hello,
i am trying to write a daemon that listen in the background and catches commands from the command line. For example:
I want my program to run before vim runs. This is possible?

The reason why I want to do this is because I'm writing a distributed program, where all the clients that run my daemon, can currently access a remote file system. So if vim is called I need to tell all the other clients that this file locked, or if the file is currently locked I want vim to open this as readonly.

let me know if this doesn't make sense,

thanks,
djgerbaor3

I cant see how you could do that, aside of reading the bytestream for each tty which is a pain in the ass.

I think you need to look more into the design of your application.

Regards
-Rob

You're going to need to do something lower-level than capturing the command line, because other programs can also open files. Sounds like you're going to need a listener at the filesystem level, but this is from someone with little filesystem experience. But if it's a remote filesystem, shouldn't it already have built-in mutex capabilities?

that is what i figure, thanks for the help, I think I'm just going design my own interface to the remote filesystem. For example, my daemon will have its own shell (or set of commands), and my users can type command to my program.

I have a dumb question: how can i redirect stderr to a log file. I want to do it in the program, not using shell scripts (i,.e. ./myprog >& out.dat)


thanks,

djgerbavor3

Hi -

To redirect stderr:

myprog 2> myfile.err

To redirect stdout and stderr to the same file:

myprog 1>&2 myfile.out

Here are more more details:

http://www.faqs.org/docs/abs/HTML/ioredirintro.html

'Hope that helps .. PSM

PS:
In case you were wondering, "myprog 1>&2 myfile.out" should be equivalent to "myprog 2>&1 myfile.out".