Added lutil_detach()

diff --git a/libraries/liblutil/Makefile.in b/libraries/liblutil/Makefile.in
index 9596b2af7beb4b10ff24791201e06defb9bfd542..80b5420e56a8aab8b14e02c84d126d37069ce32c 100644 (file)
--- a/libraries/liblutil/Makefile.in
+++ b/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

diff --git a/libraries/liblutil/detach.c b/libraries/liblutil/detach.c
new file mode 100644 (file)
index 0000000..72ec997
--- /dev/null
+++ b/libraries/liblutil/detach.c
@@ -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 );
+}