diff options
author | Lorry Tar Creator <lorry-tar-importer@lorry> | 2016-01-20 10:55:18 +0000 |
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committer | Lorry Tar Creator <lorry-tar-importer@lorry> | 2016-01-20 10:55:18 +0000 |
commit | 70e9163c9c18e995515598085cb824e554eb7ae7 (patch) | |
tree | a42dc8b2a6c031354bf31472de888bfc8a060132 /m4/mkstemp.m4 | |
parent | cbf5993c43f49281173f185863577d86bfac6eae (diff) | |
download | coreutils-tarball-master.tar.gz |
coreutils-8.25HEADcoreutils-8.25master
Diffstat (limited to 'm4/mkstemp.m4')
-rw-r--r-- | m4/mkstemp.m4 | 94 |
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 ]) |