1 /* fork.c - fork and exec a process, connecting stdin/out w/pipes */
4 * Copyright 1998-2003 The OpenLDAP Foundation, All Rights Reserved.
5 * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
13 #include <ac/string.h>
14 #include <ac/socket.h>
15 #include <ac/unistd.h>
27 int p2c[2] = { -1, -1 }, c2p[2];
30 if ( pipe( p2c ) != 0 || pipe( c2p ) != 0 ) {
31 Debug( LDAP_DEBUG_ANY, "pipe failed\n", 0, 0, 0 );
38 * what we're trying to set up looks like this:
39 * parent *wfp -> p2c[1] | p2c[0] -> stdin child
40 * parent *rfp <- c2p[0] | c2p[1] <- stdout child
49 if ( pid == 0 ) { /* child */
51 * child could deadlock here due to resources locked
54 * If so, configure --without-threads.
56 if ( dup2( p2c[0], 0 ) == -1 || dup2( c2p[1], 1 ) == -1 ) {
57 Debug( LDAP_DEBUG_ANY, "dup2 failed\n", 0, 0, 0 );
69 execv( args[0], args );
71 Debug( LDAP_DEBUG_ANY, "execv failed\n", 0, 0, 0 );
74 case -1: /* trouble */
75 Debug( LDAP_DEBUG_ANY, "fork failed\n", 0, 0, 0 );
80 if ( (*rfp = fdopen( c2p[0], "r" )) == NULL || (*wfp = fdopen( p2c[1],
82 Debug( LDAP_DEBUG_ANY, "fdopen failed\n", 0, 0, 0 );