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/* RCS $Id: runargv.c,v 1.3 2007-10-15 15:46:20 ihi Exp $
--
-- SYNOPSIS
-- Invoke a sub process.
--
-- DESCRIPTION
-- Use the standard methods of executing a sub process.
--
-- 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 <signal.h>
#include "extern.h"
#include "sysintf.h"
typedef struct prp {
char *prp_cmd;
int prp_group;
int prp_ignore;
int prp_last;
int prp_shell;
struct prp *prp_next;
} RCP, *RCPPTR;
typedef struct pr {
int pr_valid;
int pr_pid;
CELLPTR pr_target;
int pr_ignore;
int pr_last;
RCPPTR pr_recipe;
RCPPTR pr_recipe_end;
char *pr_dir;
} PR;
static PR *_procs = NIL(PR);
static int _proc_cnt = 0;
static int _abort_flg= FALSE;
static int _use_i = -1;
static int _do_upd = 0;
static void _add_child ANSI((int, CELLPTR, int, int));
static void _attach_cmd ANSI((char *, int, int, CELLPTR, int, int));
static void _finished_child ANSI((int, int));
static int _running ANSI((CELLPTR));
/* iz71422 changed the parameters for runargv but it (and the rest of
* qssl) got *NOT* fixed. */
iz81252 changed the parameters for Pack_argv() and runargv() but this file
did not get fixed!
PUBLIC int
runargv(target, ignore, group, last, shell, cmd)
CELLPTR target;
int ignore;
int group;
int last;
int shell;
char *cmd;
{
extern int errno;
int pid;
char **argv;
if( _running(target) /*&& Max_proc != 1*/ ) {
/* The command will be executed when the previous recipe
* line completes. */
_attach_cmd( cmd, group, ignore, target, last, shell );
return(1);
}
while( _proc_cnt == Max_proc )
if( Wait_for_child(FALSE, -1) == -1 ) Fatal( "Lost a child %d", errno );
argv = Pack_argv( group, shell, cmd );
switch( pid=fork() ){
int wid;
int status;
case -1: /* fork failed */
Error("%s: %s", argv[0], strerror(errno));
Handle_result(-1, ignore, _abort_flg, target);
return(-1);
case 0: /* child */
execvp(argv[0], argv);
Continue = TRUE; /* survive error message */
Error("%s: %s", argv[0], strerror(errno));
kill(getpid(), SIGTERM);
/*NOTREACHED*/
default: /* parent */
_add_child(pid, target, ignore, last);
}
return(1);
}
PUBLIC int
Wait_for_child( abort_flg, pid )
int abort_flg;
int pid;
{
int wid;
int status;
int waitchild;
waitchild = (pid == -1)? FALSE : Wait_for_completion;
do {
if( (wid = wait(&status)) == -1 ) return(-1);
_abort_flg = abort_flg;
_finished_child(wid, status);
_abort_flg = FALSE;
}
while( waitchild && pid != wid );
return(0);
}
PUBLIC void
Clean_up_processes()
{
register int i;
if( _procs != NIL(PR) ) {
for( i=0; i<Max_proc; i++ )
if( _procs[i].pr_valid )
kill(_procs[i].pr_pid, SIGTERM);
while( Wait_for_child(TRUE, -1) != -1 );
}
}
static void
_add_child( pid, target, ignore, last )
int pid;
CELLPTR target;
int ignore;
int last;
{
register int i;
register PR *pp;
if( _procs == NIL(PR) ) {
TALLOC( _procs, Max_proc, PR );
}
if( (i = _use_i) == -1 )
for( i=0; i<Max_proc; i++ )
if( !_procs[i].pr_valid )
break;
pp = _procs+i;
pp->pr_valid = 1;
pp->pr_pid = pid;
pp->pr_target = target;
pp->pr_ignore = ignore;
pp->pr_last = last;
pp->pr_dir = DmStrDup(Get_current_dir());
Current_target = NIL(CELL);
_proc_cnt++;
if( Wait_for_completion ) Wait_for_child( FALSE, pid );
}
static void
_finished_child(pid, status)
int pid;
int status;
{
register int i;
register PR *pp;
char *dir;
for( i=0; i<Max_proc; i++ )
if( _procs[i].pr_valid && _procs[i].pr_pid == pid )
break;
/* Some children we didn't make esp true if using /bin/sh to execute a
* a pipe and feed the output as a makefile into dmake. */
if( i == Max_proc ) return;
_procs[i].pr_valid = 0;
_proc_cnt--;
dir = DmStrDup(Get_current_dir());
Set_dir( _procs[i].pr_dir );
if( _procs[i].pr_recipe != NIL(RCP) && !_abort_flg ) {
RCPPTR rp = _procs[i].pr_recipe;
Current_target = _procs[i].pr_target;
Handle_result( status, _procs[i].pr_ignore, FALSE, _procs[i].pr_target );
Current_target = NIL(CELL);
if ( _procs[i].pr_target->ce_attr & A_ERROR ) {
_procs[i].pr_last = TRUE;
goto ABORT_REMAINDER_OF_RECIPE;
}
_procs[i].pr_recipe = rp->prp_next;
_use_i = i;
runargv( _procs[i].pr_target, rp->prp_ignore, rp->prp_group,
rp->prp_last, rp->prp_shell, rp->prp_cmd );
_use_i = -1;
FREE( rp->prp_cmd );
FREE( rp );
if( _proc_cnt == Max_proc ) Wait_for_child( FALSE, -1 );
}
else {
Handle_result(status,_procs[i].pr_ignore,_abort_flg,_procs[i].pr_target);
ABORT_REMAINDER_OF_RECIPE:
if( _procs[i].pr_last ) {
FREE(_procs[i].pr_dir );
if( !Doing_bang ) Update_time_stamp( _procs[i].pr_target );
}
}
Set_dir(dir);
FREE(dir);
}
static int
_running( cp )
CELLPTR cp;
{
register int i;
if( !_procs ) return(FALSE);
for( i=0; i<Max_proc; i++ )
if( _procs[i].pr_valid &&
_procs[i].pr_target == cp )
break;
return( i != Max_proc );
}
static void
_attach_cmd( cmd, group, ignore, cp, last, shell )
char *cmd;
int group;
int ignore;
CELLPTR cp;
int last;
int shell;
{
register int i;
RCPPTR rp;
for( i=0; i<Max_proc; i++ )
if( _procs[i].pr_valid &&
_procs[i].pr_target == cp )
break;
TALLOC( rp, 1, RCP );
rp->prp_cmd = DmStrDup(cmd);
rp->prp_group = group;
rp->prp_ignore= ignore;
rp->prp_last = last;
rp->prp_shell = shell;
if( _procs[i].pr_recipe == NIL(RCP) )
_procs[i].pr_recipe = _procs[i].pr_recipe_end = rp;
else {
_procs[i].pr_recipe_end->prp_next = rp;
_procs[i].pr_recipe_end = rp;
}
}
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