NAME
tcgetsid - get session ID SYNOPSIS
#define XOPENSOURCE 500 /* See featuretestmacros(7) */
#include
pidt tcgetsid(int fd); DESCRIPTION The function tcgetsid() returns the session ID of the current session that has the terminal associated to fd as controlling terminal. This terminal must be the controlling terminal of the calling process. RETURN VALUE When fd refers to the controlling terminal of our session, the function tcgetsid() will return the session ID of this session. Otherwise, -1 is returned, and errno is set appropriately. ERRORS EBADF fd is not a valid file descriptor. ENOTTY The calling process does not have a controlling terminal, or it has one but it is not described by fd. VERSIONS tcgetsid() is provided in glibc since version 2.1. ATTRIBUTES For an explanation of the terms used in this section, see attributes(7). ┌───────────┬───────────────┬─────────┐ │Interface │ Attribute │ Value │ ├───────────┼───────────────┼─────────┤
│tcgetsid() │ Thread safety │ MT-Safe │ └───────────┴───────────────┴─────────┘ CONFORMING TO
POSIX.1-2001. NOTES This function is implemented via the TIOCGSID ioctl(2), present since Linux 2.1.71. SEE ALSO getsid(2) COLOPHON
This page is part of release 3.53 of the Linux man-pages project. A description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/man-pages/.
GNU 2010-09-10 TCGETSID(3)