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032bd15105
* doc/posix-functions/symlinkat.texi (symlinkat): Mention AIX porting problem. * lib/symlinkat.c: Always include errno.h. (rpl_symlinkat) [HAVE_SYMLINKAT]: New function. * lib/unistd.in.h (symlinkat): Add replacement machinery. * m4/symlinkat.m4 (gl_FUNC_SYMLINKAT): Check symlinkat behavior. * m4/unistd_h.m4 (gl_UNISTD_H_DEFAULTS): Add REPLACE_SYMLINKAT. * modules/symlinkat (Depends-on): Add fstatat if REPLACE_SYMLINKAT. (configure.ac): Also compile replacement if REPLACE_SYMLINKAT. * modules/unistd (unistd.h): Substitute REPLACE_SYMLINKAT.
33 lines
948 B
Plaintext
33 lines
948 B
Plaintext
@node symlinkat
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@section @code{symlinkat}
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@findex symlinkat
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POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/symlinkat.html}
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Gnulib module: symlinkat
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Portability problems fixed by Gnulib:
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@itemize
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@item
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On some systems, @code{symlinkat(value, fd, "name/")} mistakenly creates a
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symlink:
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AIX 7.1.
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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, Solaris 10, 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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Some platforms declare this function in @code{stdio.h} instead of
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@code{unistd.h}:
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Cygwin 1.7.1.
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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 always fails with @samp{ENOSYS} on platforms that don't
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support symlinks:
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mingw, MSVC 9.
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@end itemize
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