TCGETSID(3) Library Functions Manual TCGETSID(3) NAME tcgetsid -- get session ID associated with a controlling terminal LIBRARY Standard C Library (libc, -lc) SYNOPSIS #include <termios.h> pid_t tcgetsid(int fd); DESCRIPTION The tcgetsid() function returns the process group ID of the session leader for a controlling terminal specified by fd. ERRORS 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. SEE ALSO getsid(2), setsid(2), tcgetpgrp(3), tcsetsid(3) STANDARDS The tcgetsid() function conforms to X/Open Portability Guide Issue 4, Ver- sion 2 ("XPG4.2"). FreeBSD 15.1 November 28, 2022 TCGETSID(3)
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