1TTYNAME(3)                 Library Functions Manual                 TTYNAME(3)
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NAME

6       ttyname, isatty, ttyslot - find name of a terminal
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SYNOPSIS

9       char *ttyname(filedes)
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11       isatty(filedes)
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13       ttyslot()
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DESCRIPTION

16       Ttyname  returns a pointer to the null-terminated path name of the ter‐
17       minal device associated with file descriptor filedes (this is a  system
18       file  descriptor and has nothing to do with the standard I/O FILE type‐
19       def).
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21       Isatty returns 1 if filedes is associated with  a  terminal  device,  0
22       otherwise.
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24       Ttyslot  returns  the  number  of the entry in the ttys(5) file for the
25       control terminal of the current process.
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FILES

28       /dev/∗
29       /etc/ttys
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SEE ALSO

32       ioctl(2), ttys(5)
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DIAGNOSTICS

35       Ttyname returns a null pointer (0) if filedes does not describe a  ter‐
36       minal device in directory `/dev'.
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38       Ttyslot returns 0 if `/etc/ttys' is inaccessible or if it cannot deter‐
39       mine the control terminal.
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BUGS

42       The return value points to static data whose content is overwritten  by
43       each call.
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477th Edition                      May 15, 1985                       TTYNAME(3)