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author | Jakub Slawinski | 2014-07-10 10:24:59 +0200 |
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committer | Jakub Slawinski | 2014-07-10 10:24:59 +0200 |
commit | 46f96ed5e3127394a0cd4dcb961404b792f743b4 (patch) | |
tree | 3e668e32131e8b1896a4a00d742ea21db5a09cf5 /src/daemon.c | |
parent | Initial commit (diff) | |
download | apf-46f96ed5e3127394a0cd4dcb961404b792f743b4.tar.gz |
Initial project structure based on Active Port Forwarder 0.8.4.
Diffstat (limited to 'src/daemon.c')
-rw-r--r-- | src/daemon.c | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/src/daemon.c b/src/daemon.c new file mode 100644 index 0000000..db2195d --- /dev/null +++ b/src/daemon.c @@ -0,0 +1,73 @@ +/* + * active port forwarder - software for secure forwarding + * Copyright (C) 2003-2007 jeremian <jeremian [at] poczta.fm> + * + * This program 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. + * + * This program 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 this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * + */ + +#include "daemon.h" + +#ifndef HAVE_DAEMON + +#ifndef HAVE_THIS_DAEMON +#define HAVE_THIS_DAEMON + +/* + * Function name: daemon + * Description: Enters into daemon mode. It's the emulation of the daemon + * function from the system. + * Arguments: nochdir - when 0, the directory will be changed to /, otherwise + * the directory will be unchanged + * noclose - when 0, the standard streams will be closed, otherwise + * the streams will be unchanged + * Returns: 0 - success, + * -1 - failure. + */ + +int +daemon(int nochdir, int noclose) +{ + int retval; + if ((retval = fork()) == 0) { + /* child process */ + setsid(); + if (nochdir == 0) { + chdir("/"); + } + if (noclose == 0) { + retval = open("/dev/null", O_RDWR); + if (retval == -1) { + return retval; + } + dup2(retval, STDIN_FILENO); + dup2(retval, STDOUT_FILENO); + dup2(retval, STDERR_FILENO); + close(retval); + } + } + else { + /* parent process */ + if (retval == -1) { + return retval; + } + _exit(0); + } + return 0; +} + +#endif + +#endif |