[ltt-dev] [UST PATCH] Fix up all use of /dev/stderr for portability to busybox /bin/sh

[Nils Carlson]

Merged, thanks!

/Nils

On Tue, 12 Apr 2011, Jason Wessel wrote:

> 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.
>
> In the usttrace script it did something that was effectively
> a NOP.  The result of echo "" 2>/dev/stderr is not actually
> going to send anything to stderr because the echo is going
> to write to stdout.  This case was also fixed.
>
> Signed-off-by: Jason Wessel <jason.wessel at windriver.com>
> ---
> tests/test_functions.sh         |    2 +-
> tests/trace_matches             |    4 ++--
> tests/valgrind_ust-consumerd.sh |    2 +-
> usttrace                        |   26 +++++++++++++-------------
> 4 files changed, 17 insertions(+), 17 deletions(-)
>
> diff --git a/tests/test_functions.sh b/tests/test_functions.sh
> index 79ade73..c4e913b 100644
> --- a/tests/test_functions.sh
> +++ b/tests/test_functions.sh
> @@ -77,7 +77,7 @@ function trace_matches() {
> 	LTTV_TRACE_PREFIX=""
>
>     else
> -	echo "$0: No lttv found. Edit \$RUNLTTV to point to your lttv source directory or \$LTTV to you lttv executable." >/dev/stderr
> +	echo "$0: No lttv found. Edit \$RUNLTTV to point to your lttv source directory or \$LTTV to you lttv executable." 1>&2
> 	exit 1;
>
>     fi
> diff --git a/tests/trace_matches b/tests/trace_matches
> index 17a65f8..da3d954 100755
> --- a/tests/trace_matches
> +++ b/tests/trace_matches
> @@ -1,7 +1,7 @@
> #!/bin/bash
>
> function error() {
> -	echo "$0: $@" >/dev/stderr
> +	echo "$0: $@" 1>&2
> }
>
> function usage() {
> @@ -43,7 +43,7 @@ elif [ -x "$(dirname `readlink -f $0`)/../../lttv/runlttv" ]; then
> 	LTTV_TRACE_PREFIX=""
>
> else
> -	echo "$0: No lttv found. Edit \$RUNLTTV to point to your lttv source directory or \$LTTV to you lttv executable." >/dev/stderr
> +	echo "$0: No lttv found. Edit \$RUNLTTV to point to your lttv source directory or \$LTTV to you lttv executable." 1>&2
> 	exit 1;
>
> fi
> diff --git a/tests/valgrind_ust-consumerd.sh b/tests/valgrind_ust-consumerd.sh
> index 856808b..7dd6668 100755
> --- a/tests/valgrind_ust-consumerd.sh
> +++ b/tests/valgrind_ust-consumerd.sh
> @@ -25,7 +25,7 @@ source $TESTDIR/tap.sh
> starttest "ust-consumerd valgrind check"
>
> if ! which valgrind > /dev/null; then
> -    echo "$0: Valgrind not found on the system." >/dev/stderr
> +    echo "$0: Valgrind not found on the system." 1>&2
>     exit 1;
> fi
>
> diff --git a/usttrace b/usttrace
> index af80faf..e76dae7 100755
> --- a/usttrace
> +++ b/usttrace
> @@ -4,7 +4,7 @@
> # Distributed under the GPLv2.
>
> error() {
> -	echo "$0: error: $1" 2>/dev/stderr
> +	echo "$0: error: $1" 1>&2
> }
>
> sighandler() {
> @@ -45,18 +45,18 @@ fi
> BASE_TRACE_DIR="${HOME}/.usttraces"
>
> usage() {
> -	echo "usage:  $0 OPTIONS COMMAND" 2>/dev/stderr
> -	echo "" 2>/dev/stderr
> -	echo "Options:" 2>/dev/stderr
> -	echo "    -l    Runtime link with UST library." 2>/dev/stderr
> -	echo "          (Needed only if program was not linked at compile time with libust.)" 2>/dev/stderr
> -	echo "    -L    Add path to ust libraries to LD_LIBRARY_PATH." 2>/dev/stderr
> -	echo "    -m    Instrument malloc calls." 2>/dev/stderr
> -	echo "    -f    Also trace forked processes." 2>/dev/stderr
> -	echo "    -s    Use system-wide daemon instead of creating one for this session." 2>/dev/stderr
> -	echo "    -S    Specify the subbuffer size." 2>/dev/stderr
> -	echo "    -N    Specify the number of subbuffers." 2>/dev/stderr
> -	echo "    -o    Output directory of the trace." 2>/dev/stderr
> +	echo "usage:  $0 OPTIONS COMMAND" 1>&2
> +	echo "" 1>&2
> +	echo "Options:" 1>&2
> +	echo "    -l    Runtime link with UST library." 1>&2
> +	echo "          (Needed only if program was not linked at compile time with libust.)" 1>&2
> +	echo "    -L    Add path to ust libraries to LD_LIBRARY_PATH." 1>&2
> +	echo "    -m    Instrument malloc calls." 1>&2
> +	echo "    -f    Also trace forked processes." 1>&2
> +	echo "    -s    Use system-wide daemon instead of creating one for this session." 1>&2
> +	echo "    -S    Specify the subbuffer size." 1>&2
> +	echo "    -N    Specify the number of subbuffers." 1>&2
> +	echo "    -o    Output directory of the trace." 1>&2
> }
>
> while getopts ":hlLmfsWS:N:o:" options; do
> -- 
> 1.7.1
>
>
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