Date: Tue, 20 May 2003 10:04:05 +0200 (CEST) From: Bogdan TARU <bgd@icomag.de> To: Dag-Erling Smorgrav <des@ofug.org> Cc: Dan Nelson <dnelson@allantgroup.com> Subject: Re: linux binary blues Message-ID: <20030520094427.K78063-100000@fw.office.icom> In-Reply-To: <xzpaddoa8a2.fsf@flood.ping.uio.no>
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Hi Hackers, So, I have installed linux_kdump package, tried to run 'ktrace' on my binary and then analyze the ktrace.out with 'linux_kdump'. This is the point where it ain't working no more on the 4.7 jail system: 73506 engine NAMI "/var/run/engine.pid" 73506 engine RET linux_open 3 73506 engine CALL linux_fcntl64(0x3,0x6,0xbfbfe7b0) 73506 engine RET linux_fcntl64 -1 errno 22 Invalid argument And it works on the 4.8 jail system: 31291 engine NAMI "/var/run/engine.pid" 31291 engine RET linux_open 3 31291 engine CALL linux_fcntl64(0x3,0x6,0xbfbfe820) 31291 engine RET linux_fcntl64 0 31291 engine CALL linux_getpid 31291 engine RET linux_getpid 31291/0x7a3b 31291 engine CALL oftruncate(0x3,0) 31291 engine RET oftruncate 0 31291 engine CALL write(0x3,0x864c304,0x6) 31291 engine GIO fd 3 wrote 6 bytes So, again, any ideas why this linux binary can get a lock on the '/var/run/engine.pid' file under a freebsd 4.8 jail, and cannot on a 4.7 jail? Thank you, bogdan On Thu, 15 May 2003, Dag-Erling Smorgrav wrote: > Bogdan TARU <bgd@icomag.de> writes: > > As about the third parameter to semget, as > > far as I can read in semget(2) the third parameter (flag) is an integer, > > not a pointer? > > 0xbfsomething is definitely a pointer to a stack variable. You're > probably using kdump instead of linux_kdump; syscall 221 is semget in > FreeBSD but fcntl64 in Linux. The first argument is the fd (notice > that it's 3 which is the result of the preceding open call; open is > syscall 5 in both FreeBSD and Linux, so this one is correct), the > second is the operation (6 == F_SETLK in Linux), and the third is the > argument (for F_SETLK, a pointer to a struct flock). > > I recommend 'pkg_add -r linux_kdump'. > > DES > -- > Dag-Erling Smorgrav - des@ofug.org >
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