usttrace

   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"