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author | Jim Meyering <jim@meyering.net> | 2005-09-26 09:10:50 +0000 |
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committer | Jim Meyering <jim@meyering.net> | 2005-09-26 09:10:50 +0000 |
commit | 99fa7a0e8e14a0e0711ec1d549668c65ed047b4c (patch) | |
tree | ab7c775e0879317bd6deeaafd5e77e456d630a6b | |
parent | 8149b5a566449d225a3be3d2141b588243289136 (diff) | |
download | coreutils-99fa7a0e8e14a0e0711ec1d549668c65ed047b4c.tar.xz |
(gl_FUNC_UTIMES): Detect the version of utimes
from glibc-2.2.5 that fails for read-only files.
-rw-r--r-- | m4/utimes.m4 | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/m4/utimes.m4 b/m4/utimes.m4 index ba74b3f6e..7efb2b026 100644 --- a/m4/utimes.m4 +++ b/m4/utimes.m4 @@ -12,6 +12,8 @@ dnl with or without modifications, as long as this notice is preserved. # 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. +# Finally, there was also a version of utimes that failed on read-only +# files, while utime worked fine (linux-2.2.20, glibc-2.2.5). # # From Jim Meyering, with suggestions from Paul Eggert. @@ -23,6 +25,7 @@ AC_DEFUN([gl_FUNC_UTIMES], AC_RUN_IFELSE([AC_LANG_SOURCE([[ #include <sys/types.h> #include <sys/stat.h> +#include <fcntl.h> #include <sys/time.h> #include <time.h> #include <unistd.h> @@ -38,6 +41,7 @@ main () char const *file = "conftest.utimes"; FILE *f; time_t now; + int fd; int ok = ((f = fopen (file, "w")) && fclose (f) == 0 @@ -58,6 +62,13 @@ main () && now - sbuf.st_atime <= 2 && now - sbuf.st_mtime <= 2); unlink (file); + if (!ok) + exit (1); + + ok = (0 <= (fd = open (file, O_WRONLY|O_CREAT, 0444)) + && close (fd) == 0 + && utimes (file, NULL) == 0); + unlink (file); exit (!ok); } |