Bug 19375

Summary:	[FR] crontab locking/timestamping/whatever to avoid double edits
Product:	Sisyphus	Reporter:	Michael Shigorin <mike>
Component:	vixie-cron	Assignee:	placeholder <placeholder>
Status:	NEW ---	QA Contact:	qa-sisyphus
Severity:	enhancement
Priority:	P2	CC:	glebfm, ldv, placeholder, vt
Version:	unstable
Hardware:	all
OS:	Linux

Description Michael Shigorin 2009-03-27 20:38:55 MSK

Would be quite nice if crontab -e did something to avoid concurrent sessions with the last one silently overwriting any previous changes.

Issuing a warning if a file has been changed since reading it in (by comparing temporary and spooled file timestamps) should be good enough:
* check out spooled file for editing while saving its timestamp
* edit
* check saved timestamp against current spooled file's one
  * issue a warning if it's older already, or
  * check edited file into spool

PS: yes I just [almost] did fall to this one. :)