Re: inetd question related to cvs (not usual pserver doesn't work FAQ)
Laird Nelson writes: inetd programs are supposed to be able to simply read from STDIN, right? I'm trying to write a wrapper program around cvs pserver that gets invoked, obviously, from STDIN. I'd like to peek at the conversation between client and server, and I thought I could get at this conversation by simply reading from STDIN. But my program blocks infinitely. Is the cvs client/server protocol such that it is started by the server (the Cederqvist says no)? I'm not entirely clear on what it is you're doing, but a program started by inetd has the client socket as its STDIN and STDOUT. If you're trying to snoop on the traffic between the client and server, you'll need to create another socket to use to communicate with the cvs pserver and then you have to copy everything you read from STDIN to the pserver and everything you read from the pserver to STDOUT. This needs to happen more-or-less simultaneously to avoid getting stuck in a deadly embrace (e.g., you block trying to write to pserver which is blocked trying to write to you). Note that the simplest way to snoop on the traffic between the client and server if you're just curious is to set the CVS_CLIENT_LOG environment variable on the client side. -Larry Jones He piqued my curiosity. -- Calvin
RE: inetd question related to cvs (not usual pserver doesn't work FAQ)
An easier way to look at the pserver client/server dialog is to define the CVS_CLIENT_LOG environment variable with the base file name for the log on the client. The client will create two files. Everything that the client sends to the server is logged in filename.in and everything from the server is in filename.out. This is documented in Cederqvist (http://www.cvshome.org/docs/manual/index.html), specifically in http://www.cvshome.org/docs/manual/cvs_19.html#SEC178 - Tim -Original Message- From: Laird Nelson [mailto:[EMAIL PROTECTED]] Sent: Thursday, September 14, 2000 10:51 AM To: [EMAIL PROTECTED] Subject: inetd question related to cvs (not usual pserver doesn't work FAQ) inetd programs are supposed to be able to simply read from STDIN, right? I'm trying to write a wrapper program around cvs pserver that gets invoked, obviously, from STDIN. I'd like to peek at the conversation between client and server, and I thought I could get at this conversation by simply reading from STDIN. But my program blocks infinitely. Is the cvs client/server protocol such that it is started by the server (the Cederqvist says no)? In case it matters, my program is a perl program. Cheers, Laird
