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tcsetpgrp()

Set the process group ID for a device

Synopsis:

#include <sys/types.h>
#include <unistd.h>

int tcsetpgrp( int fildes,
               pid_t pgrp_id );

Arguments:

fildes

A file descriptor that's associated with the device whose process group ID you want to set.

pgrp_id

The process group ID that you want to assign to the device.

Library:

libc

Use the -l c option to qcc to link against this library. This library is usually included automatically.

Description:

The tcsetpgrp() function sets the process group ID associated with the device indicated by fildes to be pgrp_id.

If successful, the tcsetpgrp() function causes subsequent breaks on the indicated terminal device to generate a SIGINT on all process in the given process group.

Returns:

0

Success.

-1

An error occurred (errno is set).

Errors:

EBADF

The argument fildes is invalid.

EINVAL

The argument pgrp_id is invalid.

ENOSYS

The resource manager associated with fildes doesn't support this call.

ENOTTY

The argument fildes isn't associated with a terminal device.

EPERM

The argument pgrp_id isn't part of the same session as the calling process.

Examples:

#include <sys/types.h>
#include <unistd.h>
#include <stdlib.h>

int main( void )
  {
    /*
     * Direct breaks on stdin to me
     */
    tcsetpgrp( 0, getpid() );
    return EXIT_SUCCESS;
  }

Classification:

POSIX 1003.1

Safety:
Cancellation point	No
Interrupt handler	No
Signal handler	Yes
Thread	Yes

See also:

signal(), tcgetpgrp()

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