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Full Discussion: Kill -9 within Bash script kicks out usage info
Top Forums Shell Programming and Scripting Kill -9 within Bash script kicks out usage info Post 302332621 by vgersh99 on Thursday 9th of July 2009 03:35:40 PM
Old 07-09-2009
There's a bash builtin 'kill' which is different from the '/usr/bin/kill'.
Also when you do 'sudo' it most likely defaults to '/bin/sh' which has no builtin 'kill'.
The 'signatures' for '/usr/bin/kill' and bash's builtin 'kill' are different.
'man bash':
Code:
     kill [-s sigspec | -n signum | -sigspec] [pid | jobspec] ...
     kill -l [sigspec | exit_status]
          Send the signal named  by  sigspec  or  signum  to  the
          processes named by pid or jobspec.  sigspec is either a
          signal name such as SIGKILL or a signal number;  signum
          is  a  signal number.  If sigspec is a signal name, the
          name may be given with or without the SIG  prefix.   If
          sigspec  is  not  present, then SIGTERM is assumed.  An
          argument of -l lists the signal names.   If  any  argu-
          ments  are  supplied when -l is given, the names of the
          signals corresponding to the arguments are listed,  and
          the return status is 0.  The exit_status argument to -l
          is a number specifying either a signal  number  or  the
          exit  status of a process terminated by a signal.  kill
          returns true if at least one  signal  was  successfully
          sent,  or false if an error occurs or an invalid option
          is encountered.

Last edited by vgersh99; 07-09-2009 at 04:43 PM..
 

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LEARN ABOUT OPENDARWIN

kill

KILL(1) 						    BSD General Commands Manual 						   KILL(1)

NAME

     kill -- terminate or signal a process

SYNOPSIS

     kill [-s signal_name] pid ...
     kill -l [exit_status]
     kill -signal_name pid ...
     kill -signal_number pid ...

DESCRIPTION

     The kill utility sends a signal to the processes specified by the pid operand(s).

     Only the super-user may send signals to other users' processes.

     The options are as follows:

     -s signal_name
	     A symbolic signal name specifying the signal to be sent instead of the default TERM.

     -l [exit_status]
	     If no operand is given, list the signal names; otherwise, write the signal name corresponding to exit_status.

     -signal_name
	     A symbolic signal name specifying the signal to be sent instead of the default TERM.

     -signal_number
	     A non-negative decimal integer, specifying the signal to be sent instead of the default TERM.

     The following pids have special meanings:
     -1      If superuser, broadcast the signal to all processes; otherwise broadcast to all processes belonging to the user.

     Some of the more commonly used signals:
     1	     HUP (hang up)
     2	     INT (interrupt)
     3	     QUIT (quit)
     6	     ABRT (abort)
     9	     KILL (non-catchable, non-ignorable kill)
     14      ALRM (alarm clock)
     15      TERM (software termination signal)

     Some shells may provide a builtin kill command which is similar or identical to this utility.  Consult the builtin(1) manual page.

SEE ALSO

     builtin(1), csh(1), killall(1), ps(1), kill(2), sigaction(2)

STANDARDS

     The kill function is expected to be IEEE Std 1003.2 (``POSIX.2'') compatible.

HISTORY

     A kill command appeared in Version 6 AT&T UNIX.

BUGS

     A replacement for the command ``kill 0'' for csh(1) users should be provided.

BSD
								  April 28, 1995							       BSD
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