pidof was not returning PIDs of programs which were launched

using a symbolic link. (ie /tmp/sleep when /tmp/sleep links to /usr/bin/sleep).
This is now fixed as we check both the realpath and symbolic path for processes.
In other words, "pidof /tmp/sleep" and "pidof /usr/bin/sleep" will return
the same PIDs when /tmp/sleep is a symbolic link to /usr/bin/sleep.

doc/Changelog

@@ -2,6 +2,11 @@ sysvinit (3.07) released; urgency=low
     * Fixed killall5 so that processes in the omit list are
       not sent any signals, including SIGSTOP.
     * Fixed usage message for killall5 to be more accurate.
+    * pidof was not returning PIDs of programs which were launched
+      using a symbolic link. (ie /tmp/sleep when /tmp/sleep links to /usr/bin/sleep).
+      This is now fixed as we check both the realpath and symbolic path for processes.
+      In other words, "pidof /tmp/sleep" and "pidof /usr/bin/sleep" will return
+      the same PIDs when /tmp/sleep is a symbolic link to /usr/bin/sleep.
 
 
 sysvinit (3.06) released; urgency=low

src/killall5.c

@@ -763,6 +763,11 @@ PIDQ_HEAD *pidof(char *prog)
 				add_pid_to_q(q, p);
 				foundone++;
 			}
+                        else if ( (p->argv0) && (! strcmp(p->argv0, prog) ) )
+                        {
+                            add_pid_to_q(q, p);
+                            foundone++;
+                        }
 		}
 	}
 
@@ -826,6 +831,7 @@ PIDQ_HEAD *pidof(char *prog)
 		 * as was done in earlier versions of this program, since this
 		 * allows /aaa/foo to match /bbb/foo .
 		 */
+
 		ok |=
 			(p->argv0 && strcmp(p->argv0, prog) == 0)
 			|| (p->argv0 && s != prog && strcmp(p->argv0, s) == 0)