diff options
Diffstat (limited to 'usr.bin/wall')
| -rw-r--r-- | usr.bin/wall/ttymsg.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/usr.bin/wall/ttymsg.c b/usr.bin/wall/ttymsg.c index 5f1545b5e1b..6fe3f9ebb30 100644 --- a/usr.bin/wall/ttymsg.c +++ b/usr.bin/wall/ttymsg.c @@ -1,4 +1,4 @@ -/* $OpenBSD: ttymsg.c,v 1.4 1998/11/18 01:03:16 deraadt Exp $ */ +/* $OpenBSD: ttymsg.c,v 1.5 1998/11/18 02:57:22 deraadt Exp $ */ /* $NetBSD: ttymsg.c,v 1.3 1994/11/17 07:17:55 jtc Exp $ */ /* @@ -38,7 +38,7 @@ #if 0 static char sccsid[] = "@(#)ttymsg.c 8.2 (Berkeley) 11/16/93"; #endif -static char rcsid[] = "$OpenBSD: ttymsg.c,v 1.4 1998/11/18 01:03:16 deraadt Exp $"; +static char rcsid[] = "$OpenBSD: ttymsg.c,v 1.5 1998/11/18 02:57:22 deraadt Exp $"; #endif /* not lint */ #include <sys/types.h> @@ -73,6 +73,7 @@ ttymsg(iov, iovcnt, line, tmout) register int cnt, fd, left, wret; struct iovec localiov[6]; int forked = 0; + struct stat st; if (iovcnt > sizeof(localiov) / sizeof(localiov[0])) return ("too many iov's (change code in wall/ttymsg.c)"); @@ -92,6 +93,11 @@ ttymsg(iov, iovcnt, line, tmout) return (errbuf); } + if (stat(device, &st) < 0) + return (NULL); + if ((st.st_mode & S_IWGRP) == 0) + return (NULL); + seteuid(geteuid()); /* |