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realpath(3)

NAME

     realpath -- returns the canonicalized absolute pathname

LIBRARY

     Standard C Library (libc, -lc)

SYNOPSIS

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

     char *
     realpath(const char *pathname, char resolved_path[PATH_MAX]);

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 resolved_path.  The
     resolved_path argument must refer to a buffer capable of storing at least
     PATH_MAX 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 resolved_path on success.	If an error
     occurs, realpath() returns NULL, and resolved_path contains the pathname
     which caused the problem.

ERRORS

     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 resolved_path when given a relative pathname.

SEE ALSO

     getcwd(3)

HISTORY

     The realpath() function first appeared in 4.4BSD.

FreeBSD 5.4		       February 16, 1994		   FreeBSD 5.4

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