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https://git.openldap.org/openldap/openldap.git
synced 2024-12-21 03:10:25 +08:00
7e6ad5100c
Most function and variable definitions are now preceded by its extern definition, for error checking. Retyped a number of functions, usually to return void. Fixed a number of printf format errors. API changes (in ldap/include): Added avl_dup_ok, avl_prefixapply, removed ber_fatten (probably typo for ber_flatten), retyped ldap_sort_strcasecmp, grew lutil.h. A number of `extern' declarations are left (some added by protoize), to be cleaned away later. Mostly strdup(), strcasecmp(), mktemp(), optind, optarg, errno.
70 lines
1.3 KiB
C
70 lines
1.3 KiB
C
/* fork.c - fork and exec a process, connecting stdin/out w/pipes */
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#include "portable.h"
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#include <stdio.h>
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#include <ac/string.h>
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#include <ac/socket.h>
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#include <ac/unistd.h>
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#include "slap.h"
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#include "shell.h"
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int
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forkandexec(
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char **args,
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FILE **rfp,
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FILE **wfp
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)
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{
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int p2c[2], c2p[2];
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int pid;
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if ( pipe( p2c ) != 0 || pipe( c2p ) != 0 ) {
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Debug( LDAP_DEBUG_ANY, "pipe failed\n", 0, 0, 0 );
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return( -1 );
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}
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/*
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* what we're trying to set up looks like this:
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* parent *wfp -> p2c[1] | p2c[0] -> stdin child
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* parent *rfp <- c2p[0] | c2p[1] <- stdout child
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*/
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switch ( (pid = fork()) ) {
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case 0: /* child */
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close( p2c[1] );
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close( c2p[0] );
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if ( dup2( p2c[0], 0 ) == -1 || dup2( c2p[1], 1 ) == -1 ) {
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Debug( LDAP_DEBUG_ANY, "dup2 failed\n", 0, 0, 0 );
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exit( -1 );
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}
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execv( args[0], args );
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Debug( LDAP_DEBUG_ANY, "execv failed\n", 0, 0, 0 );
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exit( -1 );
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case -1: /* trouble */
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Debug( LDAP_DEBUG_ANY, "fork failed\n", 0, 0, 0 );
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return( -1 );
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default: /* parent */
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close( p2c[0] );
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close( c2p[1] );
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break;
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}
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if ( (*rfp = fdopen( c2p[0], "r" )) == NULL || (*wfp = fdopen( p2c[1],
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"w" )) == NULL ) {
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Debug( LDAP_DEBUG_ANY, "fdopen failed\n", 0, 0, 0 );
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close( c2p[0] );
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close( p2c[1] );
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return( -1 );
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}
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return( pid );
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}
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