/* * myname.c - determine the current username and get the passwd entry * * Copyright (C) 1996 Marek Michalkiewicz * * This code may be freely used, modified and distributed for any purpose. * There is no warranty, if it breaks you have to keep both pieces, etc. * If you improve it, please send me your changes. Thanks! */ #include #include "rcsid.h" RCSID("$Id: myname.c,v 1.2 1997/12/07 23:27:07 marekm Exp $") #include "defines.h" #include #include "prototypes.h" struct passwd * get_my_pwent(void) { struct passwd *pw; const char *cp = getlogin(); uid_t ruid = getuid(); /* * Try getlogin() first - if it fails or returns a non-existent * username, or a username which doesn't match the real UID, fall * back to getpwuid(getuid()). This should work reasonably with * usernames longer than the utmp limit (8 characters), as well as * shared UIDs - but not both at the same time... * * XXX - when running from su, will return the current user (not * the original user, like getlogin() does). Does this matter? */ if (cp && *cp && (pw = getpwnam(cp)) && pw->pw_uid == ruid) return pw; return getpwuid(ruid); }