/* fork.c - fork and exec a process, connecting stdin/out w/pipes */
+/* $OpenLDAP$ */
+/*
+ * Copyright 1998-2003 The OpenLDAP Foundation, All Rights Reserved.
+ * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
+ */
#include "portable.h"
#include <stdio.h>
+#include <ac/errno.h>
#include <ac/string.h>
#include <ac/socket.h>
#include <ac/unistd.h>
#include "slap.h"
#include "shell.h"
-int
+pid_t
forkandexec(
char **args,
FILE **rfp,
FILE **wfp
)
{
- int p2c[2], c2p[2];
- int pid;
+ int p2c[2] = { -1, -1 }, c2p[2];
+ pid_t pid;
if ( pipe( p2c ) != 0 || pipe( c2p ) != 0 ) {
Debug( LDAP_DEBUG_ANY, "pipe failed\n", 0, 0, 0 );
+ close( p2c[0] );
+ close( p2c[1] );
return( -1 );
}
* parent *rfp <- c2p[0] | c2p[1] <- stdout child
*/
- switch ( (pid = fork()) ) {
- case 0: /* child */
- close( p2c[1] );
- close( c2p[0] );
+ fflush( NULL );
+# ifdef HAVE_THR
+ pid = fork1();
+# else
+ pid = fork();
+# endif
+ if ( pid == 0 ) { /* child */
+ /*
+ * child could deadlock here due to resources locked
+ * by our parent
+ *
+ * If so, configure --without-threads.
+ */
if ( dup2( p2c[0], 0 ) == -1 || dup2( c2p[1], 1 ) == -1 ) {
Debug( LDAP_DEBUG_ANY, "dup2 failed\n", 0, 0, 0 );
- exit( -1 );
+ exit( EXIT_FAILURE );
}
-
+ }
+ close( p2c[0] );
+ close( c2p[1] );
+ if ( pid <= 0 ) {
+ close( p2c[1] );
+ close( c2p[0] );
+ }
+ switch ( pid ) {
+ case 0:
execv( args[0], args );
Debug( LDAP_DEBUG_ANY, "execv failed\n", 0, 0, 0 );
- exit( -1 );
+ exit( EXIT_FAILURE );
case -1: /* trouble */
Debug( LDAP_DEBUG_ANY, "fork failed\n", 0, 0, 0 );
return( -1 );
-
- default: /* parent */
- close( p2c[0] );
- close( c2p[1] );
- break;
}
+ /* parent */
if ( (*rfp = fdopen( c2p[0], "r" )) == NULL || (*wfp = fdopen( p2c[1],
"w" )) == NULL ) {
Debug( LDAP_DEBUG_ANY, "fdopen failed\n", 0, 0, 0 );