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 <stdlib.h>
  31
  32 #include <pulse/xmalloc.h>
  33
  34 #include <pulsecore/ioline.h>
  35 #include <pulsecore/module.h>
  36 #include <pulsecore/sink.h>
  37 #include <pulsecore/source.h>
  38 #include <pulsecore/client.h>
  39 #include <pulsecore/sink-input.h>
  40 #include <pulsecore/source-output.h>
  41 #include <pulsecore/tokenizer.h>
  42 #include <pulsecore/strbuf.h>
  43 #include <pulsecore/namereg.h>
  44 #include <pulsecore/cli-text.h>
  45 #include <pulsecore/cli-command.h>
  46 #include <pulsecore/log.h>
  47 #include <pulsecore/macro.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     pa_bool_t fail, kill_requested;
  63     int defer_kill;
  64 };
  65
  66 static void line_callback(pa_ioline *line, const char *s, void *userdata);
  67 static void client_kill(pa_client *c);
  68
  69 pa_cli* pa_cli_new(pa_core *core, pa_iochannel *io, pa_module *m) {
  70     char cname[256];
  71     pa_cli *c;
  72     pa_assert(io);
  73
  74     c = pa_xnew(pa_cli, 1);
  75     c->core = core;
  76     pa_assert_se(c->line = pa_ioline_new(io));
  77
  78     c->userdata = NULL;
  79     c->eof_callback = NULL;
  80
  81     pa_iochannel_socket_peer_to_string(io, cname, sizeof(cname));
  82     pa_assert_se(c->client = pa_client_new(core, __FILE__, cname));
  83     c->client->kill = client_kill;
  84     c->client->userdata = c;
  85     c->client->owner = m;
  86
  87     pa_ioline_set_callback(c->line, line_callback, c);
  88     pa_ioline_puts(c->line, "Welcome to PulseAudio! Use \"help\" for usage information.\n"PROMPT);
  89
  90     c->fail = c->kill_requested = FALSE;
  91     c->defer_kill = 0;
  92
  93     return c;
  94 }
  95
  96 void pa_cli_free(pa_cli *c) {
  97     pa_assert(c);
  98
  99     pa_ioline_close(c->line);
 100     pa_ioline_unref(c->line);
 101     pa_client_free(c->client);
 102     pa_xfree(c);
 103 }
 104
 105 static void client_kill(pa_client *client) {
 106     pa_cli *c;
 107
 108     pa_assert(client);
 109     pa_assert_se(c = client->userdata);
 110
 111     pa_log_debug("CLI client killed.");
 112     if (c->defer_kill)
 113         c->kill_requested = TRUE;
 114     else {
 115         if (c->eof_callback)
 116             c->eof_callback(c, c->userdata);
 117     }
 118 }
 119
 120 static void line_callback(pa_ioline *line, const char *s, void *userdata) {
 121     pa_strbuf *buf;
 122     pa_cli *c = userdata;
 123     char *p;
 124
 125     pa_assert(line);
 126     pa_assert(c);
 127
 128     if (!s) {
 129         pa_log_debug("CLI got EOF from user.");
 130         if (c->eof_callback)
 131             c->eof_callback(c, c->userdata);
 132
 133         return;
 134     }
 135
 136     pa_assert_se(buf = pa_strbuf_new());
 137     c->defer_kill++;
 138     pa_cli_command_execute_line(c->core, s, buf, &c->fail);
 139     c->defer_kill--;
 140     pa_ioline_puts(line, p = pa_strbuf_tostring_free(buf));
 141     pa_xfree(p);
 142
 143     if (c->kill_requested) {
 144         if (c->eof_callback)
 145             c->eof_callback(c, c->userdata);
 146     } else
 147         pa_ioline_puts(line, PROMPT);
 148 }
 149
 150 void pa_cli_set_eof_callback(pa_cli *c, void (*cb)(pa_cli*c, void *userdata), void *userdata) {
 151     pa_assert(c);
 152
 153     c->eof_callback = cb;
 154     c->userdata = userdata;
 155 }