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88 lines
1.9 KiB
C
88 lines
1.9 KiB
C
/*
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* ----------------------------------------------------------------------------
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* "THE BEER-WARE LICENSE" (Revision 42):
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* <phk@login.dkuug.dk> wrote this file. As long as you retain this notice you
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* can do whatever you want with this stuff. If we meet some day, and you think
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* this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp
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* ----------------------------------------------------------------------------
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*
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* $Id: exec.c,v 1.7 1994/11/08 18:44:13 jkh Exp $
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*
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <stdarg.h>
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#include <unistd.h>
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#include <string.h>
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#include <dialog.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <sys/param.h>
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#include <sys/mount.h>
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#include <sys/reboot.h>
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#include "sysinstall.h"
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int
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exec(int magic, char *cmd, char *args, ...)
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{
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int pid, w, status;
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char *argv[EXEC_MAXARG];
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int arg = 0;
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va_list ap;
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struct stat dummy;
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if (stat(cmd, &dummy) == -1) {
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sprintf(errmsg, "Executable %s does not exist\n", cmd);
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return(-1);
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}
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va_start(ap, args);
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argv[arg++] = (char *)args;
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do {
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if (arg >= EXEC_MAXARG)
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Fatal("Too many arguments");
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} while ((argv[arg++] = va_arg(ap, char *)));
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va_end(ap);
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if ((pid = fork()) == 0) {
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switch (magic) {
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case 0:
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close(0); dup(debug_fd);
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close(1); dup(debug_fd);
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close(2); dup(debug_fd);
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close(debug_fd);
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break;
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case 1:
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close(2); dup(debug_fd);
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close(debug_fd);
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break;
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case 2:
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case 3:
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close(debug_fd);
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break;
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case 4:
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close(0) ; open("/stand/sysinstall",O_RDONLY);
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close(1) ; open("/mnt/stand/sysinstall",
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O_WRONLY|O_CREAT|O_TRUNC,0755);
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default:
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break;
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}
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execv(cmd, argv);
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exit(1);
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}
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while ((w = wait(&status)) != pid && w != -1)
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;
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if ((status >> 8) == 20 && magic == 3) /* special case for bininst */
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reboot(RB_AUTOBOOT);
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if (w == -1)
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Fatal("Child process %s terminated abnormally\n", cmd);
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return(status);
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}
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