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08a713e078
* doc/posix-functions/open.texi (open): * doc/posix-functions/openat.texi (openat): Document that these functions do not set errno to ELOOP when a symlink is opened with O_NOFOLLOW.
39 lines
1.3 KiB
Plaintext
39 lines
1.3 KiB
Plaintext
@node openat
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@section @code{openat}
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@findex openat
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POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/openat.html}
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Gnulib module: openat
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Portability problems 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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glibc 2.3.6, Mac OS X 10.5, FreeBSD 6.0, NetBSD 5.0, OpenBSD 3.8, Minix 3.1.8,
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AIX 5.1, HP-UX 11, IRIX 6.5, OSF/1 5.1, Cygwin 1.5.x, mingw, MSVC 9, Interix 3.5, BeOS.
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But the replacement function is not safe to be used in libraries and is not multithread-safe.
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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. (Cf. @code{AC_SYS_LARGEFILE}.)
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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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Solaris 9.
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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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@code{openat (fd, "symlink", O_NOFOLLOW ...)} fails with @code{errno}
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set to @code{EMLINK} instead of the POSIX-required @code{ELOOP} on
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some platforms:
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FreeBSD 10.1.
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@item
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@code{openat (fd, "symlink", O_NOFOLLOW ...)} fails with @code{errno}
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set to @code{EFTYPE} instead of the POSIX-required @code{ELOOP} on
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some platforms:
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NetBSD 6.1.
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@end itemize
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