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/***********************************************************************/
/* */
/* Objective Caml */
/* */
/* Xavier Leroy, projet Cristal, INRIA Rocquencourt */
/* */
/* Copyright 1996 Institut National de Recherche en Informatique et */
/* en Automatique. Distributed only by permission. */
/* */
/***********************************************************************/
/* $Id$ */
#include <mlvalues.h>
#include <alloc.h>
#include <memory.h>
#include <signals.h>
#include "unixsupport.h"
#include <sys/types.h>
#include <sys/wait.h>
#if !(defined(WIFEXITED) && defined(WEXITSTATUS) && defined(WIFSTOPPED) && \
defined(WSTOPSIG) && defined(WTERMSIG))
/* Assume old-style V7 status word */
#define WIFEXITED(status) (((status) & 0xFF) == 0)
#define WEXITSTATUS(status) (((status) >> 8) & 0xFF)
#define WIFSTOPPED(status) (((status) & 0xFF) == 0xFF)
#define WSTOPSIG(status) (((status) >> 8) & 0xFF)
#define WTERMSIG(status) ((status) & 0x3F)
#endif
#define TAG_WEXITED 0
#define TAG_WSIGNALED 1
#define TAG_WSTOPPED 2
static value alloc_process_status(int pid, int status)
{
value st, res;
if (WIFEXITED(status)) {
st = alloc_small(1, TAG_WEXITED);
Field(st, 0) = Val_int(WEXITSTATUS(status));
}
else if (WIFSTOPPED(status)) {
st = alloc_small(1, TAG_WSTOPPED);
Field(st, 0) = Val_int(WSTOPSIG(status));
}
else {
st = alloc_small(1, TAG_WSIGNALED);
Field(st, 0) = Val_int(WTERMSIG(status));
}
Begin_root (st);
res = alloc_small(2, 0);
Field(res, 0) = Val_int(pid);
Field(res, 1) = st;
End_roots();
return res;
}
value unix_wait(void) /* ML */
{
int pid, status;
enter_blocking_section();
pid = wait(&status);
leave_blocking_section();
if (pid == -1) uerror("wait", Nothing);
return alloc_process_status(pid, status);
}
#if defined(HAS_WAITPID) || defined(HAS_WAIT4)
#ifndef HAS_WAITPID
#define waitpid(pid,status,opts) wait4(pid,status,opts,NULL)
#endif
static int wait_flag_table[] = {
WNOHANG, WUNTRACED
};
value unix_waitpid(value flags, value pid_req)
{
int pid, status;
enter_blocking_section();
pid = waitpid(Int_val(pid_req), &status,
convert_flag_list(flags, wait_flag_table));
leave_blocking_section();
if (pid == -1) uerror("waitpid", Nothing);
return alloc_process_status(pid, status);
}
#else
value unix_waitpid(value flags, value pid_req)
{ invalid_argument("waitpid not implemented"); }
#endif
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