code.delx.au - pulseaudio/blob - src/utils/pacmd.c

   1 /***
   2   This file is part of PulseAudio.
   3
   4   Copyright 2004-2006 Lennart Poettering
   5
   6   PulseAudio is free software; you can redistribute it and/or modify
   7   it under the terms of the GNU Lesser General Public License as published
   8   by the Free Software Foundation; either version 2.1 of the License,
   9   or (at your option) any later version.
  10
  11   PulseAudio is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with PulseAudio; if not, write to the Free Software
  18   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  19   USA.
  20 ***/
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <config.h>
  24 #endif
  25
  26 #include <assert.h>
  27 #include <signal.h>
  28 #include <sys/socket.h>
  29 #include <unistd.h>
  30 #include <errno.h>
  31 #include <string.h>
  32 #include <sys/un.h>
  33 #include <locale.h>
  34
  35 #include <pulse/util.h>
  36 #include <pulse/xmalloc.h>
  37
  38 #include <pulsecore/i18n.h>
  39 #include <pulsecore/poll.h>
  40 #include <pulsecore/macro.h>
  41 #include <pulsecore/core-util.h>
  42 #include <pulsecore/log.h>
  43 #include <pulsecore/pid.h>
  44
  45 int main(int argc, char*argv[]) {
  46     pid_t pid;
  47     int fd = -1;
  48     int ret = 1, i;
  49     struct sockaddr_un sa;
  50     char ibuf[PIPE_BUF], obuf[PIPE_BUF];
  51     size_t ibuf_index, ibuf_length, obuf_index, obuf_length;
  52     char *cli;
  53     pa_bool_t ibuf_eof, obuf_eof, ibuf_closed, obuf_closed;
  54     struct pollfd pollfd[3];
  55     struct pollfd *watch_socket, *watch_stdin, *watch_stdout;
  56
  57     int stdin_type = 0, stdout_type = 0, fd_type = 0;
  58
  59     setlocale(LC_ALL, "");
  60 #ifdef ENABLE_NLS
  61     bindtextdomain(GETTEXT_PACKAGE, PULSE_LOCALEDIR);
  62 #endif
  63
  64     if (pa_pid_file_check_running(&pid, "pulseaudio") < 0) {
  65         pa_log(_("No PulseAudio daemon running, or not running as session daemon."));
  66         goto fail;
  67     }
  68
  69     if ((fd = pa_socket_cloexec(PF_UNIX, SOCK_STREAM, 0)) < 0) {
  70         pa_log(_("socket(PF_UNIX, SOCK_STREAM, 0): %s"), strerror(errno));
  71         goto fail;
  72     }
  73
  74     pa_zero(sa);
  75     sa.sun_family = AF_UNIX;
  76
  77     if (!(cli = pa_runtime_path("cli")))
  78         goto fail;
  79
  80     pa_strlcpy(sa.sun_path, cli, sizeof(sa.sun_path));
  81     pa_xfree(cli);
  82
  83     for (i = 0; i < 5; i++) {
  84         int r;
  85
  86         if ((r = connect(fd, (struct sockaddr*) &sa, sizeof(sa))) < 0 && (errno != ECONNREFUSED && errno != ENOENT)) {
  87             pa_log(_("connect(): %s"), strerror(errno));
  88             goto fail;
  89         }
  90
  91         if (r >= 0)
  92             break;
  93
  94         if (pa_pid_file_kill(SIGUSR2, NULL, "pulseaudio") < 0) {
  95             pa_log(_("Failed to kill PulseAudio daemon."));
  96             goto fail;
  97         }
  98
  99         pa_msleep(300);
 100     }
 101
 102     if (i >= 5) {
 103         pa_log(_("Daemon not responding."));
 104         goto fail;
 105     }
 106
 107     ibuf_index = ibuf_length = obuf_index = obuf_length = 0;
 108     ibuf_eof = obuf_eof = ibuf_closed = obuf_closed = FALSE;
 109
 110     if (argc > 1) {
 111         for (i = 1; i < argc; i++) {
 112             size_t k;
 113
 114             k = PA_MIN(sizeof(ibuf) - ibuf_length, strlen(argv[i]));
 115             memcpy(ibuf + ibuf_length, argv[i], k);
 116             ibuf_length += k;
 117
 118             if (ibuf_length < sizeof(ibuf)) {
 119                 ibuf[ibuf_length] = i < argc-1 ? ' ' : '\n';
 120                 ibuf_length++;
 121             }
 122         }
 123
 124         ibuf_eof = TRUE;
 125     }
 126
 127     for (;;) {
 128         struct pollfd *p;
 129
 130         if (ibuf_eof &&
 131             obuf_eof &&
 132             ibuf_length <= 0 &&
 133             obuf_length <= 0)
 134             break;
 135
 136         if (ibuf_length <= 0 && ibuf_eof && !ibuf_closed) {
 137             shutdown(fd, SHUT_WR);
 138             ibuf_closed = TRUE;
 139         }
 140
 141         if (obuf_length <= 0 && obuf_eof && !obuf_closed) {
 142             shutdown(fd, SHUT_RD);
 143             obuf_closed = TRUE;
 144         }
 145
 146         pa_zero(pollfd);
 147
 148         p = pollfd;
 149
 150         if (ibuf_length > 0 || (!obuf_eof && obuf_length <= 0)) {
 151             watch_socket = p++;
 152             watch_socket->fd = fd;
 153             watch_socket->events =
 154                 (ibuf_length > 0 ? POLLOUT : 0) |
 155                 (!obuf_eof && obuf_length <= 0 ? POLLIN : 0);
 156         } else
 157             watch_socket = NULL;
 158
 159         if (!ibuf_eof && ibuf_length <= 0) {
 160             watch_stdin = p++;
 161             watch_stdin->fd = STDIN_FILENO;
 162             watch_stdin->events = POLLIN;
 163         } else
 164             watch_stdin = NULL;
 165
 166         if (obuf_length > 0) {
 167             watch_stdout = p++;
 168             watch_stdout->fd = STDOUT_FILENO;
 169             watch_stdout->events = POLLOUT;
 170         } else
 171             watch_stdout = NULL;
 172
 173         if (pa_poll(pollfd, p-pollfd, -1) < 0) {
 174
 175             if (errno == EINTR)
 176                 continue;
 177
 178             pa_log(_("poll(): %s"), strerror(errno));
 179             goto fail;
 180         }
 181
 182         if (watch_stdin) {
 183             if (watch_stdin->revents & POLLIN) {
 184                 ssize_t r;
 185                 pa_assert(ibuf_length <= 0);
 186
 187                 if ((r = pa_read(STDIN_FILENO, ibuf, sizeof(ibuf), &stdin_type)) <= 0) {
 188                     if (r < 0) {
 189                         pa_log(_("read(): %s"), strerror(errno));
 190                         goto fail;
 191                     }
 192
 193                     ibuf_eof = TRUE;
 194                 } else {
 195                     ibuf_length = (size_t) r;
 196                     ibuf_index = 0;
 197                 }
 198             } else if (watch_stdin->revents & POLLHUP)
 199                 ibuf_eof = TRUE;
 200         }
 201
 202         if (watch_socket) {
 203             if (watch_socket->revents & POLLIN) {
 204                 ssize_t r;
 205                 pa_assert(obuf_length <= 0);
 206
 207                 if ((r = pa_read(fd, obuf, sizeof(obuf), &fd_type)) <= 0) {
 208                     if (r < 0) {
 209                         pa_log(_("read(): %s"), strerror(errno));
 210                         goto fail;
 211                     }
 212
 213                     obuf_eof = TRUE;
 214                 } else {
 215                     obuf_length = (size_t) r;
 216                     obuf_index = 0;
 217                 }
 218             } else if (watch_socket->revents & POLLHUP)
 219                 obuf_eof = TRUE;
 220         }
 221
 222         if (watch_stdout) {
 223             if (watch_stdout->revents & POLLHUP) {
 224                 obuf_eof = TRUE;
 225                 obuf_length = 0;
 226             } else if (watch_stdout->revents & POLLOUT) {
 227                 ssize_t r;
 228                 pa_assert(obuf_length > 0);
 229
 230                 if ((r = pa_write(STDOUT_FILENO, obuf + obuf_index, obuf_length, &stdout_type)) < 0) {
 231                     pa_log(_("write(): %s"), strerror(errno));
 232                     goto fail;
 233                 }
 234
 235                 obuf_length -= (size_t) r;
 236                 obuf_index += obuf_index;
 237             }
 238         }
 239
 240         if (watch_socket) {
 241             if (watch_socket->revents & POLLHUP) {
 242                 ibuf_eof = TRUE;
 243                 ibuf_length = 0;
 244             } if (watch_socket->revents & POLLOUT) {
 245                 ssize_t r;
 246                 pa_assert(ibuf_length > 0);
 247
 248                 if ((r = pa_write(fd, ibuf + ibuf_index, ibuf_length, &fd_type)) < 0) {
 249                     pa_log(_("write(): %s"), strerror(errno));
 250                     goto fail;
 251                 }
 252
 253                 ibuf_length -= (size_t) r;
 254                 ibuf_index += obuf_index;
 255             }
 256         }
 257     }
 258
 259     ret = 0;
 260
 261 fail:
 262     if (fd >= 0)
 263         pa_close(fd);
 264
 265     return ret;
 266 }