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/*
* (c) The GRASP/AQUA Project, Glasgow University, 1994-1998
*
* $Id: system.c,v 1.5 1999/03/01 08:57:57 sof Exp $
*
* system Runtime Support
*/
#include "Rts.h"
#include "stgio.h"
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifndef mingw32_TARGET_OS
# ifdef HAVE_SYS_WAIT_H
# include <sys/wait.h>
# endif
#endif
#ifdef HAVE_VFORK_H
#include <vfork.h>
#endif
#ifdef HAVE_VFORK
#define fork vfork
#endif
StgInt
systemCmd(cmd)
StgByteArray cmd;
{
#if defined(mingw32_TARGET_OS)
if (system(cmd) < 0) {
cvtErrno();
stdErrno();
return -1;
}
sleep(1);
return 0;
#else
#if defined(cygwin32_TARGET_OS)
/* The implementation of std. fork() has its problems
under cygwin32-b18, so we fall back on using libc's
system() instead. (It in turn has problems, as it
does not wait until the sub shell has finished before
returning. Using sleep() works around that.)
*/
if (system(cmd) < 0) {
cvtErrno();
stdErrno();
return -1;
}
sleep(1);
return 0;
#else
int pid;
int wstat;
switch(pid = fork()) {
case -1:
if (errno != EINTR) {
cvtErrno();
stdErrno();
return -1;
}
case 0:
/* the child */
execl("/bin/sh", "sh", "-c", cmd, NULL);
_exit(127);
}
while (waitpid(pid, &wstat, 0) < 0) {
if (errno != EINTR) {
cvtErrno();
stdErrno();
return -1;
}
}
if (WIFEXITED(wstat))
return WEXITSTATUS(wstat);
else if (WIFSIGNALED(wstat)) {
ghc_errtype = ERR_INTERRUPTED;
ghc_errstr = "system command interrupted";
}
else {
/* This should never happen */
ghc_errtype = ERR_OTHERERROR;
ghc_errstr = "internal error (process neither exited nor signalled)";
}
return -1;
#endif
#endif
}
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