Merge branch 't/makefile_cleanups'
[paraslash.git] / audioc.c
1 /*
2 * Copyright (C) 2005-2011 Andre Noll <maan@systemlinux.org>
3 *
4 * Licensed under the GPL v2. For licencing details see COPYING.
5 */
6
7 /** \file audioc.c The client program used to connect to para_audiod. */
8
9 #include <regex.h>
10 #include <sys/types.h>
11
12 #include "audioc.cmdline.h"
13 #include "para.h"
14 #include "error.h"
15 #include "net.h"
16 #include "string.h"
17 #include "fd.h"
18 #include "version.h"
19
20 INIT_AUDIOC_ERRLISTS;
21
22 /** The gengetopt structure containing command line args. */
23 static struct audioc_args_info conf;
24
25 static int loglevel;
26 INIT_STDERR_LOGGING(loglevel);
27
28 static char *concat_args(unsigned argc, char * const *argv)
29 {
30 int i;
31 char *buf = NULL;
32
33 for (i = 0; i < argc; i++) {
34 buf = para_strcat(buf, argv[i]);
35 if (i != argc - 1)
36 buf = para_strcat(buf, "\n");
37 }
38 return buf;
39 }
40
41 static char *configfile_exists(void)
42 {
43 static char *config_file;
44 struct stat statbuf;
45
46 if (!config_file) {
47 char *home = para_homedir();
48 config_file = make_message("%s/.paraslash/audioc.conf", home);
49 free(home);
50 }
51 if (!stat(config_file, &statbuf))
52 return config_file;
53 return NULL;
54 }
55
56 /**
57 * The client program to connect to para_audiod.
58 *
59 * \param argc Usual argument count.
60 * \param argv Usual argument vector.
61 *
62 * It creates a temporary local socket in order to communicate with para_audiod.
63 * Authentication consists in sending a ucred buffer that contains the user id.
64 *
65 * Any output received through the local socket is sent to stdout.
66 *
67 * \return EXIT_SUCCESS or EXIT_FAILURE.
68 *
69 * \sa send_cred_buffer(), para_audioc(1), para_audiod(1).
70 */
71 int main(int argc, char *argv[])
72 {
73 int ret = -E_AUDIOC_SYNTAX, fd;
74 char *cf, *buf = NULL, *args;
75 size_t bufsize;
76
77 if (audioc_cmdline_parser(argc, argv, &conf))
78 goto out;
79 HANDLE_VERSION_FLAG("audioc", conf);
80 cf = configfile_exists();
81 if (cf) {
82 struct audioc_cmdline_parser_params params = {
83 .override = 0,
84 .initialize = 0,
85 .check_required = 0,
86 .check_ambiguity = 0
87 };
88 if (audioc_cmdline_parser_config_file(cf, &conf, &params)) {
89 fprintf(stderr, "parse error in config file\n");
90 exit(EXIT_FAILURE);
91 }
92 }
93 loglevel = get_loglevel_by_name(conf.loglevel_arg);
94 args = conf.inputs_num?
95 concat_args(conf.inputs_num, conf.inputs) :
96 para_strdup("stat");
97
98 if (conf.socket_given)
99 ret = connect_local_socket(conf.socket_arg);
100 else {
101 char *hn = para_hostname(), *socket_name = make_message(
102 "/var/paraslash/audiod_socket.%s", hn);
103 ret = connect_local_socket(socket_name);
104 free(hn);
105 free(socket_name);
106 }
107 if (ret < 0) {
108 PARA_EMERG_LOG("failed to connect to local socket\n");
109 goto out;
110 }
111 fd = ret;
112 ret = send_cred_buffer(fd, args);
113 if (ret < 0)
114 goto out;
115 bufsize = conf.bufsize_arg;
116 buf = para_malloc(bufsize);
117 do {
118 size_t n = ret = recv_bin_buffer(fd, buf, bufsize);
119 if (ret <= 0)
120 break;
121 ret = write_all(STDOUT_FILENO, buf, &n);
122 } while (ret >= 0);
123 out:
124 if (ret < 0)
125 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
126 return ret < 0? EXIT_FAILURE : EXIT_SUCCESS;
127 }