9 files changed, 20 insertions, 31 deletions
diff --git a/tests/posix/L_loops.sh b/tests/posix/L_loops.sh
index f737cea..1314401 100644
--- a/tests/posix/L_loops.sh
+++ b/tests/posix/L_loops.sh
@@ -1,4 +1,4 @@
 # POSIX says it's okay to either stop or keep going on seeing a filesystem
 # loop, as long as a diagnostic is printed
-errors=$(invoke_bfs -L loops 2>&1 >/dev/null)
+! errors=$(invoke_bfs -L loops 2>&1 >/dev/null)
 [ -n "$errors" ]
diff --git a/tests/posix/L_xdev.sh b/tests/posix/L_xdev.sh
index 2fc99dd..587c8bb 100644
--- a/tests/posix/L_xdev.sh
+++ b/tests/posix/L_xdev.sh
@@ -3,13 +3,12 @@ test "$UNAME" = "Darwin" && skip
 
 clean_scratch
 mkdir scratch/{foo,mnt}
+
 sudo mount -t tmpfs tmpfs scratch/mnt
+trap "sudo umount scratch/mnt" EXIT
+
 ln -s ../mnt scratch/foo/bar
 "$XTOUCH" scratch/mnt/baz
 ln -s ../mnt/baz scratch/foo/qux
 
 bfs_diff -L scratch -xdev
-ret=$?
-
-sudo umount scratch/mnt
-return $ret
diff --git a/tests/posix/depth_error.sh b/tests/posix/depth_error.sh
index f770210..15cc82d 100644
--- a/tests/posix/depth_error.sh
+++ b/tests/posix/depth_error.sh
@@ -1,11 +1,7 @@
 clean_scratch
 "$XTOUCH" -p scratch/foo/bar
-chmod a-r scratch/foo
-
-bfs_diff scratch -depth
-ret=$?
 
-chmod +r scratch/foo
-clean_scratch
+chmod a-r scratch/foo
+trap "chmod +r scratch/foo" EXIT
 
-[ $ret -eq $EX_BFS ]
+check_exit $EX_BFS bfs_diff scratch -depth
diff --git a/tests/posix/exec_nonexistent.sh b/tests/posix/exec_nonexistent.sh
index b4e08e0..d4ad92a 100644
--- a/tests/posix/exec_nonexistent.sh
+++ b/tests/posix/exec_nonexistent.sh
@@ -1,8 +1,7 @@
 # Failure to execute the command should lead to an error message and
 # non-zero exit status.  See https://unix.stackexchange.com/q/704522/56202
 
-stderr=$(invoke_bfs basic -exec "$TESTS/nonexistent" {} \; 2>&1 >/dev/null)
-[ -n "$stderr" ] || return 1
+! stderr=$(invoke_bfs basic -exec "$TESTS/nonexistent" {} \; 2>&1 >/dev/null)
+[ -n "$stderr" ]
 
-bfs_diff basic -print -exec "$TESTS/nonexistent" {} \; -print
-(($? == EX_BFS))
+check_exit $EX_BFS bfs_diff basic -print -exec "$TESTS/nonexistent" {} \; -print
diff --git a/tests/posix/exec_plus_nonexistent.sh b/tests/posix/exec_plus_nonexistent.sh
index f96099e..6c9cb8c 100644
--- a/tests/posix/exec_plus_nonexistent.sh
+++ b/tests/posix/exec_plus_nonexistent.sh
@@ -1,5 +1,4 @@
-stderr=$(invoke_bfs basic -exec "$TESTS/nonexistent" {} + 2>&1 >/dev/null)
-[ -n "$stderr" ] || return 1
+! stderr=$(invoke_bfs basic -exec "$TESTS/nonexistent" {} + 2>&1 >/dev/null)
+[ -n "$stderr" ]
 
-bfs_diff basic -exec "$TESTS/nonexistent" {} + -print
-(($? == EX_BFS))
+check_exit $EX_BFS bfs_diff basic -exec "$TESTS/nonexistent" {} + -print
diff --git a/tests/posix/exec_plus_status.sh b/tests/posix/exec_plus_status.sh
index ea9e5ef..f44062e 100644
--- a/tests/posix/exec_plus_status.sh
+++ b/tests/posix/exec_plus_status.sh
@@ -1,4 +1,3 @@
 # -exec ... {} + should always return true, but if the command fails, bfs
 # should exit with a non-zero status
-bfs_diff basic -exec false {} + -print
-(($? == EX_BFS))
+check_exit $EX_BFS bfs_diff basic -exec false {} + -print
diff --git a/tests/posix/readdir_error.sh b/tests/posix/readdir_error.sh
index e45ec5c..9a002a1 100644
--- a/tests/posix/readdir_error.sh
+++ b/tests/posix/readdir_error.sh
@@ -29,7 +29,7 @@ kill -9 "$pid"
 # Wait until it's really a zombie
 state=R
 while [ "$state" != "Z" ]; do
-    read -r _ _ state _ <"/proc/$pid/stat" || exit 1
+    read -r _ _ state _ <"/proc/$pid/stat"
 done
 
 # On Linux, open(/proc/$pid/net) will succeed but readdir() will fail
diff --git a/tests/posix/type_bind_mount.sh b/tests/posix/type_bind_mount.sh
index fe32875..2d913db 100644
--- a/tests/posix/type_bind_mount.sh
+++ b/tests/posix/type_bind_mount.sh
@@ -3,10 +3,8 @@ test "$UNAME" = "Linux" || skip
 
 clean_scratch
 "$XTOUCH" scratch/{file,null}
+
 sudo mount --bind /dev/null scratch/null
+trap "sudo umount scratch/null" EXIT
 
 bfs_diff scratch -type c
-ret=$?
-
-sudo umount scratch/null
-return $ret
diff --git a/tests/posix/xdev.sh b/tests/posix/xdev.sh
index 44e04dd..9d21b14 100644
--- a/tests/posix/xdev.sh
+++ b/tests/posix/xdev.sh
@@ -3,11 +3,10 @@ test "$UNAME" = "Darwin" && skip
 
 clean_scratch
 mkdir scratch/{foo,mnt}
+
 sudo mount -t tmpfs tmpfs scratch/mnt
+trap "sudo umount scratch/mnt" EXIT
+
 "$XTOUCH" scratch/foo/bar scratch/mnt/baz
 
 bfs_diff scratch -xdev
-ret=$?
-
-sudo umount scratch/mnt
-return $ret