code.delx.au - pulseaudio/blob - src/pulsecore/cli.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 <stdio.h>
  27 #include <string.h>
  28 #include <stdlib.h>
  29
  30 #include <pulse/xmalloc.h>
  31
  32 #include <pulsecore/ioline.h>
  33 #include <pulsecore/module.h>
  34 #include <pulsecore/sink.h>
  35 #include <pulsecore/source.h>
  36 #include <pulsecore/client.h>
  37 #include <pulsecore/sink-input.h>
  38 #include <pulsecore/source-output.h>
  39 #include <pulsecore/tokenizer.h>
  40 #include <pulsecore/strbuf.h>
  41 #include <pulsecore/namereg.h>
  42 #include <pulsecore/cli-text.h>
  43 #include <pulsecore/cli-command.h>
  44 #include <pulsecore/log.h>
  45 #include <pulsecore/macro.h>
  46
  47 #include "cli.h"
  48
  49 #define PROMPT ">>> "
  50
  51 struct pa_cli {
  52     pa_core *core;
  53     pa_ioline *line;
  54
  55     pa_cli_eof_cb_t eof_callback;
  56     void *userdata;
  57
  58     pa_client *client;
  59
  60     pa_bool_t fail, kill_requested;
  61     int defer_kill;
  62
  63     char *last_line;
  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_client_new_data data;
  73     pa_client *client;
  74
  75     pa_assert(io);
  76
  77     pa_iochannel_socket_peer_to_string(io, cname, sizeof(cname));
  78
  79     pa_client_new_data_init(&data);
  80     data.driver = __FILE__;
  81     data.module = m;
  82     pa_proplist_sets(data.proplist, PA_PROP_APPLICATION_NAME, cname);
  83     client = pa_client_new(core, &data);
  84     pa_client_new_data_done(&data);
  85
  86     if (!client)
  87         return NULL;
  88
  89     c = pa_xnew(pa_cli, 1);
  90     c->core = core;
  91     c->client = client;
  92     pa_assert_se(c->line = pa_ioline_new(io));
  93
  94     c->userdata = NULL;
  95     c->eof_callback = NULL;
  96
  97     c->client->kill = client_kill;
  98     c->client->userdata = c;
  99
 100     pa_ioline_set_callback(c->line, line_callback, c);
 101     pa_ioline_puts(c->line, "Welcome to PulseAudio! Use \"help\" for usage information.\n"PROMPT);
 102
 103     c->fail = c->kill_requested = FALSE;
 104     c->defer_kill = 0;
 105
 106     c->last_line = NULL;
 107
 108     return c;
 109 }
 110
 111 void pa_cli_free(pa_cli *c) {
 112     pa_assert(c);
 113
 114     pa_ioline_close(c->line);
 115     pa_ioline_unref(c->line);
 116     pa_client_free(c->client);
 117     pa_xfree(c->last_line);
 118     pa_xfree(c);
 119 }
 120
 121 static void client_kill(pa_client *client) {
 122     pa_cli *c;
 123
 124     pa_assert(client);
 125     pa_assert_se(c = client->userdata);
 126
 127     pa_log_debug("CLI client killed.");
 128
 129     if (c->defer_kill)
 130         c->kill_requested = TRUE;
 131     else if (c->eof_callback)
 132         c->eof_callback(c, c->userdata);
 133 }
 134
 135 static void line_callback(pa_ioline *line, const char *s, void *userdata) {
 136     pa_strbuf *buf;
 137     pa_cli *c = userdata;
 138     char *p;
 139
 140     pa_assert(line);
 141     pa_assert(c);
 142
 143     if (!s) {
 144         pa_log_debug("CLI got EOF from user.");
 145
 146         if (c->eof_callback)
 147             c->eof_callback(c, c->userdata);
 148
 149         return;
 150     }
 151
 152     /* Magic command, like they had in AT Hayes Modems! Those were the good days! */
 153     if (pa_streq(s, "/"))
 154         s = c->last_line;
 155     else if (s[0]) {
 156         pa_xfree(c->last_line);
 157         c->last_line = pa_xstrdup(s);
 158     }
 159
 160     pa_assert_se(buf = pa_strbuf_new());
 161     c->defer_kill++;
 162     pa_cli_command_execute_line(c->core, s, buf, &c->fail);
 163     c->defer_kill--;
 164     pa_ioline_puts(line, p = pa_strbuf_tostring_free(buf));
 165     pa_xfree(p);
 166
 167     if (c->kill_requested) {
 168         if (c->eof_callback)
 169             c->eof_callback(c, c->userdata);
 170     } else
 171         pa_ioline_puts(line, PROMPT);
 172 }
 173
 174 void pa_cli_set_eof_callback(pa_cli *c, pa_cli_eof_cb_t cb, void *userdata) {
 175     pa_assert(c);
 176
 177     c->eof_callback = cb;
 178     c->userdata = userdata;
 179 }
 180
 181 pa_module *pa_cli_get_module(pa_cli *c) {
 182     pa_assert(c);
 183
 184     return c->client->module;
 185 }