Bug#710571: Patch for /lib/lsb/init-functions

[Josh Triplett <josh@joshtriplett.org>]

The attached git patch makes the log_* functions in
/lib/lsb/init-functions check $VERBOSE before outputting anything.

- Josh Triplett

>From b9280a56114591c73fef9899e01aee6cf9d4a78b Mon Sep 17 00:00:00 2001
From: Josh Triplett <josh@joshtriplett.org>
Date: Fri, 31 May 2013 16:38:21 -0700
Subject: [PATCH] init-functions: Check $VERBOSE before generating output from
 log_*

This avoids the need for init scripts to check $VERBOSE before every
invocation of these functions (which they sometimes forget to do, and
which requires sourcing the internal-use-only /lib/init/vars.sh).

Furthermore, eliminating such checks will eventually allow init systems
and output multiplexers to count on unconditional invocations of log_*,
so that they can always collect log data and decide what to do with it.
---
 init-functions |   29 ++++++++++++++++++++++++++++-
 1 file changed, 28 insertions(+), 1 deletion(-)

diff --git a/init-functions b/init-functions
index cb8874c..36de2f5 100644
--- a/init-functions
+++ b/init-functions
@@ -27,6 +27,9 @@
 #OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
 #EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+VERBOSE=$([ -f /lib/init/vars.sh ] && . /lib/init/vars.sh >/dev/null 2>&1 && echo $VERBOSE)
+: ${VERBOSE:=no}
+
 start_daemon () {
     local force nice pidfile exec args OPTIND
     force=""
@@ -276,10 +279,13 @@ init_is_upstart()
 
 # int log_begin_message (char *message)
 log_begin_msg () {
-    log_begin_msg_pre "$@"
     if [ -z "${1:-}" ]; then
         return 1
     fi
+    if [ "$VERBOSE" = no ]; then
+        return 0
+    fi
+    log_begin_msg_pre "$@"
     echo -n "$@" || true
     log_begin_msg_post "$@"
 }
@@ -302,6 +308,9 @@ log_daemon_msg () {
     if [ -z "${1:-}" ]; then
         return 1
     fi
+    if [ "$VERBOSE" = no ]; then
+        return 0
+    fi
     log_daemon_msg_pre "$@"
 
     if [ -z "${2:-}" ]; then
@@ -332,6 +341,9 @@ log_progress_msg () {
     if [ -z "${1:-}" ]; then
         return 1
     fi
+    if [ "$VERBOSE" = no ]; then
+        return 0
+    fi
     echo -n " $@" || true
 }
 
@@ -342,6 +354,9 @@ log_end_msg () {
     if [ -z "${1:-}" ]; then
         return 1
     fi
+    if [ "$VERBOSE" = no ]; then
+        return 0
+    fi
 
     local retval
     retval=$1
@@ -372,22 +387,34 @@ log_end_msg () {
 }
 
 log_action_msg () {
+    if [ "$VERBOSE" = no ]; then
+        return 0
+    fi
     log_action_msg_pre "$@"
     echo "$@." || true
     log_action_msg_post "$@"
 }
 
 log_action_begin_msg () {
+    if [ "$VERBOSE" = no ]; then
+        return 0
+    fi
     log_action_begin_msg_pre "$@"
     echo -n "$@..." || true
     log_action_begin_msg_post "$@"
 }
 
 log_action_cont_msg () {
+    if [ "$VERBOSE" = no ]; then
+        return 0
+    fi
     echo -n "$@..." || true
 }
 
 log_action_end_msg () {
+    if [ "$VERBOSE" = no ]; then
+        return 0
+    fi
     local end
     log_action_end_msg_pre "$@"
     if [ -z "${2:-}" ]; then
-- 
1.7.10.4