summaryrefslogtreecommitdiffstats
path: root/src/main.c
blob: d9967cef2c6b376e7988d349523e61458046690a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
/* $Id$ */

/***
  This file is part of polypaudio.
 
  polypaudio is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published
  by the Free Software Foundation; either version 2 of the License,
  or (at your option) any later version.
 
  polypaudio is distributed in the hope that it will be useful, but
  WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  General Public License for more details.
 
  You should have received a copy of the GNU General Public License
  along with polypaudio; if not, write to the Free Software
  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  USA.
***/

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <signal.h>
#include <stddef.h>
#include <assert.h>
#include <ltdl.h>
#include <memblock.h>

#include "core.h"
#include "mainloop.h"
#include "module.h"
#include "mainloop-signal.h"
#include "cmdline.h"
#include "cli-command.h"
#include "util.h"
#include "sioman.h"

static struct pa_mainloop *mainloop;

static void exit_signal_callback(void *id, int sig, void *userdata) {
    struct pa_mainloop_api* m = pa_mainloop_get_api(mainloop);
    m->quit(m, 1);
    fprintf(stderr, __FILE__": got signal.\n");
}

static void aux_signal_callback(void *id, int sig, void *userdata) {
    struct pa_core *c = userdata;
    assert(c);
    pa_module_load(c, sig == SIGUSR1 ? "module-cli" : "module-cli-protocol-unix", NULL);
}

static void close_pipe(int p[2]) {
    if (p[0] != -1)
        close(p[0]);
    if (p[1] != -1)
        close(p[1]);
    p[0] = p[1] = -1;
}

int main(int argc, char *argv[]) {
    struct pa_core *c;
    struct pa_cmdline *cmdline = NULL;
    struct pa_strbuf *buf = NULL;
    char *s;
    int r, retval = 1;
    int daemon_pipe[2] = { -1, -1 };

    if (!(cmdline = pa_cmdline_parse(argc, argv))) {
        fprintf(stderr, __FILE__": failed to parse command line.\n");
        goto finish;
    }

    if (cmdline->help) {
        pa_cmdline_help(argv[0]);
        retval = 0;
        goto finish;
    }

    if (cmdline->daemonize) {
        pid_t child;

        if (pa_stdio_acquire() < 0) {
            fprintf(stderr, __FILE__": failed to acquire stdio.\n");
            goto finish;
        }

        if (pipe(daemon_pipe) < 0) {
            fprintf(stderr, __FILE__": failed to create pipe.\n");
            goto finish;
        }
        
        if ((child = fork()) < 0) {
            fprintf(stderr, __FILE__": fork() failed: %s\n", strerror(errno));
            goto finish;
        }

        if (child != 0) {
            /* Father */

            close(daemon_pipe[1]);
            daemon_pipe[1] = -1;

            if (pa_loop_read(daemon_pipe[0], &retval, sizeof(retval)) != sizeof(retval)) {
                fprintf(stderr, __FILE__": read() failed: %s\n", strerror(errno));
                retval = 1;
            }

            goto finish;
        }

        close(daemon_pipe[0]);
        daemon_pipe[0] = -1;
        
        setsid();
        setpgrp();
    }
    
    r = lt_dlinit();
    assert(r == 0);
    
    mainloop = pa_mainloop_new();
    assert(mainloop);

    r = pa_signal_init(pa_mainloop_get_api(mainloop));
    assert(r == 0);
    pa_signal_register(SIGINT, exit_signal_callback, NULL);
    signal(SIGPIPE, SIG_IGN);

    c = pa_core_new(pa_mainloop_get_api(mainloop));
    assert(c);
    
    pa_signal_register(SIGUSR1, aux_signal_callback, c);
    pa_signal_register(SIGUSR2, aux_signal_callback, c);

    buf = pa_strbuf_new();
    assert(buf);
    r = pa_cli_command_execute(c, cmdline->cli_commands, buf, &cmdline->fail, &cmdline->verbose);
    fprintf(stderr, s = pa_strbuf_tostring_free(buf));
    free(s);
    
    if (r < 0 && cmdline->fail) {
        fprintf(stderr, __FILE__": failed to initialize daemon.\n");
        if (cmdline->daemonize)
            pa_loop_write(daemon_pipe[1], &retval, sizeof(retval));
    } else if (!c->modules || pa_idxset_ncontents(c->modules) == 0) {
        fprintf(stderr, __FILE__": daemon startup without any loaded modules, refusing to work.\n");
        if (cmdline->daemonize)
            pa_loop_write(daemon_pipe[1], &retval, sizeof(retval));
    } else {
        retval = 0;
        if (cmdline->daemonize)
            pa_loop_write(daemon_pipe[1], &retval, sizeof(retval));
        fprintf(stderr, __FILE__": mainloop entry.\n");
        if (pa_mainloop_run(mainloop, &retval) < 0)
            retval = 1;
        fprintf(stderr, __FILE__": mainloop exit.\n");
    }
        
    pa_core_free(c);

    pa_signal_done();
    pa_mainloop_free(mainloop);
    
    lt_dlexit();

finish:

    if (cmdline)
        pa_cmdline_free(cmdline);

    close_pipe(daemon_pipe);
    
    return retval;
}