Imported from util-linux-2.10s tarball.

[thirdparty/util-linux.git] / login-utils / passwd.c

/* 
 * passwd.c - change password on an account
 *
 * Initially written for Linux by Peter Orbaek <poe@daimi.aau.dk>
 * Currently maintained at ftp://ftp.daimi.aau.dk/pub/linux/poe/
 *
 * Hacked by Alvaro Martinez Echevarria, alvaro@enano.etsit.upm.es,
 * to allow peaceful coexistence with yp. Nov 94.
 *
 * Hacked to allow root to set passwd from command line.
 * by Arpad Magossanyi (mag@tas.vein.hu)
 */

/*
 * Sun Oct 15 13:18:34 1995  Martin Schulze  <joey@finlandia.infodrom.north.de>
 *
 *	I have completely rewritten the whole argument handling (what?)
 *	to support two things. First I wanted "passwd $user $pw" to

        (a very bad idea; command lines are visible to people doing ps
	or running a background job that just collects all command lines)

 *	work and second I wanted simplicity checks to be done for
 *	root, too. Only root can turn this off using the -f
 *	switch. Okay, I started with this to support -V version
 *	information, but one thing comes to the next. *sigh*
 *	In a later step perhaps we'll be able to support shadow
 *	passwords. (?)
 *
 *	I have also included a DEBUG mode (-DDEBUG) to test the
 *	argument handling _without_ any write attempt to
 *	/etc/passwd.
 *
 *	If you're paranoid about security on your system, you may want
 *	to add -DLOGALL to CFLAGS. This will turn on additional syslog
 *	logging of every password change. (user changes are logged as
 *	auth.notice, but changing root's password is logged as
 *	auth.warning. (Of course, the password itself is not logged.)
 */