Added lutil_detach()

libraries/liblutil/Makefile.in

@@ -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

libraries/liblutil/detach.c

+/*
+ * 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 );
+}