Annotated edit history of
tty(4) version 1, including all changes.
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perry |
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TTY |
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!!!TTY |
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NAME |
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DESCRIPTION |
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FILES |
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SEE ALSO |
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---- |
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!!NAME |
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tty - controlling terminal |
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!!DESCRIPTION |
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The file __/dev/tty__ is a character file with major |
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number 5 and minor number 0, usually of mode 0666 and |
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owner.group root.tty. It is a synonym for the controlling |
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terminal of a process, if any. |
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In addition to the __ioctl()__ requests supported by the |
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device that __tty__ refers to, the following |
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__ioctl()__ request is supported: |
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__TIOCNOTTY__ |
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Detach the current process from its controlling terminal, |
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and remove it from its current process group, without |
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attaching it to a new process group (that is, set its |
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process group ID to zero). This __ioctl()__ call only |
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works on file descriptors connected to __/dev/tty__; this |
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is used by daemon processes when they are invoked by a user |
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at a terminal. The process attempts to open __/dev/tty__; |
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if the open succeeds, it detaches itself from the terminal |
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by using __TIOCNOTTY__, while if the open fails, it is |
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obviously not attached to a terminal and does not need to |
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detach itself. |
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!!FILES |
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/dev/tty |
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!!SEE ALSO |
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mknod(1), chown(1), getty(1), |
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termios(2), console(4), |
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ttys(4) |
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---- |
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