root/usr.bin/vi/pathnames.h
/* Read standard system paths first. */
#include <paths.h>

#ifndef _PATH_EXRC
#define _PATH_EXRC      ".exrc"
#endif

#ifndef _PATH_MSGCAT
#define _PATH_MSGCAT    "/usr/share/vi/catalog/"
#endif

#ifndef _PATH_NEXRC
#define _PATH_NEXRC     ".nexrc"
#endif

/* On linux _PATH_PRESERVE is only writable by root */
#define NVI_PATH_PRESERVE       "/var/tmp/vi.recover/"

#ifndef _PATH_SYSEXRC
#define _PATH_SYSEXRC   "/etc/vi.exrc"
#endif

#ifndef _PATH_TAGS
#define _PATH_TAGS      "tags"
#endif