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authorLorry Tar Creator <lorry-tar-importer@lorry>2016-01-20 10:55:18 +0000
committerLorry Tar Creator <lorry-tar-importer@lorry>2016-01-20 10:55:18 +0000
commit70e9163c9c18e995515598085cb824e554eb7ae7 (patch)
treea42dc8b2a6c031354bf31472de888bfc8a060132 /m4/mkstemp.m4
parentcbf5993c43f49281173f185863577d86bfac6eae (diff)
downloadcoreutils-tarball-master.tar.gz
Diffstat (limited to 'm4/mkstemp.m4')
-rw-r--r--m4/mkstemp.m494
1 files changed, 60 insertions, 34 deletions
diff --git a/m4/mkstemp.m4 b/m4/mkstemp.m4
index 20d8a1b..131e4a7 100644
--- a/m4/mkstemp.m4
+++ b/m4/mkstemp.m4
@@ -1,6 +1,6 @@
-#serial 17
+#serial 23
-# Copyright (C) 2001, 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
+# Copyright (C) 2001, 2003-2007, 2009-2016 Free Software Foundation, Inc.
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.
@@ -10,43 +10,69 @@
# Other systems lack mkstemp altogether.
# On OSF1/Tru64 V4.0F, the system-provided mkstemp function can create
# only 32 files per process.
+# On some hosts, mkstemp creates files with mode 0666, which is a security
+# problem and a violation of POSIX 2008.
# On systems like the above, arrange to use the replacement function.
AC_DEFUN([gl_FUNC_MKSTEMP],
[
AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
- AC_REQUIRE([AC_SYS_LARGEFILE])
+ AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
- AC_CACHE_CHECK([for working mkstemp],
- [gl_cv_func_working_mkstemp],
- [
- mkdir conftest.mkstemp
- AC_RUN_IFELSE(
- [AC_LANG_PROGRAM(
- [AC_INCLUDES_DEFAULT],
- [[int i;
- off_t large = (off_t) 4294967295u;
- if (large < 0)
- large = 2147483647;
- for (i = 0; i < 70; i++)
- {
- char templ[] = "conftest.mkstemp/coXXXXXX";
- int (*mkstemp_function) (char *) = mkstemp;
- int fd = mkstemp_function (templ);
- if (fd < 0 || lseek (fd, large, SEEK_SET) != large)
- return 1;
- close (fd);
- }
- return 0;]])],
- [gl_cv_func_working_mkstemp=yes],
- [gl_cv_func_working_mkstemp=no],
- [gl_cv_func_working_mkstemp=no])
- rm -rf conftest.mkstemp
- ])
-
- if test $gl_cv_func_working_mkstemp != yes; then
- REPLACE_MKSTEMP=1
- AC_LIBOBJ([mkstemp])
- gl_PREREQ_MKSTEMP
+ AC_CHECK_FUNCS_ONCE([mkstemp])
+ if test $ac_cv_func_mkstemp = yes; then
+ AC_CACHE_CHECK([for working mkstemp],
+ [gl_cv_func_working_mkstemp],
+ [
+ mkdir conftest.mkstemp
+ AC_RUN_IFELSE(
+ [AC_LANG_PROGRAM(
+ [AC_INCLUDES_DEFAULT],
+ [[int result = 0;
+ int i;
+ off_t large = (off_t) 4294967295u;
+ if (large < 0)
+ large = 2147483647;
+ umask (0);
+ for (i = 0; i < 70; i++)
+ {
+ char templ[] = "conftest.mkstemp/coXXXXXX";
+ int (*mkstemp_function) (char *) = mkstemp;
+ int fd = mkstemp_function (templ);
+ if (fd < 0)
+ result |= 1;
+ else
+ {
+ struct stat st;
+ if (lseek (fd, large, SEEK_SET) != large)
+ result |= 2;
+ if (fstat (fd, &st) < 0)
+ result |= 4;
+ else if (st.st_mode & 0077)
+ result |= 8;
+ if (close (fd))
+ result |= 16;
+ }
+ }
+ return result;]])],
+ [gl_cv_func_working_mkstemp=yes],
+ [gl_cv_func_working_mkstemp=no],
+ [case "$host_os" in
+ # Guess yes on glibc systems.
+ *-gnu*) gl_cv_func_working_mkstemp="guessing yes" ;;
+ # If we don't know, assume the worst.
+ *) gl_cv_func_working_mkstemp="guessing no" ;;
+ esac
+ ])
+ rm -rf conftest.mkstemp
+ ])
+ case "$gl_cv_func_working_mkstemp" in
+ *yes) ;;
+ *)
+ REPLACE_MKSTEMP=1
+ ;;
+ esac
+ else
+ HAVE_MKSTEMP=0
fi
])