Date: Tue, 8 Feb 2005 10:28:24 -0800 From: "Loren M. Lang" <lorenl@alzatex.com> To: Dan Nelson <dnelson@allantgroup.com> Cc: FreeBSD Mailing list <freebsd-questions@freebsd.org> Subject: Re: ktrace as a replacement for strace Message-ID: <20050208182824.GG8619@alzatex.com> In-Reply-To: <20050208181111.GC82752@dan.emsphone.com> References: <20050208115928.GE8619@alzatex.com> <20050208162429.GA82752@dan.emsphone.com> <20050208180233.GF8619@alzatex.com> <20050208181111.GC82752@dan.emsphone.com>
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On Tue, Feb 08, 2005 at 12:11:11PM -0600, Dan Nelson wrote: > In the last episode (Feb 08), Loren M. Lang said: > > On Tue, Feb 08, 2005 at 10:24:29AM -0600, Dan Nelson wrote: > > > In the last episode (Feb 08), Loren M. Lang said: > > > > I'm looking for a replacement for the strace program I used to > > > > use on linux; freebsd has a port of strace, but it just hangs > > > > everytime I use it. It looks like the bsd version of strace > > > > would be ktrace/kdump. I was able to get these to print a trace > > > > of the program I ran, but it doesn't do all the nice substatuting > > > > that strace was able to do. Mainly, I just want the first > > > > argument of open to look like a string instead of a 32 bit > > > > pointer that I can't read. I'm trying to figure out what files > > > > this program is trying to read so I can edit it's configuration > > > > file. > > > > > > The string in the NAMI line immediately after an open() call is the > > > filename in kdump output. > > > > Oh, I never noticed this since I was using grep to filter out the > > open suyscalls. In strace everything is in one line. Is there > > anything then that will work like the -e option in strace so I can > > list just the syscalls I want to see? > > grep -A1 "CALL open" is about the best you can do Wow, I used to use the -A argument all the time years ago to grep. Then at some point I stopped finding a need for it and completely forgot about that. One problem with cui vs. gui, if you don't use a feature often enough, you'll forget it even exists unless you check the manpage constantly. At least with guis, the limited features they offer are always visible. > > -- > Dan Nelson > dnelson@allantgroup.com -- I sense much NT in you. NT leads to Bluescreen. Bluescreen leads to downtime. Downtime leads to suffering. NT is the path to the darkside. Powerful Unix is. Public Key: ftp://ftp.tallye.com/pub/lorenl_pubkey.asc Fingerprint: B3B9 D669 69C9 09EC 1BCD 835A FAF3 7A46 E4A3 280C
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