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Annotation of cci/usr/src/man/man2/kill.2, revision 1.1.1.2

1.1       root        1: .TH KILL 2 "27 July 1983"
                      2: .UC 4
                      3: .SH NAME
                      4: kill \- send signal to a process
                      5: .SH SYNOPSIS
                      6: .ft B
                      7: kill(pid, sig)
                      8: .br
                      9: int pid, sig;
                     10: .SH DESCRIPTION
                     11: .I Kill
                     12: sends the signal \fIsig\fP
                     13: to a process, specified by the process number
                     14: .IR pid .
                     15: .I Sig
                     16: may be one of the signals specified in
                     17: .IR sigvec (2),
                     18: or it may be 0, in which case
                     19: error checking is performed but no
                     20: signal is actually sent. 
                     21: This can be used to check the validity of
                     22: .IR pid .
                     23: .PP
                     24: The sending and receiving processes must
                     25: have the same effective user ID, otherwise
                     26: this call is restricted to the super-user.
                     27: A single exception is the signal SIGCONT which may always be sent
                     28: to any child or grandchild of the current process.
                     29: .PP
                     30: If the process number is 0,
                     31: the signal is sent to all other processes in the
                     32: sender's process group; this is a variant of
                     33: .IR killpg (2).
                     34: .PP
                     35: If the process number is \-1, and the user is the super-user,
                     36: the signal is broadcast universally
                     37: except to system processes
                     38: and the process sending the signal.
                     39: .PP
                     40: Processes may send signals to themselves.
                     41: .SH "RETURN VALUE
                     42: Upon successful completion, a value of 0 is returned.
                     43: Otherwise, a value of \-1 is returned and
                     44: .I errno
                     45: is set to indicate the error.
                     46: .SH "ERRORS
                     47: .I Kill
1.1.1.2 ! root       48: fails and no signal is sent if any of the following
1.1       root       49: occur:
                     50: .TP 15
                     51: [EINVAL]
                     52: \fISig\fP is not a valid signal number.
                     53: .TP 15
                     54: [ESRCH]
                     55: No process can be found corresponding to that specified by \fIpid\fP.
                     56: .TP 15
                     57: [EPERM]
                     58: The sending process is not the super-user and its effective
                     59: user id does not match the effective user-id of the receiving process.
                     60: .SH "SEE ALSO"
                     61: getpid(2), getpgrp(2), killpg(2), sigvec(2)

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