Merge /home/maan/scm/paraslash_fml/paraslash
[paraslash.git] / audioc.c
1 /*
2 * Copyright (C) 2005-2007 Andre Noll <maan@systemlinux.org>
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
17 */
18
19 /** \file audioc.c the client program used to connect to para_audiod */
20
21 #include "audioc.cmdline.h"
22 #include "para.h"
23 #include "net.h"
24 #include "string.h"
25 #include "fd.h"
26 #include "error.h"
27
28 INIT_AUDIOC_ERRLISTS;
29
30 /** the gengetopt structure containing command line args */
31 struct audioc_args_info conf;
32
33 INIT_STDERR_LOGGING(conf.loglevel_arg);
34
35 static char *concat_args(const int argc, char * const *argv)
36 {
37 int i; char *buf = NULL;
38 for (i = 0; i < argc; i++) {
39 buf = para_strcat(buf, argv[i]);
40 if (i != argc - 1)
41 buf = para_strcat(buf, "\n");
42 }
43 return buf;
44 }
45
46 static char *configfile_exists(void)
47 {
48 static char *config_file;
49 struct stat statbuf;
50
51
52 if (!config_file) {
53 char *home = para_homedir();
54 config_file = make_message("%s/.paraslash/audioc.conf", home);
55 free(home);
56 }
57 if (!stat(config_file, &statbuf))
58 return config_file;
59 return NULL;
60 }
61
62 /**
63 * the client program to connect to para_audiod
64 *
65 * \param argc usual argument count
66 * \param argv usual argument vector
67 *
68 * It creates a temporary local socket in order to communicate with para_audiod.
69 * Authentication consists in sending a ucred buffer that contains the user id.
70 *
71 * Any output received through the local socket is sent to stdout.
72 *
73 * \return EXIT_SUCCESS or EXIT_FAILURE
74 *
75 * \sa send_cred_buffer(), para_audioc(1), para_audiod(1).
76 */
77 int main(int argc, char *argv[])
78 {
79 struct sockaddr_un unix_addr;
80 int ret = -E_AUDIOC_SYNTAX, fd, loaded = 0;
81 char *cf, *socket_name, *randname = para_tmpname(), *tmpsocket_name = NULL,
82 *buf = NULL, *hn = para_hostname(), *args, *home = para_homedir();
83
84
85 if (audioc_cmdline_parser(argc, argv, &conf))
86 goto out;
87 HANDLE_VERSION_FLAG("audioc", conf);
88 cf = configfile_exists();
89 if (cf) {
90 if (audioc_cmdline_parser_configfile(cf, &conf, 0, 0, 0)) {
91 fprintf(stderr, "parse error in config file\n");
92 exit(EXIT_FAILURE);
93 }
94 }
95 args = conf.inputs_num?
96 concat_args(conf.inputs_num, conf.inputs) :
97 para_strdup("stat");
98 buf = para_malloc(conf.bufsize_arg);
99 if (conf.socket_given)
100 socket_name = para_strdup(conf.socket_arg);
101 else
102 socket_name = make_message(
103 "/var/paraslash/audiod_socket.%s", hn);
104 if (conf.tmpdir_given)
105 tmpsocket_name = make_message("%s/audioc.sock.%s.%s",
106 conf.tmpdir_arg, hn, randname);
107 else
108 tmpsocket_name = make_message("%s/.paraslash/audioc_sock.%s.%s",
109 home, hn, randname);
110
111 ret = create_pf_socket(tmpsocket_name, &unix_addr, S_IRUSR | S_IWUSR);
112 unlink(tmpsocket_name);
113 if (ret < 0)
114 goto out;
115 fd = ret;
116 ret = -E_INIT_SOCK_ADDR;
117 if (init_unix_addr(&unix_addr, socket_name) < 0)
118 goto out;
119 ret = - E_AUDIOC_CONNECT;
120 if (connect(fd, (struct sockaddr *)&unix_addr, UNIX_PATH_MAX) < 0)
121 goto out;
122 ret = send_cred_buffer(fd, args);
123 if (ret < 0)
124 goto out;
125 for (;;) {
126 int max_fileno = -1, check_write = 0;
127 ssize_t len;
128 fd_set rfd, wfd;
129 FD_ZERO(&rfd);
130 FD_ZERO(&wfd);
131 if (loaded < conf.bufsize_arg)
132 para_fd_set(fd, &rfd, &max_fileno);
133 if (loaded > 0) {
134 para_fd_set(STDOUT_FILENO, &wfd, &max_fileno);
135 check_write = 1;
136 }
137 ret = -E_AUDIOC_OVERRUN;
138 if (max_fileno < 0)
139 goto out;
140 ret = para_select(max_fileno + 1, &rfd, &wfd, NULL);
141 if (ret < 0)
142 goto out;
143 if (loaded < conf.bufsize_arg && FD_ISSET(fd, &rfd)) {
144 len = recv_bin_buffer(fd, buf + loaded,
145 conf.bufsize_arg - loaded);
146 if (len <= 0) {
147 ret = len < 0? -E_AUDIOC_READ : 0;
148 goto out;
149 }
150 loaded += len;
151 }
152 if (check_write && FD_ISSET(STDOUT_FILENO, &wfd)) {
153 ret = write(STDOUT_FILENO, buf, loaded);
154 if (ret < 0) {
155 ret = -E_AUDIOC_WRITE;
156 goto out;
157 }
158 loaded -= ret;
159 }
160 }
161 out:
162 if (!ret && loaded && buf)
163 ret = write(STDOUT_FILENO, buf, loaded);
164 if (ret < 0)
165 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
166 return ret < 0? EXIT_FAILURE : EXIT_SUCCESS;
167 }