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

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of PulseAudio.
   5
   6   Copyright 2004-2006 Lennart Poettering
   7
   8   PulseAudio is free software; you can redistribute it and/or modify
   9   it under the terms of the GNU Lesser General Public License as published
  10   by the Free Software Foundation; either version 2 of the License,
  11   or (at your option) any later version.
  12
  13   PulseAudio is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   General Public License for more details.
  17
  18   You should have received a copy of the GNU Lesser General Public License
  19   along with PulseAudio; if not, write to the Free Software
  20   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  21   USA.
  22 ***/
  23
  24 #ifdef HAVE_CONFIG_H
  25 #include <config.h>
  26 #endif
  27
  28 #include <assert.h>
  29 #include <signal.h>
  30 #include <sys/select.h>
  31 #include <sys/socket.h>
  32 #include <unistd.h>
  33 #include <errno.h>
  34 #include <string.h>
  35 #include <sys/un.h>
  36
  37 #include <pulse/error.h>
  38 #include <pulse/util.h>
  39
  40 #include <pulsecore/core-util.h>
  41 #include <pulsecore/log.h>
  42 #include <pulsecore/pid.h>
  43
  44 int main(PA_GCC_UNUSED int argc, PA_GCC_UNUSED char*argv[]) {
  45     pid_t pid ;
  46     int fd = -1;
  47     int ret = 1, i;
  48     struct sockaddr_un sa;
  49     char ibuf[256], obuf[256];
  50     size_t ibuf_index, ibuf_length, obuf_index, obuf_length;
  51     fd_set ifds, ofds;
  52
  53     if (pa_pid_file_check_running(&pid) < 0) {
  54         pa_log("no PulseAudio daemon running");
  55         goto fail;
  56     }
  57
  58     if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0) {
  59         pa_log("socket(PF_UNIX, SOCK_STREAM, 0): %s", strerror(errno));
  60         goto fail;
  61     }
  62
  63     memset(&sa, 0, sizeof(sa));
  64     sa.sun_family = AF_UNIX;
  65     pa_runtime_path("cli", sa.sun_path, sizeof(sa.sun_path));
  66
  67     for (i = 0; i < 5; i++) {
  68         int r;
  69
  70         if ((r = connect(fd, (struct sockaddr*) &sa, sizeof(sa))) < 0 && (errno != ECONNREFUSED && errno != ENOENT)) {
  71             pa_log("connect(): %s", strerror(errno));
  72             goto fail;
  73         }
  74
  75         if (r >= 0)
  76             break;
  77
  78         if (pa_pid_file_kill(SIGUSR2, NULL) < 0) {
  79             pa_log("failed to kill PulseAudio daemon.");
  80             goto fail;
  81         }
  82
  83         pa_msleep(300);
  84     }
  85
  86     if (i >= 5) {
  87         pa_log("daemon not responding.");
  88         goto fail;
  89     }
  90
  91     ibuf_index = ibuf_length = obuf_index = obuf_length = 0;
  92
  93
  94     FD_ZERO(&ifds);
  95     FD_SET(0, &ifds);
  96     FD_SET(fd, &ifds);
  97
  98     FD_ZERO(&ofds);
  99
 100     for (;;) {
 101         if (select(FD_SETSIZE, &ifds, &ofds, NULL, NULL) < 0) {
 102             pa_log("select(): %s", strerror(errno));
 103             goto fail;
 104         }
 105
 106         if (FD_ISSET(0, &ifds)) {
 107             ssize_t r;
 108             assert(!ibuf_length);
 109
 110             if ((r = read(0, ibuf, sizeof(ibuf))) <= 0) {
 111                 if (r == 0)
 112                     break;
 113
 114                 pa_log("read(): %s", strerror(errno));
 115                 goto fail;
 116             }
 117
 118             ibuf_length = (size_t) r;
 119             ibuf_index = 0;
 120         }
 121
 122         if (FD_ISSET(fd, &ifds)) {
 123             ssize_t r;
 124             assert(!obuf_length);
 125
 126             if ((r = read(fd, obuf, sizeof(obuf))) <= 0) {
 127                 if (r == 0)
 128                     break;
 129
 130                 pa_log("read(): %s", strerror(errno));
 131                 goto fail;
 132             }
 133
 134             obuf_length = (size_t) r;
 135             obuf_index = 0;
 136         }
 137
 138         if (FD_ISSET(1, &ofds)) {
 139             ssize_t r;
 140             assert(obuf_length);
 141
 142             if ((r = write(1, obuf + obuf_index, obuf_length)) < 0) {
 143                 pa_log("write(): %s", strerror(errno));
 144                 goto fail;
 145             }
 146
 147             obuf_length -= (size_t) r;
 148             obuf_index += obuf_index;
 149
 150         }
 151
 152         if (FD_ISSET(fd, &ofds)) {
 153             ssize_t r;
 154             assert(ibuf_length);
 155
 156             if ((r = write(fd, ibuf + ibuf_index, ibuf_length)) < 0) {
 157                 pa_log("write(): %s", strerror(errno));
 158                 goto fail;
 159             }
 160
 161             ibuf_length -= (size_t) r;
 162             ibuf_index += obuf_index;
 163
 164         }
 165
 166         FD_ZERO(&ifds);
 167         FD_ZERO(&ofds);
 168
 169         if (obuf_length <= 0)
 170             FD_SET(fd, &ifds);
 171         else
 172             FD_SET(1, &ofds);
 173
 174         if (ibuf_length <= 0)
 175             FD_SET(0, &ifds);
 176         else
 177             FD_SET(fd, &ofds);
 178     }
 179
 180
 181     ret = 0;
 182
 183 fail:
 184     if (fd >= 0)
 185         close(fd);
 186
 187     return ret;
 188 }