TCSETPGRP(3) |
Library Functions Manual |
TCSETPGRP(3) |
NAME
tcsetpgrp — set foreground process group ID
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <unistd.h>
int
tcsetpgrp(int fd, pid_t pgrp_id);
DESCRIPTION
If the process has a controlling terminal, the
tcsetpgrp function sets the foreground process group ID associated with the terminal device to
pgrp_id. The terminal device associated with
fd 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
pgrp_id must be the same as the process group ID of a process in the same session as the calling process.
Upon successful completion, tcsetpgrp returns a value of zero.
ERRORS
If an error occurs,
tcgetpgrp returns -1 and the global variable
errno is set to indicate the error, as follows:
-
[EBADF]
-
The fd argument is not a valid file descriptor.
-
[EINVAL]
-
An invalid value of pgrp_id was specified.
-
[ENOTTY]
-
The calling process does not have a controlling terminal, or the file represented by fd is not the controlling terminal, or the controlling terminal is no longer associated with the session of the calling process.
-
[EPERM]
-
The pgrp_id argument does not match the process group ID of a process in the same session as the calling process.
STANDARDS
The tcsetpgprp function conforms to IEEE Std 1003.1-1990 (“POSIX.1”).