Fix up all use of /dev/stderr for portability to busybox /bin/sh

The typical shell on a small embedded target using busybox does
not have support for /dev/stderr.  A more portable way to send
output to stderr with echo is to redirect stdout to stderr with
1>&2.

Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

diff --git a/lttctl/ltt-armall.sh b/lttctl/ltt-armall.sh
index d2548b86a610ce193656bc419dac0ef87dd6978b..3bb245b0fc1112c3b51c558401ed54ac1592ba77 100755 (executable)
--- a/lttctl/ltt-armall.sh
+++ b/lttctl/ltt-armall.sh
@@ -20,26 +20,26 @@ MARKERSROOT=${DEBUGFSROOT}/ltt/markers
 DEFAULTMODULES="ltt-trace-control ltt-marker-control ltt-tracer ltt-relay ltt-kprobes ltt-userspace-event ltt-statedump ipc-trace kernel-trace mm-trace net-trace fs-trace jbd2-trace syscall-trace trap-trace block-trace rcu-trace"
 
 usage () {
-       echo "Usage: $0 [OPTION]..." > /dev/stderr
-       echo "Connect lttng markers" > /dev/stderr
-       echo "" > /dev/stderr
-       echo "Options:" > /dev/stderr
-       printf "\t-l           Also activate locking markers (high traffic)\n" > /dev/stderr
-       printf "\t-n           Also activate detailed network markers (large size)\n" > /dev/stderr
-       printf "\t-i           Also activate input subsystem events (security implication: records keyboard inputs)\n" > /dev/stderr
-       echo "" > /dev/stderr
-       printf "\t-q           Quiet mode, suppress output\n" > /dev/stderr
-       printf "\t-h           Print this help\n" > /dev/stderr
-       echo "" > /dev/stderr
+       echo "Usage: $0 [OPTION]..." 1>&2
+       echo "Connect lttng markers" 1>&2
+       echo "" 1>&2
+       echo "Options:" 1>&2
+       printf "\t-l           Also activate locking markers (high traffic)\n" 1>&2
+       printf "\t-n           Also activate detailed network markers (large size)\n" 1>&2
+       printf "\t-i           Also activate input subsystem events (security implication: records keyboard inputs)\n" 1>&2
+       echo "" 1>&2
+       printf "\t-q           Quiet mode, suppress output\n" 1>&2
+       printf "\t-h           Print this help\n" 1>&2
+       echo "" 1>&2
 }
 
 if [ "$(id -u)" != "0" ]; then
-       echo "Error: This script needs to be run as root." > /dev/stderr
+       echo "Error: This script needs to be run as root." 1>&2
        exit 1;
 fi
 
 if [ ! "${DEBUGFSROOT}" ]; then
-       echo "Error: debugfs not mounted" > /dev/stderr
+       echo "Error: debugfs not mounted" 1>&2
        exit 1;
 fi
 
@@ -49,7 +49,7 @@ if [ ! -d "${MARKERSROOT}" ]; then
                modprobe $i
        done
        if [ ! -d "${MARKERSROOT}" ]; then
-               echo "Error: LTT trace controller not found (did you compile and load LTTng?)" > /dev/stderr
+               echo "Error: LTT trace controller not found (did you compile and load LTTng?)" 1>&2
                exit 1;
        fi
 fi

diff --git a/lttctl/ltt-disarmall.sh b/lttctl/ltt-disarmall.sh
index d60a54eee50cd45546e269d8dd4b00f56b4743bd..e77be9ad92fdb72286a824b3debd0e5168ae2dcf 100755 (executable)
--- a/lttctl/ltt-disarmall.sh
+++ b/lttctl/ltt-disarmall.sh
@@ -21,27 +21,27 @@ DEFAULTMODULES="ltt-trace-control ltt-marker-control ltt-kprobes ltt-userspace-e
 EXTRAMODULES="lockdep-trace net-extended-trace"
 
 usage () {
-       echo "Usage: $0 [OPTION]..." > /dev/stderr
-       echo "Disconnect lttng markers" > /dev/stderr
-       echo "" > /dev/stderr
-       echo "Options:" > /dev/stderr
-       printf "\t-q           Quiet mode, suppress output\n" > /dev/stderr
-       printf "\t-h           Print this help\n" > /dev/stderr
-       echo "" > /dev/stderr
+       echo "Usage: $0 [OPTION]..." 1>&2
+       echo "Disconnect lttng markers" 1>&2
+       echo "" 1>&2
+       echo "Options:" 1>&2
+       printf "\t-q           Quiet mode, suppress output\n" 1>&2
+       printf "\t-h           Print this help\n" 1>&2
+       echo "" 1>&2
 }
 
 if [ "$(id -u)" != "0" ]; then
-       echo "Error: This script needs to be run as root." > /dev/stderr
+       echo "Error: This script needs to be run as root." 1>&2
        exit 1;
 fi
 
 if [ ! "${DEBUGFSROOT}" ]; then
-       echo "Error: debugfs not mounted" > /dev/stderr
+       echo "Error: debugfs not mounted" 1>&2
        exit 1;
 fi
 
 if [ ! -d "${MARKERSROOT}" ]; then
-       echo "Error: LTT trace controller not found (did you compile and load LTTng?)" > /dev/stderr
+       echo "Error: LTT trace controller not found (did you compile and load LTTng?)" 1>&2
        exit 1;
 fi