Cleanup: fix problems reported by shell lint

Followup to #15616, which is not usable as it is (way, way, way
too much noise) but actually found a few real nits that should
be fixed.

Signed-off-by: Ed Santiago <santiago@redhat.com>

hack/bats

@@ -106,7 +106,7 @@ export PODMAN_ROOTLESS_USER=$(id -un)
 
 # Root
 if [ -z "$ROOTLESS_ONLY" ]; then
-    echo "# bats ${bats_filter[@]} $TESTS"
+    echo "# bats ${bats_filter[*]} $TESTS"
     sudo    --preserve-env=PODMAN \
             --preserve-env=PODMAN_TEST_DEBUG \
             --preserve-env=OCI_RUNTIME \
@@ -119,7 +119,7 @@ fi
 # Rootless. (Only if we're not already root)
 if [[ -z "$ROOT_ONLY" && "$(id -u)" != 0 ]]; then
     echo "--------------------------------------------------"
-    echo "\$ bats ${bats_filter[@]} $TESTS"
+    echo "\$ bats ${bats_filter[*]} $TESTS"
     bats "${bats_opts[@]}" "${bats_filter[@]}" $TESTS
     rc=$((rc | $?))
 fi

hack/check_root.sh

@@ -1,5 +1,5 @@
 #!/usr/bin/env bash
 if ! [ $(id -u) = 0 ]; then
-   echo "Please run as root! '$@' requires root privileges."
+   echo "Please run as root! '$*' requires root privileges."
    exit 1
 fi

hack/man-page-checker

@@ -87,7 +87,7 @@ function compare_usage() {
 
     # strip off command name from both
     from_man=$(sed -e "s/\*\*$cmd\*\*[[:space:]]*//" <<<"$from_man")
-    from_help=$(sed -e "s/^[[:space:]]*$cmd[[:space:]]*//" <<<"$from_help")
+    from_help=$(sed -e "s/^[[:space:]]*${cmd}[[:space:]]*//" <<<"$from_help")
 
     # man page lists 'foo [*options*]', help msg shows 'foo [flags]'.
     # Make sure if one has it, the other does too.
@@ -153,7 +153,7 @@ for md in *.1.md;do
         # special case: the command is "auto-update", with a hyphen
         md_nodash='podman auto-update'
     fi
-    if [ "$cmd" != "$md_nodash" -a "$cmd" != "podman-remote" ]; then
+    if [[ "$cmd" != "$md_nodash" ]] && [[ "$cmd" != "podman-remote" ]]; then
         echo
         printf "Inconsistent program name in SYNOPSIS in %s:\n" $md
         printf "  SYNOPSIS = %s (expected: '%s')\n" "$cmd" "$md_nodash"

test/apiv2/test-apiv2

@@ -272,8 +272,8 @@ function t() {
             esac
         done
         if [[ -z "$curl_args" ]]; then
-            curl_args=(-d $(jsonify ${post_args[@]}))
-            testname="$testname [${curl_args[@]}]"
+            curl_args=(-d $(jsonify ${post_args[*]}))
+            testname="$testname [${curl_args[*]}]"
         fi
     fi
 
@@ -336,7 +336,7 @@ function t() {
 
     # Any error from curl is instant bad news, from which we can't recover
     if [[ $rc -ne 0 ]]; then
-        die "curl failure ($rc) on $url - cannot continue"
+        die "curl failure ($rc) on $url - cannot continue. args=${curl_args[*]}"
     fi
 
     # Show returned headers (without trailing ^M or empty lines) in log file.
@@ -384,7 +384,7 @@ function t() {
 
     # Special case: if response code does not match, dump the response body
     # and skip all further subtests.
-    if [[ $actual_code != $expected_code ]]; then
+    if [[ "$actual_code" != "$expected_code" ]]; then
         echo -e "#  response: $output"
         for i; do
             _show_ok skip "$testname: $i # skip - wrong return code"
@@ -671,11 +671,11 @@ echo -e "collected ${#tests_to_run[@]} items\n"
 
 start_service
 
-for i in ${tests_to_run[@]}; do
+for i in "${tests_to_run[@]}"; do
     TEST_CONTEXT="[$(basename $i .at)]"
 
     # Clear output from 'podman' helper
-    >| $WORKDIR/output.log
+    truncate --size=0 $WORKDIR/output.log
 
     source $i
 done

test/buildah-bud/make-new-buildah-diffs

@@ -17,7 +17,7 @@ if [[ ! $whereami =~ test-buildah-v ]]; then
 fi
 
 # FIXME: check that git repo is buildah
-git remote -v | grep -q [BUILDAHREPO] \
+git remote -v | grep -q '[BUILDAHREPO]' \
     || die "This does not look like a buildah repo (git remote -v)"
 
 # We could do the commit automatically, but it's prudent to require human

test/compose/test-compose

@@ -64,7 +64,7 @@ function is() {
     local expect=$2
     local testname=$3
 
-    if [[ $actual = $expect ]]; then
+    if [[ "$actual" = "$expect" ]]; then
         # On success, include expected value; this helps readers understand
         _show_ok 1 "$testname=$expect"
         return
@@ -303,12 +303,12 @@ n_tests=0
 # We aren't really TAP 13; this helps logformatter recognize our output as BATS
 echo "TAP version 13"
 
-for t in ${tests_to_run[@]}; do
+for t in "${tests_to_run[@]}"; do
     testdir="$(dirname $t)"
     testname="$(basename $testdir)"
 
     if [ -e $test_dir/SKIP ]; then
-        local reason="$(<$test_dir/SKIP)"
+        reason="$(<$test_dir/SKIP)"
         if [ -n "$reason" ]; then
             reason=" - $reason"
         fi

test/system/015-help.bats

@@ -121,7 +121,7 @@ function check_help() {
             # Exceptions: these commands don't work rootless
             if is_rootless; then
                 # "pause is not supported for rootless containers"
-                if [ "$cmd" = "pause" -o "$cmd" = "unpause" ]; then
+                if [[ "$cmd" = "pause" ]] || [[ "$cmd" = "unpause" ]]; then
                     continue
                 fi
                 # "network rm" too
@@ -162,17 +162,17 @@ function check_help() {
 
     # Any command that takes subcommands, prints its help and errors if called
     # without one.
-    dprint "podman $@"
+    dprint "podman $*"
     run_podman '?' "$@"
     is "$status" 125 "'podman $*' without any subcommand - exit status"
-    is "$output" ".*Usage:.*Error: missing command '.*$@ COMMAND'" \
+    is "$output" ".*Usage:.*Error: missing command '.*$* COMMAND'" \
        "'podman $*' without any subcommand - expected error message"
 
     # Assume that 'NoSuchCommand' is not a command
-    dprint "podman $@ NoSuchCommand"
+    dprint "podman $* NoSuchCommand"
     run_podman '?' "$@" NoSuchCommand
     is "$status" 125 "'podman $* NoSuchCommand' - exit status"
-    is "$output" "Error: unrecognized command .*$@ NoSuchCommand" \
+    is "$output" "Error: unrecognized command .*$* NoSuchCommand" \
        "'podman $* NoSuchCommand' - expected error message"
 
     # This can happen if the output of --help changes, such as between

test/system/065-cp.bats

@@ -436,7 +436,7 @@ load helpers
         run_podman cp cpcontainer:$src $destdir$dest
         is "$(< $destdir$dest_fullname/containerfile0)" "${randomcontent[0]}" "$description"
         is "$(< $destdir$dest_fullname/containerfile1)" "${randomcontent[1]}" "$description"
-        rm -rf $destdir/*
+        rm -rf ${destdir:?}/*
     done < <(parse_table "$tests")
     run_podman kill cpcontainer
     run_podman rm -t 0 -f cpcontainer
@@ -456,7 +456,7 @@ load helpers
         run_podman cp cpcontainer:$src $destdir$dest
         is "$(< $destdir$dest_fullname/containerfile0)" "${randomcontent[0]}" "$description"
         is "$(< $destdir$dest_fullname/containerfile1)" "${randomcontent[1]}" "$description"
-        rm -rf $destdir/*
+        rm -rf ${destdir:?}/*
     done < <(parse_table "$tests")
 
     touch $destdir/testfile

test/system/070-build.bats

@@ -541,7 +541,7 @@ Labels.$label_name | $label_value
          this-file-does-not-match-anything-in-ignore-file
          comment
     )
-    for f in ${files[@]}; do
+    for f in "${files[@]}"; do
         # The magic '##-' strips off the '-' prefix
         echo "$f" > $tmpdir/${f##-}
     done

test/system/160-volumes.bats

@@ -315,11 +315,11 @@ EOF
 
     # List available volumes for pruning after using 1,2,3
     run_podman volume prune <<< N
-    is "$(echo $(sort <<<${lines[@]:1:3}))" "${v[4]} ${v[5]} ${v[6]}" "volume prune, with 1,2,3 in use, lists 4,5,6"
+    is "$(echo $(sort <<<${lines[*]:1:3}))" "${v[4]} ${v[5]} ${v[6]}" "volume prune, with 1,2,3 in use, lists 4,5,6"
 
     # List available volumes for pruning after using 1,2,3 and filtering; see #8913
     run_podman volume prune --filter label=mylabel <<< N
-    is "$(echo $(sort <<<${lines[@]:1:2}))" "${v[5]} ${v[6]}" "volume prune, with 1,2,3 in use and 4 filtered out, lists 5,6"
+    is "$(echo $(sort <<<${lines[*]:1:2}))" "${v[5]} ${v[6]}" "volume prune, with 1,2,3 in use and 4 filtered out, lists 5,6"
 
     # prune should remove v4
     run_podman volume prune --force

test/system/400-unprivileged-access.bats

@@ -119,7 +119,7 @@ EOF
 
     # Some of the above may not exist on our host. Find only the ones that do.
     local -a subset=()
-    for mp in ${mps[@]}; do
+    for mp in "${mps[@]}"; do
         if [ -e $mp ]; then
             subset+=($mp)
         fi
@@ -128,7 +128,7 @@ EOF
     # Run 'stat' on all the files, plus /dev/null. Get path, file type,
     # number of links, major, and minor (see below for why). Do it all
     # in one go, to avoid multiple podman-runs
-    run_podman '?' run --rm $IMAGE stat -c'%n:%F:%h:%T:%t' /dev/null ${subset[@]}
+    run_podman '?' run --rm $IMAGE stat -c'%n:%F:%h:%T:%t' /dev/null "${subset[@]}"
     assert $status -le 1 "stat exit status: expected 0 or 1"
 
     local devnull=