At 19:44 25/02/2003 -0500, Peter Howell wrote: >On Tue, 2003-02-25 at 01:14, pa3gcu wrote: >> > "rec" is not a stock linux command, and I cannot readily identify a package >> > that includes that application (just trying to match on "rec" turns up >> > several hundred hits in the Debian package database). So I'd suggest you >> > tell us a bit more about your setup, including enough information that we >> > can identify and take a look at the package that includes this command. >> >> rec is an unix command altho' not well supported, slackware 8 has it included. >> >> rec --help shows a lot but thses are relavant to the question; >> -c, --channels=CHANNELS specifies the number of sound channels in FILE >> -d, --device=DEVICE use DEVICE for input/output >> -f, --format=FORMAT specifies bit format of sample >> FORMAT is either s, u, U, A, a, or g >> -r, --rate=RATE sample rate in hertz of FILE >> -s, --size=SIZE interpret size of sample >> >> I think this one could be an help -s xxxxxxxb >> SIZE is either b, w, l, f, d, or D > > Alas no :-( > size isn't the file size. It's really the width of each sample. eg b >for 8 bits, w for 16 bits.... > >It appears that rec does not buffer the sound, but instead writes it >directly to the file. >It's inelegant, but I suppose I could kill the application after a >specified delay. There are two problems with implementing that for me. >Firstly, I don't think I could do that in perl, which I'm most familiar >with because there doesn't appear to be an easy way to spawn a process >and continue running the scipt. Secondly, I don't know how to run a >process and get it's process id, which I'd need to kill it. > > Ok, just did a little rtfm. I guess I could use ps and extract the id. >Now I guess I'd better learn some bash scripting >
There is a tcl based interpreter called expect which lets you spawn processes and gives you it's pid easily. If you have any programming or scripting experience then it will be easy. Or there is a program called timelimit which is part of the netpipes package that spawns a process and kills it if it doesn't return after a specified time. I don't know how accurate these are and i have no experience of timelimit. -- Carl - To unsubscribe from this list: send the line "unsubscribe linux-newbie" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.linux-learn.org/faqs
