pidof: support "pidof /path/to/binary" case

function                                             old     new   delta
find_pid_by_name                                     230     227      -3

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

libbb/find_pid_by_name.c

diff --git a/libbb/find_pid_by_name.c b/libbb/find_pid_by_name.c
index abbf293..fe13f72 100644
--- a/libbb/find_pid_by_name.c
+++ b/libbb/find_pid_by_name.c
@@ -90,7 +90,11 @@
 		/* or we require argv0 to match (essential for matching reexeced /proc/self/exe)*/
 		 || (p->argv0 && strcmp(bb_basename(p->argv0), procName) == 0)
 		/* or we require /proc/PID/exe link to match */
-		 || (p->exe && strcmp(bb_basename(p->exe), procName) == 0)
+		 || (p->exe && strcmp(
+					procName[0] == '/' ? p->exe /* support "pidof /path/to/binary" case too */
+							: bb_basename(p->exe),
+					procName
+					) == 0)
 		) {
 			pidList = xrealloc_vector(pidList, 2, i);
 			pidList[i++] = p->pid;