87 lines
2.3 KiB
C
87 lines
2.3 KiB
C
/***********************************************************************/
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/* */
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/* Caml Special Light */
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/* */
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/* Xavier Leroy, projet Cristal, INRIA Rocquencourt */
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/* */
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/* Copyright 1995 Institut National de Recherche en Informatique et */
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/* Automatique. Distributed only by permission. */
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/* */
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/***********************************************************************/
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/* $Id$ */
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#include <mlvalues.h>
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#include <alloc.h>
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#include <memory.h>
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#include "unix.h"
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#include <sys/types.h>
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#include <sys/wait.h>
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#ifndef WIFEXITED
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#define WIFEXITED(status) ((status) & 0xFF == 0)
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#define WEXITSTATUS(status) (((status) >> 8) & 0xFF)
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#define WIFSTOPPED(status) ((status) & 0xFF == 0xFF)
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#define WSTOPSIG(status) (((status) >> 8) & 0xFF)
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#define WTERMSIG(status) ((status) & 0x3F)
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#endif
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static value alloc_process_status(pid, status)
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int pid, status;
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{
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value st, res;
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Push_roots(r, 1);
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if (WIFEXITED(status)) {
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st = alloc(1, 0);
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Field(st, 0) = Val_int(WEXITSTATUS(status));
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}
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else if (WIFSTOPPED(status)) {
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st = alloc(1, 2);
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Field(st, 0) = Val_int(WSTOPSIG(status));
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}
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else {
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st = alloc(1, 1);
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Field(st, 0) = Val_int(WTERMSIG(status));
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}
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r[0] = st;
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res = alloc_tuple(2);
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Field(res, 0) = Val_int(pid);
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Field(res, 1) = r[0];
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Pop_roots();
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return res;
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}
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value unix_wait() /* ML */
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{
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int pid, status;
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Push_roots(r, 1);
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pid = wait(&status);
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if (pid == -1) uerror("wait", Nothing);
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return alloc_process_status(pid, status);
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}
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#ifdef HAS_WAITPID
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static int wait_flag_table[] = {
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WNOHANG, WUNTRACED
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};
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value unix_waitpid(flags, pid_req)
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value flags, pid_req;
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{
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int pid, status;
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pid = waitpid(Int_val(pid_req), &status,
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convert_flag_list(flags, wait_flag_table));
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if (pid == -1) uerror("waitpid", Nothing);
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return alloc_process_status(pid, status);
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}
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#else
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value unix_waitpid() { invalid_argument("waitpid not implemented"); }
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#endif
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