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Added lutil_detach()

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This commit is contained in:
Hallvard Furuseth 1998-11-04 23:05:02 +00:00
parent d33c87fc6f
commit 2f33278850
2 changed files with 99 additions and 2 deletions
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4
libraries/liblutil/Makefile.in
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@ -3,8 +3,8 @@
##
LIBRARY = liblutil.a
SRCS = base64.c md5.c sha1.c
OBJS = base64.o md5.o sha1.o @LIBOBJS@
SRCS = base64.c md5.c sha1.c detach.c
OBJS = base64.o md5.o sha1.o detach.o @LIBOBJS@
LDAP_INCDIR= ../../include
LDAP_LIBDIR= ../../libraries

97
libraries/liblutil/detach.c Normal file
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@ -0,0 +1,97 @@
/*
* Copyright (c) 1990, 1994 Regents of the University of Michigan.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that this notice is preserved and that due credit is given
* to the University of Michigan at Ann Arbor. The name of the University
* may not be used to endorse or promote products derived from this
* software without specific prior written permission. This software
* is provided ``as is'' without express or implied warranty.
*/
#include "portable.h"
#include <stdio.h>
#include <ac/signal.h>
#include <ac/unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/file.h>
#include <sys/ioctl.h>
#include "portable.h"
/* I'd really like to make do_close an fd_set, but that isn't portable. */
void
lutil_detach( int debug, int do_close )
{
int i, sd, nbits;
#ifdef HAVE_SYSCONF
nbits = sysconf( _SC_OPEN_MAX );
#elif HAVE_GETDTABLESIZE
nbits = getdtablesize();
#else
nbits = FD_SETSIZE;
#endif
#ifdef FD_SETSIZE
if ( nbits > FD_SETSIZE ) {
nbits = FD_SETSIZE;
}
#endif /* FD_SETSIZE */
if ( debug == 0 ) {
for ( i = 0; i < 5; i++ ) {
#if HAVE_THR
switch ( fork1() )
#else
switch ( fork() )
#endif
{
case -1:
sleep( 5 );
continue;
case 0:
break;
default:
_exit( 0 );
}
break;
}
if ( do_close )
for ( i = 3; i < nbits; i++ )
close( i );
(void) chdir( "/" );
if ( (sd = open( "/dev/null", O_RDWR )) == -1 ) {
perror( "/dev/null" );
exit( 1 );
}
for ( i = 0; i < 3; i++ )
if ( sd != i && isatty( i ) )
(void) dup2( sd, i );
if ( sd > 2 )
close( sd );
#ifdef HAVE_SETSID
(void) setsid();
#else /* HAVE_SETSID */
if ( (sd = open( "/dev/tty", O_RDWR )) != -1 ) {
(void) ioctl( sd, TIOCNOTTY, NULL );
(void) close( sd );
}
#endif /* HAVE_SETSID */
}
(void) SIGNAL( SIGPIPE, SIG_IGN );
}