From: Todd C. Miller <Todd.Miller@courtesan.com>
Date: Fri, 27 Aug 1999 21:02:24 +0000 (+0000)
Subject: Only block SIGINT, SIGQUIT, SIGTSTP (which can be generated from
X-Git-Tag: SUDO_1_6_0~74
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=61bd59c733f1e6956e7d2413456e5c2baf73a622;p=sudo

Only block SIGINT, SIGQUIT, SIGTSTP (which can be generated from
the keyboard).  Since we run with ruid/euid == 0 the user can't
really signal us in nasty ways.
---

diff --git a/sudo.c b/sudo.c
index efca1bffa..bc39daacc 100644
--- a/sudo.c
+++ b/sudo.c
@@ -201,15 +201,17 @@ main(argc, argv)
 #endif /* POSIX_SIGNALS */
 
     /*
-     * Block signals so the user cannot kill us at some point and
+     * Block signals so the user cannot interrupt us at some point and
      * avoid the logging.
      */
 #ifdef POSIX_SIGNALS
-    (void) sigfillset(&set);
-    (void) sigdelset(&set, SIGCHLD);
+    (void) sigemptyset(&set);
+    (void) sigaddset(&set, SIGINT);
+    (void) sigaddset(&set, SIGQUIT);
+    (void) sigaddset(&set, SIGTSTP);
     (void) sigprocmask(SIG_BLOCK, &set, &oset);
 #else
-    omask = sigblock(sigmask(SIGHUP)|sigmask(SIGINT)|sigmask(SIGQUIT)|sigmask(SIGILL)|sigmask(SIGTSTP));
+    omask = sigblock(sigmask(SIGINT)|sigmask(SIGQUIT)|sigmask(SIGTSTP));
 #endif /* POSIX_SIGNALS */
 
     /*