mirror/transmission
1
0
Fork 0
mirror of https://github.com/transmission/transmission synced 2025-02-12 09:25:03 +00:00
Code Issues Releases Wiki Activity

(trunk daemon) simplify the code in the fallback implementation of daemon() for systems that don't have this function themselves.

Browse source
This commit is contained in:
Jordan Lee 2011-02-18 17:05:17 +00:00
parent e7fc697c90
commit f8b739f0f9
1 changed files with 25 additions and 37 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

50
daemon/daemon.c
View file

@ -173,48 +173,36 @@ static int
tr_daemon( int nochdir, int noclose )
{
#if defined(USE_OS_DAEMON)
return daemon( nochdir, noclose );
#elif defined(USE_TR_DAEMON)
pid_t pid = fork( );
if( pid < 0 )
return -1;
else if( pid > 0 )
_exit( 0 );
else {
pid = setsid( );
if( pid < 0 )
return -1;
pid = fork( );
if( pid < 0 )
return daemon( nochdir, noclose );
#elif defined(USE_TR_DAEMON)
/* this is loosely based off of glibc's daemon() implementation
* http://sourceware.org/git/?p=glibc.git;a=blob_plain;f=misc/daemon.c */
switch( fork( ) ) {
case -1: return -1;
case 0: break;
default: _exit(0);
}
if( setsid( ) == -1 )
return -1;
else if( pid > 0 )
_exit( 0 );
else {
if( !nochdir )
if( chdir( "/" ) < 0 )
return -1;
umask( (mode_t)0 );
chdir( "/" );
if( !noclose ) {
/* send stdin, stdout, and stderr to /dev/null */
int i;
int fd = open( "/dev/null", O_RDWR, 0 );
if( fd < 0 )
fprintf( stderr, "unable to open /dev/null: %s\n", tr_strerror(errno) );
for( i=0; i<3; ++i ) {
if( close( i ) )
return -1;
dup2( fd, i );
}
dup2( fd, STDIN_FILENO );
dup2( fd, STDOUT_FILENO );
dup2( fd, STDERR_FILENO );
close( fd );
}
return 0;
}
}
#else /* USE_NO_DAEMON */
return 0;
#endif