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utimes() of OS/2 kLIBC has some limitations. 1. OS/2 itself supports a file date since 1980 year in local time. 2. OS/2 itself supports only even seconds for a file time. 3. utimes() of OS/2 kLIBC does not work on an opened file. * m4/utimes.m4: Detect utimes() correctly on OS/2 kLIBC. * doc/posix-functions/utimes.texi: Document the above limitations of utimes() on OS/2 kLIBC.
51 lines
1.4 KiB
Plaintext
51 lines
1.4 KiB
Plaintext
@node utimes
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@section @code{utimes}
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@findex utimes
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POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/utimes.html}
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Gnulib module: ---
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Portability problems fixed by Gnulib:
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@itemize
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@end itemize
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Portability problems not fixed by Gnulib:
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@itemize
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@item
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This function is missing on some platforms:
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Minix 3.1.8, mingw, MSVC 9, Interix 3.5, BeOS.
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@item
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The declaration of this function lacks @code{const} in the second argument
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on some platforms:
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OSF/1 5.1.
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@item
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On some platforms, this function mis-handles trailing slash:
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FreeBSD 7.2, Solaris 9.
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@item
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This function cannot set full timestamp resolution. In particular,
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some platforms incorrectly round rather than truncate. Use
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@code{utimensat(AT_FDCWD,file,times,0)}, or the gnulib module utimens,
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instead.
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@item
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On some platforms, @code{utimes (file, NULL)} fails to set the
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file's timestamp to the current time:
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glibc 2.3.3.
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@item
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On some platforms, @code{utimes} failed on read-only files when
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@code{utime} worked fine.
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glibc 2.2.5.
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@item
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On OS/2, this function cannot set the timestamp to earlier than the
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year 1980 in local time.
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@item
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On OS/2, this function cannot set the timestamp to an odd number of
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seconds.
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@item
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On OS/2, this function does not work on an opened file.
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@end itemize
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Extension: Gnulib provides a module @samp{utimens} that works around these
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problems and allows to set the time with nanosecond resolution (as far as
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supported by the file system).
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