Content-type: text/html Man page of killpg

killpg

Section: System Calls (2)
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NAME

killpg - Sends a signal to a process group  

LIBRARY

Standard C Library (libc.so, libc.a)  

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 X/Open standards, but may be required on other vendors' systems that conform to these standards.  

STANDARDS

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

killpg():  XPG4-UNIX

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

PARAMETERS

Specifies the process group. 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: The signal parameter is not a valid signal number. No process can be found in process_grp.

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

RELATED INFORMATION

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

Standards: standards(5) delim off


 

Index

NAME
LIBRARY
SYNOPSIS
STANDARDS
PARAMETERS
DESCRIPTION
RETURN VALUES
ERRORS
RELATED INFORMATION

This document was created by man2html, using the manual pages.
Time: 02:40:14 GMT, October 02, 2010