+/*
+ * Copyright (C) 1997-2008 Andre Noll <maan@systemlinux.org>
+ *
+ * Licensed under the GPL v2. For licencing details see COPYING.
+ */
+
+/** \file attribute.c Attribute handling functions. */
#include "para.h"
#include "error.h"
+#include "string.h"
#include "afh.h"
#include "afs.h"
-#include "string.h"
+#include "net.h"
+#include "ipc.h"
-static void *attribute_table;
+static struct osl_table *attribute_table;
static int greatest_att_bitnum;
+/** The columns of the attribute table. */
+enum attribute_table_columns {
+ /** The bit number (0-63). */
+ ATTCOL_BITNUM,
+ /** The name of the attribute. */
+ ATTCOL_NAME,
+ /** Number of columns in this table. */
+ NUM_ATT_COLUMNS
+};
+
static int char_compare(const struct osl_object *obj1, const struct osl_object *obj2)
{
const unsigned char *c1 = (const unsigned char*)obj1->data;
return 0;
}
-enum attribute_table_columns {ATTCOL_BITNUM, ATTCOL_NAME, NUM_ATT_COLUMNS};
-
static struct osl_column_description att_cols[] = {
[ATTCOL_BITNUM] = {
.storage_type = OSL_MAPPED_STORAGE,
}
};
-static const struct osl_table_description attribute_table_desc = {
- .dir = DATABASE_DIR,
+static struct osl_table_description attribute_table_desc = {
.name = "attributes",
.num_columns = NUM_ATT_COLUMNS,
.flags = 0,
return;
}
} while (c--);
- PARA_INFO_LOG("%s\n", "no attributes");
+ PARA_INFO_LOG("no attributes\n");
greatest_att_bitnum = -E_NO_ATTRIBUTES;
}
+/**
+ * Retrieve the identifier (number) of an attribute.
+ *
+ * \param att_name The name of the attribute.
+ * \param bitnum Result pointer.
+ *
+ * \return Positive on success, negative on errors.
+ */
int get_attribute_bitnum_by_name(const char *att_name, unsigned char *bitnum)
{
struct osl_object obj = {.data = (char *)att_name,
return 1;
}
-#define LAA_FLAG_ALPHA 1
-#define LAA_FLAG_LONG 2
+/**
+ * Flags used by the lsatt command.
+ *
+ * \param \sa com_lsatt().
+ */
+enum lsatt_flags {
+ /** Whether "-a" was given for the lsatt command. */
+ LSATT_FLAG_SORT_BY_ID = 1,
+ /** Whether "-l" was given for the lsatt command. */
+ LSATT_FLAG_LONG = 2,
+ /** Reverse sort order. */
+ LSATT_FLAG_REVERSE = 4
+};
-struct private_laa_data {
- int fd;
+/** Data passed to the action function of lsatt */
+struct lsatt_action_data {
+ /** The result buffer. */
+ struct para_buffer pb;
+ /** The given flags for the lsatt command. */
unsigned flags;
};
-static int log_attribute(struct osl_row *row, void *private_data)
+static int print_attribute(struct osl_table *table, struct osl_row *row,
+ const char *name, void *data)
{
- struct private_laa_data *pld = private_data;
- int ret;
- struct osl_object name_obj, bitnum_obj;
-
- ret = osl_get_object(attribute_table, row, ATTCOL_NAME, &name_obj);
- if (ret < 0)
+ struct lsatt_action_data *laad = data;
+ struct osl_object bitnum_obj;
+ int ret, ret2;
+
+ if (!(laad->flags & LSATT_FLAG_LONG))
+ return para_printf(&laad->pb, "%s\n", name);
+ ret = osl_get_object(table, row, ATTCOL_BITNUM, &bitnum_obj);
+ if (ret < 0) {
+ ret2 = para_printf(&laad->pb, "%s: %s\n", name, para_strerror(-ret));
return ret;
- if (!(pld->flags & LAA_FLAG_LONG)) {
- printf("%s\n", (char *)name_obj.data);
- return 1;
}
- ret = osl_get_object(attribute_table, row, ATTCOL_BITNUM, &bitnum_obj);
- if (ret < 0)
- return ret;
- printf("%u\t%s\n", *(unsigned char*)bitnum_obj.data,
- (char *)name_obj.data);
- return 1;
+ return para_printf(&laad->pb, "%u\t%s\n", *(unsigned char*)bitnum_obj.data,
+ name);
}
-int com_lsatt(int fd, int argc, const char **argv)
+static void com_lsatt_callback(int fd, const struct osl_object *query)
{
- struct private_laa_data pld = {.fd = fd, .flags = 0};
- int i;
+ struct lsatt_action_data laad = {
+ .flags = *(unsigned *) query->data,
+ .pb = {
+ .max_size = SHMMAX,
+ .private_data = &fd,
+ .max_size_handler = pass_buffer_as_shm
+ }
+
+ };
+ struct pattern_match_data pmd = {
+ .table = attribute_table,
+ .loop_col_num = ATTCOL_BITNUM,
+ .match_col_num = ATTCOL_NAME,
+ .patterns = {.data = (char *)query->data + sizeof(laad.flags),
+ .size = query->size - sizeof(laad.flags)},
+ .pm_flags = PM_NO_PATTERN_MATCHES_EVERYTHING,
+ .data = &laad,
+ .action = print_attribute
+ };
+ if (laad.flags & LSATT_FLAG_SORT_BY_ID)
+ pmd.loop_col_num = ATTCOL_NAME;
+ if (laad.flags & LSATT_FLAG_REVERSE)
+ pmd.pm_flags |= PM_REVERSE_LOOP;
+ for_each_matching_row(&pmd);
+ if (laad.pb.offset)
+ pass_buffer_as_shm(laad.pb.buf, laad.pb.offset, &fd);
+ free(laad.pb.buf);
+}
+
+int com_lsatt(int fd, int argc, char * const * const argv)
+{
+ unsigned flags = 0;
+ struct osl_object options = {.data = &flags, .size = sizeof(flags)};
+ int ret, i;
for (i = 1; i < argc; i++) {
const char *arg = argv[i];
i++;
break;
}
- if (!strcmp(arg, "-a")) {
- pld.flags |= LAA_FLAG_ALPHA;
+ if (!strcmp(arg, "-i")) {
+ flags |= LSATT_FLAG_SORT_BY_ID;
continue;
}
if (!strcmp(arg, "-l")) {
- pld.flags |= LAA_FLAG_LONG;
+ flags |= LSATT_FLAG_LONG;
+ continue;
+ }
+ if (!strcmp(arg, "-r")) {
+ flags |= LSATT_FLAG_REVERSE;
continue;
}
}
- if (argc > i)
- return -E_ATTR_SYNTAX;
- if (pld.flags & LAA_FLAG_ALPHA)
- return osl_rbtree_loop(attribute_table, ATTCOL_NAME,
- &pld, log_attribute);
- return osl_rbtree_loop(attribute_table, ATTCOL_BITNUM,
- &pld, log_attribute);
+ ret = send_option_arg_callback_request(&options, argc - i, argv + i,
+ com_lsatt_callback, send_result, &fd);
+ if (!ret) {
+ if (argc > 1)
+ ret = send_va_buffer(fd, "no matches\n");
+ } else if (ret < 0)
+ send_va_buffer(fd, "%s\n", para_strerror(-ret));
+ return ret;
}
-static int com_setatt_callback(const struct osl_object *query,
- __a_unused struct osl_object *result)
+static void com_setatt_callback(__a_unused int fd, const struct osl_object *query)
{
char *p;
uint64_t add_mask = 0, del_mask = 0;
char c;
len = strlen(p);
+ ret = -E_ATTR_SYNTAX;
if (!*p)
- return -E_ATTR_SYNTAX;
+ goto out;
c = p[len - 1];
if (c != '+' && c != '-')
break;
obj.size = len + 1;
ret = osl_get_row(attribute_table, ATTCOL_NAME, &obj, &row);
if (ret < 0)
- return ret;
+ goto out;
ret = osl_get_object(attribute_table, row, ATTCOL_BITNUM,
&obj);
if (ret < 0)
- return ret;
+ goto out;
if (c == '+')
add_mask |= (1UL << *(unsigned char *)obj.data);
else
del_mask |= (1UL << *(unsigned char *)obj.data);
}
+ ret = -E_ATTR_SYNTAX;
if (!add_mask && !del_mask)
- return -E_ATTR_SYNTAX;
- PARA_DEBUG_LOG("masks: %llx:%llx\n", add_mask, del_mask);
+ goto out;
+ PARA_DEBUG_LOG("masks: %llx:%llx\n",(long long unsigned)add_mask,
+ (long long unsigned)del_mask);
for (; p < (char *)query->data + query->size; p += len + 1) { /* TODO: fnmatch */
struct afs_info old_afsi, new_afsi;
- struct osl_row *aft_row;
+ struct afsi_change_event_data aced = {.old_afsi = &old_afsi};
len = strlen(p);
- ret = aft_get_row_of_path(p, &aft_row);
+ ret = aft_get_row_of_path(p, &aced.aft_row);
if (ret < 0)
- return ret;
- ret = get_afsi_object_of_row(p, &obj);
+ goto out;
+ ret = get_afsi_object_of_row(aced.aft_row, &obj);
if (ret < 0)
- return ret;
+ goto out;
ret = load_afsi(&old_afsi, &obj);
if (ret < 0)
- return ret;
+ goto out;
new_afsi = old_afsi;
new_afsi.attributes |= add_mask;
new_afsi.attributes &= ~del_mask;
save_afsi(&new_afsi, &obj); /* in-place update */
- ret = mood_update_audio_file(aft_row, &old_afsi);
- if (ret < 0)
- return ret;
+ afs_event(AFSI_CHANGE, NULL, &aced);
}
- return 1;
+out:
+ if (ret < 0)
+ PARA_NOTICE_LOG("%s\n", para_strerror(-ret));
}
-int com_setatt(__a_unused int fd, int argc, const char **argv)
+int com_setatt(__a_unused int fd, int argc, char * const * const argv)
{
- if (argc < 2)
+ if (argc < 3)
return -E_ATTR_SYNTAX;
- return send_standard_callback_request(argc, argv, com_setatt_callback,
- NULL);
+ return send_standard_callback_request(argc - 1, argv + 1, com_setatt_callback,
+ NULL, NULL);
}
-/* TODO: make it faster by only extracting the attribute member from afsi */
-static int logical_and_attribute(struct osl_row *aft_row, void *attribute_ptr)
-{
- struct afs_info afsi;
- uint64_t *att = attribute_ptr;
- struct osl_object obj;
- int ret = get_afsi_object_of_row(aft_row, &obj);
- if (ret < 0)
- return ret;
- ret = load_afsi(&afsi, &obj);
- if (ret < 0)
- return ret;
- afsi.attributes &= *att;
- save_afsi(&afsi, &obj);
- return 1;
-}
+struct addatt_event_data {
+ const char *name;
+ unsigned char bitnum;
+};
-static int com_addatt_callback(const struct osl_object *query,
- __a_unused struct osl_object *result)
+
+static void com_addatt_callback(int fd, const struct osl_object *query)
{
char *p = query->data;
- uint64_t atts_added = 0;
- int ret;
+ int ret = 1, ret2 = 0;
+ struct para_buffer pb = {
+ .max_size = SHMMAX,
+ .private_data = &fd,
+ .max_size_handler = pass_buffer_as_shm
+ };
+ size_t len;
- while (p < (char *)query->data + query->size) {
+ for (p = query->data; p < (char *)query->data + query->size; p += len + 1) {
struct osl_object objs[NUM_ATT_COLUMNS];
struct osl_row *row;
unsigned char bitnum;
+ len = strlen(p);
+ struct addatt_event_data aed;
- objs[ATTCOL_BITNUM].size = 1;
- objs[ATTCOL_NAME].data = p;
- objs[ATTCOL_NAME].size = strlen(p) + 1;
- ret = osl_get_row(attribute_table, ATTCOL_NAME,
- &objs[ATTCOL_NAME], &row); /* expected to fail */
- if (ret >= 0)
- return -E_ATTR_EXISTS;
+ if (!len || p[len - 1] == '-' || p[len - 1] == '+') {
+ ret2 = para_printf(&pb, "invalid attribute name: %s\n", p);
+ if (ret2 < 0)
+ goto out;
+ continue;
+ }
+ ret = get_attribute_bitnum_by_name(p, &bitnum);
+ if (ret >= 0) {
+ ret2 = para_printf(&pb, "attribute \"%s\" already exists\n", p);
+ if (ret2 < 0)
+ goto out;
+ continue;
+ }
if (ret != -E_RB_KEY_NOT_FOUND) /* error */
- return ret;
- /* find smallest non-used attribute */
+ goto out;
+ objs[ATTCOL_BITNUM].size = 1;
+ /* find smallest unused attribute */
for (bitnum = 0; bitnum < 64; bitnum++) {
objs[ATTCOL_BITNUM].data = &bitnum;
ret = osl_get_row(attribute_table, ATTCOL_BITNUM,
if (ret == -E_RB_KEY_NOT_FOUND)
break; /* this bitnum is unused, use it */
if (ret < 0) /* error */
- return ret;
+ goto out;
/* this bit is already in use, try next bit */
}
- if (bitnum == 64)
- return -E_ATTR_TABLE_FULL;
+ if (bitnum == 64) {
+ ret = -E_ATT_TABLE_FULL;
+ goto out;
+ }
+ objs[ATTCOL_NAME].data = p;
+ objs[ATTCOL_NAME].size = len + 1;
ret = osl_add_row(attribute_table, objs);
if (ret < 0)
- return ret;
+ goto out;
+ aed.name = p;
+ aed.bitnum = bitnum;
+ afs_event(ATTRIBUTE_ADD, &pb, &aed);
greatest_att_bitnum = PARA_MAX(greatest_att_bitnum, bitnum);
- atts_added |= 1 << bitnum;
- p += strlen(p) + 1;
}
- if (!atts_added)
- return 1;
- atts_added = ~atts_added;
- ret = audio_file_loop(&atts_added, logical_and_attribute);
- if (ret < 0)
- return ret;
- find_greatest_att_bitnum();
- return mood_reload();
+out:
+ if (ret < 0 && ret2 >= 0)
+ ret = para_printf(&pb, "%s: %s\n", p, para_strerror(-ret));
+ if (pb.offset)
+ pass_buffer_as_shm(pb.buf, pb.offset, &fd);
+ free(pb.buf);
}
-int com_addatt(__a_unused int fd, int argc, const char **argv)
+int com_addatt(int fd, int argc, char * const * const argv)
{
+ int ret;
+
if (argc < 2)
return -E_ATTR_SYNTAX;
- return send_standard_callback_request(argc, argv, com_addatt_callback,
- NULL);
+ ret = send_standard_callback_request(argc - 1, argv + 1, com_addatt_callback,
+ send_result, &fd);
+ if (ret < 0)
+ send_va_buffer(fd, "%s\n", para_strerror(-ret));
+ return ret;
}
-static int com_rmatt_callback(const struct osl_object *query,
- __a_unused struct osl_object *result)
+static void com_mvatt_callback(int fd, const struct osl_object *query)
{
- char *p = query->data;
- int ret, atts_removed = 0;
- while (p < (char *)query->data + query->size) {
- struct osl_object obj = {
- .data = p,
- .size = strlen(p) + 1
- };
- struct osl_row *row;
- ret = osl_get_row(attribute_table, ATTCOL_NAME,
- &obj, &row);
- if (ret < 0)
- return ret;
- ret = osl_del_row(attribute_table, row);
- if (ret < 0)
- return ret;
- atts_removed++;
- p += strlen(p) + 1;
- }
- find_greatest_att_bitnum();
- if (!atts_removed)
- return 1;
- return mood_reload();
+ char *old = query->data;
+ size_t size = strlen(old) + 1;
+ char *new = old + size;
+ struct osl_object obj = {.data = old, .size = size};
+ struct osl_row *row;
+ struct para_buffer pb = {
+ .max_size = SHMMAX,
+ .private_data = &fd,
+ .max_size_handler = pass_buffer_as_shm
+ };
+ int ret;
+
+ ret = osl_get_row(attribute_table, ATTCOL_NAME, &obj, &row);
+ if (ret < 0)
+ goto out;
+ obj.data = new;
+ obj.size = strlen(new) + 1;
+ ret = osl_update_object(attribute_table, row, ATTCOL_NAME, &obj);
+out:
+ if (ret < 0)
+ ret = para_printf(&pb, "%s\n", para_strerror(-ret));
+ else
+ afs_event(ATTRIBUTE_RENAME, &pb, NULL);
+ if (pb.offset)
+ pass_buffer_as_shm(pb.buf, pb.offset, &fd);
+ free(pb.buf);
+}
+
+int com_mvatt(int fd, int argc, char * const * const argv)
+{
+ int ret;
+
+ if (argc != 3)
+ return -E_ATTR_SYNTAX;
+ ret = send_standard_callback_request(argc - 1, argv + 1, com_mvatt_callback,
+ send_result, &fd);
+ if (ret < 0)
+ send_va_buffer(fd, "%s\n", para_strerror(-ret));
+ return ret;
+}
+
+/** Data passed to the action handler of com_rmatt(). */
+struct remove_attribute_action_data {
+ /** Message buffer. */
+ struct para_buffer pb;
+ /** Numver of attributes removed. */
+ int num_removed;
+ /** Bitwise "or" of the removed attributes. */
+ uint64_t mask_of_removed_atts;
+};
+
+static int remove_attribute(struct osl_table *table, struct osl_row *row,
+ const char *name, void *data)
+{
+ struct remove_attribute_action_data *raad = data;
+ int ret;
+ struct rmatt_event_data red = {.name = name};
+
+ ret = get_attribute_bitnum_by_name(name, &red.bitnum);
+ if (ret < 0)
+ return para_printf(&raad->pb, "%s: %s\n", name, para_strerror(-ret));
+ ret = osl_del_row(table, row);
+ if (ret < 0)
+ return para_printf(&raad->pb, "%s: %s\n", name, para_strerror(-ret));
+ ret = para_printf(&raad->pb, "removed attribute %s\n", name);
+ raad->num_removed++;
+ raad->mask_of_removed_atts |= (1 << red.bitnum);
+ afs_event(ATTRIBUTE_REMOVE, &raad->pb, &red);
+ return ret;
}
-int com_rmatt(__a_unused int fd, int argc, const char **argv)
+static void com_rmatt_callback(int fd, const struct osl_object *query)
{
+ struct remove_attribute_action_data raad = {
+ .num_removed = 0,
+ .pb = {
+ .max_size = SHMMAX,
+ .private_data = &fd,
+ .max_size_handler = pass_buffer_as_shm
+ }
+ };
+ int ret, ret2 = 0;
+ struct pattern_match_data pmd = {
+ .table = attribute_table,
+ .patterns = *query,
+ .loop_col_num = ATTCOL_BITNUM,
+ .match_col_num = ATTCOL_NAME,
+ .data = &raad,
+ .action = remove_attribute
+ };
+ ret = for_each_matching_row(&pmd);
+ if (ret < 0)
+ ret2 = para_printf(&raad.pb, "%s\n", para_strerror(-ret));
+ else if (!raad.num_removed)
+ ret2 = para_printf(&raad.pb, "no match -- nothing removed\n");
+ if (ret2 >= 0 && raad.pb.offset)
+ pass_buffer_as_shm(raad.pb.buf, raad.pb.offset, &fd);
+ free(raad.pb.buf);
+}
+
+int com_rmatt(int fd, int argc, char * const * const argv)
+{
+ int ret;
+
if (argc < 2)
return -E_ATTR_SYNTAX;
- return send_standard_callback_request(argc, argv, com_rmatt_callback,
- NULL);
+ ret = send_standard_callback_request(argc - 1, argv + 1, com_rmatt_callback,
+ send_result, &fd);
+ if (ret < 0)
+ send_va_buffer(fd, "%s\n", para_strerror(-ret));
+ return ret;
}
-void get_attribute_bitmap(uint64_t *atts, char *buf)
+/**
+ * Return a binary representation of the given attribute value.
+ *
+ * \param atts Pointer to the attribute value.
+ * \param buf Result.
+ *
+ * This function prints a string of at most 64 characters plus the terminating
+ * \p NULL character into \a buf which must be provided by the caller and at
+ * least 65 bytes long. The "x" character is used for set attributes and "-" is
+ * used for unset attributes.
+ *
+ * In practice, not all 64 attributes are defined. In this case, the function
+ * only prints \a N + 1 charaters where \a N is the greatest id of a defined
+ * attribute.
+ */
+void get_attribute_bitmap(const uint64_t *atts, char *buf)
{
int i;
const uint64_t one = 1;
buf[greatest_att_bitnum - i] = (*atts & (one << i))? 'x' : '-';
buf[i] = '\0';
}
+
/**
* Get a string containing the set attributes in text form.
*
const uint64_t one = 1;
*text = NULL;
- if (greatest_att_bitnum < 0) /* no attributes available */
+ if (greatest_att_bitnum < 0) { /* no attributes available */
+ *text = para_strdup("(no attributes available)");
return 1;
+ }
for (i = 0; i <= greatest_att_bitnum; i++) {
unsigned char bn = i;
struct osl_object obj = {.data = &bn, .size = 1};
return ret;
}
-void attribute_shutdown(enum osl_close_flags flags)
+/**
+ * Close the attribute table.
+ *
+ * \sa osl_close_table().
+ */
+void attribute_close(void)
{
- osl_close_table(attribute_table, flags);
+ osl_close_table(attribute_table, OSL_MARK_CLEAN);
+ attribute_table = NULL;
}
-int attribute_init(struct table_info *ti)
+/**
+ * Open the attribute table.
+ *
+ * \param ti Gets initialized by this function.
+ * \param db The database directory.
+ *
+ * \return Positive on success, negative on errors.
+ *
+ * \sa osl_open_table().
+ */
+static int attribute_open(const char *dir)
{
int ret;
- ti->desc = &attribute_table_desc;
- ret = osl_open_table(ti->desc, &ti->table);
+ attribute_table_desc.dir = dir;
+ ret = osl_open_table(&attribute_table_desc, &attribute_table);
greatest_att_bitnum = -1; /* no atts available */
if (ret >= 0) {
- attribute_table = ti->table;
find_greatest_att_bitnum();
return ret;
}
attribute_table = NULL;
- if (ret == -E_NOENT)
+ if (ret >= 0 || is_errno(-ret, ENOENT))
return 1;
return ret;
}
+
+static int attribute_create(const char *dir)
+{
+ attribute_table_desc.dir = dir;
+ return osl_create_table(&attribute_table_desc);
+}
+
+
+void attribute_init(struct afs_table *t)
+{
+ t->name = attribute_table_desc.name;
+ t->open = attribute_open;
+ t->close = attribute_close;
+ t->create = attribute_create;
+}
projects / paraslash.git / blobdiff