Add quiet support for kldstat -n

PR:		bin/180014
Submitted by:	Olivier Cochard-Labbé <olivier@cochard.me>
MFC after:	1 week

2 files changed, 10 insertions, 4 deletions

diff --git a/sbin/kldstat/kldstat.8 b/sbin/kldstat/kldstat.8
index 6f040e2..bebabe8 100644
--- a/sbin/kldstat/kldstat.8
+++ b/sbin/kldstat/kldstat.8
@@ -25,7 +25,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd September 23, 2005
+.Dd January 22, 2014
 .Dt KLDSTAT 8
 .Os
 .Sh NAME
@@ -33,6 +33,7 @@
 .Nd display status of dynamic kernel linker
 .Sh SYNOPSIS
 .Nm
+.Op Fl q
 .Op Fl v
 .Op Fl i Ar id
 .Op Fl n Ar filename
diff --git a/sbin/kldstat/kldstat.c b/sbin/kldstat/kldstat.c
index 575fca8..8785c00 100644
--- a/sbin/kldstat/kldstat.c
+++ b/sbin/kldstat/kldstat.c
@@ -78,7 +78,7 @@ printfile(int fileid, int verbose)
 static void
 usage(void)
 {
-    fprintf(stderr, "usage: kldstat [-v] [-i id] [-n filename]\n");
+    fprintf(stderr, "usage: kldstat [-q] [-v] [-i id] [-n filename]\n");
     fprintf(stderr, "       kldstat [-q] [-m modname]\n");
     exit(1);
 }
@@ -146,8 +146,13 @@ main(int argc, char** argv)
     }
 
     if (filename != NULL) {
-	if ((fileid = kldfind(filename)) < 0)
-	    err(1, "can't find file %s", filename);
+	if ((fileid = kldfind(filename)) < 0) {
+	    if (!quiet)
+		warn("can't find file %s", filename);
+	    return 1;
+	} else if (quiet) {
+	    return 0;
+	}
     }
 
     printf("Id Refs Address%*c Size     Name\n", POINTER_WIDTH - 7, ' ');