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/*
* ----------------------------------------------------------------------------
* "THE BEER-WARE LICENSE" (Revision 42):
* <phk@login.dkuug.dk> wrote this file. As long as you retain this notice you
* can do whatever you want with this stuff. If we meet some day, and you think
* this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp
* ----------------------------------------------------------------------------
*
* $Id: exec.c,v 1.8.2.1 1994/11/21 03:11:59 phk Exp $
*
*/
#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>
#include <unistd.h>
#include <string.h>
#include <dialog.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/param.h>
#include <sys/mount.h>
#include <sys/reboot.h>
#include "sysinstall.h"
int
exec(int magic, char *cmd, char *args, ...)
{
int pid, w, status;
char *argv[EXEC_MAXARG];
int arg = 0;
va_list ap;
struct stat dummy;
if (stat(cmd, &dummy) == -1) {
Fatal("Executable %s does not exist", cmd);
}
va_start(ap, args);
argv[arg++] = (char *)args;
do {
if (arg >= EXEC_MAXARG)
Fatal("Too many arguments");
} while ((argv[arg++] = va_arg(ap, char *)));
va_end(ap);
if ((pid = fork()) == 0) {
switch (magic) {
case 0:
close(0); dup(debug_fd);
close(1); dup(debug_fd);
close(2); dup(debug_fd);
close(debug_fd);
break;
case 1:
close(2); dup(debug_fd);
close(debug_fd);
break;
case 2:
case 3:
close(debug_fd);
break;
case 4:
close(0) ; open("/stand/sysinstall",O_RDONLY);
close(1) ; open("/mnt/stand/sysinstall",
O_WRONLY|O_CREAT|O_TRUNC,0755);
default:
break;
}
execv(cmd, argv);
exit(1);
}
while ((w = wait(&status)) != pid && w != -1)
;
if ((status >> 8) == 20 && magic == 3) /* special case for bininst */
reboot(RB_AUTOBOOT);
if (w == -1)
Fatal("Child process %s terminated abnormally\n", cmd);
return(status);
}
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