/usr/share/aclocal/fcntl-o.m4 is in gettext 0.19.7-2ubuntu3.1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 | # fcntl-o.m4 serial 4
dnl Copyright (C) 2006, 2009-2015 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
dnl Written by Paul Eggert.
# Test whether the flags O_NOATIME and O_NOFOLLOW actually work.
# Define HAVE_WORKING_O_NOATIME to 1 if O_NOATIME works, or to 0 otherwise.
# Define HAVE_WORKING_O_NOFOLLOW to 1 if O_NOFOLLOW works, or to 0 otherwise.
AC_DEFUN([gl_FCNTL_O_FLAGS],
[
dnl Persuade glibc <fcntl.h> to define O_NOATIME and O_NOFOLLOW.
dnl AC_USE_SYSTEM_EXTENSIONS was introduced in autoconf 2.60 and obsoletes
dnl AC_GNU_SOURCE.
m4_ifdef([AC_USE_SYSTEM_EXTENSIONS],
[AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])],
[AC_REQUIRE([AC_GNU_SOURCE])])
AC_CHECK_HEADERS_ONCE([unistd.h])
AC_CHECK_FUNCS_ONCE([symlink])
AC_CACHE_CHECK([for working fcntl.h], [gl_cv_header_working_fcntl_h],
[AC_RUN_IFELSE(
[AC_LANG_PROGRAM(
[[#include <sys/types.h>
#include <sys/stat.h>
#if HAVE_UNISTD_H
# include <unistd.h>
#else /* on Windows with MSVC */
# include <io.h>
# include <stdlib.h>
# defined sleep(n) _sleep ((n) * 1000)
#endif
#include <fcntl.h>
#ifndef O_NOATIME
#define O_NOATIME 0
#endif
#ifndef O_NOFOLLOW
#define O_NOFOLLOW 0
#endif
static int const constants[] =
{
O_CREAT, O_EXCL, O_NOCTTY, O_TRUNC, O_APPEND,
O_NONBLOCK, O_SYNC, O_ACCMODE, O_RDONLY, O_RDWR, O_WRONLY
};
]],
[[
int result = !constants;
#if HAVE_SYMLINK
{
static char const sym[] = "conftest.sym";
if (symlink ("/dev/null", sym) != 0)
result |= 2;
else
{
int fd = open (sym, O_WRONLY | O_NOFOLLOW | O_CREAT, 0);
if (fd >= 0)
{
close (fd);
result |= 4;
}
}
if (unlink (sym) != 0 || symlink (".", sym) != 0)
result |= 2;
else
{
int fd = open (sym, O_RDONLY | O_NOFOLLOW);
if (fd >= 0)
{
close (fd);
result |= 4;
}
}
unlink (sym);
}
#endif
{
static char const file[] = "confdefs.h";
int fd = open (file, O_RDONLY | O_NOATIME);
if (fd < 0)
result |= 8;
else
{
struct stat st0;
if (fstat (fd, &st0) != 0)
result |= 16;
else
{
char c;
sleep (1);
if (read (fd, &c, 1) != 1)
result |= 24;
else
{
if (close (fd) != 0)
result |= 32;
else
{
struct stat st1;
if (stat (file, &st1) != 0)
result |= 40;
else
if (st0.st_atime != st1.st_atime)
result |= 64;
}
}
}
}
}
return result;]])],
[gl_cv_header_working_fcntl_h=yes],
[case $? in #(
4) gl_cv_header_working_fcntl_h='no (bad O_NOFOLLOW)';; #(
64) gl_cv_header_working_fcntl_h='no (bad O_NOATIME)';; #(
68) gl_cv_header_working_fcntl_h='no (bad O_NOATIME, O_NOFOLLOW)';; #(
*) gl_cv_header_working_fcntl_h='no';;
esac],
[gl_cv_header_working_fcntl_h=cross-compiling])])
case $gl_cv_header_working_fcntl_h in #(
*O_NOATIME* | no | cross-compiling) ac_val=0;; #(
*) ac_val=1;;
esac
AC_DEFINE_UNQUOTED([HAVE_WORKING_O_NOATIME], [$ac_val],
[Define to 1 if O_NOATIME works.])
case $gl_cv_header_working_fcntl_h in #(
*O_NOFOLLOW* | no | cross-compiling) ac_val=0;; #(
*) ac_val=1;;
esac
AC_DEFINE_UNQUOTED([HAVE_WORKING_O_NOFOLLOW], [$ac_val],
[Define to 1 if O_NOFOLLOW works.])
])
|