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author | RincewindsHat <12514511+RincewindsHat@users.noreply.github.com> | 2023-01-31 14:46:01 +0100 |
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committer | RincewindsHat <12514511+RincewindsHat@users.noreply.github.com> | 2023-01-31 14:46:01 +0100 |
commit | e8bd88d1fcded01ccd066572eeaae1b507989cb3 (patch) | |
tree | c8e7be6c07c6f635f6e803e6a6ba9e7a95fee7c0 /gl/m4/lseek.m4 | |
parent | 2ad962c13473607ca0d974bfaa516a0ed53ec73d (diff) | |
download | monitoring-plugins-e8bd88d1fcded01ccd066572eeaae1b507989cb3.tar.gz |
Sync with the latest Gnulib code 668c0b8ffa
Diffstat (limited to 'gl/m4/lseek.m4')
-rw-r--r-- | gl/m4/lseek.m4 | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/gl/m4/lseek.m4 b/gl/m4/lseek.m4 new file mode 100644 index 00000000..fd4f1f27 --- /dev/null +++ b/gl/m4/lseek.m4 | |||
@@ -0,0 +1,78 @@ | |||
1 | # lseek.m4 serial 12 | ||
2 | dnl Copyright (C) 2007, 2009-2023 Free Software Foundation, Inc. | ||
3 | dnl This file is free software; the Free Software Foundation | ||
4 | dnl gives unlimited permission to copy and/or distribute it, | ||
5 | dnl with or without modifications, as long as this notice is preserved. | ||
6 | |||
7 | AC_DEFUN([gl_FUNC_LSEEK], | ||
8 | [ | ||
9 | AC_REQUIRE([gl_UNISTD_H_DEFAULTS]) | ||
10 | |||
11 | AC_REQUIRE([AC_CANONICAL_HOST]) | ||
12 | AC_REQUIRE([AC_PROG_CC]) | ||
13 | AC_CHECK_HEADERS_ONCE([unistd.h]) | ||
14 | AC_CACHE_CHECK([whether lseek detects pipes], [gl_cv_func_lseek_pipe], | ||
15 | [case "$host_os" in | ||
16 | mingw*) | ||
17 | dnl Native Windows. | ||
18 | dnl The result of lseek (fd, (off_t)0, SEEK_CUR) or | ||
19 | dnl SetFilePointer(handle, 0, NULL, FILE_CURRENT) | ||
20 | dnl for a pipe depends on the environment: In a Cygwin 1.5 | ||
21 | dnl environment it succeeds (wrong); in a Cygwin 1.7 environment | ||
22 | dnl it fails with a wrong errno value. | ||
23 | gl_cv_func_lseek_pipe=no | ||
24 | ;; | ||
25 | *) | ||
26 | if test $cross_compiling = no; then | ||
27 | AC_LINK_IFELSE([AC_LANG_PROGRAM([[ | ||
28 | #include <sys/types.h> /* for off_t */ | ||
29 | #include <stdio.h> /* for SEEK_CUR */ | ||
30 | #if HAVE_UNISTD_H | ||
31 | # include <unistd.h> | ||
32 | #else /* on Windows with MSVC */ | ||
33 | # include <io.h> | ||
34 | #endif | ||
35 | ]GL_MDA_DEFINES], | ||
36 | [[ | ||
37 | /* Exit with success only if stdin is seekable. */ | ||
38 | return lseek (0, (off_t)0, SEEK_CUR) < 0; | ||
39 | ]])], | ||
40 | [if test -s conftest$ac_exeext \ | ||
41 | && ./conftest$ac_exeext < conftest.$ac_ext \ | ||
42 | && test 1 = "`echo hi \ | ||
43 | | { ./conftest$ac_exeext; echo $?; cat >/dev/null; }`"; then | ||
44 | gl_cv_func_lseek_pipe=yes | ||
45 | else | ||
46 | gl_cv_func_lseek_pipe=no | ||
47 | fi | ||
48 | ], | ||
49 | [gl_cv_func_lseek_pipe=no]) | ||
50 | else | ||
51 | AC_COMPILE_IFELSE( | ||
52 | [AC_LANG_SOURCE([[ | ||
53 | #if defined __BEOS__ | ||
54 | /* BeOS mistakenly return 0 when trying to seek on pipes. */ | ||
55 | Choke me. | ||
56 | #endif]])], | ||
57 | [gl_cv_func_lseek_pipe=yes], [gl_cv_func_lseek_pipe=no]) | ||
58 | fi | ||
59 | ;; | ||
60 | esac | ||
61 | ]) | ||
62 | if test "$gl_cv_func_lseek_pipe" = no; then | ||
63 | REPLACE_LSEEK=1 | ||
64 | AC_DEFINE([LSEEK_PIPE_BROKEN], [1], | ||
65 | [Define to 1 if lseek does not detect pipes.]) | ||
66 | fi | ||
67 | |||
68 | AC_REQUIRE([gl_SYS_TYPES_H]) | ||
69 | if test $WINDOWS_64_BIT_OFF_T = 1; then | ||
70 | REPLACE_LSEEK=1 | ||
71 | fi | ||
72 | |||
73 | dnl macOS SEEK_DATA is incompatible with other platforms. | ||
74 | case $host_os in | ||
75 | darwin*) | ||
76 | REPLACE_LSEEK=1;; | ||
77 | esac | ||
78 | ]) | ||