1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
|
/***********************************************************************/
/* */
/* OCaml */
/* */
/* Xavier Leroy, projet Cristal, INRIA Rocquencourt */
/* */
/* Copyright 1996 Institut National de Recherche en Informatique et */
/* en Automatique. All rights reserved. This file is distributed */
/* under the terms of the GNU Library General Public License, with */
/* the special exception on linking described in file ../../LICENSE. */
/* */
/***********************************************************************/
#include <mlvalues.h>
#include <alloc.h>
#include <memory.h>
#include <misc.h>
#include <signals.h>
#include "unixsupport.h"
#include <string.h>
#ifdef HAS_UNISTD
#include <unistd.h>
#endif
#include <fcntl.h>
#ifndef O_NONBLOCK
#define O_NONBLOCK O_NDELAY
#endif
#ifndef O_DSYNC
#define O_DSYNC 0
#endif
#ifndef O_SYNC
#define O_SYNC 0
#endif
#ifndef O_RSYNC
#define O_RSYNC 0
#endif
#ifndef O_CLOEXEC
#define NEED_CLOEXEC_EMULATION
#define O_CLOEXEC 0
#endif
static int open_flag_table[14] = {
O_RDONLY, O_WRONLY, O_RDWR, O_NONBLOCK, O_APPEND, O_CREAT, O_TRUNC, O_EXCL,
O_NOCTTY, O_DSYNC, O_SYNC, O_RSYNC,
0, /* O_SHARE_DELETE, Windows-only */
O_CLOEXEC
};
#ifdef NEED_CLOEXEC_EMULATION
static int open_cloexec_table[14] = {
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0,
0,
1
};
#endif
CAMLprim value unix_open(value path, value flags, value perm)
{
CAMLparam3(path, flags, perm);
int fd, cv_flags;
char * p;
cv_flags = convert_flag_list(flags, open_flag_table);
p = caml_strdup(String_val(path));
/* open on a named FIFO can block (PR#1533) */
enter_blocking_section();
fd = open(p, cv_flags, Int_val(perm));
leave_blocking_section();
stat_free(p);
if (fd == -1) uerror("open", path);
#if defined(NEED_CLOEXEC_EMULATION) && defined(FD_CLOEXEC)
if (convert_flag_list(flags, open_cloexec_table) != 0) {
int flags = fcntl(fd, F_GETFD, 0);
if (flags == -1 ||
fcntl(fd, F_SETFD, flags | FD_CLOEXEC) == -1)
uerror("open", path);
}
#endif
CAMLreturn (Val_int(fd));
}
|
