1#serial 17
2
3# Copyright (C) 2001, 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
4# This file is free software; the Free Software Foundation
5# gives unlimited permission to copy and/or distribute it,
6# with or without modifications, as long as this notice is preserved.
7
8# On some hosts (e.g., HP-UX 10.20, SunOS 4.1.4, Solaris 2.5.1), mkstemp has a
9# silly limit that it can create no more than 26 files from a given template.
10# Other systems lack mkstemp altogether.
11# On OSF1/Tru64 V4.0F, the system-provided mkstemp function can create
12# only 32 files per process.
13# On systems like the above, arrange to use the replacement function.
14AC_DEFUN([gl_FUNC_MKSTEMP],
15[
16  AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
17  AC_REQUIRE([AC_SYS_LARGEFILE])
18
19  AC_CACHE_CHECK([for working mkstemp],
20    [gl_cv_func_working_mkstemp],
21    [
22      mkdir conftest.mkstemp
23      AC_RUN_IFELSE(
24	[AC_LANG_PROGRAM(
25	  [AC_INCLUDES_DEFAULT],
26	  [[int i;
27	    off_t large = (off_t) 4294967295u;
28	    if (large < 0)
29	      large = 2147483647;
30	    for (i = 0; i < 70; i++)
31	      {
32		char templ[] = "conftest.mkstemp/coXXXXXX";
33		int (*mkstemp_function) (char *) = mkstemp;
34		int fd = mkstemp_function (templ);
35		if (fd < 0 || lseek (fd, large, SEEK_SET) != large)
36		  return 1;
37		close (fd);
38	      }
39	    return 0;]])],
40	[gl_cv_func_working_mkstemp=yes],
41	[gl_cv_func_working_mkstemp=no],
42	[gl_cv_func_working_mkstemp=no])
43      rm -rf conftest.mkstemp
44    ])
45
46  if test $gl_cv_func_working_mkstemp != yes; then
47    REPLACE_MKSTEMP=1
48    AC_LIBOBJ([mkstemp])
49    gl_PREREQ_MKSTEMP
50  fi
51])
52
53# Prerequisites of lib/mkstemp.c.
54AC_DEFUN([gl_PREREQ_MKSTEMP],
55[
56])
57