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/* RCS $Id: runargv.c,v 1.5 2007-10-15 15:43:15 ihi Exp $
--
-- SYNOPSIS
-- Run a sub process.
--
-- DESCRIPTION
-- Use spawn to run a subprocess.
--
-- AUTHOR
-- Dennis Vadura, dvadura@dmake.wticorp.com
--
-- WWW
-- http://dmake.wticorp.com/
--
-- COPYRIGHT
-- Copyright (c) 1996,1997 by WTI Corp. All rights reserved.
--
-- This program is NOT free software; you can redistribute it and/or
-- modify it under the terms of the Software License Agreement Provided
-- in the file <distribution-root>/readme/license.txt.
--
-- LOG
-- Use cvs log to obtain detailed change logs.
*/
#include <process.h>
#include <errno.h>
#include "extern.h"
#include "sysintf.h"
static int _abort_flg = FALSE;
static void _add_child ANSI((CELLPTR, int));
static void _finished_child ANSI((int));
PUBLIC int
runargv(target, group, last, cmnd_attr, cmd)
CELLPTR target;
int group;
int last;
t_attr cmnd_attr; /* Attributes for current cmnd. */
char **cmd; /* Simulate a reference to *cmd. */
{
int ignore = (cmnd_attr & A_IGNORE)!= 0; /* Ignore errors ('-'). */
int shell = (cmnd_attr & A_SHELL) != 0; /* Use shell ('+'). */
int mute = (cmnd_attr & A_MUTE) != 0; /* Mute output ('@@'). */
#if ! defined(_MSC_VER)
#if defined(__BORLANDC__) && __BORLANDC__ >= 0x500
extern char ** _RTLENTRY _EXPDATA environ;
#else
extern char **environ;
#endif
#endif
int status;
char **argv;
int old_stdout = -1; /* For redirecting shell escapes */
int old_stderr = -1; /* and silencing @@-recipes */
char *tcmd = *cmd; /* For saver/easier string arithmetic on *cmd. */
if( Measure & M_RECIPE )
Do_profile_output( "s", M_RECIPE, target );
_add_child(target, ignore);
/* redirect output for _exec_shell / @@-recipes. */
if( Is_exec_shell ) {
/* Add error checking? */
old_stdout = dup(1);
dup2( fileno(stdout_redir), 1 );
}
if( mute ) {
old_stderr = dup(2);
dup2( zerofd, 2 );
if( !Is_exec_shell ) {
old_stdout = dup(1);
dup2( zerofd, 1 );
}
}
/* Return immediately for empty line or noop command. */
if ( !*tcmd || /* empty line */
( strncmp(tcmd, "noop", 4) == 0 && /* noop command */
(iswhite(tcmd[4]) || tcmd[4] == '\0')) ) {
status = 0;
}
else if( !shell && /* internal echo only if not in shell */
strncmp(tcmd, "echo", 4) == 0 &&
(iswhite(tcmd[4]) || tcmd[4] == '\0') ) {
int nl = 1;
tcmd = tcmd + 4;
while( iswhite(*tcmd) ) ++tcmd;
if ( strncmp(tcmd,"-n",2 ) == 0) {
nl = 0;
tcmd = tcmd+2;
while( iswhite(*tcmd) ) ++tcmd;
}
printf("%s%s", tcmd, nl ? "\n" : "");
fflush(stdout);
status = 0;
}
else {
argv = Pack_argv( group, shell, cmd );
Packed_shell = shell||group;
/* The last two arguments would need (const char *const *) casts
* to silence the warning when building with MinGW. */
status = spawnvpe(P_WAIT, *argv, argv, environ);
}
/* Restore stdout/stderr if needed. */
if( old_stdout != -1 ) {
dup2(old_stdout, 1);
if( old_stderr != -1 )
dup2(old_stderr, 2);
}
if( status == -1 ) {
/* spawnvpe failed */
fprintf(stderr, "%s: Error executing '%s': %s",
Pname, argv[0], strerror(errno) );
if( ignore||Continue ) {
fprintf(stderr, " (Ignored)" );
}
fprintf(stderr, "\n");
}
if( Measure & M_RECIPE )
Do_profile_output( "e", M_RECIPE, target );
_finished_child(status);
if( last && !Doing_bang ) Update_time_stamp( target );
return( 0 );
}
PUBLIC void
Clean_up_processes()
{
_abort_flg = TRUE;
_finished_child(-1);
}
PUBLIC int
Wait_for_child( abort_flg, pid )
int abort_flg;
int pid;
{
/* There is currently no parallel processing for this OS, always
* return -1 indicating that there was nothing to wait for. */
return(-1);
}
static int _valid = -1;
static CELLPTR _tg;
static int _ignore;
static void
_add_child( target, ignore )
CELLPTR target;
int ignore;
{
_tg = target;
_ignore = ignore;
_valid = 0;
Current_target = NIL(CELL);
}
static void
_finished_child(status)
int status;
{
if( _valid == -1 ) return;
_valid = -1;
Handle_result( status, _ignore, _abort_flg, _tg );
}
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