projects / deliverable / binutils-gdb.git / blame
| Commit | Line | Data |
|---|---|---|
| 7a6dbc2f SDJ |
1 | # open.m4 serial 15 |
| 2 | dnl Copyright (C) 2007-2018 Free Software Foundation, Inc. | |
| 6ec2e0f5 SDJ |
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_OPEN], | |
| 8 | [ | |
| 9 | AC_REQUIRE([AC_CANONICAL_HOST]) | |
| 7a6dbc2f | 10 | AC_REQUIRE([gl_PREPROC_O_CLOEXEC]) |
| 6ec2e0f5 SDJ |
11 | case "$host_os" in |
| 12 | mingw* | pw*) | |
| 13 | REPLACE_OPEN=1 | |
| 14 | ;; | |
| 15 | *) | |
| 16 | dnl open("foo/") should not create a file when the file name has a | |
| 17 | dnl trailing slash. FreeBSD only has the problem on symlinks. | |
| 18 | AC_CHECK_FUNCS_ONCE([lstat]) | |
| 7a6dbc2f SDJ |
19 | if test "$gl_cv_macro_O_CLOEXEC" != yes; then |
| 20 | REPLACE_OPEN=1 | |
| 21 | fi | |
| 6ec2e0f5 SDJ |
22 | AC_CACHE_CHECK([whether open recognizes a trailing slash], |
| 23 | [gl_cv_func_open_slash], | |
| 24 | [# Assume that if we have lstat, we can also check symlinks. | |
| 25 | if test $ac_cv_func_lstat = yes; then | |
| 26 | touch conftest.tmp | |
| 27 | ln -s conftest.tmp conftest.lnk | |
| 28 | fi | |
| 29 | AC_RUN_IFELSE( | |
| 30 | [AC_LANG_SOURCE([[ | |
| 31 | #include <fcntl.h> | |
| 32 | #if HAVE_UNISTD_H | |
| 33 | # include <unistd.h> | |
| 34 | #endif | |
| 35 | int main () | |
| 36 | { | |
| 37 | int result = 0; | |
| 38 | #if HAVE_LSTAT | |
| 39 | if (open ("conftest.lnk/", O_RDONLY) != -1) | |
| 40 | result |= 1; | |
| 41 | #endif | |
| 42 | if (open ("conftest.sl/", O_CREAT, 0600) >= 0) | |
| 43 | result |= 2; | |
| 44 | return result; | |
| 45 | }]])], | |
| 46 | [gl_cv_func_open_slash=yes], | |
| 47 | [gl_cv_func_open_slash=no], | |
| 48 | [ | |
| 49 | changequote(,)dnl | |
| 50 | case "$host_os" in | |
| 51 | freebsd* | aix* | hpux* | solaris2.[0-9] | solaris2.[0-9].*) | |
| 52 | gl_cv_func_open_slash="guessing no" ;; | |
| 53 | *) | |
| 54 | gl_cv_func_open_slash="guessing yes" ;; | |
| 55 | esac | |
| 56 | changequote([,])dnl | |
| 57 | ]) | |
| 58 | rm -f conftest.sl conftest.tmp conftest.lnk | |
| 59 | ]) | |
| 60 | case "$gl_cv_func_open_slash" in | |
| 61 | *no) | |
| 62 | AC_DEFINE([OPEN_TRAILING_SLASH_BUG], [1], | |
| 63 | [Define to 1 if open() fails to recognize a trailing slash.]) | |
| 64 | REPLACE_OPEN=1 | |
| 65 | ;; | |
| 66 | esac | |
| 67 | ;; | |
| 68 | esac | |
| 69 | dnl Replace open() for supporting the gnulib-defined fchdir() function, | |
| 70 | dnl to keep fchdir's bookkeeping up-to-date. | |
| 71 | m4_ifdef([gl_FUNC_FCHDIR], [ | |
| 72 | if test $REPLACE_OPEN = 0; then | |
| 73 | gl_TEST_FCHDIR | |
| 74 | if test $HAVE_FCHDIR = 0; then | |
| 75 | REPLACE_OPEN=1 | |
| 76 | fi | |
| 77 | fi | |
| 78 | ]) | |
| 79 | dnl Replace open() for supporting the gnulib-defined O_NONBLOCK flag. | |
| 80 | m4_ifdef([gl_NONBLOCKING_IO], [ | |
| 81 | if test $REPLACE_OPEN = 0; then | |
| 82 | gl_NONBLOCKING_IO | |
| 83 | if test $gl_cv_have_open_O_NONBLOCK != yes; then | |
| 84 | REPLACE_OPEN=1 | |
| 85 | fi | |
| 86 | fi | |
| 87 | ]) | |
| 88 | ]) | |
| 89 | ||
| 90 | # Prerequisites of lib/open.c. | |
| 91 | AC_DEFUN([gl_PREREQ_OPEN], | |
| 92 | [ | |
| 93 | AC_REQUIRE([gl_PROMOTED_TYPE_MODE_T]) | |
| 94 | : | |
| 95 | ]) |