);
+       if (ret < 0)
+               rc4_send_va_buffer(rc4c, "%s\n", para_strerror(-ret));
        return ret;
 }
 
@@ -2194,24 +2331,29 @@ static int copy_selector_info(__a_unused struct osl_table *table,
                target_afsi.attributes = cad->source_afsi.attributes;
        save_afsi(&target_afsi, &target_afsi_obj); /* in-place update */
        cad->num_copied++;
-       if (cad->flags & CPSI_FLAG_VERBOSE)
-               para_printf(&cad->pb, "copied afsi to %s\n", name);
+       if (cad->flags & CPSI_FLAG_VERBOSE) {
+               ret = para_printf(&cad->pb, "copied afsi to %s\n", name);
+               if (ret < 0)
+                       return ret;
+       }
        aced.aft_row = row;
        aced.old_afsi = &old_afsi;
        afs_event(AFSI_CHANGE, &cad->pb, &aced);
        return 1;
 }
 
-static int com_cpsi_callback(const struct osl_object *query,
-               struct osl_object *result)
+static void com_cpsi_callback(int fd, const struct osl_object *query)
 {
-       struct cpsi_action_data cad = {.flags = *(unsigned *)query->data};
+       struct cpsi_action_data cad = {
+               .flags = *(unsigned *)query->data,
+               .pb = {
+                       .max_size = SHMMAX,
+                       .private_data = &fd,
+                       .max_size_handler = pass_buffer_as_shm
+               }
+       };
        int ret;
        char *source_path = (char *)query->data + sizeof(cad.flags);
-
-       ret = get_afsi_of_path(source_path, &cad.source_afsi);
-       if (ret < 0)
-               goto out;
        struct pattern_match_data pmd = {
                .table = audio_file_table,
                .loop_col_num = AFTCOL_HASH,
@@ -2222,32 +2364,31 @@ static int com_cpsi_callback(const struct osl_object *query,
                .data = &cad,
                .action = copy_selector_info
        };
+
+       ret = get_afsi_of_path(source_path, &cad.source_afsi);
+       if (ret < 0)
+               goto out;
        ret = for_each_matching_row(&pmd);
 out:
        if (ret < 0)
                para_printf(&cad.pb, "%s\n", para_strerror(-ret));
-       if (cad.flags & CPSI_FLAG_VERBOSE) {
+       else if (cad.flags & CPSI_FLAG_VERBOSE) {
                if (cad.num_copied)
                        para_printf(&cad.pb, "copied requested afsi from %s "
-                               "to %u files\n",
-                               source_path, cad.num_copied);
+                               "to %u files\n", source_path, cad.num_copied);
                else
                        para_printf(&cad.pb, "nothing copied\n");
        }
-       if (cad.pb.buf) {
-               result->data = cad.pb.buf;
-               result->size = cad.pb.size;
-               return 1;
-       }
-       return ret < 0? ret : 0;
+       if (cad.pb.offset)
+               pass_buffer_as_shm(cad.pb.buf, cad.pb.offset, &fd);
+       free(cad.pb.buf);
 }
 
-int com_cpsi(int fd, int argc,  char * const * const argv)
+int com_cpsi(struct rc4_context *rc4c, int argc,  char * const * const argv)
 {
        unsigned flags = 0;
        int i, ret;
-       struct osl_object options = {.data = &flags, .size = sizeof(flags)},
-               result;
+       struct osl_object options = {.data = &flags, .size = sizeof(flags)};
 
        for (i = 1; i < argc; i++) {
                const char *arg = argv[i];
@@ -2283,23 +2424,36 @@ int com_cpsi(int fd, int argc,  char * const * const argv)
                }
                break;
        }
-       if (i + 1 >= argc) /* need at least souce file and pattern */
+       if (i + 1 >= argc) /* need at least source file and pattern */
                return -E_AFT_SYNTAX;
        if (!(flags & ~CPSI_FLAG_VERBOSE)) /* no copy flags given */
                flags = ~(unsigned)CPSI_FLAG_VERBOSE | flags;
        ret = send_option_arg_callback_request(&options, argc - i, argv + i,
-               com_cpsi_callback, &result);
-       if (!ret)
-               return 0;
-       if (ret < 0) {
-               send_va_buffer(fd, "%s\n", para_strerror(-ret));
-               return ret;
-       }
-       ret = send_buffer(fd, (char *)result.data);
-       free(result.data);
+               com_cpsi_callback, rc4_send_result, rc4c);
+       if (ret < 0)
+               rc4_send_va_buffer(rc4c, "%s\n", para_strerror(-ret));
        return ret;
 }
 
+void afs_stat_callback(int fd, const struct osl_object *query)
+{
+       int *parser_friendly = query->data;
+       char *buf = *parser_friendly?
+               parser_friendly_status_items : status_items;
+
+       if (!buf)
+               return;
+       pass_buffer_as_shm(buf, strlen(buf), &fd);
+}
+
+int send_afs_status(struct rc4_context *rc4c, int parser_friendly)
+{
+       struct osl_object query = {.data = &parser_friendly,
+               .size = sizeof(parser_friendly)};
+
+       return send_callback_request(afs_stat_callback, &query, rc4_send_result, rc4c);
+}
+
 /* TODO: optionally fix problems by removing offending rows */
 static int check_audio_file(struct osl_row *row, void *data)
 {
@@ -2310,52 +2464,61 @@ static int check_audio_file(struct osl_row *row, void *data)
        struct afs_info afsi;
        char *blob_name;
 
-       if (ret < 0) {
-               para_printf(pb, "%s\n", para_strerror(-ret));
-               return 1;
-       }
-       if (stat(path, &statbuf) < 0)
-               para_printf(pb, "%s: stat error (%s)\n", path, strerror(errno));
-       else {
-               if (!S_ISREG(statbuf.st_mode))
-                       para_printf(pb, "%s: not a regular file\n", path);
+       if (ret < 0)
+               return para_printf(pb, "%s\n", para_strerror(-ret));
+       if (stat(path, &statbuf) < 0) {
+               ret = para_printf(pb, "%s: stat error (%s)\n", path, strerror(errno));
+               if (ret < 0)
+                       return ret;
+       } else {
+               if (!S_ISREG(statbuf.st_mode)) {
+                       ret = para_printf(pb, "%s: not a regular file\n", path);
+                       if (ret < 0)
+                               return ret;
+               }
        }
        ret = get_afsi_of_row(row, &afsi);
-       if (ret < 0) {
-               para_printf(pb, "%s: %s\n", path, para_strerror(-ret));
-               return 1;
-       }
-       ret = lyr_get_name_by_id(afsi.lyrics_id, &blob_name);
        if (ret < 0)
-               para_printf(pb, "%s lyrics id %u: %s\n", path, afsi.lyrics_id,
+               return para_printf(pb, "%s: %s\n", path, para_strerror(-ret));
+       ret = lyr_get_name_by_id(afsi.lyrics_id, &blob_name);
+       if (ret < 0) {
+               ret = para_printf(pb, "%s lyrics id %u: %s\n", path, afsi.lyrics_id,
                        para_strerror(-ret));
+               if (ret < 0)
+                       return ret;
+       }
        ret = img_get_name_by_id(afsi.image_id, &blob_name);
        if (ret < 0)
-               para_printf(pb, "%s image id %u: %s\n", path, afsi.image_id,
+               ret = para_printf(pb, "%s image id %u: %s\n", path, afsi.image_id,
                        para_strerror(-ret));
-       return 1;
+       return ret;
 }
 
 /**
  * Check the audio file table for inconsistencies.
  *
+ * \param fd The afs socket.
  * \param query Unused.
- * \param result Contains message string upon return.
  *
  * This function always succeeds.
  *
  * \sa com_check().
  */
-int aft_check_callback(__a_unused const struct osl_object *query, struct osl_object *result)
+void aft_check_callback(int fd, __a_unused const struct osl_object *query)
 {
-       struct para_buffer pb = {.buf = NULL};
+       struct para_buffer pb = {
+               .max_size = SHMMAX,
+               .private_data = &fd,
+               .max_size_handler = pass_buffer_as_shm
+       };
+       int ret = para_printf(&pb, "checking audio file table...\n");
 
-       para_printf(&pb, "checking audio file table...\n");
+       if (ret < 0)
+               return;
        audio_file_loop(&pb, check_audio_file);
-       result->data = pb.buf;
-       result->size = pb.size;
-       return 1;
-
+       if (pb.offset)
+               pass_buffer_as_shm(pb.buf, pb.offset, &fd);
+       free(pb.buf);
 }
 
 /**
@@ -2369,6 +2532,10 @@ static void aft_close(void)
 {
        osl_close_table(audio_file_table, OSL_MARK_CLEAN);
        audio_file_table = NULL;
+       free(status_items);
+       status_items = NULL;
+       free(parser_friendly_status_items);
+       parser_friendly_status_items = NULL;
 }
 
 /**
@@ -2385,7 +2552,7 @@ static int aft_open(const char *dir)
        int ret;
 
        audio_file_table_desc.dir = dir;
-       ret = osl_open_table(&audio_file_table_desc, &audio_file_table);
+       ret = osl(osl_open_table(&audio_file_table_desc, &audio_file_table));
        if (ret >= 0) {
                unsigned num;
                osl_get_num_rows(audio_file_table, &num);
@@ -2394,7 +2561,7 @@ static int aft_open(const char *dir)
        }
        PARA_INFO_LOG("failed to open audio file table\n");
        audio_file_table = NULL;
-       if (ret >= 0 || is_errno(-ret, ENOENT))
+       if (ret >= 0 || ret == -OSL_ERRNO_TO_PARA_ERROR(E_OSL_NOENT))
                return 1;
        return ret;
 }
@@ -2402,7 +2569,7 @@ static int aft_open(const char *dir)
 static int aft_create(const char *dir)
 {
        audio_file_table_desc.dir = dir;
-       return osl_create_table(&audio_file_table_desc);
+       return osl(osl_create_table(&audio_file_table_desc));
 }
 
 static int clear_attribute(struct osl_row *row, void *data)
@@ -2426,12 +2593,16 @@ static int clear_attribute(struct osl_row *row, void *data)
 static int aft_event_handler(enum afs_events event, struct para_buffer *pb,
                void *data)
 {
+       int ret;
+
        switch(event) {
        case ATTRIBUTE_REMOVE: {
                const struct rmatt_event_data *red = data;
-               para_printf(pb, "clearing attribute %s (bit %u) from all "
+               ret = para_printf(pb, "clearing attribute %s (bit %u) from all "
                        "entries in the audio file table\n", red->name,
                        red->bitnum);
+               if (ret < 0)
+                       return ret;
                return audio_file_loop(data, clear_attribute);
                }
        default: