> Date: Thu, 15 May 1997 10:19:47 -0700 (PDT)
> From: Edward McKnight <[EMAIL PROTECTED]>
> Subject: Re: How do I kill jobs?
> To: [EMAIL PROTECTED], [EMAIL PROTECTED]
> Cc: debian-user@lists.debian.org
> Resent-From: debian-user@lists.debian.org
>
> This answer invariably comes up on Unix-related lists.
>
> This answer suggests that you use a howitzer to blow away what might be
> only a field mouse.
>
> kill -9 is a *last resort*. Study up on signals.
>
> Start with no value at all; if that kill doesn't work you progress
> through stronger and stronger signals until finally, if all other
> signals have failed you reluctantly decide that the field mouse is in
> fact utterly resistant. Then you go for the howitzer.
>
> Lots of programs written for the Unix environment will trap various
> signals. An extremely common one is -3 (KILL, the same as ^C from the
^^^^^^^
Whoops! whoops! Caught by my own too-fastness! KILL *is* -9. Urk.
Shoulda been QUIT.
#define SIGHUP 1 /* hangup */
#define SIGINT 2 /* interrupt (rubout) */
#define SIGQUIT 3 /* quit (ASCII FS) */
#define SIGILL 4 /* illegal instruction (not reset when caught) */
#define SIGTRAP 5 /* trace trap (not reset when caught) */
#define SIGIOT 6 /* IOT instruction */
#define SIGABRT 6 /* used by abort, replace SIGIOT in the future */
#define SIGEMT 7 /* EMT instruction */
#define SIGFPE 8 /* floating point exception */
#define SIGKILL 9 /* kill (cannot be caught or ignored) */
#define SIGBUS 10 /* bus error */
#define SIGSEGV 11 /* segmentation violation */
#define SIGSYS 12 /* bad argument to system call */
#define SIGPIPE 13 /* write on a pipe with no one to read it */
#define SIGALRM 14 /* alarm clock */
#define SIGTERM 15 /* software termination signal from kill */
#define SIGUSR1 16 /* user defined signal 1 */
#define SIGUSR2 17 /* user defined signal 2 */
#define SIGCLD 18 /* child status change */
#define SIGCHLD 18 /* child status change alias (POSIX) */
#define SIGPWR 19 /* power-fail restart */
#define SIGWINCH 20 /* window size change */
#define SIGURG 21 /* urgent socket condition */
#define SIGPOLL 22 /* pollable event occured */
#define SIGIO SIGPOLL /* socket I/O possible (SIGPOLL alias) */
...
The above is from Solaris but *should* be the same as Linux.
I think the preferred sequence is: no value, -15, -3, -9.
Shoot me if I'm wrong, please ;)
--emk
> keyboard.) A program can trap the signal then ***do housekeeping*** and
> exit gracefully.
>
> -9 *cannot* be caught. You increase your chances of causing the
> interrupted program to have difficulty starting again if it stores
> state on disk--things like hidden files that it uses for its own
> purposes and normally deletes on exit--log file entries...whatever.
>
> Be civilized. Use -9 only in extremis.
>
> Note also that named values are considered by some to be superior to
> numbers. See /usr/include/signal.h.
>
> --emk
>
>
>
> > Date: Thu, 15 May 1997 11:22:36 -0400 (EDT)
> > From: Paul McDermott <[EMAIL PROTECTED]>
> > To: Alberto Ruiz <[EMAIL PROTECTED]>
> > cc: debian-user@lists.debian.org
> > Subject: Re: How do I kill jobs?
> > Resent-From: debian-user@lists.debian.org
> >
> > to kill a process you must be root if it is not run by you. the command
> > is kill -9 (pid). To see the pid do a ps -aux.
> >
> > On Thu, 15 May 1997, Alberto Ruiz wrote:
> >
> > > Hi,
> > >
> > > How do I list all the jobs, in HP-UX or Solaris, I do ps -eaf and it
> > > lists
> everything, but I don't think is the same in Linux. I'm just guessing i way
to
> change the setting on Xwindows by killing Xwindows, modifying the XF86Config
> file andrestarting Xwindows. Am I going in the right way?
> > >
> > > Alberto Ruiz
> > > [EMAIL PROTECTED]
> > >
> > >
> > > --
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> > >
> >
> >
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>
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