audiod: Implement help --long.
[paraslash.git] / audioc.c
index 5f6b5ae..d9478ab 100644 (file)
--- a/audioc.c
+++ b/audioc.c
@@ -1,8 +1,4 @@
-/*
- * Copyright (C) 2005-2014 Andre Noll <maan@systemlinux.org>
- *
- * Licensed under the GPL v2. For licencing details see COPYING.
- */
+/* Copyright (C) 2005 Andre Noll <maan@tuebingen.mpg.de>, see file COPYING. */
 
 /** \file audioc.c The client program used to connect to para_audiod. */
 
 #include <arpa/inet.h>
 #include <sys/un.h>
 #include <netdb.h>
-#include <stdbool.h>
 #include <signal.h>
+#include <lopsub.h>
+
+#include "audiod_cmd.lsg.h"
+#include "audioc.lsg.h"
 
-#include "audioc.cmdline.h"
 #include "para.h"
 #include "error.h"
 #include "net.h"
 #include "string.h"
 #include "fd.h"
-#include "ggo.h"
 #include "version.h"
 
-INIT_AUDIOC_ERRLISTS;
+/** Array of error strings. */
+DEFINE_PARA_ERRLIST;
 
-/** The gengetopt structure containing command line args. */
-static struct audioc_args_info conf;
 static char *socket_name;
+static struct lls_parse_result *lpr;
 
+#define CMD_PTR (lls_cmd(0, audioc_suite))
+#define OPT_RESULT(_name) \
+       (lls_opt_result(LSG_AUDIOC_PARA_AUDIOC_OPT_ ## _name, lpr))
+#define OPT_GIVEN(_name) (lls_opt_given(OPT_RESULT(_name)))
+#define OPT_STRING_VAL(_name) (lls_string_val(0, OPT_RESULT(_name)))
+#define OPT_UINT32_VAL(_name) (lls_uint32_val(0, OPT_RESULT(_name)))
 
 static int loglevel;
 INIT_STDERR_LOGGING(loglevel);
@@ -41,7 +44,8 @@ static char *concat_args(unsigned argc, char * const *argv)
        char *buf = NULL;
 
        for (i = 0; i < argc; i++) {
-               buf = para_strcat(buf, argv[i]);
+               const char *arg = argv? argv[i] : lls_input(i, lpr);
+               buf = para_strcat(buf, arg);
                if (i != argc - 1)
                        buf = para_strcat(buf, "\n");
        }
@@ -72,14 +76,13 @@ fail:
 #include "sched.h"
 #include "buffer_tree.h"
 #include "interactive.h"
-#include "audiod_completion.h"
 
 static struct sched sched;
 
 struct audioc_task {
        int fd;
        struct btr_node *btrn;
-       struct task task;
+       struct task *task;
 };
 
 static struct i9e_completer audiod_completers[];
@@ -94,14 +97,29 @@ I9E_DUMMY_COMPLETER(term);
 static void help_completer(struct i9e_completion_info *ci,
                struct i9e_completion_result *result)
 {
+       char *opts[] = {LSG_AUDIOD_CMD_HELP_OPTS, NULL};
+
+       if (ci->word[0] == '-') {
+               i9e_complete_option(opts, ci, result);
+               return;
+       }
        result->matches = i9e_complete_commands(ci->word, audiod_completers);
 }
 
+static void version_completer(struct i9e_completion_info *ci,
+               struct i9e_completion_result *cr)
+{
+       char *opts[] = {LSG_AUDIOD_CMD_VERSION_OPTS, NULL};
+
+       if (ci->word_num <= 2 && ci->word && ci->word[0] == '-')
+               i9e_complete_option(opts, ci, cr);
+}
+
 static void stat_completer(struct i9e_completion_info *ci,
                struct i9e_completion_result *cr)
 {
-       char *sia[] = {STATUS_ITEM_ARRAY NULL};
-       char *opts[] = {"-p", NULL};
+       char *sia[] = {STATUS_ITEMS NULL};
+       char *opts[] = {LSG_AUDIOD_CMD_STAT_OPTS, NULL};
 
        if (ci->word_num <= 2 && ci->word && ci->word[0] == '-')
                i9e_complete_option(opts, ci, cr);
@@ -112,18 +130,21 @@ static void stat_completer(struct i9e_completion_info *ci,
 static void grab_completer(struct i9e_completion_info *ci,
                struct i9e_completion_result *cr)
 {
-       char *opts[] = {"-ms", "-ms", "-ma", "-p=", "-n=", "-o", NULL};
+       char *opts[] = {LSG_AUDIOD_CMD_GRAB_OPTS, NULL};
        i9e_complete_option(opts, ci, cr);
 }
 
 static struct i9e_completer audiod_completers[] = {
-       AUDIOD_COMPLETERS
+#define LSG_AUDIOD_CMD_CMD(_name) {.name = #_name, \
+       .completer = _name ## _completer}
+       LSG_AUDIOD_CMD_SUBCOMMANDS
+#undef LSG_AUDIOD_CMD_CMD
        {.name = NULL}
 };
 
-static void audioc_pre_select(struct sched *s, struct task *t)
+static void audioc_pre_select(struct sched *s, void *context)
 {
-       struct audioc_task *at = container_of(t, struct audioc_task, task);
+       struct audioc_task *at = context;
        int ret = btr_node_status(at->btrn, 0, BTR_NT_ROOT);
 
        if (ret < 0)
@@ -131,18 +152,20 @@ static void audioc_pre_select(struct sched *s, struct task *t)
        para_fd_set(at->fd, &s->rfds, &s->max_fileno);
 }
 
-static int audioc_post_select(struct sched *s, struct task *t)
+static int audioc_post_select(struct sched *s, void *context)
 {
        char *buf = NULL;
-       struct audioc_task *at = container_of(t, struct audioc_task, task);
+       struct audioc_task *at = context;
        int ret = btr_node_status(at->btrn, 0, BTR_NT_ROOT);
+       size_t bufsize;
 
        if (ret < 0)
                goto out;
        if (!FD_ISSET(at->fd, &s->rfds))
                return 0;
-       buf = para_malloc(conf.bufsize_arg);
-       ret = recv_bin_buffer(at->fd, buf, conf.bufsize_arg);
+       bufsize = PARA_MAX(1024U, OPT_UINT32_VAL(BUFSIZE));
+       buf = para_malloc(bufsize);
+       ret = recv_bin_buffer(at->fd, buf, bufsize);
        PARA_DEBUG_LOG("recv: %d\n", ret);
        if (ret == 0)
                ret = -E_AUDIOC_EOF;
@@ -159,48 +182,42 @@ out:
        return ret;
 }
 
-static struct audioc_task audioc_task = {
-       .task = {
-               .pre_select = audioc_pre_select,
-               .post_select = audioc_post_select,
-               .status = "audioc task"
-       },
-}, *at = &audioc_task;
+static struct audioc_task audioc_task, *at = &audioc_task;
 
 static int audioc_i9e_line_handler(char *line)
 {
-       char *args = NULL;
-       int ret;
+       int argc, ret;
+       char *args, **argv;
 
        PARA_DEBUG_LOG("line: %s\n", line);
-       ret = create_argv(line, " ", &conf.inputs);
+       ret = create_argv(line, " ", &argv);
        if (ret < 0)
                return ret;
-       conf.inputs_num = ret;
-       args = concat_args(conf.inputs_num, conf.inputs);
-       free_argv(conf.inputs);
+       argc = ret;
+       args = concat_args(argc, argv);
+       free_argv(argv);
        if (!args)
                return 0;
-       conf.inputs_num = 0; /* required for audioc_cmdline_parser_free() */
        ret = connect_audiod(socket_name, args);
+       free(args);
        if (ret < 0)
-               goto out;
+               return ret;
        at->fd = ret;
        ret = mark_fd_nonblocking(at->fd);
        if (ret < 0)
                goto close;
-       free(args);
-       args = NULL;
        at->btrn = btr_new_node(&(struct btr_node_description)
                EMBRACE(.name = "audioc line handler"));
-       at->task.error = 0;
-       register_task(&sched, &at->task);
+       at->task = task_register(&(struct task_info) {
+               .name = "audioc",
+               .pre_select = audioc_pre_select,
+               .post_select = audioc_post_select,
+               .context = at,
+       }, &sched);
        i9e_attach_to_stdout(at->btrn);
        return 1;
 close:
        close(at->fd);
-out:
-       free(args);
        return ret;
 }
 
@@ -216,9 +233,10 @@ __noreturn static void interactive_session(void)
                .loglevel = loglevel,
                .completers = audiod_completers,
        };
+
        PARA_NOTICE_LOG("\n%s\n", version_text("audioc"));
-       if (conf.history_file_given)
-               history_file = para_strdup(conf.history_file_arg);
+       if (OPT_GIVEN(HISTORY_FILE))
+               history_file = para_strdup(OPT_STRING_VAL(HISTORY_FILE));
        else {
                char *home = para_homedir();
                history_file = make_message("%s/.paraslash/audioc.history",
@@ -239,11 +257,12 @@ __noreturn static void interactive_session(void)
                goto out;
        para_log = i9e_log;
        ret = schedule(&sched);
+       sched_shutdown(&sched);
        i9e_close();
        para_log = stderr_log;
 out:
        free(history_file);
-       audioc_cmdline_parser_free(&conf);
+       free(socket_name);
        if (ret < 0)
                PARA_ERROR_LOG("%s\n", para_strerror(-ret));
        exit(ret < 0? EXIT_FAILURE : EXIT_SUCCESS);
@@ -274,24 +293,29 @@ __noreturn static void print_completions(void)
 static char *configfile_exists(void)
 {
        char *config_file;
-       struct stat statbuf;
        char *home = para_homedir();
 
        config_file = make_message("%s/.paraslash/audioc.conf", home);
        free(home);
-       if (!stat(config_file, &statbuf))
+       if (file_exists(config_file))
                return config_file;
        free(config_file);
        return NULL;
 }
 
-__noreturn static void print_help_and_die(void)
+static void handle_help_flag(void)
 {
-       struct ggo_help h = DEFINE_GGO_HELP(audioc);
-       bool d = conf.detailed_help_given;
+       char *help;
 
-       ggo_print_help(&h, d? GPH_STANDARD_FLAGS_DETAILED : GPH_STANDARD_FLAGS);
-       exit(0);
+       if (OPT_GIVEN(DETAILED_HELP))
+               help = lls_long_help(CMD_PTR);
+       else if (OPT_GIVEN(HELP))
+               help = lls_short_help(CMD_PTR);
+       else
+               return;
+       printf("%s\n", help);
+       free(help);
+       exit(EXIT_SUCCESS);
 }
 
 /**
@@ -308,58 +332,83 @@ __noreturn static void print_help_and_die(void)
  *
  * \return EXIT_SUCCESS or EXIT_FAILURE.
  *
- * \sa send_cred_buffer(), para_audioc(1), para_audiod(1).
+ * \sa \ref send_cred_buffer(), para_audioc(1), para_audiod(1).
  */
 int main(int argc, char *argv[])
 {
+       const struct lls_command *cmd = CMD_PTR;
        int ret, fd;
-       char *cf, *buf = NULL, *args = NULL;
+       char *cf = NULL, *buf, *args, *errctx = NULL;
        size_t bufsize;
+       struct lls_parse_result *lpr1, *lpr2, *lpr3;
+       unsigned num_inputs;
 
-       audioc_cmdline_parser(argc, argv, &conf);
-       loglevel = get_loglevel_by_name(conf.loglevel_arg);
-       version_handle_flag("audioc", conf.version_given);
-       if (conf.help_given || conf.detailed_help_given)
-               print_help_and_die();
+       ret = lls(lls_parse(argc, argv, cmd, &lpr1, &errctx));
+       if (ret < 0)
+               goto fail;
+       lpr = lpr1;
+       loglevel = OPT_UINT32_VAL(LOGLEVEL);
+       version_handle_flag("audioc", OPT_GIVEN(VERSION));
+       handle_help_flag();
        cf = configfile_exists();
        if (cf) {
-               struct audioc_cmdline_parser_params params = {
-                       .override = 0,
-                       .initialize = 0,
-                       .check_required = 0,
-                       .check_ambiguity = 0,
-                       .print_errors = 1,
-
-               };
-               audioc_cmdline_parser_config_file(cf, &conf, &params);
-               free(cf);
-               loglevel = get_loglevel_by_name(conf.loglevel_arg);
+               void *map;
+               size_t sz;
+               int cf_argc;
+               char **cf_argv;
+               ret = mmap_full_file(cf, O_RDONLY, &map, &sz, NULL);
+               if (ret != -E_EMPTY) {
+                       if (ret < 0)
+                               goto out;
+                       ret = lls(lls_convert_config(map, sz, NULL, &cf_argv,
+                               &errctx));
+                       para_munmap(map, sz);
+                       if (ret < 0) {
+                               PARA_ERROR_LOG("syntax error in %s\n", cf);
+                               goto out;
+                       }
+                       cf_argc = ret;
+                       ret = lls(lls_parse(cf_argc, cf_argv, cmd, &lpr2,
+                               &errctx));
+                       lls_free_argv(cf_argv);
+                       if (ret < 0) {
+                               PARA_ERROR_LOG("parse error in %s\n", cf);
+                               goto out;
+                       }
+                       ret = lls(lls_merge(lpr1, lpr2, cmd, &lpr3, &errctx));
+                       lls_free_parse_result(lpr2, cmd);
+                       if (ret < 0)
+                               goto out;
+                       lls_free_parse_result(lpr1, cmd);
+                       lpr = lpr3;
+                       loglevel = OPT_UINT32_VAL(LOGLEVEL);
+               }
        }
-       if (conf.socket_given)
-               socket_name = para_strdup(conf.socket_arg);
+       if (OPT_GIVEN(COMPLETE))
+               print_completions();
+       if (OPT_GIVEN(SOCKET))
+               socket_name = para_strdup(OPT_STRING_VAL(SOCKET));
        else {
                char *hn = para_hostname();
                socket_name = make_message("/var/paraslash/audiod_socket.%s",
                        hn);
                free(hn);
        }
-
-       if (conf.complete_given)
-               print_completions();
-
-       if (conf.inputs_num == 0)
+       num_inputs = lls_num_inputs(lpr);
+       if (num_inputs == 0)
                interactive_session();
-       args = concat_args(conf.inputs_num, conf.inputs);
 
+       args = concat_args(num_inputs, NULL);
        ret = connect_audiod(socket_name, args);
        free(socket_name);
+       free(args);
        if (ret < 0)
                goto out;
        fd = ret;
        ret = mark_fd_blocking(STDOUT_FILENO);
        if (ret < 0)
                goto out;
-       bufsize = conf.bufsize_arg;
+       bufsize = PARA_MAX(1024U, OPT_UINT32_VAL(BUFSIZE));
        buf = para_malloc(bufsize);
        do {
                size_t n = ret = recv_bin_buffer(fd, buf, bufsize);
@@ -367,9 +416,14 @@ int main(int argc, char *argv[])
                        break;
                ret = write_all(STDOUT_FILENO, buf, n);
        } while (ret >= 0);
-out:
        free(buf);
-       free(args);
+out:
+       lls_free_parse_result(lpr, cmd);
+       free(cf);
+fail:
+       if (errctx)
+               PARA_ERROR_LOG("%s\n", errctx);
+       free(errctx);
        if (ret < 0)
                PARA_ERROR_LOG("%s\n", para_strerror(-ret));
        return ret < 0? EXIT_FAILURE : EXIT_SUCCESS;