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.
SEE ALSO
setpgid(2),
setsid(2),
tcgetpgrp(3)
STANDARDS
The
tcsetpgprp function conforms to
IEEE Std
1003.1-1990 (“POSIX.1”).