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author | Jim Meyering <jim@meyering.net> | 2003-08-10 13:28:38 +0000 |
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committer | Jim Meyering <jim@meyering.net> | 2003-08-10 13:28:38 +0000 |
commit | 8bdd034bd407d264c92464eb0ada4d64e464598e (patch) | |
tree | 5ee6263a43eeeb5347b7536bfce80ee8e19e0cd2 | |
parent | c68ad5dff039842f43028c345af472af869ea3b5 (diff) | |
download | coreutils-8bdd034bd407d264c92464eb0ada4d64e464598e.tar.xz |
(gl_FUNC_UTIMES): New file.
-rw-r--r-- | m4/utimes.m4 | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/m4/utimes.m4 b/m4/utimes.m4 new file mode 100644 index 000000000..ce1a7caf0 --- /dev/null +++ b/m4/utimes.m4 @@ -0,0 +1,46 @@ +# See if we need to work around bugs in glibc's implementation of utimes +# from around July/August 2003. +# First, there was a bug that would make utimes set mtime and atime +# to zero (1970-01-01) unconditionally. +# Then, there is/was code to round rather than truncate. +# +# From Jim Meyering, with suggestions from Paul Eggert. + +AC_DEFUN([gl_FUNC_UTIMES], +[ + AC_CACHE_CHECK([determine whether the utimes function works], + gl_cv_func_working_utimes, + [ + AC_RUN_IFELSE([AC_LANG_SOURCE([[ +#include <sys/types.h> +#include <sys/stat.h> +#include <sys/time.h> +#include <unistd.h> +#include <stdlib.h> +#include <stdio.h> +#include <utime.h> + +int +main () +{ + static struct timeval timeval[2] = {{9, 10}, {999999, 999999}}; + struct stat sbuf; + char const *file = "x"; + FILE *f; + + exit ( ! ((f = fopen (file, "w")) + && fclose (f) == 0 + && utimes (file, timeval) == 0 + && lstat (file, &sbuf) == 0 + && sbuf.st_atime == timeval[0].tv_sec + && sbuf.st_mtime == timeval[1].tv_sec) ); +} + ]])], + [gl_cv_func_working_utimes=yes], + [gl_cv_func_working_utimes=no], + [gl_cv_func_working_utimes=no])]) + + if test $gl_cv_func_working_utimes = yes; then + AC_DEFINE([HAVE_WORKING_UTIMES], 1, [Define if utimes works properly. ]) + fi +]) |