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killpg(2)
NAME
  killpg - Send a signal to a process group

SYNOPSIS
  #include <signal.h>

  int killpg(
	  pid_t process_grp,
	  int signal );

  Application developers may want to specify an #include statement for
  <sys/types.h> before the one for <signal.h> if programs are being developed
  for multiple platforms. The additional #include statement is not required
  on Tru64 UNIX systems or by ISO or XSH standards, but may be on other
  vendors' systems that conform to these standards.

STANDARDS
  Interfaces documented on this reference page conform to industry standards
  as follows:

  killpg(): XSH4.2, XSH5.0

  Refer to the standards(5) reference page for more information about
  industry standards and associated tags.

PARAMETERS
  process_grp
      Specifies the process group.

  signal
      Specifies the signal.  If the signal parameter is a value of 0 (zero,
      the null signal), error checking is performed but no signal is sent.
      This parameter can be used to check the validity of the process
      parameter.

DESCRIPTION
  The killpg() function sends the signal specified by the signal parameter to
  the group of processes specified by the process_grp parameter.

  The process sending the signal must have the same effective user ID or
  saved set-user-ID as the members of the process group, or the sending
  process must belong to the superuser.	 The continue signal, SIGCONT, is a
  special case: it may be sent to any process that is a descendent of the
  current process.

RETURN VALUES
  Upon successful completion, the killpg() function returns a value of 0
  (zero). Otherwise, a value of -1 is returned, and errno is set to indicate
  the error.

ERRORS
  If any of the following conditions occurs, the killpg() function sets errno
  to the corresponding value:

  [EINVAL]
      The signal parameter is not a valid signal number.

  [ESRCH]
      No process can be found in process_grp.

      [Tru64 UNIX]  The process group was given as 0 (zero), but the sending
      process does not have a process group.

  [EPERM]
      The real or saved user ID does not match the real or effective user ID
      of the receiving process, the calling process does not have the
      appropriate privilege, and the process is not sending a SIGCONT signal
      to one of its session's processes.

SEE ALSO
  Functions: getpid(2), kill(2), setpgid(2), sigaction(2), sigvec(2),
  raise(3)

  Standards: standards(5)

Index for Section 2

Alphabetical listing for K

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