KILLPG(2-BSD)       RISC/os Reference Manual        KILLPG(2-BSD)



NAME
     killpg - send signal to a process group

SYNOPSIS
     killpg(pgrp, sig)
     int pgrp, sig;

DESCRIPTION
     killpg sends the signal sig to the process group pgrp.  See
     sigvec(2) for a list of signals.

     The sending process and members of the process group must
     have the same effective user ID, or the sender must be the
     super-user.  As a single special case the continue signal
     SIGCONT may be sent to any process that is a descendant of
     the current process.

RETURN VALUE
     Upon successful completion, a value of 0 is returned.  Oth-
     erwise, a value of -1 is returned and the global variable
     errno is set to indicate the error.

ERRORS
     killpg will fail and not signal will be sent if any of the
     following occur:

     [EINVAL]            Sig is not a valid signal number.

     [ESRCH]             No process can be found in the process
                         group specified by pgrp.

     [ESRCH]             The process group was given as 0 but the
                         sending process does not have a process
                         group.

     [EPERM]             The sending process is not the super-
                         user and one or more of the target
                         processes has an effective user ID dif-
                         ferent from that of the sending process.

SEE ALSO
     kill(2), getpgrp(2), sigvec(2)













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