| #serial 23 |
| |
| # 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. |
| |
| # On some hosts (e.g., HP-UX 10.20, SunOS 4.1.4, Solaris 2.5.1), mkstemp has a |
| # silly limit that it can create no more than 26 files from a given template. |
| # 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_CANONICAL_HOST]) dnl for cross-compiles |
| |
| 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 |
| ]) |
| |
| # Prerequisites of lib/mkstemp.c. |
| AC_DEFUN([gl_PREREQ_MKSTEMP], |
| [ |
| ]) |
