Fix proc and pid completion on OS X, and improve it on Linux.

https://github.com/fish-shell/fish-shell/pull/129

share/functions/__fish_complete_pids.fish

@@ -1,8 +1,15 @@
 function __fish_complete_pids -d "Print a list of process identifiers along with brief descriptions"
 	# This may be a bit slower, but it's nice - having the tty displayed is really handy
-	ps --no-heading -o pid,comm,tty --ppid %self -N | sed -r 's/ *([0-9]+) +([^ ].*[^ ]|[^ ]) +([^ ]+)$/\1'\t'\2 [\3]/' ^/dev/null
-
-	# If the above is too slow, this is faster but a little less useful
-	#	pgrep -l -v -P %self | sed 's/ /'\t'/'
+	# 'tail -n +2' deletes the first line, which contains the headers
+	# 'grep -v...' removes self from the output
+	set -l SELF %self
+	
+	# Display the tty if available
+	set -l sed_cmds 's/ *([0-9]+) +([^ ].*[^ ]|[^ ]) +([^ ]+) *$/\1'\t'\2 [\3]/'
+	
+	# But not if it's just question marks, meaning no tty
+	set -l sed_cmds $sed_cmds 's/ *\[\?*\] *$//'
+	
+	ps axc -o pid,ucomm,tty | grep -v '^\s*'$SELF'\s' | tail -n +2 | sed -E "-e "$sed_cmds  ^/dev/null
 end
 

share/functions/__fish_complete_proc.fish

@@ -1,4 +1,47 @@
 function __fish_complete_proc --description 'Complete by list of running processes'
-	ps -A --no-headers --format comm | sort -u
-
+	# Our function runs ps, followed by a massive list of commands passed to sed
+	set -l ps_cmd
+	set -l sed_cmds
+	if test (uname) = Linux
+		# comm and ucomm return a truncated name, so parse it from the command line field,
+		# which means we have to trim off the arguments.
+		# Unfortunately, it doesn't seem to escape spaces - so we can't distinguish
+		# between the command name, and the first argument. Still, processes with spaces
+		# in the name seem more common on OS X than on Linux, so prefer to parse out the
+		# command line rather than using the stat data.
+		# If the command line is unavailable, you get the stat data in brackets - so
+		# parse out brackets too.
+		set ps_cmd 'ps -A -o command'
+		
+		# Erase everything after the first space
+		set sed_cmds $sed_cmds 's/ .*//'
+		
+		# Erases weird stuff Linux gives like kworker/0:0
+		set sed_cmds $sed_cmds 's|/[0-9]:[0-9]]$||g'
+		
+		# Retain the last path component only
+		set sed_cmds $sed_cmds 's|.*/||g'
+		
+		# Strip off square brackets. Cute, huh?
+		set sed_cmds $sed_cmds 's/[][]//g'
+		
+		# Erase things that are just numbers
+		set sed_cmds $sed_cmds 's/^[0-9]*$//'
+	else
+		# OS X, BSD. Preserve leading spaces.
+		set ps_cmd 'ps axc -o comm'
+		
+		# Delete parenthesized (zombie) processes
+		set sed_cmds $sed_cmds '/(.*)/d'	
+	end
+	
+	# Append sed command to delete first line (the header)
+	set sed_cmds $sed_cmds '1d'
+	
+	# Append sed commands to delete leading dashes and trailing spaces
+	# In principle, commands may have trailing spaces, but ps emits space padding on OS X
+	set sed_cmds $sed_cmds 's/^-//' 's/ *$//'
+	
+	# Run ps, pipe it through our massive set of sed commands, then sort and unique
+	eval $ps_cmd | sed '-e '$sed_cmds | sort -u
 end