NAME    [Toc]    [Back]

     realpath - returns the canonicalized absolute pathname

LIBRARY    [Toc]    [Back]

     Standard C Library (libc, -lc)

SYNOPSIS    [Toc]    [Back]

     #include <sys/param.h>
     #include <stdlib.h>

     char *
     realpath(const char *pathname, char resolvedname[MAXPATHLEN]);

DESCRIPTION    [Toc]    [Back]

     The realpath() function resolves all symbolic links, extra ``/'' characters
 and references to /./ and /../ in pathname, and copies the resulting
     absolute pathname into the memory referenced by resolvedname.  The
     resolvedname argument must refer to a buffer capable of storing at least
     MAXPATHLEN 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    [Toc]    [Back]

     The realpath() function returns resolvedname on success.  If an error
     occurs, realpath() returns NULL, and resolvedname contains the pathname
     which caused the problem.

ERRORS    [Toc]    [Back]

     The function realpath() may fail and set the external variable errno for
     any of the errors specified for the library functions chdir(2), close(2),
     fchdir(2), lstat(2), open(2), readlink(2) and getcwd(3).

SEE ALSO    [Toc]    [Back]

     getcwd(3)

HISTORY    [Toc]    [Back]

     The realpath() function call first appeared in 4.4BSD.

BUGS    [Toc]    [Back]

     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 resolvedname when given a relative pathname.

BSD                            February 16, 1994                           BSD