NAME
TIOCGPGRP, TIOCSPGRP, TIOCGSID - process group and session ID
LIBRARY
Standard C library (libc, -lc)
SYNOPSIS
#include <asm/termbits.h>\n /* Definition of \nTIOC*\n constants */
\n#include <sys/ioctl.h>int ioctl(int \nfd\n, TIOCGPGRP, pid_t *\nargp\n);\n
\nint ioctl(int \nfd\n, TIOCSPGRP, const pid_t *\nargp\n);\n
\nint ioctl(int \nfd\n, TIOCGSID, pid_t *\nargp\n);DESCRIPTION
- TIOCGPGRP
When successful, equivalent to *argp = tcgetpgrp(fd).
Get the process group ID of the foreground process group on this terminal.
- TIOCSPGRP
Equivalent to tcsetpgrp(fd, *argp).
Set the foreground process group ID of this terminal.
- TIOCGSID
When successful, equivalent to *argp = tcgetsid(fd).
Get the session ID of the given terminal. This fails with the error ENOTTY if the terminal is not a master pseudoterminal and not our controlling terminal. Strange.
RETURN VALUE
On success, 0 is returned. On error, -1 is returned, and errno is set to indicate the error.
ERRORS
- ENOTTY
The terminal is not a master pseudoterminal and not our controlling terminal.
- EPERM
Insufficient permission.
SEE ALSO
ioctl(2), ioctl_tty(2), tcgetpgrp(3), tcsetpgrp(3), tcgetsid(3)