projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 480adfa6 TL |
1 | .TH TTYNAME 3 |
| 2 | .SH NAME | |
| 3 | ttyname, isatty, ttyslot \- find name of a terminal | |
| 4 | .SH SYNOPSIS | |
| 5 | .B char *ttyname(fildes) | |
| 6 | .PP | |
| 7 | .B isatty(fildes) | |
| 8 | .PP | |
| 9 | .B ttyslot() | |
| 10 | .SH DESCRIPTION | |
| 11 | .I Ttyname | |
| 12 | returns a pointer to the null-terminated path name | |
| 13 | of the terminal device associated with file descriptor | |
| 14 | .IR fildes . | |
| 15 | .PP | |
| 16 | .I Isatty | |
| 17 | returns 1 if | |
| 18 | .I fildes | |
| 19 | is associated with a terminal device, 0 otherwise. | |
| 20 | .PP | |
| 21 | .I Ttyslot | |
| 22 | returns the number of the entry in the | |
| 23 | .IR ttys (5) | |
| 24 | file for the control terminal of the | |
| 25 | current process. | |
| 26 | .SH FILES | |
| 27 | /dev/* | |
| 28 | .br | |
| 29 | /etc/ttys | |
| 30 | .SH SEE ALSO | |
| 31 | ioctl(2), ttys(5) | |
| 32 | .SH DIAGNOSTICS | |
| 33 | .I Ttyname | |
| 34 | returns a null pointer (0) if | |
| 35 | .I fildes | |
| 36 | does not describe a terminal device in directory `/dev'. | |
| 37 | .PP | |
| 38 | .I Ttyslot | |
| 39 | returns 0 if `/etc/ttys' is inaccessible or if | |
| 40 | it cannot determine the control terminal. | |
| 41 | .SH BUGS | |
| 42 | The return value points to static data | |
| 43 | whose content is overwritten by each call. |