mirror of https://gitee.com/openkylin/wget.git
87 lines
3.0 KiB
Plaintext
87 lines
3.0 KiB
Plaintext
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#serial 26
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# Copyright (C) 2001, 2003-2007, 2009-2019 Free Software Foundation, Inc.
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# This file is free software; the Free Software Foundation
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# gives unlimited permission to copy and/or distribute it,
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# with or without modifications, as long as this notice is preserved.
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# On some hosts (e.g., HP-UX 10.20, SunOS 4.1.4, Solaris 2.5.1), mkstemp has a
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# silly limit that it can create no more than 26 files from a given template.
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# Other systems lack mkstemp altogether.
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# On OSF1/Tru64 V4.0F, the system-provided mkstemp function can create
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# only 32 files per process.
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# On some hosts, mkstemp creates files with mode 0666, which is a security
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# problem and a violation of POSIX 2008.
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# On systems like the above, arrange to use the replacement function.
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AC_DEFUN([gl_FUNC_MKSTEMP],
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[
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AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
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AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
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AC_CHECK_FUNCS_ONCE([mkstemp])
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if test $ac_cv_func_mkstemp = yes; then
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AC_CACHE_CHECK([for working mkstemp],
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[gl_cv_func_working_mkstemp],
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[
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mkdir conftest.mkstemp
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AC_RUN_IFELSE(
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[AC_LANG_PROGRAM(
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[AC_INCLUDES_DEFAULT],
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[[int result = 0;
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int i;
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off_t large = (off_t) 4294967295u;
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if (large < 0)
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large = 2147483647;
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umask (0);
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for (i = 0; i < 70; i++)
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{
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char templ[] = "conftest.mkstemp/coXXXXXX";
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int (*mkstemp_function) (char *) = mkstemp;
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int fd = mkstemp_function (templ);
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if (fd < 0)
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result |= 1;
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else
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{
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struct stat st;
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if (lseek (fd, large, SEEK_SET) != large)
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result |= 2;
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if (fstat (fd, &st) < 0)
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result |= 4;
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else if (st.st_mode & 0077)
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result |= 8;
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if (close (fd))
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result |= 16;
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}
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}
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return result;]])],
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[gl_cv_func_working_mkstemp=yes],
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[gl_cv_func_working_mkstemp=no],
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[case "$host_os" in
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# Guess yes on glibc systems.
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*-gnu* | gnu*) gl_cv_func_working_mkstemp="guessing yes" ;;
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# Guess yes on musl systems.
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*-musl*) gl_cv_func_working_mkstemp="guessing yes" ;;
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# Guess no on native Windows.
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mingw*) gl_cv_func_working_mkstemp="guessing no" ;;
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# If we don't know, assume the worst.
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*) gl_cv_func_working_mkstemp="guessing no" ;;
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esac
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])
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rm -rf conftest.mkstemp
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])
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case "$gl_cv_func_working_mkstemp" in
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*yes) ;;
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*)
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REPLACE_MKSTEMP=1
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;;
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esac
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else
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HAVE_MKSTEMP=0
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fi
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])
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# Prerequisites of lib/mkstemp.c.
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AC_DEFUN([gl_PREREQ_MKSTEMP],
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[
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])
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