audioc.c

   1 /*
   2  * Copyright (C) 2005-2006 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
  26 struct gengetopt_args_info conf;
  27 char *tmpfifo;
  28 enum {E_SYNTAX, E_READ, E_WRITE, E_SOCKET, E_INIT_SOCK_ADDR, E_CONNECT, E_CREDENTIALS, E_SELECT, E_OVERRUN};
  29
  30
  31 void para_log(__unused int ll, __unused char* fmt,...) /* no logging */
  32 {
  33 }
  34
  35 /* audioc does not use encryption */
  36 void (*crypt_function_recv)(unsigned long len, const unsigned char *indata, unsigned char *outdata) = NULL;
  37 void (*crypt_function_send)(unsigned long len, const unsigned char *indata, unsigned char *outdata) = NULL;
  38
  39 static char *concat_args(const int argc, char * const *argv)
  40 {
  41         int i; char *buf = NULL;
  42         for (i = 0; i < argc; i++) {
  43                 buf = para_strcat(buf, argv[i]);
  44                 if (i != argc - 1)
  45                         buf = para_strcat(buf, "\n");
  46         }
  47         return buf;
  48 }
  49
  50 static char *configfile_exists(void)
  51 {
  52         static char *config_file;
  53         struct stat statbuf;
  54
  55
  56         if (!config_file) {
  57                 char *home = para_homedir();
  58                 config_file = make_message("%s/.paraslash/audioc.conf", home);
  59                 free(home);
  60         }
  61         if (!stat(config_file, &statbuf))
  62                 return config_file;
  63         return NULL;
  64 }
  65
  66 int main(int argc, char *argv[])
  67 {
  68         struct sockaddr_un unix_addr;
  69         int ret = -E_SYNTAX, fd, loaded = 0;
  70         char *cf, *socket_name, *randname = para_tmpname(), *tmpsocket_name = NULL,
  71                 *buf = NULL, *hn = para_hostname(), *args, *home = para_homedir();
  72
  73
  74         if (cmdline_parser(argc, argv, &conf))
  75                 goto out;
  76         cf = configfile_exists();
  77         if (cf) {
  78                 if (cmdline_parser_configfile(cf, &conf, 0, 0, 0)) {
  79                         fprintf(stderr, "parse error in config file\n");
  80                         exit(EXIT_FAILURE);
  81                 }
  82         }
  83         args = conf.inputs_num?
  84                 concat_args(conf.inputs_num, conf.inputs) :
  85                 para_strdup("stat");
  86         buf = para_malloc(conf.bufsize_arg);
  87         if (conf.socket_given)
  88                 socket_name = para_strdup(conf.socket_arg);
  89         else
  90                 socket_name = make_message(
  91                         "/var/paraslash/audiod_socket.%s", hn);
  92         if (conf.tmpdir_given)
  93                 tmpsocket_name = make_message("%s/audioc.sock.%s.%s",
  94                         conf.tmpdir_arg, hn, randname);
  95         else
  96                 tmpsocket_name = make_message("%s/.paraslash/audioc_sock.%s.%s",
  97                         home, hn, randname);
  98
  99         ret = -E_SOCKET;
 100         fd = create_pf_socket(tmpsocket_name, &unix_addr, S_IRUSR | S_IWUSR);
 101         unlink(tmpsocket_name);
 102         if (fd < 0)
 103                 goto out;
 104         ret = -E_INIT_SOCK_ADDR;
 105         if (init_unix_addr(&unix_addr, socket_name) < 0)
 106                 goto out;
 107         ret = - E_CONNECT;
 108         if (connect(fd, (struct sockaddr *)&unix_addr, UNIX_PATH_MAX) < 0)
 109                 goto out;
 110         ret = -E_CREDENTIALS;
 111         if (send_cred_buffer(fd, args) < 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 && loaded > 10000)
 120                         fprintf(stderr, "loaded: %d\n", loaded);
 121                 if (loaded < conf.bufsize_arg) {
 122                         FD_SET(fd, &rfd);
 123                         max_fileno = MAX(max_fileno, fd);
 124                 }
 125                 if (loaded > 0) {
 126                         FD_SET(STDOUT_FILENO, &wfd);
 127                         max_fileno = MAX(max_fileno, STDOUT_FILENO);
 128                         check_write = 1;
 129                 }
 130                 ret = -E_OVERRUN;
 131                 if (max_fileno < 0)
 132                         goto out;
 133                 ret = select(max_fileno + 1, &rfd, &wfd, NULL, NULL);
 134                 if (ret < 0) {
 135                         ret = -E_SELECT;
 136                         goto out;
 137                 }
 138                 if (loaded < conf.bufsize_arg && FD_ISSET(fd, &rfd)) {
 139                         len = recv_bin_buffer(fd, buf + loaded,
 140                                 conf.bufsize_arg - loaded);
 141                         if (len <= 0) {
 142                                 ret = len < 0? -E_READ : 0;
 143                                 goto out;
 144                         }
 145                         loaded += len;
 146                 }
 147                 if (check_write && FD_ISSET(STDOUT_FILENO, &wfd)) {
 148                         ret = write(STDOUT_FILENO, buf, loaded);
 149                         if (ret < 0) {
 150                                 ret = -E_WRITE;
 151                                 goto out;
 152                         }
 153                         loaded -= ret;
 154                 }
 155         }
 156 out:
 157         if (!ret && loaded && buf)
 158                 ret = write(STDOUT_FILENO, buf, loaded);
 159         return ret < 0? -ret : EXIT_SUCCESS;
 160 }