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48e988340f
open("link-to-file/", O_RDONLY) mistakenly succeeds. The previous
patch was enough to fix utimens when no fd is involved, but this is
necessary for futimens to pass.
* m4/open.m4 (gl_FUNC_OPEN): Also detect FreeBSD bug with slash on
symlink.
* doc/posix-functions/open.texi (open): Document the bug.
* doc/posix-functions/utimes.texi (utimes): Likewise.
* tests/test-open.h (test_open): Add parameters, and test symlink
handling.
* tests/test-open.c (main): Adjust caller.
* tests/test-fcntl-safer.c (main): Likewise.
* modules/open-tests (Depends-on): Add stdbool, symlink.
* modules/fcntl-safer-tests (Depends-on): Likewise.
* tests/test-openat.c (main): Add test-open tests.
Signed-off-by: Eric Blake <ebb9@byu.net>
39 lines
1.2 KiB
Plaintext
39 lines
1.2 KiB
Plaintext
@node open
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@section @code{open}
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@findex open
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POSIX specification: @url{http://www.opengroup.org/onlinepubs/9699919799/functions/open.html}
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Gnulib module: open, fchdir
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Portability problems fixed by the Gnulib module open:
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@itemize
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@item
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This function does not fail when the file name argument ends in a slash
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and (without the slash) names a nonexistent file or a file that is not a
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directory, on some platforms:
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FreeBSD 7.2, HP-UX 11.00, Solaris 9, Irix 5.3.
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@item
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On Windows platforms (excluding Cygwin), this function does usually not
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recognize the @file{/dev/null} filename.
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@end itemize
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Portability problems fixed by the Gnulib module fchdir:
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@itemize
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@item
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On Windows platforms (excluding Cygwin), this function fails to open a
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read-only descriptor for directories.
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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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On Windows, this function returns a file handle in @code{O_TEXT} mode by
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default; this means that it translates '\n' to CR/LF by default. Use the
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@code{O_BINARY} flag if you need reliable binary I/O.
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@item
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On platforms where @code{off_t} is a 32-bit type, @code{open} may not work
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correctly with files larger than 2 GB. The fix is to use the
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@code{AC_SYS_LARGEFILE} macro.
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@end itemize
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