a324a7f13f
utmp.c to chowntty.c. checkutmp() now only uses an existing utmp entry if the pid matches and ut_line matches with the current tty. This fixes a possible DOS when entries can be forged in the utmp file. * libmisc/chowntty.c, src/login.c, lib/prototypes.h: Remove the tty argument from chown_tty. chown_tty always changes stdin and does not need this argument anymore.