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Diffstat (limited to 'm4/mkfifo.m4')
| -rw-r--r-- | m4/mkfifo.m4 | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/m4/mkfifo.m4 b/m4/mkfifo.m4 new file mode 100644 index 0000000..7d67a29 --- /dev/null +++ b/m4/mkfifo.m4 @@ -0,0 +1,58 @@ +# serial 4 +# See if we need to provide mkfifo replacement. + +dnl Copyright (C) 2009-2015 Free Software Foundation, Inc. +dnl This file is free software; the Free Software Foundation +dnl gives unlimited permission to copy and/or distribute it, +dnl with or without modifications, as long as this notice is preserved. + +# Written by Eric Blake. + +AC_DEFUN([gl_FUNC_MKFIFO], +[ + AC_REQUIRE([gl_SYS_STAT_H_DEFAULTS]) + AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles + AC_CHECK_FUNCS_ONCE([mkfifo]) + if test $ac_cv_func_mkfifo = no; then + HAVE_MKFIFO=0 + else + dnl Check for Solaris 9 and FreeBSD bug with trailing slash. + AC_CHECK_FUNCS_ONCE([lstat]) + AC_CACHE_CHECK([whether mkfifo rejects trailing slashes], + [gl_cv_func_mkfifo_works], + [# Assume that if we have lstat, we can also check symlinks. + if test $ac_cv_func_lstat = yes; then + ln -s conftest.tmp conftest.lnk + fi + AC_RUN_IFELSE( + [AC_LANG_PROGRAM( + [[#include <sys/stat.h> + ]], + [[int result = 0; + if (!mkfifo ("conftest.tmp/", 0600)) + result |= 1; +#if HAVE_LSTAT + if (!mkfifo ("conftest.lnk/", 0600)) + result |= 2; +#endif + return result; + ]])], + [gl_cv_func_mkfifo_works=yes], [gl_cv_func_mkfifo_works=no], + [case "$host_os" in + # Guess yes on glibc systems. + *-gnu*) gl_cv_func_mkfifo_works="guessing yes" ;; + # If we don't know, assume the worst. + *) gl_cv_func_mkfifo_works="guessing no" ;; + esac + ]) + rm -f conftest.tmp conftest.lnk]) + case "$gl_cv_func_mkfifo_works" in + *yes) ;; + *) + AC_DEFINE([MKFIFO_TRAILING_SLASH_BUG], [1], [Define to 1 if mkfifo + does not reject trailing slash]) + REPLACE_MKFIFO=1 + ;; + esac + fi +]) |