tcgetpgrp(3) BSD Library Functions Manual tcgetpgrp(3)
NAME
tcgetpgrp -- get foreground process group ID
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <unistd.h>
pid_t
tcgetpgrp(int fildes);
DESCRIPTION
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.
ERRORS
If an error occurs, tcgetpgrp() returns -1 and the global variable errno
is set to indicate the error, as follows:
[EBADF] The fildes argument is not a valid file descriptor.
[ENOTTY] The calling process does not have a controlling termi-
nal or the underlying terminal device represented by
fildes is not the controlling terminal.
LEGACY SYNOPSIS
#include <sys/types.h>
#include <unistd.h>
The include file <sys/types.h> is necessary.
SEE ALSO
setpgid(2), setsid(2), tcsetpgrp(3), compat(5)
STANDARDS
The tcgetpgrp() function is expected to be compliant with the IEEE Std
1003.1-1988 (``POSIX.1'') specification.
BSD June 4, 1993 BSD
Mac OS X 10.8 - Generated Fri Aug 31 15:46:47 CDT 2012