Remove dependency on `pgrep`; use `ps` to get process names

Fixes #43

CHANGELOG.md

@@ -1,6 +1,7 @@
 # Changelog
 
 ### master
+- remove dependency on `pgrep` command. Use `ps` for fetching process names.
 
 ### v1.2.1, 2014-09-02
 - tweak 'new_pane' creation strategy to fix #36

README.md

@@ -47,7 +47,7 @@ This plugin goes to great lengths to save and restore all the details from your
 - restoring vim sessions (optional). More details in
   [restoring vim sessions](#restoring-vim-sessions).
 
-Requirements / dependencies: `tmux 1.9` or higher, `pgrep`, `bash`.
+Requirements / dependencies: `tmux 1.9` or higher, `bash`.
 
 `tmux-resurrect` is idempotent! It will not try to restore panes or windows that
 already exist.

scripts/save.sh

@@ -66,8 +66,9 @@ dump_panes_raw() {
 }
 
 pane_full_command() {
-	pane_pid="$1"
-	\pgrep -lf -P "$pane_pid" |
+	local pane_pid="$1"
+	ps -eo "ppid command" |
+		grep "^${pane_pid}" |
 		cut -d' ' -f2-
 }