MirOS Manual: killpg(3)

KILLPG(3)                  BSD Programmer's Manual                   KILLPG(3)

NAME

     killpg - send signal to a process group

SYNOPSIS

     #include <signal.h>

     int
     killpg(pid_t pgrp, int sig);

DESCRIPTION

     killpg() sends the signal sig to the process group pgrp. See sigaction(2)
     for a list of signals. If pgrp is 0, killpg() sends the signal to the
     sending process's process group.

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

RETURN VALUES

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

ERRORS

     killpg() will fail and no signal will be sent if:

     [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 superuser and one or more of
                   the target processes has an effective user ID different
                   from that of the sending process.

SEE ALSO

     getpgrp(2), kill(2), sigaction(2)

HISTORY

     The killpg() function call appeared in 4.0BSD.

MirOS BSD #10-current           March 10, 1991                               1

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