83 lines
2.4 KiB
C
83 lines
2.4 KiB
C
/***********************************************************************/
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/* */
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/* OCaml */
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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, with */
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/* the special exception on linking described in file ../../LICENSE. */
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/* */
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/***********************************************************************/
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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 <misc.h>
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#include <signals.h>
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#include "unixsupport.h"
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#include <string.h>
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#ifdef HAS_UNISTD
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#include <unistd.h>
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#endif
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#include <fcntl.h>
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#ifndef O_NONBLOCK
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#define O_NONBLOCK O_NDELAY
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#endif
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#ifndef O_DSYNC
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#define O_DSYNC 0
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#endif
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#ifndef O_SYNC
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#define O_SYNC 0
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#endif
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#ifndef O_RSYNC
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#define O_RSYNC 0
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#endif
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#ifndef O_CLOEXEC
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#define NEED_CLOEXEC_EMULATION
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#define O_CLOEXEC 0
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#endif
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static int open_flag_table[14] = {
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O_RDONLY, O_WRONLY, O_RDWR, O_NONBLOCK, O_APPEND, O_CREAT, O_TRUNC, O_EXCL,
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O_NOCTTY, O_DSYNC, O_SYNC, O_RSYNC,
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0, /* O_SHARE_DELETE, Windows-only */
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O_CLOEXEC
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};
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#ifdef NEED_CLOEXEC_EMULATION
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static int open_cloexec_table[14] = {
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0,
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0,
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1
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};
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#endif
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CAMLprim value unix_open(value path, value flags, value perm)
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{
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CAMLparam3(path, flags, perm);
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int fd, cv_flags;
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char * p;
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cv_flags = convert_flag_list(flags, open_flag_table);
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p = caml_strdup(String_val(path));
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/* open on a named FIFO can block (PR#1533) */
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enter_blocking_section();
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fd = open(p, cv_flags, Int_val(perm));
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leave_blocking_section();
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stat_free(p);
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if (fd == -1) uerror("open", path);
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#if defined(NEED_CLOEXEC_EMULATION) && defined(FD_CLOEXEC)
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if (convert_flag_list(flags, open_cloexec_table) != 0) {
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int flags = fcntl(fd, F_GETFD, 0);
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if (flags == -1 ||
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fcntl(fd, F_SETFD, flags | FD_CLOEXEC) == -1)
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uerror("open", path);
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}
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#endif
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CAMLreturn (Val_int(fd));
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}
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