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/*
* (c) The University of Glasgow 2002
*
* $Id: system.c,v 1.8 2003/07/02 13:27:35 stolz Exp $
*
* system Runtime Support
*/
/* The itimer stuff in this module is non-posix */
// #include "PosixSource.h"
#include "HsBase.h"
#if defined(mingw32_TARGET_OS)
#include <windows.h>
#include <stdlib.h>
#endif
#ifdef HAVE_VFORK_H
#include <vfork.h>
#endif
#ifdef HAVE_VFORK
#define fork vfork
#endif
HsInt
systemCmd(HsAddr cmd)
{
/* -------------------- WINDOWS VERSION --------------------- */
#if defined(mingw32_TARGET_OS) || defined(cygwin32_TARGET_OS)
return system(cmd);
#else
/* -------------------- UNIX VERSION --------------------- */
int pid;
int wstat;
switch(pid = fork()) {
case -1:
{
return -1;
}
case 0:
{
#ifdef HAVE_SETITIMER
/* Reset the itimers in the child, so it doesn't get plagued
* by SIGVTALRM interrupts.
*/
struct timeval tv_null = { 0, 0 };
struct itimerval itv;
itv.it_interval = tv_null;
itv.it_value = tv_null;
setitimer(ITIMER_REAL, &itv, NULL);
setitimer(ITIMER_VIRTUAL, &itv, NULL);
setitimer(ITIMER_PROF, &itv, NULL);
#endif
/* the child */
execl("/bin/sh", "sh", "-c", cmd, NULL);
_exit(127);
}
}
while (waitpid(pid, &wstat, 0) < 0) {
if (errno != EINTR) {
return -1;
}
}
if (WIFEXITED(wstat))
return WEXITSTATUS(wstat);
else if (WIFSIGNALED(wstat)) {
errno = EINTR;
}
else {
/* This should never happen */
}
return -1;
#endif
}
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