config: add silent mode

Accept -q as the short form of --quiet.
Suppress non-essential standard output if -q is given twice.
Treat log/silent in lvm.conf as equivalent to -qq.
Review all log_print messages and change some to
log_print_unless_silent.

When silent, the following commands still produce output:
dumpconfig, lvdisplay, lvmdiskscan, lvs, pvck, pvdisplay,
pvs, version, vgcfgrestore -l, vgdisplay, vgs.
[Needs checking.]

Non-essential messages are shifted from log level 4 to log level 5
for syslog and lvm2_log_fn purposes.

1 files changed, 12 insertions, 1 deletions

diff --git a/lib/misc/lvm-globals.c b/lib/misc/lvm-globals.c
index 1c72f85a..fe380089 100644
--- a/lib/misc/lvm-globals.c
+++ b/lib/misc/lvm-globals.c
@@ -23,6 +23,7 @@
 #include <stdarg.h>
 
 static int _verbose_level = VERBOSE_BASE_LEVEL;
+static int _silent = 0;
 static int _test = 0;
 static int _md_filtering = 0;
 static int _pvmove = 0;
@@ -54,10 +55,15 @@ void init_verbose(int level)
 	_verbose_level = level;
 }
 
+void init_silent(int silent)
+{
+	_silent = silent;
+}
+
 void init_test(int level)
 {
 	if (!_test && level)
-		log_print("Test mode: Metadata will NOT be updated and volumes will not be (de)activated.");
+		log_warn("TEST MODE: Metadata will NOT be updated and volumes will not be (de)activated.");
 	_test = level;
 }
 
@@ -267,6 +273,11 @@ int debug_level(void)
 	return _debug_level;
 }
 
+int silent_mode(void)
+{
+	return _silent;
+}
+
 unsigned is_static(void)
 {
 	return _is_static;