Fix some typos.
[paraslash.git] / audioc.c
1 /*
2 * Copyright (C) 2005-2007 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 <sys/types.h>
10 #include <dirent.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
19 INIT_AUDIOC_ERRLISTS;
20
21 /** the gengetopt structure containing command line args */
22 struct audioc_args_info conf;
23
24 INIT_STDERR_LOGGING(conf.loglevel_arg);
25
26 static char *concat_args(unsigned argc, char * const *argv)
27 {
28 int i; char *buf = NULL;
29 for (i = 0; i < argc; i++) {
30 buf = para_strcat(buf, argv[i]);
31 if (i != argc - 1)
32 buf = para_strcat(buf, "\n");
33 }
34 return buf;
35 }
36
37 static char *configfile_exists(void)
38 {
39 static char *config_file;
40 struct stat statbuf;
41
42
43 if (!config_file) {
44 char *home = para_homedir();
45 config_file = make_message("%s/.paraslash/audioc.conf", home);
46 free(home);
47 }
48 if (!stat(config_file, &statbuf))
49 return config_file;
50 return NULL;
51 }
52
53 /**
54 * the client program to connect to para_audiod
55 *
56 * \param argc usual argument count
57 * \param argv usual argument vector
58 *
59 * It creates a temporary local socket in order to communicate with para_audiod.
60 * Authentication consists in sending a ucred buffer that contains the user id.
61 *
62 * Any output received through the local socket is sent to stdout.
63 *
64 * \return EXIT_SUCCESS or EXIT_FAILURE
65 *
66 * \sa send_cred_buffer(), para_audioc(1), para_audiod(1).
67 */
68 int main(int argc, char *argv[])
69 {
70 int ret = -E_AUDIOC_SYNTAX, fd;
71 char *cf, *buf = NULL, *args;
72 size_t bufsize, loaded = 0;
73
74 if (audioc_cmdline_parser(argc, argv, &conf))
75 goto out;
76 HANDLE_VERSION_FLAG("audioc", conf);
77 cf = configfile_exists();
78 if (cf) {
79 struct audioc_cmdline_parser_params params = {
80 .override = 0,
81 .initialize = 0,
82 .check_required = 0,
83 .check_ambiguity = 0
84 };
85 if (audioc_cmdline_parser_config_file(cf, &conf, &params)) {
86 fprintf(stderr, "parse error in config file\n");
87 exit(EXIT_FAILURE);
88 }
89 }
90 args = conf.inputs_num?
91 concat_args(conf.inputs_num, conf.inputs) :
92 para_strdup("stat");
93 bufsize = conf.bufsize_arg;
94 buf = para_malloc(bufsize);
95
96 if (conf.socket_given) {
97 ret = create_remote_socket(conf.socket_arg);
98 } else {
99 char *hn = para_hostname(),
100 *socket_name = make_message("/var/paraslash/audiod_socket.%s", hn);
101
102 ret = create_remote_socket(socket_name);
103 free(hn);
104 free(socket_name);
105 }
106 if (ret < 0)
107 goto out;
108 fd = ret;
109
110 ret = send_cred_buffer(fd, args);
111 if (ret < 0)
112 goto out;
113 for (;;) {
114 int max_fileno = -1, check_write = 0;
115 ssize_t len;
116 fd_set rfd, wfd;
117 FD_ZERO(&rfd);
118 FD_ZERO(&wfd);
119 if (loaded < bufsize)
120 para_fd_set(fd, &rfd, &max_fileno);
121 if (loaded > 0) {
122 para_fd_set(STDOUT_FILENO, &wfd, &max_fileno);
123 check_write = 1;
124 }
125 ret = -E_AUDIOC_OVERRUN;
126 if (max_fileno < 0)
127 goto out;
128 ret = para_select(max_fileno + 1, &rfd, &wfd, NULL);
129 if (ret < 0)
130 goto out;
131 if (loaded < bufsize && FD_ISSET(fd, &rfd)) {
132 len = recv_bin_buffer(fd, buf + loaded,
133 bufsize - loaded);
134 if (len <= 0) {
135 ret = len < 0? -E_AUDIOC_READ : 0;
136 goto out;
137 }
138 loaded += len;
139 }
140 if (check_write && FD_ISSET(STDOUT_FILENO, &wfd)) {
141 ret = write(STDOUT_FILENO, buf, loaded);
142 if (ret < 0) {
143 ret = -E_AUDIOC_WRITE;
144 goto out;
145 }
146 loaded -= ret;
147 }
148 }
149 out:
150 if (!ret && loaded && buf)
151 ret = write(STDOUT_FILENO, buf, loaded);
152 if (ret < 0)
153 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
154 return ret < 0? EXIT_FAILURE : EXIT_SUCCESS;
155 }