perf tests shell: Fixed shellcheck warnings

Fixed the shellcheck warnings in buildid.sh, record+probe_libc_inet_pton.sh
and record+script_probe_vfs_getname.sh perf shell scripts:

1. Prefer [ p ] && [ q ] as [ p -a q ] is not well defined.
2. Prefer [ p ] || [ q ] as [ p -o q ] is not well defined.
3. Used * argument to avoid the argument mixes string and array
4. Resolved issue for variable refernce, where the variable is
   being used before it has been initialized.
5. Resolved word splitting issue (syntax error).
6. The "err" variable has been removed from buildid.sh since
   it is not used anywhere in the code.
Signed-off-by: Samir Mulani <samir@linux.vnet.ibm.com>
Cc: Disha Goel <disgoel@linux.vnet.ibm.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Madhavan Srinivasan <maddy@linux.ibm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: linuxppc-dev@lists.ozlabs.org
Link: https://lore.kernel.org/r/20230613164145.50488-13-atrajeev@linux.vnet.ibm.comSigned-off-by: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Signed-off-by: Kajol Jain <kjain@linux.ibm.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/tests/shell/buildid.sh

@@ -83,12 +83,12 @@ check()
 	# in case of pe-file.exe file
 	echo $1 | grep ".exe"
 	if [ $? -eq 0 ]; then
-		if [ -x $1  -a ! -x $file ]; then
+		if [ -x $1 ] && [ ! -x $file ]; then
 			echo "failed: file ${file} executable does not exist"
 			exit 1
 		fi
 
-		if [ ! -x $file -a ! -e $file ]; then
+		if [ ! -x $file ] && [ ! -e $file ]; then
 			echo "failed: file ${file} does not exist"
 			exit 1
 		fi
@@ -136,10 +136,10 @@ test_record()
 	log_err=$(mktemp /tmp/perf.log.err.XXX)
 	perf="perf --buildid-dir ${build_id_dir}"
 
-	echo "running: perf record $@"
-	${perf} record --buildid-all -o ${data} $@ 1>${log_out} 2>${log_err}
+	echo "running: perf record $*"
+	${perf} record --buildid-all -o ${data} "$@" 1>${log_out} 2>${log_err}
 	if [ $? -ne 0 ]; then
-		echo "failed: record $@"
+		echo "failed: record $*"
 		echo "see log: ${log_err}"
 		exit 1
 	fi
@@ -172,4 +172,4 @@ if [ ${run_pe} -eq 1 ]; then
 	rm -r ${wineprefix}
 fi
 
-exit ${err}
+exit 0

tools/perf/tests/shell/record+probe_libc_inet_pton.sh

@@ -10,8 +10,8 @@
 # SPDX-License-Identifier: GPL-2.0
 # Arnaldo Carvalho de Melo <acme@kernel.org>, 2017
 
-. $(dirname $0)/lib/probe.sh
-. $(dirname $0)/lib/probe_vfs_getname.sh
+. "$(dirname "$0")/lib/probe.sh"
+. "$(dirname "$0")/lib/probe_vfs_getname.sh"
 
 libc=$(grep -w libc /proc/self/maps | head -1 | sed -r 's/.*[[:space:]](\/.*)/\1/g')
 nm -Dg $libc 2>/dev/null | fgrep -q inet_pton || exit 254
@@ -23,7 +23,7 @@ add_libc_inet_pton_event() {
 	event_name=$(perf probe -f -x $libc -a inet_pton 2>&1 | tail -n +2 | head -n -5 | \
 			grep -P -o "$event_pattern(?=[[:space:]]\(on inet_pton in $libc\))")
 
-	if [ $? -ne 0 -o -z "$event_name" ] ; then
+	if [ $? -ne 0 ] || [ -z "$event_name" ] ; then
 		printf "FAIL: could not add event\n"
 		return 1
 	fi

tools/perf/tests/shell/record+script_probe_vfs_getname.sh

@@ -9,11 +9,11 @@
 # SPDX-License-Identifier: GPL-2.0
 # Arnaldo Carvalho de Melo <acme@kernel.org>, 2017
 
-. $(dirname $0)/lib/probe.sh
+. "$(dirname "$0")/lib/probe.sh"
 
 skip_if_no_perf_probe || exit 2
 
-. $(dirname $0)/lib/probe_vfs_getname.sh
+. "$(dirname "$0")/lib/probe_vfs_getname.sh"
 
 record_open_file() {
 	echo "Recording open file:"