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

NAME
     realpath -- returns the canonicalized absolute pathname

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     ##include <>
     ##include <>

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

DESCRIPTION
     The realpath() 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 realpath() 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 realpath() is called.

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

ERORS
     The function realpath() 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).

CAVEATS
     This implementation of realpath() 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 realpath() function first appeared in 4.4BSD.

BSD                            February 16, 1994                           BSD