1TCGETSID(3)                Linux Programmer's Manual               TCGETSID(3)
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NAME

6       tcgetsid - get session ID
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SYNOPSIS

9       #define _XOPEN_SOURCE 500        /* See feature_test_macros(7) */
10       #include <termios.h>
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12       pid_t tcgetsid(int fd);
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DESCRIPTION

15       The  function  tcgetsid() returns the session ID of the current session
16       that has the terminal associated to fd as controlling  terminal.   This
17       terminal must be the controlling terminal of the calling process.
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RETURN VALUE

20       When fd refers to the controlling terminal of our session, the function
21       tcgetsid() will return the session ID of this session.   Otherwise,  -1
22       is returned, and errno is set appropriately.
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ERRORS

25       EBADF  fd is not a valid file descriptor.
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27       ENOTTY The  calling process does not have a controlling terminal, or it
28              has one but it is not described by fd.
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VERSIONS

31       tcgetsid() is provided in glibc since version 2.1.
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CONFORMING TO

34       POSIX.1-2001.
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NOTES

37       This function is implemented via the TIOCGSID ioctl(2),  present  since
38       Linux 2.1.71.
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SEE ALSO

41       getsid(2)
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COLOPHON

44       This  page  is  part of release 3.53 of the Linux man-pages project.  A
45       description of the project, and information about reporting  bugs,  can
46       be found at http://www.kernel.org/doc/man-pages/.
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50GNU                               2010-09-10                       TCGETSID(3)
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