diff --git a/README.md b/README.md
index d9764df..3473c17 100644
--- a/README.md
+++ b/README.md
@@ -1,13 +1,13 @@
 # bblib
 
-The _"Better BASH Library"_: A set of functions to assist with creating well-written and reliable BASH scripts. The functions are documented in-line within `bblib.bash`, and a simple example that uses it is in `example.bash`.
+The _"Better Bash Library"_: A set of functions to assist with creating well-written and reliable Bash scripts. The functions are documented in-line within `bblib.bash`, and a simple example that uses it is in `example.bash`.
 
 ## Usage
 
-Add this to the top of your BASH script:
+Add this to the top of your Bash script:
 
 ```bash
-source <(wget -qO- https://raw.githubusercontent.com/MrDrMcCoy/bblib/1.1.7/bblib.bash)
+source <(wget -qO- https://raw.githubusercontent.com/MrDrMcCoy/bblib/1.1.8/bblib.bash)
 ```
 
 Alternately, clone this repo locally and use `source` with the full path to `bblib.bash`.
@@ -91,15 +91,14 @@ Once `bblib.bash` is sourced in your script, you may refer to any of its supplie
   - Description: Checks to see if the user running the script matches the desired username and exits on failure.
   - Usage: `requireuser [user]`
 - `bash4check`
-  - Description: Checks to see if you are on BASH 4.0 or above and exits if not.
-  - Usage: Place `bash4check` at the beginning of any function that uses BASH 4+ features.
+  - Description: Checks to see if you are on Bash 4.0 or above and exits if not.
+  - Usage: Place `bash4check` at the beginning of any function that uses Bash 4+ features.
 - `finally`
   - Description: A function that runs extra commands before the script exits
   - Usage: Add actions to its list by running: `FINALCMDS+=("command arg arg")`
 - `checkpid`
-  - Description: Checks to see if another copy of this script is running by maintaining a PID file
+  - Description: Checks to see if another copy of this script is running by checking `ps` and maintaining a PID file.
   - Usage: `checkpid`
-  - Notes: This function only works properly in Linux, as it depends on PROCFS.
 - `prunner`
   - Description: Executes commands in parallel.
   - Usage:
@@ -130,7 +129,7 @@ Once `bblib.bash` is sourced in your script, you may refer to any of its supplie
 - `LOGFILE`
   - Description: Set this to have `log` additionally output to a file.
   - Used by: `log`.
-  - Notes: This will capture debug output if BASH has `set -x`.
+  - Notes: This will capture debug output if Bash has `set -x`.
   - Default: _unset_
 - `PIDFILE`
   - Description: The path to a file for tracking the PID of the script.
@@ -161,8 +160,14 @@ The commands that `bblib.bash` calls out to are listed here, in case you are on
   - Used by: `usage`
 - `fold`
   - Used by: `pprint`
+- `grep`
+  - Used by: `checkpid`
 - `logger`
   - Used by: `log`
+- `ps`
+  - Used by: `checkpid`
+- `rm`
+  - Used by: `checkpid`
 - `tee`
   - Used by: `log`
 - `tr`
@@ -174,8 +179,8 @@ The commands that `bblib.bash` calls out to are listed here, in case you are on
 
 If you would like to extend this library, some resources for advanced usage are available here:
 
-- The BASH Beginners Guide, which is not just for beginners: <https://www.tldp.org/LDP/Bash-Beginners-Guide/html/>
-- The Advanced BASH guide: <http://tldp.org/LDP/abs/html/>
-- The BASH Hackers Wiki has great advanced usage description and examples for BASH: <http://wiki.bash-hackers.org/>
-- BASH Style Guide: <https://google.github.io/styleguide/shell.xml>
+- The Bash Beginners Guide, which is not just for beginners: <https://www.tldp.org/LDP/Bash-Beginners-Guide/html/>
+- The Advanced Bash guide: <http://tldp.org/LDP/abs/html/>
+- The Bash Hackers Wiki has great advanced usage description and examples for Bash: <http://wiki.bash-hackers.org/>
+- Bash Style Guide: <https://google.github.io/styleguide/shell.xml>
 - A very good `getopts` tutorial: <https://sookocheff.com/post/bash/parsing-bash-script-arguments-with-shopts/>
diff --git a/bblib.bash b/bblib.bash
index 3101e42..9195660 100755
--- a/bblib.bash
+++ b/bblib.bash
@@ -78,9 +78,10 @@ uc () {
 hr () {
   # Print horizontal rule
   # Usage: hr [character]
-  local CHARACTER="${1:0:1}"
+  local CHARACTER="${1:--}"
+  local CHARACTER="${CHARACTER:0:1}"
   local -i COLUMNS=${COLUMNS:-$(tput cols)}
-  printf '%*s\n' "${COLUMNS:-80}" '' | tr ' ' "${CHARACTER:--}"
+  printf '%*s\n' "${COLUMNS:-80}" '' | tr ' ' "${CHARACTER}"
 }
 
 log () {
@@ -119,7 +120,7 @@ log () {
   # Send message to logger
   if [ "${NUMERIC_SEVERITY}" -le "${NUMERIC_LOGLEVEL}" ] ; then
     tr '\n' ' ' <<< "${LOGMSG}" | logger -s -p "user.${NUMERIC_SEVERITY}" -t "${LOGTAG} " |& \
-      if [ -n "${LOGFILE:-}" ] ; then
+      if [ -n "${LOGFILE:-}" ] && [ ! -t 0 ] ; then
         tee -a "${LOGFILE}" | pprint ${LOGCOLORS[$NUMERIC_SEVERITY]}
       elif [ ! -t 0 ]; then
         pprint ${LOGCOLORS[$NUMERIC_SEVERITY]} < /dev/stdin
@@ -150,7 +151,7 @@ bash4check () {
   if [ "${BASH_VERSINFO[0]}" -lt 4 ] ; then
     quit "ALERT" "Sorry, you need at least bash version 4 to run this function: ${FUNCNAME[1]}"
   else
-    log "DEBUG" "This script is safe to enable BASH version 4 features"
+    log "DEBUG" "This script is safe to enable Bash version 4 features"
   fi
 }
 
@@ -167,18 +168,12 @@ checkpid () {
   # Check for and maintain pidfile
   # Usage: checkpid
   local PIDFILE="${PIDFILE:-${0}.pid}"
-  if [[ ! -d "/proc/$$" ]]; then
-    quit "ERROR" "This function requires procfs. Are you on Linux?"
-  elif [[ ! -f "${PIDFILE}" ]] ; then
-    echo -n "$$" > "${PIDFILE}"
+  if [[ $( ps ao args | grep -wc "$(basename "$0")" ) -gt 3 ]] ; then
+    quit "ERROR" "Script '$(basename "$0")' is already running, exiting."
+  else
+    echo "$$" > "${PIDFILE}"
     FINALCMDS+=("rm -v ${PIDFILE}")
     log "DEBUG" "PID $$ has no conflicts and has been written to ${PIDFILE}"
-  elif [[ "$( cat "${PIDFILE}" || true )" -ne $$ ]] ; then
-    quit "ERROR" "This script is already running, exiting."
-  elif [[ "$( cat "${PIDFILE}" || true )" -eq $$ ]] ; then
-    log "DEBUG" "PID $$ matches the contents of ${PIDFILE}, proceeding."
-  else
-    quit "ALERT" "Unknown error verifying unique PID."
   fi
 }
 
@@ -261,7 +256,7 @@ prunner () {
   local -i INDEX=0
   until [ ${#PQUEUE[@]} == 0 ] ; do
     if [ "$(jobs -rp | wc -l)" -lt "${THREADS:-8}" ] ; then
-      ${PCMD} ${PQUEUE[$INDEX]} 2> >(log "ERROR") | log "DEBUG" &
+      ${PCMD} ${PQUEUE[$INDEX]}
       unset "PQUEUE[$INDEX]"
       ((INDEX++)) || true
     fi
@@ -273,7 +268,7 @@ prunner () {
 trap finally EXIT
 
 # Trap for killing runaway processes and exiting
-trap "quit 'ALERT' 'Exiting on signal' '3'" SIGINT SIGTERM
+trap "quit 'ALERT' 'Exiting on signal' '3'" INT TERM QUIT HUP
 
 # Trap to capture errors
 trap 'quit "ALERT" "Command failed with exit code $?: $BASH_COMMAND" "$?"' ERR
diff --git a/tests/test.bash b/tests/test.bash
index ebd9971..190d62d 100644
--- a/tests/test.bash
+++ b/tests/test.bash
@@ -8,6 +8,12 @@ main () {
 
   log "INFO" "Starting tests"
 
+  # Pid check
+  log "INFO" "Test checkpid"
+  checkpid || true
+  log "INFO" "Test checkpid in second shell"
+  bash "$0" || true & wait
+
   # Test argparser
   log "INFO" "Test argparser with no options"
   bash -c 'source ../bblib.bash ; source test.bash.conf ; argparser' || true
@@ -23,14 +29,28 @@ main () {
   bash -c 'source ../bblib.bash ; source test.bash.conf ; argparser -y' || true
 
   # Test hr
-  log "INFO" "Test hr ="
-  hr =
+  log "INFO" "Test hr"
+  hr
+  hr = | pprint yellow
 
-  # Test lc, uc, and pprint
+  # Test lc, uc, pprint line wrapping
   log "INFO" "Test lc"
-  lc < lorem-ipsum.txt | pprint > lorem-ipsum-lc-pprint.out |& log "DEBUG"
+  head -n1 lorem-ipsum.txt | lc | pprint
   log "INFO" "Test uc"
-  uc < lorem-ipsum.txt | pprint > lorem-ipsum-uc-pprint.out |& log "DEBUG"
+  tail -n1 lorem-ipsum.txt | uc | pprint
+
+  # Test pprint colors
+  log "INFO" "Test pprint"
+  pprint 0 <<< black
+  pprint 1 <<< red
+  pprint 2 <<< green
+  pprint 3 <<< yellow
+  pprint 4 <<< blue
+  pprint 5 <<< magenta
+  pprint 6 <<< cyan
+  pprint 7 <<< white
+  pprint 8 <<< bold
+  pprint 9 <<< underline
 
   # Test shorthand log log loggers
   log_debug "shorthand log_debug test"
@@ -46,12 +66,6 @@ main () {
   log "INFO" "Test bash4check"
   bash4check
 
-  # Pid check
-  log "INFO" "Test checkpid"
-  checkpid || true
-  log "INFO" "Test checkpid in second shell"
-  bash -c 'source ../bblib.bash ; source test.bash.conf ; checkpid' || true
-
   # User check
   log "INFO" "Test requireuser with \$REQUIREUSER"
   bash -c 'source ../bblib.bash ; source test.bash.conf ; requireuser' || true
@@ -71,9 +85,9 @@ main () {
 
   # Parallel test
   log "INFO" "Test prunner gzipping the .out files with arguments for the jobs"
-  prunner -c "gzip -fk" *.out
-  log "INFO" "Test prunner echoing the .out files with stdin for the jobs"
-  find . -maxdepth 1 -type f -name "*.out" | head -n5 | prunner -c "echo found file " -t 6
+  prunner -c "gzip -f" *.out
+  log "INFO" "Test prunner echoing the .gz files with stdin for the jobs"
+  find . -maxdepth 1 -type f -name "*.gz" | head -n5 | prunner -c "echo found file " -t 6
 
   # Add cleanup tasks
   FINALCMDS+=('rm -v *.out')