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KILLPG

Section: POSIX Programmer's Manual (3P)
Updated: 2013
Index Return to Main Contents
 

PROLOG

This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (consult the corresponding Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.

 

NAME

killpg --- send a signal to a process group  

SYNOPSIS

#include <signal.h>
int killpg(pid_t pgrp, int sig);
 

DESCRIPTION

The killpg() function shall send the signal specified by sig to the process group specified by pgrp. If pgrp is greater than 1, killpg(pgrpsig) shall be equivalent to kill(-pgrpsig). If pgrp is less than or equal to 1, the behavior of killpg() is undefined.  

RETURN VALUE

Refer to kill().  

ERRORS

Refer to kill().

The following sections are informative.  

EXAMPLES

 

Sending a Signal to All Other Members of a Process Group

The following example shows how the calling process could send a signal to all other members of its process group. To prevent itself from receiving the signal it first makes itself immune to the signal by ignoring it.


#include <signal.h>
#include <unistd.h>
...
    if (signal(SIGUSR1, SIG_IGN) == SIG_ERR)
        /* Handle error */;
    if (killpg(getpgrp(), SIGUSR1) == -1)
        /* Handle error */;"
 

APPLICATION USAGE

None.  

RATIONALE

None.  

FUTURE DIRECTIONS

None.  

SEE ALSO

getpgid(), getpid(), kill(), raise() The Base Definitions volume of POSIX.1-2008, <signal.h>  

COPYRIGHT

Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 7, Copyright (C) 2013 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. (This is POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) In the event of any discrepancy between this version and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained online at http://www.unix.org/online.html .

Any typographical or formatting errors that appear in this page are most likely to have been introduced during the conversion of the source files to man page format. To report such errors, see https://www.kernel.org/doc/man-pages/reporting_bugs.html .


 

Index

PROLOG
NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
ERRORS
EXAMPLES
Sending a Signal to All Other Members of a Process Group
APPLICATION USAGE
RATIONALE
FUTURE DIRECTIONS
SEE ALSO
COPYRIGHT


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