Commit | Line | Data |
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95e6d268 | 1 | /* |
c0c0989a | 2 | * SPDX-License-Identifier: LGPL-2.1-only |
95e6d268 | 3 | * |
c0c0989a | 4 | * Copyright (C) 2016 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
95e6d268 MD |
5 | */ |
6 | ||
95e6d268 MD |
7 | #define _LGPL_SOURCE |
8 | #include <limits.h> | |
9 | #include <stdio.h> | |
10 | #include <sys/types.h> | |
11 | #include <unistd.h> | |
12 | #include <ust-fd.h> | |
13 | #include <dlfcn.h> | |
14 | ||
864a1eda | 15 | #include <ust-helper.h> |
95e6d268 | 16 | |
95e6d268 | 17 | static int (*__lttng_ust_fd_plibc_close)(int fd); |
52a20dc7 | 18 | static int (*__lttng_ust_fd_plibc_fclose)(FILE *stream); |
95e6d268 MD |
19 | |
20 | static | |
21 | int _lttng_ust_fd_libc_close(int fd) | |
22 | { | |
23 | if (!__lttng_ust_fd_plibc_close) { | |
24 | __lttng_ust_fd_plibc_close = dlsym(RTLD_NEXT, "close"); | |
25 | if (!__lttng_ust_fd_plibc_close) { | |
26 | fprintf(stderr, "%s\n", dlerror()); | |
27 | return -1; | |
28 | } | |
29 | } | |
30 | return lttng_ust_safe_close_fd(fd, __lttng_ust_fd_plibc_close); | |
31 | } | |
32 | ||
52a20dc7 MD |
33 | static |
34 | int _lttng_ust_fd_libc_fclose(FILE *stream) | |
35 | { | |
36 | if (!__lttng_ust_fd_plibc_fclose) { | |
37 | __lttng_ust_fd_plibc_fclose = dlsym(RTLD_NEXT, "fclose"); | |
38 | if (!__lttng_ust_fd_plibc_fclose) { | |
39 | fprintf(stderr, "%s\n", dlerror()); | |
40 | return -1; | |
41 | } | |
42 | } | |
43 | return lttng_ust_safe_fclose_stream(stream, | |
44 | __lttng_ust_fd_plibc_fclose); | |
45 | } | |
46 | ||
95e6d268 MD |
47 | int close(int fd) |
48 | { | |
49 | return _lttng_ust_fd_libc_close(fd); | |
50 | } | |
51 | ||
52a20dc7 MD |
52 | /* |
53 | * Note: fcloseall() is not an issue because it fcloses only the | |
54 | * streams it knows about, which differs from the problems caused by | |
55 | * gnulib close_stdout(), which does an explicit fclose(stdout). | |
56 | */ | |
57 | int fclose(FILE *stream) | |
58 | { | |
59 | return _lttng_ust_fd_libc_fclose(stream); | |
60 | } | |
61 | ||
95e6d268 MD |
62 | #if defined(__sun__) || defined(__FreeBSD__) |
63 | /* Solaris and FreeBSD. */ | |
64 | void closefrom(int lowfd) | |
65 | { | |
23366626 | 66 | (void) lttng_ust_safe_closefrom_fd(lowfd, __lttng_ust_fd_plibc_close); |
95e6d268 MD |
67 | } |
68 | #elif defined(__NetBSD__) || defined(__OpenBSD__) | |
69 | /* NetBSD and OpenBSD. */ | |
70 | int closefrom(int lowfd) | |
71 | { | |
23366626 | 72 | return lttng_ust_safe_closefrom_fd(lowfd, __lttng_ust_fd_plibc_close); |
95e6d268 MD |
73 | } |
74 | #else | |
75 | /* As far as we know, this OS does not implement closefrom. */ | |
76 | #endif |