realpath
Hurricane Electric Internet Services
#include <sys/param.h>
char *realpath(file_name, resolved_name)
char *file_name;
char resolved_name[MAXPATHLEN];
DESCRIPTION
realpath() expands all symbolic links and resolves refer-
ences to '/./', '/../' and extra '/' characters in the null
terminated string named by file_name and stores the canoni-
calized absolute pathname in the buffer named by
resolved_name. The resulting path will have no symbolic
links components, nor any '/./' or '/../' components.
RETURN VALUE
If there is no error, it returns a pointer to the
resolved_name.
Otherwise it returns a NULL pointer and places in
resolved_name the absolute pathname of the file_name com-
ponent which could not be resolved. The global variable
errno is set to indicate the error. If any of the parameters
are NULL, errno will be set to EINVAL. realpath() indirectly
invokes the readlink(2) system call and getwd(3) library
call (for relative path names), and errno will be set by
them.
SEE ALSO
readlink(2), getwd(3)
WARNINGS
It indirectly invokes the readlink(2) system call and
getwd(3) library call (for relative path names), and hence
inherits the possibility of hanging due to inaccessible file
system resources.
Hurricane Electric Internet Services
Copyright (C) 1998
Hurricane Electric.
All Rights Reserved.