diff options
| author | Eric Blake <ebb9@byu.net> | 2009-10-07 11:58:54 -0600 |
|---|---|---|
| committer | Eric Blake <ebb9@byu.net> | 2009-10-10 08:25:15 -0600 |
| commit | 75de3afee5e99c73676c59fb03b1f506b828e3e3 (patch) | |
| tree | 04bee8c41ac61058976ce2493cd2b32c4567a103 /doc/posix-functions/utimensat.texi | |
| parent | b2fb3b5d42009294104f52129fd4c0d7e75202f0 (diff) | |
| download | gnulib-75de3afee5e99c73676c59fb03b1f506b828e3e3.tar.gz | |
doc: mention timestamp portability issues
* doc/glibc-functions/lutimes.texi (lutimes): Refer to utimensat
instead.
* doc/posix-functions/utime.texi (utime): Likewise.
* doc/posix-functions/utimes.texi (utimes): Likewise.
* doc/glibc-functions/futimes.texi (futimes): Refer to futimens
instead.
* doc/posix-functions/futimens.texi (futimens): Mention utimens
module.
* doc/posix-functions/utimensat.texi (utimensat): Likewise.
Mention weakness with symlink timestamps.
* doc/glibc-functions/futimesat.texi (futimesat): New file; refer
to utimensat/futimens instead.
* doc/gnulib.texi (Glibc sys/time.h): Include new file.
Signed-off-by: Eric Blake <ebb9@byu.net>
Diffstat (limited to 'doc/posix-functions/utimensat.texi')
| -rw-r--r-- | doc/posix-functions/utimensat.texi | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/doc/posix-functions/utimensat.texi b/doc/posix-functions/utimensat.texi index 23a5582ad7..1dcfe8c111 100644 --- a/doc/posix-functions/utimensat.texi +++ b/doc/posix-functions/utimensat.texi @@ -15,5 +15,26 @@ Portability problems not fixed by Gnulib: @item This function is missing on some platforms: glibc 2.3.6, MacOS X 10.3, FreeBSD 6.0, NetBSD 3.0, OpenBSD 3.8, AIX -5.1, HP-UX 11, IRIX 6.5, OSF/1 5.1, Solaris 10, Cygwin 1.5.x, mingw, Interix 3.5, BeOS. +5.1, HP-UX 11, IRIX 6.5, OSF/1 5.1, Solaris 10, Cygwin 1.5.x, mingw, +Interix 3.5, BeOS. +@item +This function returns a bogus value instead of failing with +@code{ENOSYS} on some platforms: +Linux kernel 2.6.21. +@item +When using @code{UTIME_OMIT} or @code{UTIME_NOW}, some systems require +the @code{tv_sec} argument to be 0, and don't necessarily handle all +file permissions in the manner required by POSIX: +Linux kernel 2.6.25. +@item +On some platforms, timestamps of symbolic links cannot be modified, so +this function fails with @code{ENOSYS} if passed the flag +@code{AT_SYMLINK_NOFOLLOW}. +@item +The mere act of using @code{lstat} modifies the access time of +symlinks on some platforms, so @code{utimensat} with +@code{AT_SYMLINK_NOFOLLOW} can only effectively change modification time: +Cygwin. @end itemize + +The gnulib module utimens provides a similar interface. |