code.delx.au - pulseaudio/blob - src/pulsecore/cli.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 <stdio.h>
  29 #include <string.h>
  30 #include <assert.h>
  31 #include <stdlib.h>
  32
  33 #include <pulse/xmalloc.h>
  34
  35 #include <pulsecore/ioline.h>
  36 #include <pulsecore/module.h>
  37 #include <pulsecore/sink.h>
  38 #include <pulsecore/source.h>
  39 #include <pulsecore/client.h>
  40 #include <pulsecore/sink-input.h>
  41 #include <pulsecore/source-output.h>
  42 #include <pulsecore/tokenizer.h>
  43 #include <pulsecore/strbuf.h>
  44 #include <pulsecore/namereg.h>
  45 #include <pulsecore/cli-text.h>
  46 #include <pulsecore/cli-command.h>
  47 #include <pulsecore/log.h>
  48
  49 #include "cli.h"
  50
  51 #define PROMPT ">>> "
  52
  53 struct pa_cli {
  54     pa_core *core;
  55     pa_ioline *line;
  56
  57     void (*eof_callback)(pa_cli *c, void *userdata);
  58     void *userdata;
  59
  60     pa_client *client;
  61
  62     int fail, kill_requested, defer_kill;
  63 };
  64
  65 static void line_callback(pa_ioline *line, const char *s, void *userdata);
  66 static void client_kill(pa_client *c);
  67
  68 pa_cli* pa_cli_new(pa_core *core, pa_iochannel *io, pa_module *m) {
  69     char cname[256];
  70     pa_cli *c;
  71     assert(io);
  72
  73     c = pa_xmalloc(sizeof(pa_cli));
  74     c->core = core;
  75     c->line = pa_ioline_new(io);
  76     assert(c->line);
  77
  78     c->userdata = NULL;
  79     c->eof_callback = NULL;
  80
  81     pa_iochannel_socket_peer_to_string(io, cname, sizeof(cname));
  82     c->client = pa_client_new(core, __FILE__, cname);
  83     assert(c->client);
  84     c->client->kill = client_kill;
  85     c->client->userdata = c;
  86     c->client->owner = m;
  87
  88     pa_ioline_set_callback(c->line, line_callback, c);
  89     pa_ioline_puts(c->line, "Welcome to PulseAudio! Use \"help\" for usage information.\n"PROMPT);
  90
  91     c->fail = c->kill_requested = c->defer_kill = 0;
  92
  93     return c;
  94 }
  95
  96 void pa_cli_free(pa_cli *c) {
  97     assert(c);
  98     pa_ioline_close(c->line);
  99     pa_ioline_unref(c->line);
 100     pa_client_free(c->client);
 101     pa_xfree(c);
 102 }
 103
 104 static void client_kill(pa_client *client) {
 105     pa_cli *c;
 106     assert(client && client->userdata);
 107     c = client->userdata;
 108
 109     pa_log_debug("CLI client killed.");
 110     if (c->defer_kill)
 111         c->kill_requested = 1;
 112     else {
 113         if (c->eof_callback)
 114             c->eof_callback(c, c->userdata);
 115     }
 116 }
 117
 118 static void line_callback(pa_ioline *line, const char *s, void *userdata) {
 119     pa_strbuf *buf;
 120     pa_cli *c = userdata;
 121     char *p;
 122     assert(line && c);
 123
 124     if (!s) {
 125         pa_log_debug("CLI got EOF from user.");
 126         if (c->eof_callback)
 127             c->eof_callback(c, c->userdata);
 128
 129         return;
 130     }
 131
 132     buf = pa_strbuf_new();
 133     assert(buf);
 134     c->defer_kill++;
 135     pa_cli_command_execute_line(c->core, s, buf, &c->fail);
 136     c->defer_kill--;
 137     pa_ioline_puts(line, p = pa_strbuf_tostring_free(buf));
 138     pa_xfree(p);
 139
 140     if (c->kill_requested) {
 141         if (c->eof_callback)
 142             c->eof_callback(c, c->userdata);
 143     } else
 144         pa_ioline_puts(line, PROMPT);
 145 }
 146
 147 void pa_cli_set_eof_callback(pa_cli *c, void (*cb)(pa_cli*c, void *userdata), void *userdata) {
 148     assert(c);
 149     c->eof_callback = cb;
 150     c->userdata = userdata;
 151 }