101 lines
2.8 KiB
C
101 lines
2.8 KiB
C
/***********************************************************************/
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/* */
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/* Objective Caml */
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/* */
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/* Xavier Leroy, projet Cristal, INRIA Rocquencourt */
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/* */
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/* Copyright 1996 Institut National de Recherche en Informatique et */
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/* en Automatique. All rights reserved. This file is distributed */
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/* under the terms of the GNU Library General Public License. */
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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 <signals.h>
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#include "unixsupport.h"
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#include <sys/types.h>
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#include <sys/wait.h>
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#if !(defined(WIFEXITED) && defined(WEXITSTATUS) && defined(WIFSTOPPED) && \
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defined(WSTOPSIG) && defined(WTERMSIG))
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/* Assume old-style V7 status word */
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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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#define TAG_WEXITED 0
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#define TAG_WSIGNALED 1
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#define TAG_WSTOPPED 2
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static value alloc_process_status(int pid, int status)
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{
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value st, res;
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if (WIFEXITED(status)) {
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st = alloc_small(1, TAG_WEXITED);
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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_small(1, TAG_WSTOPPED);
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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_small(1, TAG_WSIGNALED);
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Field(st, 0) = Val_int(WTERMSIG(status));
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}
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Begin_root (st);
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res = alloc_small(2, 0);
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Field(res, 0) = Val_int(pid);
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Field(res, 1) = st;
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End_roots();
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return res;
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}
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value unix_wait(void) /* ML */
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{
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int pid, status;
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enter_blocking_section();
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pid = wait(&status);
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leave_blocking_section();
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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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#if defined(HAS_WAITPID) || defined(HAS_WAIT4)
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#ifndef HAS_WAITPID
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#define waitpid(pid,status,opts) wait4(pid,status,opts,NULL)
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#endif
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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(value flags, value pid_req) /* ML */
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{
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int pid, status;
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enter_blocking_section();
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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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leave_blocking_section();
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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(value flags, value pid_req)
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{ invalid_argument("waitpid not implemented"); }
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#endif
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