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     bindtextdomain(GETTEXT_PACKAGE, PULSE_LOCALEDIR);
  61
  62     if (pa_pid_file_check_running(&pid, "pulseaudio") < 0) {
  63         pa_log(_("No PulseAudio daemon running, or not running as session daemon."));
  64         goto fail;
  65     }
  66
  67     if ((fd = pa_socket_cloexec(PF_UNIX, SOCK_STREAM, 0)) < 0) {
  68         pa_log(_("socket(PF_UNIX, SOCK_STREAM, 0): %s"), strerror(errno));
  69         goto fail;
  70     }
  71
  72     pa_zero(sa);
  73     sa.sun_family = AF_UNIX;
  74
  75     if (!(cli = pa_runtime_path("cli")))
  76         goto fail;
  77
  78     pa_strlcpy(sa.sun_path, cli, sizeof(sa.sun_path));
  79     pa_xfree(cli);
  80
  81     for (i = 0; i < 5; i++) {
  82         int r;
  83
  84         if ((r = connect(fd, (struct sockaddr*) &sa, sizeof(sa))) < 0 && (errno != ECONNREFUSED && errno != ENOENT)) {
  85             pa_log(_("connect(): %s"), strerror(errno));
  86             goto fail;
  87         }
  88
  89         if (r >= 0)
  90             break;
  91
  92         if (pa_pid_file_kill(SIGUSR2, NULL, "pulseaudio") < 0) {
  93             pa_log(_("Failed to kill PulseAudio daemon."));
  94             goto fail;
  95         }
  96
  97         pa_msleep(300);
  98     }
  99
 100     if (i >= 5) {
 101         pa_log(_("Daemon not responding."));
 102         goto fail;
 103     }
 104
 105     ibuf_index = ibuf_length = obuf_index = obuf_length = 0;
 106     ibuf_eof = obuf_eof = ibuf_closed = obuf_closed = FALSE;
 107
 108     if (argc > 1) {
 109         for (i = 1; i < argc; i++) {
 110             size_t k;
 111
 112             k = PA_MIN(sizeof(ibuf) - ibuf_length, strlen(argv[i]));
 113             memcpy(ibuf + ibuf_length, argv[i], k);
 114             ibuf_length += k;
 115
 116             if (ibuf_length < sizeof(ibuf)) {
 117                 ibuf[ibuf_length] = i < argc-1 ? ' ' : '\n';
 118                 ibuf_length++;
 119             }
 120         }
 121
 122         ibuf_eof = TRUE;
 123     }
 124
 125     for (;;) {
 126         struct pollfd *p;
 127
 128         if (ibuf_eof &&
 129             obuf_eof &&
 130             ibuf_length <= 0 &&
 131             obuf_length <= 0)
 132             break;
 133
 134         if (ibuf_length <= 0 && ibuf_eof && !ibuf_closed) {
 135             shutdown(fd, SHUT_WR);
 136             ibuf_closed = TRUE;
 137         }
 138
 139         if (obuf_length <= 0 && obuf_eof && !obuf_closed) {
 140             shutdown(fd, SHUT_RD);
 141             obuf_closed = TRUE;
 142         }
 143
 144         pa_zero(pollfd);
 145
 146         p = pollfd;
 147
 148         if (ibuf_length > 0 || (!obuf_eof && obuf_length <= 0)) {
 149             watch_socket = p++;
 150             watch_socket->fd = fd;
 151             watch_socket->events =
 152                 (ibuf_length > 0 ? POLLOUT : 0) |
 153                 (!obuf_eof && obuf_length <= 0 ? POLLIN : 0);
 154         } else
 155             watch_socket = NULL;
 156
 157         if (!ibuf_eof && ibuf_length <= 0) {
 158             watch_stdin = p++;
 159             watch_stdin->fd = STDIN_FILENO;
 160             watch_stdin->events = POLLIN;
 161         } else
 162             watch_stdin = NULL;
 163
 164         if (obuf_length > 0) {
 165             watch_stdout = p++;
 166             watch_stdout->fd = STDOUT_FILENO;
 167             watch_stdout->events = POLLOUT;
 168         } else
 169             watch_stdout = NULL;
 170
 171         if (pa_poll(pollfd, p-pollfd, -1) < 0) {
 172
 173             if (errno == EINTR)
 174                 continue;
 175
 176             pa_log(_("poll(): %s"), strerror(errno));
 177             goto fail;
 178         }
 179
 180         if (watch_stdin) {
 181             if (watch_stdin->revents & POLLIN) {
 182                 ssize_t r;
 183                 pa_assert(ibuf_length <= 0);
 184
 185                 if ((r = pa_read(STDIN_FILENO, ibuf, sizeof(ibuf), &stdin_type)) <= 0) {
 186                     if (r < 0) {
 187                         pa_log(_("read(): %s"), strerror(errno));
 188                         goto fail;
 189                     }
 190
 191                     ibuf_eof = TRUE;
 192                 } else {
 193                     ibuf_length = (size_t) r;
 194                     ibuf_index = 0;
 195                 }
 196             } else if (watch_stdin->revents & POLLHUP)
 197                 ibuf_eof = TRUE;
 198         }
 199
 200         if (watch_socket) {
 201             if (watch_socket->revents & POLLIN) {
 202                 ssize_t r;
 203                 pa_assert(obuf_length <= 0);
 204
 205                 if ((r = pa_read(fd, obuf, sizeof(obuf), &fd_type)) <= 0) {
 206                     if (r < 0) {
 207                         pa_log(_("read(): %s"), strerror(errno));
 208                         goto fail;
 209                     }
 210
 211                     obuf_eof = TRUE;
 212                 } else {
 213                     obuf_length = (size_t) r;
 214                     obuf_index = 0;
 215                 }
 216             } else if (watch_socket->revents & POLLHUP)
 217                 obuf_eof = TRUE;
 218         }
 219
 220         if (watch_stdout) {
 221             if (watch_stdout->revents & POLLHUP) {
 222                 obuf_eof = TRUE;
 223                 obuf_length = 0;
 224             } else if (watch_stdout->revents & POLLOUT) {
 225                 ssize_t r;
 226                 pa_assert(obuf_length > 0);
 227
 228                 if ((r = pa_write(STDOUT_FILENO, obuf + obuf_index, obuf_length, &stdout_type)) < 0) {
 229                     pa_log(_("write(): %s"), strerror(errno));
 230                     goto fail;
 231                 }
 232
 233                 obuf_length -= (size_t) r;
 234                 obuf_index += obuf_index;
 235             }
 236         }
 237
 238         if (watch_socket) {
 239             if (watch_socket->revents & POLLHUP) {
 240                 ibuf_eof = TRUE;
 241                 ibuf_length = 0;
 242             } if (watch_socket->revents & POLLOUT) {
 243                 ssize_t r;
 244                 pa_assert(ibuf_length > 0);
 245
 246                 if ((r = pa_write(fd, ibuf + ibuf_index, ibuf_length, &fd_type)) < 0) {
 247                     pa_log(_("write(): %s"), strerror(errno));
 248                     goto fail;
 249                 }
 250
 251                 ibuf_length -= (size_t) r;
 252                 ibuf_index += obuf_index;
 253             }
 254         }
 255     }
 256
 257     ret = 0;
 258
 259 fail:
 260     if (fd >= 0)
 261         pa_close(fd);
 262
 263     return ret;
 264 }