source: roaraudio/roard/lib.c @ 6056:8d4468a24909

Last change on this file since 6056:8d4468a24909 was 6052:d48765b2475e, checked in by phi, 9 years ago

updated copyright headers

File size: 2.7 KB
Line 
1//lib.c:
2
3/*
4 *      Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2008-2015
5 *
6 *  This file is part of roard a part of RoarAudio,
7 *  a cross-platform sound system for both, home and professional use.
8 *  See README for details.
9 *
10 *  This file is free software; you can redistribute it and/or modify
11 *  it under the terms of the GNU General Public License version 3
12 *  as published by the Free Software Foundation.
13 *
14 *  RoarAudio is distributed in the hope that it will be useful,
15 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
16 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17 *  GNU General Public License for more details.
18 *
19 *  You should have received a copy of the GNU General Public License
20 *  along with this software; see the file COPYING.  If not, write to
21 *  the Free Software Foundation, 51 Franklin Street, Fifth Floor,
22 *  Boston, MA 02110-1301, USA.
23 *
24 */
25
26#include "roard.h"
27
28int lib_run_bg(const char * cmd, const int infh, const int outfh, const int errfh, int * closefh, const size_t lenclose) {
29#ifdef ROAR_HAVE_FORK
30 pid_t child;
31 int fh[3] = {-1, -1, -1};
32 size_t i;
33
34 ROAR_WARN("lib_run_bg(cmd='%s', ...): This function should never be called. Contact devels.", cmd);
35
36 child = roar_fork(NULL);
37
38 if ( child == -1 ) {
39  ROAR_ERR("lib_run_bg(*): Can not fork: %s", strerror(errno));
40  return -1;
41 }
42
43 if ( child ) {
44  // we are the parent!
45  return child;
46 }
47
48 // we are the child.
49
50 // first stop the watchdog.
51 roar_watchdog_stop();
52
53 // then we need to close a lot of open files!
54
55 // before we do this we need to keep backups of our handles:
56 fh[0] = dup(infh);
57 fh[1] = dup(outfh);
58 fh[2] = dup(errfh);
59
60 // TODO: test for errors here.
61
62#ifdef ROAR_SUPPORT_LISTEN
63 for (i = 0; i < ROAR_MAX_LISTEN_SOCKETS; i++)
64  if ( g_listen[i].used )
65   roar_vio_close(&(g_listen[i].sock)); // listen socket.
66#endif
67
68// this breaks the new driver interface
69// clients_free(); // delete all clients!, this allso delets all streams
70
71#ifndef ROAR_WITHOUT_DCOMP_MIDI
72 midi_free(); // close midi devices
73#endif
74
75 // close fh's we got ask to close:
76#ifdef ROAR_HAVE_IO_POSIX
77 for (i = 0; i < lenclose; i++)
78  close(closefh[i]);
79#else
80 if ( lenclose ) {
81  ROAR_WARN("lib_run_bg(*): lenclose > 0 and no way known to close fds");
82 }
83#endif
84
85 // next we need to remap our stdio:
86 // stdio: fh 0..2
87
88 for (i = 0; i < 3; i++) {
89#ifdef ROAR_HAVE_IO_POSIX
90  close(i);
91#endif
92  dup2(fh[i], i); // todo test if this is ok.
93  close(fh[i]);
94 }
95
96 // OK, now we should have set up all our fh properbly, exec our command:
97
98 execl("/bin/sh", "sh", "-c", cmd, (char*)NULL);
99
100 // still alive? BAD!
101 ROAR_ERR("lib_run_bg(*): We are still alive! BAD!");
102 ROAR_U_EXIT(3);
103 return -1;
104#else
105 return -1;
106#endif
107}
108
109//ll
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