Mercurial > hg > octave-lyh > gnulib-hg
changeset 5596:1d7e763b47de
Work around tests/touch/empty-file failure on a system
(sparc64, Linux-2.4.28, glibc-2.3.3) that didn't honor utimes'
NULL-means-set-to-current-time semantics.
Remove temporary file immediately, rather than waiting
for configure's at-exit trap code to do it.
author | Paul Eggert <eggert@cs.ucla.edu> |
---|---|
date | Tue, 18 Jan 2005 23:52:18 +0000 |
parents | 894ed271946d |
children | ba56441fa7c6 |
files | m4/utimes.m4 |
diffstat | 1 files changed, 28 insertions(+), 2 deletions(-) [+] |
line wrap: on
line diff
--- a/m4/utimes.m4 +++ b/m4/utimes.m4 @@ -1,8 +1,17 @@ +# Detect some bugs in glibc's implementation of utimes. + +dnl Copyright (C) 2003, 2004, 2005 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. + # See if we need to work around bugs in glibc's implementation of # utimes from 2003-07-12 to 2003-09-17. # First, there was a bug that would make utimes set mtime # and atime to zero (1970-01-01) unconditionally. # Then, there was code to round rather than truncate. +# Then, there was an implementation (sparc64, Linux-2.4.28, glibc-2.3.3) +# that didn't honor the NULL-means-set-to-current-time semantics. # # From Jim Meyering, with suggestions from Paul Eggert. @@ -15,6 +24,7 @@ #include <sys/types.h> #include <sys/stat.h> #include <sys/time.h> +#include <time.h> #include <unistd.h> #include <stdlib.h> #include <stdio.h> @@ -27,13 +37,29 @@ struct stat sbuf; char const *file = "conftest.utimes"; FILE *f; + time_t now; - exit ( ! ((f = fopen (file, "w")) + int ok = ((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) ); + && sbuf.st_mtime == timeval[1].tv_sec); + unlink (file); + if (!ok) + exit (1); + + ok = + ((f = fopen (file, "w")) + && fclose (f) == 0 + && time (&now) != (time_t)-1 + && utimes (file, NULL) == 0 + && lstat (file, &sbuf) == 0 + && now - sbuf.st_atime <= 2 + && now - sbuf.st_mtime <= 2); + unlink (file); + + exit (!ok); } ]])], [gl_cv_func_working_utimes=yes],