NAME
tcgetpgrp —
get foreground process group
ID
LIBRARY
library “libc”
SYNOPSIS
#include
<unistd.h>
pid_t
tcgetpgrp(int
fd);
DESCRIPTION
Thetcgetpgrp function returns the value of the process
group ID of the foreground process group associated with the terminal device.
If there is no foreground process group, tcgetpgrp
returns an invalid process ID.
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.
- [
ENOTTY] - The calling process does not have a controlling terminal or the underlying terminal device represented by fd is not the controlling terminal.
SEE ALSO
STANDARDS
The tcgetpgrp function conforms to
IEEE Std 1003.1-1990 (“POSIX.1”).