Messages in this thread | | | Date | Tue, 28 Mar 2006 16:03:53 -0500 | From | Gene Heskett <> | Subject | Re: Possible breakage in 2.6.16? |
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On Tuesday 28 March 2006 13:19, linux-os (Dick Johnson) wrote: >On Tue, 28 Mar 2006, Gene Heskett wrote: Dick, this may be a resend to you, but I can't find it in my sent-mail box. Honest, I did go thru the motions :)
>> Greetings; >> >> Always curious as to what sort of information can be extracted from >> the tools linux gives us, I've discovered that netstat, from the >> >> net-tools-1.60-25.1 rpm >> >> no longer functions for anything as even a 'netstat --version' takes >> the curser to the upper left corner of the screen and hangs till >> ctl+c'd. >> >> The only evidence of its execution is a steady, about 2 per second, >> increase in the number of processes running as reported by gkrellm, >> all of which go away when I ctl+c netstat itself. >> >> I'm running 2.6.16 self configured here. >> >> Is this a known problem because my net-tools rpm is old? Or because >> 2.6.16 broke it? > >strace netstat --version 2>info.txt >^C > >Then read info.txt and see what it called that doesn't return.
It appears strace does about 5-6 pages of its own setup, then this: --------------------open("/root/bin/netstat", O_RDONLY|O_LARGEFILE) = 3 ioctl(3, SNDCTL_TMR_TIMEBASE or TCGETS, 0xaf86e2e8) = -1 ENOTTY (Inappropriate ioctl for device) _llseek(3, 0, [0], SEEK_CUR) = 0 read(3, "#!/bin/bash\nreset\nwhile [ 1 ] ; "..., 80) = 80 _llseek(3, 0, [0], SEEK_SET) = 0 getrlimit(RLIMIT_NOFILE, {rlim_cur=1024, rlim_max=1024}) = 0 dup2(3, 255) = 255 close(3) = 0 fcntl64(255, F_SETFD, FD_CLOEXEC) = 0 fcntl64(255, F_GETFL) = 0x8000 (flags O_RDONLY| O_LARGEFILE) fstat64(255, {st_mode=S_IFREG|0755, st_size=124, ...}) = 0 _llseek(255, 0, [0], SEEK_CUR) = 0 rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0 read(255, "#!/bin/bash\nreset\nwhile [ 1 ] ; "..., 124) = 124 rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0 stat64(".", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0 stat64("/root/bin/reset", 0xaf86e160) = -1 ENOENT (No such file or directory) stat64("/usr/java/bin/reset", 0xaf86e160) = -1 ENOENT (No such file or directory) stat64("/usr/bin/reset", {st_mode=S_IFREG|0755, st_size=36216, ...}) = 0 stat64("/usr/bin/reset", {st_mode=S_IFREG|0755, st_size=36216, ...}) = 0 rt_sigprocmask(SIG_BLOCK, [INT CHLD], [], 8) = 0 _llseek(255, -106, [18], SEEK_CUR) = 0 clone(child_stack=0, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID| SIGCHLD, child_tidptr=0xa7f480c8) = 6558 rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0 rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0 rt_sigaction(SIGINT, {0x8074990, [], 0}, {SIG_DFL}, 8) = 0 waitpid(-1, tset: standard error: Inappropriate ioctl for device
[{WIFEXITED(s) && WEXITSTATUS(s) == 1}], 0) = 6558 rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 --- SIGCHLD (Child exited) @ 0 (0) --- waitpid(-1, 0xaf86dee8, WNOHANG) = -1 ECHILD (No child processes) sigreturn() = ? (mask now []) rt_sigaction(SIGINT, {SIG_DFL}, {0x8074990, [], 0}, 8) = 0 rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0 read(255, "while [ 1 ] ; do\n\n netstat -a "..., 124) = 106 rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0 rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0 rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0 pipe([3, 4]) = 0 rt_sigprocmask(SIG_BLOCK, [INT CHLD], [CHLD], 8) = 0 _llseek(255, -1, [123], SEEK_CUR) = 0 clone(tset: standard error: Inappropriate ioctl for device
tset: standard error: Inappropriate ioctl for device
child_stack=0, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0xa7f480c8) = 6559 rt_sigprocmask(SIG_SETMASK, [CHLD], NULL, 8) = 0 close(4) = 0 close(4) = -1 EBADF (Bad file descriptor) rt_sigprocmask(SIG_BLOCK, [INT CHLD], [CHLD], 8) = 0 clone(child_stack=0, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID| SIGCHLD, child_tidptr=0xa7f480c8) = 6580 rt_sigprocmask(SIG_SETMASK, [CHLD], NULL, 8) = 0 close(3) = 0 rt_sigprocmask(SIG_BLOCK, [CHLD], [CHLD], 8) = 0 rt_sigprocmask(SIG_SETMASK, [CHLD], NULL, 8) = 0 rt_sigprocmask(SIG_BLOCK, [CHLD], [CHLD], 8) = 0 rt_sigaction(SIGINT, {0x8074990, [], 0}, {SIG_DFL}, 8) = 0 waitpid(-1, tset: standard error: Inappropriate ioctl for device
tset: standard error: Inappropriate ioctl for device
tset: standard error: Inappropriate ioctl for device
tset: standard error: Inappropriate ioctl for device --------------------- And theres a couple more megabytes of that last line till I ctl+c'd it. I did that when gkrellm said it was up to about 990 processes from the normal 220 or so here.
But I have NDI what it all _really_ means. And I just built and rebooted to 2.6.16.1 with no change in this seemingly weird behaviour.
Thanks all
-- Cheers, Gene People having trouble with vz bouncing email to me should add the word 'online' between the 'verizon', and the dot which bypasses vz's stupid bounce rules. I do use spamassassin too. :-) Yahoo.com and AOL/TW attorneys please note, additions to the above message by Gene Heskett are: Copyright 2006 by Maurice Eugene Heskett, all rights reserved. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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