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/* @(#)spawn.c 1.18 06/09/13 Copyright 1985, 1989, 1995-2003 J. Schilling */
/*
* Spawn another process/ wait for child process
*
* Copyright (c) 1985, 1989, 1995-2003 J. Schilling
*/
/*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* See the file CDDL.Schily.txt in this distribution for details.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file CDDL.Schily.txt from this distribution.
*/
#include <schily/mconfig.h>
#include <stdio.h>
#include <schily/standard.h>
#define fspawnl __nothing__ /* prototype in schily/schily.h is wrong */
#define spawnl __nothing__ /* prototype in schily/schily.h is wrong */
#include <schily/schily.h>
#undef fspawnl
#undef spawnl
#include <schily/unistd.h>
#include <schily/stdlib.h>
#include <schily/varargs.h>
#include <schily/wait.h>
#include <errno.h>
#define MAX_F_ARGS 16
EXPORT int fspawnl __PR((FILE *, FILE *, FILE *, ...));
EXPORT int
fspawnv(in, out, err, argc, argv)
FILE *in;
FILE *out;
FILE *err;
int argc;
char * const argv[];
{
int pid;
if ((pid = fspawnv_nowait(in, out, err, argv[0], argc, argv)) < 0)
return (pid);
return (wait_chld(pid));
}
/* VARARGS3 */
#ifdef PROTOTYPES
EXPORT int
fspawnl(FILE *in, FILE *out, FILE *err, ...)
#else
EXPORT int
fspawnl(in, out, err, va_alist)
FILE *in;
FILE *out;
FILE *err;
va_dcl
#endif
{
va_list args;
int ac = 0;
char *xav[MAX_F_ARGS];
char **av;
char **pav;
char *p;
int ret;
#ifdef PROTOTYPES
va_start(args, err);
#else
va_start(args);
#endif
while (va_arg(args, char *) != NULL)
ac++;
va_end(args);
if (ac < MAX_F_ARGS) {
pav = av = xav;
} else {
pav = av = (char **)malloc((ac+1)*sizeof (char *));
if (av == 0)
return (-1);
}
#ifdef PROTOTYPES
va_start(args, err);
#else
va_start(args);
#endif
do {
p = va_arg(args, char *);
*pav++ = p;
} while (p != NULL);
va_end(args);
ret = fspawnv(in, out, err, ac, av);
if (av != xav)
free(av);
return (ret);
}
EXPORT int
fspawnv_nowait(in, out, err, name, argc, argv)
FILE *in;
FILE *out;
FILE *err;
const char *name;
int argc;
char * const argv[];
{
int pid = -1; /* Initialization needed to make GCC happy */
int i;
for (i = 1; i < 64; i *= 2) {
if ((pid = fork()) >= 0)
break;
sleep(i);
}
if (pid != 0)
return (pid);
/*
* silly: fexecv must set av[ac] = NULL
* so we have to cast argv tp (char **)
*/
fexecv(name, in, out, err, argc, (char **)argv);
exit(geterrno());
/* NOTREACHED */
#ifndef lint
return (0); /* keep gnu compiler happy */
#endif
}
EXPORT int
wait_chld(pid)
int pid;
{
int died;
WAIT_T status;
do {
do {
died = wait(&status);
} while (died < 0 && geterrno() == EINTR);
if (died < 0)
return (died);
} while (died != pid);
if (WCOREDUMP(status))
unlink("core");
return (WEXITSTATUS(status));
}
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