I'm running linux slackware 10.1, kernel 2.6.11.2. The "killall"
command used to work correctly, but in the last days it doesn't work
anymore (apparently with no reason).

$ yes > /dev/null &
[1] 3111
$ killall yes
yes: no process killed
$ kill 3111
$
[1]+  Terminated          yes >/dev/null
$

and the same goes for every program. This is particularly annoying
since the shutdown scripts use that command a lot (to shut down pppd,
mysql, etc.). I  already tried to reinstall the executable from the
original slackware package, but nothing changed.

Any ideas? Someone saw this before?

Thanks for any help

[ Post a follow-up to this message ]

In article <1116966969.908316.164830@g43g2000cwa.googlegroups.com>, subnet wrote:
> I'm running linux slackware 10.1, kernel 2.6.11.2. The "killall"
> command used to work correctly, but in the last days it doesn't work
> anymore (apparently with no reason).
>
> $ yes > /dev/null &
> [1] 3111
> $ killall yes
> yes: no process killed
> $ kill 3111
> $
> [1]+  Terminated          yes >/dev/null
> $
>
> and the same goes for every program. This is particularly annoying
> since the shutdown scripts use that command a lot (to shut down pppd,
> mysql, etc.). I  already tried to reinstall the executable from the
> original slackware package, but nothing changed.
>
> Any ideas? Someone saw this before?
>
> Thanks for any help
>

Have you checked to see if killall has been corrupted? - e.g.:

$ rpm -qf /usr/bin/killall
psmisc-21.4-2
$ rpm -V psmisc-21.4-2


--
Jim Cochrane; jtc@dimensional.com
[When responding by email, include the term non-spam in the subject line
 to
get through my spam filter.]

[ Post a follow-up to this message ]

> Have you checked to see if killall has been corrupted? - e.g.:
>
> $ rpm -qf /usr/bin/killall
> psmisc-21.4-2
> $ rpm -V psmisc-21.4-2

I redownloaded the procps package from slackware. (contains ps, free,
killall, w, top, pmap, fuser,  lsdev, pkill, skill, tload, watch,
slabtop, pstree, uptime, vmstat, procinfo, socklist, sysctl) and did a
fresh reinstall, but nothing changed. I also recompiled the kernel to
no avail.

Thanks

[ Post a follow-up to this message ]

"subnet" <sunglo@katamail.com> writes:
 
>
> I redownloaded the procps package from slackware. (contains ps, free,
> killall, w, top, pmap, fuser,  lsdev, pkill, skill, tload, watch,
> slabtop, pstree, uptime, vmstat, procinfo, socklist, sysctl) and did a
> fresh reinstall, but nothing changed. I also recompiled the kernel to
> no avail.

Try running strace on killall to see what it's really doing.

--
Måns Rullgård
mru@inprovide.com

[ Post a follow-up to this message ]

"Måns Rullgård" <mru@inprovide.com> wrote in message
news:yw1xll64w7u3.fsf@ford.inprovide.com...

> Try running strace on killall to see what it's really doing.

Good advice. You may find something obvious, like /proc not being
mounted or permissions being set improperly.

DS

[ Post a follow-up to this message ]

> Try running strace on killall to see what it's really doing.

Here are the outputs on my machine and on another box where killall
works.

The working one (yes has pid 29966)

$ strace killall yes
...
open("/proc/29966/stat", O_RDONLY)      = 3
fstat64(3, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS,
-1, 0) = 0x40014000
read(3, "29966 (yes) R 29782 29966 29782 "..., 4096) = 178
close(3)                                = 0
munmap(0x40014000, 4096)                = 0
kill(29966, SIGTERM)                    = 0
open("/proc/29967/stat", O_RDONLY)      = 3
...

And here is the ouput of the broken killall (yes has pid 2336):

$ strace killall yes
...
open("/proc/2336/stat", O_RDONLY|O_LARGEFILE) = 3
fstat64(3, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS,
-1, 0) = 0xb7e6c000
read(3, "2336 (yes) R 2325 2336 2325 3481"..., 1024) = 176
close(3)                                = 0
munmap(0xb7e6c000, 4096)                = 0
stat64("/proc/2336/exe", {st_mode=S_IFREG|0755, st_size=12212, ...}) =
0
open("/proc/2337/stat", O_RDONLY|O_LARGEFILE) = 3
fstat64(3, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
...
and kill() is not called.

The first killall is version killall (psmisc) 20.2, and the "broken"
one (worked until two days ago) is killall (psmisc) 21.4. Seems to me
that the difference is that the newer version also opens
/proc/<pid>/exe, and the old_mmap() return values are quite different
but, apart from that, I see nothing that could give some clue about the
wrong behaviour.

Thanks for your replies.

[ Post a follow-up to this message ]