tcgetpgrp
—
get foreground process group ID
Standard C Library (libc, -lc)
#include <unistd.h>
pid_t
tcgetpgrp
(int
fd);
The tcgetpgrp
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.
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.
The tcgetpgrp
function conforms to IEEE
Std 1003.1-1990 (“POSIX.1”).