configure.ac: Fix --with-osl-libs option.
[paraslash.git] / audioc.c
1 /*
2  * Copyright (C) 2005-2009 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 #include <dirent.h>
12
13 #include "audioc.cmdline.h"
14 #include "para.h"
15 #include "error.h"
16 #include "net.h"
17 #include "string.h"
18 #include "fd.h"
19
20 INIT_AUDIOC_ERRLISTS;
21
22 /** the gengetopt structure containing command line args */
23 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; char *buf = NULL;
31         for (i = 0; i < argc; i++) {
32                 buf = para_strcat(buf, argv[i]);
33                 if (i != argc - 1)
34                         buf = para_strcat(buf, "\n");
35         }
36         return buf;
37 }
38
39 static char *configfile_exists(void)
40 {
41         static char *config_file;
42         struct stat statbuf;
43
44
45         if (!config_file) {
46                 char *home = para_homedir();
47                 config_file = make_message("%s/.paraslash/audioc.conf", home);
48                 free(home);
49         }
50         if (!stat(config_file, &statbuf))
51                 return config_file;
52         return NULL;
53 }
54
55 /**
56  * the client program to connect to para_audiod
57  *
58  * \param argc usual argument count
59  * \param argv usual argument vector
60  *
61  * It creates a temporary local socket in order to communicate with para_audiod.
62  * Authentication consists in sending a ucred buffer that contains the user id.
63  *
64  * Any output received through the local socket is sent to stdout.
65  *
66  * \return EXIT_SUCCESS or EXIT_FAILURE
67  *
68  * \sa send_cred_buffer(), para_audioc(1), para_audiod(1).
69  */
70 int main(int argc, char *argv[])
71 {
72         int ret = -E_AUDIOC_SYNTAX, fd;
73         char *cf, *buf = NULL, *args;
74         size_t bufsize, loaded = 0;
75
76         if (audioc_cmdline_parser(argc, argv, &conf))
77                 goto out;
78         HANDLE_VERSION_FLAG("audioc", conf);
79         cf = configfile_exists();
80         if (cf) {
81                 struct audioc_cmdline_parser_params params = {
82                         .override = 0,
83                         .initialize = 0,
84                         .check_required = 0,
85                         .check_ambiguity = 0
86                 };
87                 if (audioc_cmdline_parser_config_file(cf, &conf, &params)) {
88                         fprintf(stderr, "parse error in config file\n");
89                         exit(EXIT_FAILURE);
90                 }
91         }
92         loglevel = get_loglevel_by_name(conf.loglevel_arg);
93         args = conf.inputs_num?
94                 concat_args(conf.inputs_num, conf.inputs) :
95                 para_strdup("stat");
96         bufsize = conf.bufsize_arg;
97         buf = para_malloc(bufsize);
98
99         if (conf.socket_given) {
100                 ret = create_remote_socket(conf.socket_arg);
101         } else {
102                 char *hn = para_hostname(),
103                      *socket_name = make_message("/var/paraslash/audiod_socket.%s", hn);
104
105                 ret = create_remote_socket(socket_name);
106                 free(hn);
107                 free(socket_name);
108         }
109         if (ret < 0)
110                 goto out;
111         fd = ret;
112         ret = mark_fd_nonblocking(fd);
113         if (ret < 0)
114                 goto out;
115         ret = mark_fd_nonblocking(STDOUT_FILENO);
116         if (ret < 0)
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                         if (loaded && ret)
156                                 memmove(buf, buf + ret, loaded);
157                 }
158         }
159 out:
160         if (!ret && loaded && buf)
161                 ret = write(STDOUT_FILENO, buf, loaded);
162         if (ret < 0)
163                 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
164         return ret < 0? EXIT_FAILURE : EXIT_SUCCESS;
165 }