Manual Pages  — TCGETSID

tcgetsid – get session ID associated with a controlling terminal

LIBRARY SYNOPSIS DESCRIPTION ERRORS SEE ALSO STANDARDS

Standard C Library (libc, -lc)

#include <termios.h>

pid_t
tcgetsid(int fd);

The tcgetsid() function returns the process group ID of the session leader for a controlling terminal specified by fd.

If an error occurs, tcgetsid() 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 tcgetsid() function conforms to -xpg4.2.