REALPATH(3) BSD Library Functions Manual REALPATH(3)

NAME
     rreeaallppaatthh - returns the canonicalized absolute pathname

LLIIBBRRAARRYY
     Standard C Library (libc, -lc)

SYNOPSIS
     ##iinncclluuddee <>
     ##iinncclluuddee <>

     char *
     rreeaallppaatthh(const char *pathname, char resolvedpath[PATHMAX]);

DESCRIPTION
     The rreeaallppaatthh() function resolves all symbolic links, extra ``/'' charac-
     ters and references to /./ and /../ in pathname, and copies the resulting
     absolute pathname into the memory referenced by resolvedpath.  The
     resolvedpath argument must refer to a buffer capable of storing at least
     PATHMAX characters.

     The rreeaallppaatthh() function will resolve both absolute and relative paths and
     return the absolute pathname corresponding to pathname.  All but the last
     component of pathname must exist when rreeaallppaatthh() is called.

RETURN VALUES
     The rreeaallppaatthh() function returns resolvedpath on success.  If an error
     occurs, rreeaallppaatthh() returns NULL, and resolvedpath contains the pathname
     which caused the problem.

EERRRROORRSS
     The function rreeaallppaatthh() may fail and set the external variable errno for
     any of the errors specified for the library functions lstat(2),
     readlink(2) and getcwd(3).

CCAAVVEEAATTSS
     This implementation of rreeaallppaatthh() differs slightly from the Solaris
     implementation.  The 4.4BSD version always returns absolute pathnames,
     whereas the Solaris implementation will, under certain circumstances,
     return a relative resolvedpath when given a relative pathname.

SEE ALSO
     getcwd(3)

HISTORY     The rreeaallppaatthh() function first appeared in 4.4BSD.

BSD                            February 16, 1994                           BSD