[lttng-ust.git] / usttrace

#!/bin/bash

USTD="./ustd/ustd"
LIBINTERFORK="./libinterfork/.libs/libinterfork.so"

BASE_TRACE_DIR="$HOME/.usttraces"

function usage () {
	echo "usage:  $0 COMMAND" 2>/dev/stderr
}

function error() {
	echo "$0: error: $1" 2>/dev/stderr
}

# Prepare vars
CMD=$1

# Validate input
if [ -z "$HOME" ];
then
	error "no home specified"
fi

if [ -z "$CMD" ];
then
	error "no command specified"
	usage;
	exit 1
fi

# Create directory for trace output
DATESTRING="$(hostname)-$(date +%Y%m%d%H%M%S)"
OUTDIR="$BASE_TRACE_DIR/$DATESTRING"
mkdir -p "$OUTDIR"

# Choose socket path
SOCKPATH="/tmp/ust-sock-$$"

# Start daemon
$USTD -s "$SOCKPATH" -o "$OUTDIR" >"$OUTDIR/ustd.log" 2>&1 &
USTDPID=$!

# Establish the environment for the command
export UST_TRACE=1
export UST_AUTOPROBE=1
export UST_DAEMON_SOCKET="$SOCKPATH"

# Execute the command
bash -c "$CMD"

## Because of the keepalive mechanism, we're sure that by the time
## we get here, the daemon is connected to all the buffers that still exist.
## Therefore we can politely ask it to die when it's done.

kill -SIGTERM "$USTDPID"

# Tell the daemon to die
echo "Waiting for ustd to shutdown..."
wait "$USTDPID"
Commit	Line	Data
eb6adb25 PMF	1	#!/bin/bash
	2
	3	USTD="./ustd/ustd"
	4	LIBINTERFORK="./libinterfork/.libs/libinterfork.so"
	5
	6	BASE_TRACE_DIR="$HOME/.usttraces"
	7
	8	function usage () {
	9	echo "usage: $0 COMMAND" 2>/dev/stderr
	10	}
	11
	12	function error() {
	13	echo "$0: error: $1" 2>/dev/stderr
	14	}
	15
	16	# Prepare vars
	17	CMD=$1
	18
	19	# Validate input
	20	if [ -z "$HOME" ];
	21	then
	22	error "no home specified"
	23	fi
	24
	25	if [ -z "$CMD" ];
	26	then
	27	error "no command specified"
	28	usage;
	29	exit 1
	30	fi
	31
	32	# Create directory for trace output
	33	DATESTRING="$(hostname)-$(date +%Y%m%d%H%M%S)"
	34	OUTDIR="$BASE_TRACE_DIR/$DATESTRING"
	35	mkdir -p "$OUTDIR"
	36
	37	# Choose socket path
	38	SOCKPATH="/tmp/ust-sock-$$"
	39
	40	# Start daemon
	41	$USTD -s "$SOCKPATH" -o "$OUTDIR" >"$OUTDIR/ustd.log" 2>&1 &
	42	USTDPID=$!
	43
	44	# Establish the environment for the command
	45	export UST_TRACE=1
	46	export UST_AUTOPROBE=1
	47	export UST_DAEMON_SOCKET="$SOCKPATH"
	48
	49	# Execute the command
	50	bash -c "$CMD"
	51
	52	## Because of the keepalive mechanism, we're sure that by the time
	53	## we get here, the daemon is connected to all the buffers that still exist.
	54	## Therefore we can politely ask it to die when it's done.
	55
	56	kill -SIGTERM "$USTDPID"
	57
	58	# Tell the daemon to die
	59	echo "Waiting for ustd to shutdown..."
	60	wait "$USTDPID"