tcgetpgrp(3) [osx man page]

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 terminal 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

TCSETPGRP(3)						   BSD 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 fildes, pid_t pgid_id);

DESCRIPTION

     If the process has a controlling terminal, the tcsetpgrp() function sets the foreground process group ID associated with the terminal device
     to pgid_id.  The terminal device associated with fildes 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 pgid_id must be the same as the process group ID of a
     process in the same session as the calling process.

RETURN VALUES

     The tcsetpgrp() function returns the value 0 if successful; otherwise the value -1 is returned and the global variable errno is set to indi-
     cate the error.

ERRORS

     The tcsetpgrp() function will fail if:

     [EBADF]		The fildes argument is not a valid file descriptor.

     [EINVAL]		An invalid value of pgid_id was specified.

     [ENOTTY]		The calling process does not have a controlling terminal, or the file represented by fildes is not the controlling termi-
			nal, or the controlling terminal is no longer associated with the session of the calling process.

     [EPERM]		The pgid_id argument does not match the process group ID of a process in the same session as the calling process.

LEGACY SYNOPSIS

     #include <sys/types.h>
     #include <unistd.h>

     The include file <sys/types.h> is necessary.

SEE ALSO

     setpgid(2), setsid(2), tcgetpgrp(3), compat(5)

STANDARDS

     The tcsetpgrp() function is expected to be compliant with the IEEE Std 1003.1-1988 (``POSIX.1'') specification.

BSD
								   June 4, 1993 							       BSD