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