+# Check pgrep from env, default to pgrep if none
+if [ -z "$PGREP" ]; then
+ PGREP=pgrep
+fi
+
+# Due to the renaming of threads we need to use the full command (pgrep -f) to
+# identify the pids for multiple lttng related processes. The problem with "pgrep
+# -f" is that it ends up also looking at the arguments. We use a two stage
+# lookup. The first one is using "pgrep -f" yielding potential candidate.
+# The second on perform grep on the basename of the first field of the
+# /proc/pid/cmdline of the previously identified pids. The first field
+# correspond to the actual command.
+function lttng_pgrep ()
+{
+ local pattern=$1
+ local possible_pids
+ local full_command_no_argument
+ local command_basename
+
+ possible_pids=$($PGREP -f "$pattern")
+ if [ -z "$possible_pids" ]; then
+ return 0
+ fi
+
+ while IFS= read -r pid ; do
+ # /proc/pid/cmdline is null separated.
+ if full_command_no_argument=$(cut -d '' -f 1 2>/dev/null < /proc/"$pid"/cmdline); then
+ command_basename=$(basename "$full_command_no_argument")
+ if grep -q "$pattern" <<< "$command_basename"; then
+ echo "$pid"
+ fi
+ fi
+ done <<< "$possible_pids"
+ return 0
+}
+