NAME

tcsetpgrp - set foreground process group ID

SYNOPSIS

#include <sys/types.h>
#include <unistd.h>
int tcsetpgrp(int fildes, pid_t pgid_id);

DESCRIPTION

If the process has a controlling terminal, tcsetpgrp() will set the foreground process group ID associated with the terminal to pgid_id. The file associated with fildes must be the controlling terminal of the calling process and the controlling terminal must be currently associated with the session of the calling process. The value of pgid_id must match a process group ID of a process in the same session as the calling process.

RETURN VALUES

Upon successful completion, 0 is returned. Otherwise, −1 is returned and errno is set to indicate the error.

ERRORS

The tcsetpgrp() function will fail if:

EBADF

The fildes argument is not a valid file descriptor.

EINVAL

This implementation does not support the value in the pgid_id argument.

ENOTTY

The calling process does not have a controlling terminal, or the file is not the controlling terminal, or the controlling terminal is no longer associated with the session of the calling process.

EIO

The process is not ignoring or holding SIGTTOU and is a member of an orphaned process group.

EPERM

The value of pgid_id does not match the process group ID of a process in the same session as the calling process.

ATTRIBUTES

See attributes(7) for descriptions of the following attributes:

ATTRIBUTE TYPE	ATTRIBUTE VALUE
Interface Stability	Standard
MT-Level	MT-Safe, and Async-Signal-Safe