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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
3ffd4af2 LP |
2 | #pragma once |
3 | ||
4 | /*** | |
5 | This file is part of systemd. | |
6 | ||
7 | Copyright 2010 Lennart Poettering | |
8 | ||
9 | systemd is free software; you can redistribute it and/or modify it | |
10 | under the terms of the GNU Lesser General Public License as published by | |
11 | the Free Software Foundation; either version 2.1 of the License, or | |
12 | (at your option) any later version. | |
13 | ||
14 | systemd is distributed in the hope that it will be useful, but | |
15 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | Lesser General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU Lesser General Public License | |
20 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
21 | ***/ | |
22 | ||
3ffd4af2 LP |
23 | #include <dirent.h> |
24 | #include <stdbool.h> | |
71d35b6b | 25 | #include <stdio.h> |
3ffd4af2 LP |
26 | #include <sys/socket.h> |
27 | ||
28 | #include "macro.h" | |
29 | ||
23e096cc LP |
30 | /* Make sure we can distinguish fd 0 and NULL */ |
31 | #define FD_TO_PTR(fd) INT_TO_PTR((fd)+1) | |
32 | #define PTR_TO_FD(p) (PTR_TO_INT(p)-1) | |
33 | ||
3ffd4af2 LP |
34 | int close_nointr(int fd); |
35 | int safe_close(int fd); | |
36 | void safe_close_pair(int p[]); | |
37 | ||
e7685a77 LP |
38 | static inline int safe_close_above_stdio(int fd) { |
39 | if (fd < 3) /* Don't close stdin/stdout/stderr, but still invalidate the fd by returning -1 */ | |
40 | return -1; | |
41 | ||
42 | return safe_close(fd); | |
43 | } | |
44 | ||
3ffd4af2 LP |
45 | void close_many(const int fds[], unsigned n_fd); |
46 | ||
47 | int fclose_nointr(FILE *f); | |
48 | FILE* safe_fclose(FILE *f); | |
49 | DIR* safe_closedir(DIR *f); | |
50 | ||
51 | static inline void closep(int *fd) { | |
52 | safe_close(*fd); | |
53 | } | |
54 | ||
55 | static inline void close_pairp(int (*p)[2]) { | |
56 | safe_close_pair(*p); | |
57 | } | |
58 | ||
59 | static inline void fclosep(FILE **f) { | |
60 | safe_fclose(*f); | |
61 | } | |
62 | ||
63 | DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, pclose); | |
64 | DEFINE_TRIVIAL_CLEANUP_FUNC(DIR*, closedir); | |
65 | ||
66 | #define _cleanup_close_ _cleanup_(closep) | |
67 | #define _cleanup_fclose_ _cleanup_(fclosep) | |
68 | #define _cleanup_pclose_ _cleanup_(pclosep) | |
69 | #define _cleanup_closedir_ _cleanup_(closedirp) | |
70 | #define _cleanup_close_pair_ _cleanup_(close_pairp) | |
71 | ||
72 | int fd_nonblock(int fd, bool nonblock); | |
73 | int fd_cloexec(int fd, bool cloexec); | |
74 | ||
75 | int close_all_fds(const int except[], unsigned n_except); | |
76 | ||
77 | int same_fd(int a, int b); | |
78 | ||
79 | void cmsg_close_all(struct msghdr *mh); | |
4fee3975 LP |
80 | |
81 | bool fdname_is_valid(const char *s); | |
a1a3f73a | 82 | |
4aeb20f5 LP |
83 | int fd_get_path(int fd, char **ret); |
84 | ||
046a82c1 LP |
85 | int move_fd(int from, int to, int cloexec); |
86 | ||
a548e14d LP |
87 | enum { |
88 | ACQUIRE_NO_DEV_NULL = 1 << 0, | |
89 | ACQUIRE_NO_MEMFD = 1 << 1, | |
90 | ACQUIRE_NO_PIPE = 1 << 2, | |
91 | ACQUIRE_NO_TMPFILE = 1 << 3, | |
92 | ACQUIRE_NO_REGULAR = 1 << 4, | |
93 | }; | |
94 | ||
95 | int acquire_data_fd(const void *data, size_t size, unsigned flags); | |
96 | ||
0791110f | 97 | /* Hint: ENETUNREACH happens if we try to connect to "non-existing" special IP addresses, such as ::5 */ |
a1a3f73a | 98 | #define ERRNO_IS_DISCONNECT(r) \ |
0791110f | 99 | IN_SET(r, ENOTCONN, ECONNRESET, ECONNREFUSED, ECONNABORTED, EPIPE, ENETUNREACH) |
7fe2903c LP |
100 | |
101 | int fd_move_above_stdio(int fd); | |
aa11e28b LP |
102 | |
103 | int rearrange_stdio(int original_input_fd, int original_output_fd, int original_error_fd); | |
8bb2db73 LP |
104 | |
105 | static inline int make_null_stdio(void) { | |
106 | return rearrange_stdio(-1, -1, -1); | |
107 | } | |
c10d6bdb LP |
108 | |
109 | /* Like TAKE_PTR() but for file descriptors, resetting them to -1 */ | |
110 | #define TAKE_FD(fd) \ | |
111 | ({ \ | |
112 | int _fd_ = (fd); \ | |
113 | (fd) = -1; \ | |
114 | _fd_; \ | |
115 | }) |