03-02-2005
RTM,
Thank you for your reply. I am aware of the fact that "No homework/classwork questions". I am writing some IPC code, and I am facing some difficulties. For example, for my 1st question , i am confused about, when I kill process2, process1 remains there, and when I kill process1, process2 remains there 9isnt this weird??), and thats why i posted the question in a simple manner. Also for rest of th questions, same thing, I know that, stromg kill is called as strong coz, it cannot be caught by the process, and in turn process gets terminated, but I wanted to find what actually happens "internally".
I hope i have cleared that those are not homework/classwork questions.
Thank you
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KILL(1) General Commands Manual KILL(1)
NAME
kill - terminate a process with extreme prejudice
SYNOPSIS
kill [ -sig ] processid ...
kill -l
DESCRIPTION
Kill sends the TERM (terminate, 15) signal to the specified processes. If a signal name or number preceded by `-' is given as first argu-
ment, that signal is sent instead of terminate (see sigvec(2)). The signal names are listed by `kill -l', and are as given in
/usr/include/signal.h, stripped of the common SIG prefix.
The terminate signal will kill processes that do not catch the signal; `kill -9 ...' is a sure kill, as the KILL (9) signal cannot be
caught. By convention, if process number 0 is specified, all members in the process group (i.e. processes resulting from the current
login) are signaled (but beware: this works only if you use sh(1); not if you use csh(1).) Negative process numbers also have special
meanings; see kill(2) for details.
The killed processes must belong to the current user unless he is the super-user.
The process number of an asynchronous process started with `&' is reported by the shell. Process numbers can also be found by using ps(1).
Kill is a built-in to csh(1); it allows job specifiers of the form ``%...'' as arguments so process id's are not as often used as kill
arguments. See csh(1) for details.
SEE ALSO
csh(1), ps(1), kill(2), sigvec(2)
BUGS
A replacement for ``kill 0'' for csh(1) users should be provided.
4th Berkeley Distribution April 20, 1986 KILL(1)