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44 lines
1.3 KiB
Diff
44 lines
1.3 KiB
Diff
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--- ./comsat/comsat.c.orig 2004-06-21 13:50:09.000000000 -0700
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+++ ./comsat/comsat.c 2004-06-21 13:50:52.000000000 -0700
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@@ -69,6 +69,8 @@
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static int debug = 0;
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#define dsyslog if (debug) syslog
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+
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+
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#define MAXIDLE 120
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static char hostname[MAXHOSTNAMELEN];
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@@ -331,6 +333,7 @@
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char line[sizeof(utp->ut_line) + 1]; /* tty name */
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const char *cr; /* line delimiter */
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sigset_t sigset; /* scratch signal mask */
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+ struct passwd *pwbuf; /* passwd information buffer */
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#ifdef USER_PROCESS
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if (utp->ut_type != USER_PROCESS) {
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@@ -371,6 +374,23 @@
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dsyslog(LOG_DEBUG, "%s: wrong mode on %s", name, tty);
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return;
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}
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+ /*
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+ * Ensure the tty is owned by the uid of 'name' to prevent old
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+ * unremoved utmp records referring to user 'x' leading to
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+ * biffage of user 'x''s email to user 'y' where user 'y' is
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+ * logged onto the same terminal that user 'x' previously
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+ * used. T.Crane, 8th June 2004.
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+ */
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+ if ((pwbuf=getpwnam(name))==NULL) {
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+ syslog(LOG_ERR, "get pwname(%s) failed", name);
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+ exit(1);
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+ }
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+ if (pwbuf->pw_uid != stb.st_uid) {
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+ dsyslog(LOG_DEBUG, "Warning: tty uid %d != uid %d for %s on %s\n",
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+ stb.st_uid, pwbuf->pw_uid, name, tty);
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+ return;
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+ }
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+
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dsyslog(LOG_DEBUG, "notify %s on %s\n", name, tty);
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/*
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