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@node realpath
@section @code{realpath}
@findex realpath
POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/realpath.html}
Gnulib module: canonicalize-lgpl
Portability problems fixed by Gnulib:
@itemize
@item
This function is missing on some platforms:
mingw, MSVC 9, BeOS.
@item
This function does not allow for a NULL @samp{resolved} parameter on
some platforms:
Mac OS X 10.5, FreeBSD 6.4, OpenBSD 4.4, Solaris 10.
@item
This function does not always return an absolute path on some
platforms:
Solaris 10.
@item
This function fails to detect trailing slashes on non-directories on
some platforms:
glibc 2.3.5.
@item
This function fails to recognize non-directories followed @samp{..} on
some platforms:
cygwin.
@item
This function misbehaves on consecutive slashes on some platforms:
AIX 7.
@end itemize
Portability problems not fixed by Gnulib:
@itemize
@item
This function does not allow to determine the required size of output buffer;
the use of a non-NULL @samp{resolved} buffer is non-portable, since
PATH_MAX, if it is defined, is nothing more than a guess.
@end itemize
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