[PATCH 1/1] pidof - add option -q (quiet)

[walter harms]

when used in a script no output is needed. The latest version
of pidof supports the -q option to make thinks more easy.

Signed-off-by: walter <wharms at bfs.de>
---
I did not manage to have a usage() , can someone add this ?
---
 procps/pidof.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/procps/pidof.c b/procps/pidof.c
index 5595e34..c6ee357 100644
--- a/procps/pidof.c
+++ b/procps/pidof.c
@@ -69,8 +69,10 @@

 enum {
 	IF_FEATURE_PIDOF_SINGLE(OPTBIT_SINGLE,)
+	                         OPTBIT_QUIET ,
 	IF_FEATURE_PIDOF_OMIT(  OPTBIT_OMIT  ,)
 	OPT_SINGLE = IF_FEATURE_PIDOF_SINGLE((1<<OPTBIT_SINGLE)) + 0,
+	OPT_QUIET   = (1<<OPTBIT_QUIET  ) + 0,
 	OPT_OMIT   = IF_FEATURE_PIDOF_OMIT(  (1<<OPTBIT_OMIT  )) + 0,
 };

@@ -86,6 +88,7 @@ int pidof_main(int argc UNUSED_PARAM, char **argv)
 	/* do unconditional option parsing */
 	opt = getopt32(argv, ""
 			IF_FEATURE_PIDOF_SINGLE ("s")
+			"q"
 			IF_FEATURE_PIDOF_OMIT("o:*", &omits));

 #if ENABLE_FEATURE_PIDOF_OMIT
@@ -121,7 +124,7 @@ int pidof_main(int argc UNUSED_PARAM, char **argv)
 				}
 			}
 #endif
-			printf(" %u" + first, (unsigned)*pl);
+			if (!(opt & OPT_QUIET)) printf(" %u" + first, (unsigned)*pl);
 			first = 0;
 			if (ENABLE_FEATURE_PIDOF_SINGLE && (opt & OPT_SINGLE))
 				break;
@@ -132,7 +135,7 @@ int pidof_main(int argc UNUSED_PARAM, char **argv)
 		free(pidList);
 		argv++;
 	}
-	if (!first)
+	if (!first && !(opt & OPT_QUIET))
 		bb_putchar('\n');

 #if ENABLE_FEATURE_PIDOF_OMIT
-- 
2.1.4