Add a .gitignore file.
[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 "audioc.cmdline.h"
10 #include "para.h"
11 #include "net.h"
12 #include "string.h"
13 #include "fd.h"
14 #include "error.h"
15
16 INIT_AUDIOC_ERRLISTS;
17
18 /** the gengetopt structure containing command line args */
19 struct audioc_args_info conf;
20
21 INIT_STDERR_LOGGING(conf.loglevel_arg);
22
23 static char *concat_args(unsigned argc, char * const *argv)
24 {
25 int i; char *buf = NULL;
26 for (i = 0; i < argc; i++) {
27 buf = para_strcat(buf, argv[i]);
28 if (i != argc - 1)
29 buf = para_strcat(buf, "\n");
30 }
31 return buf;
32 }
33
34 static char *configfile_exists(void)
35 {
36 static char *config_file;
37 struct stat statbuf;
38
39
40 if (!config_file) {
41 char *home = para_homedir();
42 config_file = make_message("%s/.paraslash/audioc.conf", home);
43 free(home);
44 }
45 if (!stat(config_file, &statbuf))
46 return config_file;
47 return NULL;
48 }
49
50 /**
51 * the client program to connect to para_audiod
52 *
53 * \param argc usual argument count
54 * \param argv usual argument vector
55 *
56 * It creates a temporary local socket in order to communicate with para_audiod.
57 * Authentication consists in sending a ucred buffer that contains the user id.
58 *
59 * Any output received through the local socket is sent to stdout.
60 *
61 * \return EXIT_SUCCESS or EXIT_FAILURE
62 *
63 * \sa send_cred_buffer(), para_audioc(1), para_audiod(1).
64 */
65 int main(int argc, char *argv[])
66 {
67 struct sockaddr_un unix_addr;
68 int ret = -E_AUDIOC_SYNTAX, fd;
69 char *cf, *socket_name, *randname = para_tmpname(), *tmpsocket_name = NULL,
70 *buf = NULL, *hn = para_hostname(), *args, *home = para_homedir();
71 size_t bufsize, loaded = 0;
72
73 if (audioc_cmdline_parser(argc, argv, &conf))
74 goto out;
75 HANDLE_VERSION_FLAG("audioc", conf);
76 cf = configfile_exists();
77 if (cf) {
78 struct audioc_cmdline_parser_params params = {
79 .override = 0,
80 .initialize = 0,
81 .check_required = 0,
82 .check_ambiguity = 0
83 };
84 if (audioc_cmdline_parser_config_file(cf, &conf, &params)) {
85 fprintf(stderr, "parse error in config file\n");
86 exit(EXIT_FAILURE);
87 }
88 }
89 args = conf.inputs_num?
90 concat_args(conf.inputs_num, conf.inputs) :
91 para_strdup("stat");
92 bufsize = conf.bufsize_arg;
93 buf = para_malloc(bufsize);
94 if (conf.socket_given)
95 socket_name = para_strdup(conf.socket_arg);
96 else
97 socket_name = make_message(
98 "/var/paraslash/audiod_socket.%s", hn);
99 if (conf.tmpdir_given)
100 tmpsocket_name = make_message("%s/audioc.sock.%s.%s",
101 conf.tmpdir_arg, hn, randname);
102 else
103 tmpsocket_name = make_message("%s/.paraslash/audioc_sock.%s.%s",
104 home, hn, randname);
105
106 ret = create_local_socket(tmpsocket_name, &unix_addr, S_IRUSR | S_IWUSR);
107 unlink(tmpsocket_name);
108 free(tmpsocket_name);
109 if (ret < 0)
110 goto out;
111 fd = ret;
112 ret = -E_INIT_SOCK_ADDR;
113 if (init_unix_addr(&unix_addr, socket_name) < 0)
114 goto out;
115 ret = -E_AUDIOC_CONNECT;
116 if (connect(fd, (struct sockaddr *)&unix_addr, UNIX_PATH_MAX) < 0) /* FIXME: Use para_connect() */
117 goto out;
118 ret = send_cred_buffer(fd, args);
119 if (ret < 0)
120 goto out;
121 for (;;) {
122 int max_fileno = -1, check_write = 0;
123 ssize_t len;
124 fd_set rfd, wfd;
125 FD_ZERO(&rfd);
126 FD_ZERO(&wfd);
127 if (loaded < bufsize)
128 para_fd_set(fd, &rfd, &max_fileno);
129 if (loaded > 0) {
130 para_fd_set(STDOUT_FILENO, &wfd, &max_fileno);
131 check_write = 1;
132 }
133 ret = -E_AUDIOC_OVERRUN;
134 if (max_fileno < 0)
135 goto out;
136 ret = para_select(max_fileno + 1, &rfd, &wfd, NULL);
137 if (ret < 0)
138 goto out;
139 if (loaded < bufsize && FD_ISSET(fd, &rfd)) {
140 len = recv_bin_buffer(fd, buf + loaded,
141 bufsize - loaded);
142 if (len <= 0) {
143 ret = len < 0? -E_AUDIOC_READ : 0;
144 goto out;
145 }
146 loaded += len;
147 }
148 if (check_write && FD_ISSET(STDOUT_FILENO, &wfd)) {
149 ret = write(STDOUT_FILENO, buf, loaded);
150 if (ret < 0) {
151 ret = -E_AUDIOC_WRITE;
152 goto out;
153 }
154 loaded -= ret;
155 }
156 }
157 out:
158 if (!ret && loaded && buf)
159 ret = write(STDOUT_FILENO, buf, loaded);
160 if (ret < 0)
161 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
162 return ret < 0? EXIT_FAILURE : EXIT_SUCCESS;
163 }