diff options
Diffstat (limited to 'gnulib/m4/utimensat.m4')
| m--------- | gnulib | 0 | ||||
| -rw-r--r-- | gnulib/m4/utimensat.m4 | 56 |
2 files changed, 56 insertions, 0 deletions
diff --git a/gnulib b/gnulib deleted file mode 160000 -Subproject 4fc10daa05477586fea99b6b3ca02a87d1102fa diff --git a/gnulib/m4/utimensat.m4 b/gnulib/m4/utimensat.m4 new file mode 100644 index 00000000..1110e07c --- /dev/null +++ b/gnulib/m4/utimensat.m4 @@ -0,0 +1,56 @@ +# serial 3 +# See if we need to provide utimensat replacement. + +dnl Copyright (C) 2009, 2010 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_UTIMENSAT], +[ + AC_REQUIRE([gl_SYS_STAT_H_DEFAULTS]) + AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS]) + AC_CHECK_FUNCS_ONCE([utimensat]) + if test $ac_cv_func_utimensat = no; then + HAVE_UTIMENSAT=0 + AC_LIBOBJ([utimensat]) + else + AC_CACHE_CHECK([whether utimensat works], + [gl_cv_func_utimensat_works], + [AC_RUN_IFELSE([AC_LANG_PROGRAM([[ +#include <fcntl.h> +#include <sys/stat.h> +#include <unistd.h> +]], [[struct timespec ts[2] = { { 1, UTIME_OMIT }, { 1, UTIME_NOW } }; + struct stat st; + const char *f = "conftest.file"; + if (close (creat (f, 0600))) return 1; + if (utimensat (AT_FDCWD, f, NULL, AT_SYMLINK_NOFOLLOW)) return 2; + if (utimensat (AT_FDCWD, f, ts, 0)) return 3; + sleep (1); + ts[0].tv_nsec = UTIME_NOW; + ts[1].tv_nsec = UTIME_OMIT; + if (utimensat (AT_FDCWD, f, ts, 0)) return 4; + if (stat (f, &st)) return 5; + if (st.st_ctime < st.st_atime) return 6;]])], +dnl FIXME: simplify this in 2012, when file system bugs are no longer common + [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ +#ifdef __linux__ +/* The Linux kernel added utimensat in 2.6.22, but has bugs with UTIME_OMIT + in several file systems as recently as 2.6.32. Always replace utimensat + to support older kernels. */ +choke me +#endif + ]])], + [gl_cv_func_utimensat_works=yes], + [gl_cv_func_utimensat_works="needs runtime check"])], + [gl_cv_func_utimensat_works=no], + [gl_cv_func_utimensat_works="guessing no"])]) + if test "$gl_cv_func_utimensat_works" != yes; then + REPLACE_UTIMENSAT=1 + AC_LIBOBJ([utimensat]) + fi + fi +]) |