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Re: "vzctl stop" is taking too much time when called from a setuid binary [message #3359 is a reply to message #3352]

Wed, 24 May 2006 08:56

Vasily Tarasov
Messages: 1345
Registered: January 2006

Senior Member

When vzctl stops VPS it does something like that:
1) forks process. This child process enters VPS
2.1) Child process executes "halt" command inside VPS
2.2) parent process waits for VPS dead. <---------- HERE IS YOUR ~5 MINUTS
3) If VPS isn't stopped for some time parent process stops it more roughly: kills init inside VPS.

The question is why child process doesn't execute "halt"? Rolling Eyes

The reason is that vzctl uses getenv("PATH") standard function,
that returns environment variable PATH. It's nessecary to determine the location of halt command. Unfortunately getenv() returns variable from your user environment - not root environment. And there is no /sbin in PATH, where halt usually resides...

So you can add /sbin in PATH (or where is halt in your vps?).
I rewrote a little your programm - it works quckly now. It's in attachment.

HTH!

Attachment: vzstop.c
(Size: 0.97KB, Downloaded 350 times)

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[Message index]

		"vzctl stop" is taking too much time when called from a setuid binary By: scythe on Tue, 23 May 2006 22:09
		Re: "vzctl stop" is taking too much time when called from a setuid binary By: RapidVPS on Wed, 24 May 2006 00:59
		Re: "vzctl stop" is taking too much time when called from a setuid binary By: scythe on Wed, 24 May 2006 08:13
		Re: "vzctl stop" is taking too much time when called from a setuid binary By: Vasily Tarasov on Wed, 24 May 2006 08:56
		Re: "vzctl stop" is taking too much time when called from a setuid binary By: scythe on Wed, 24 May 2006 09:13

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