summaryrefslogtreecommitdiff
path: root/src/util/io.c
blob: 4d1f2e74a1607bf7f6a8977ca97455185eba7403 (plain)
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
83
84
85
86
87
88
89
90
91
92
93
94
95
96
/*
    SSSD

    compact.c

    Authors:
        Lukas Slebodnik <lslebodn@redhat.com>

    Copyright (C) 2012 Red Hat

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#include <unistd.h>
#include <fcntl.h>
#include <errno.h>

#include "util/io.h"

/* CAUTION:
 * This file have to be minimalist and cannot include DEBUG macros
 * or header file util.h.
 */

int sss_open_cloexec(const char *pathname, int flags, int *ret)
{
    int fd;
    int oflags;

    oflags = flags;
#ifdef O_CLOEXEC
    oflags |= O_CLOEXEC;
#endif

    errno = 0;
    fd = open(pathname, oflags);
    if (fd == -1) {
        if (ret) {
            *ret = errno;
        }
        return -1;
    }

#ifndef O_CLOEXEC
    int v;

    v = fcntl(fd, F_GETFD, 0);
    /* we ignore an error, it's not fatal and there is nothing we
     * can do about it anyways */
    (void)fcntl(fd, F_SETFD, v | FD_CLOEXEC);
#endif

    return fd;
}

int sss_openat_cloexec(int dir_fd, const char *pathname, int flags, int *ret)
{
    int fd;
    int oflags;

    oflags = flags;
#ifdef O_CLOEXEC
    oflags |= O_CLOEXEC;
#endif

    errno = 0;
    fd = openat(dir_fd, pathname, oflags);
    if (fd == -1) {
        if (ret) {
            *ret = errno;
        }
        return -1;
    }

#ifndef O_CLOEXEC
    int v;

    v = fcntl(fd, F_GETFD, 0);
    /* we ignore an error, it's not fatal and there is nothing we
     * can do about it anyways */
    (void)fcntl(fd, F_SETFD, v | FD_CLOEXEC);
#endif

    return fd;
}