@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, BeOS.
@item
This function does not allow for a NULL @samp{resolved} parameter on
some platforms:
Solaris.
@item
This function does not always return an absolute path on some
platforms:
Solaris.
@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.
@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