icon Top 9 categories map      RocketAware > man pages >


Tips: Browse or Search all pages for efficient awareness of more than 6000 of the most popular reusable and open source applications, functions, libraries, and FAQs.

The "RKT couplings" below include links to source code, updates, additional information, advice, FAQs, and overviews.


Search all pages


By activity
Professions, Sciences, Humanities, Business, ...

User Interface
Text-based, GUI, Audio, Video, Keyboards, Mouse, Images,...

Text Strings
Conversions, tests, processing, manipulation,...

Integer, Floating point, Matrix, Statistics, Boolean, ...

Algorithms, Memory, Process control, Debugging, ...

Stored Data
Data storage, Integrity, Encryption, Compression, ...

Networks, protocols, Interprocess, Remote, Client Server, ...

Hard World
Timing, Calendar and Clock, Audio, Video, Printer, Controls...

File System
Management, Filtering, File & Directory access, Viewers, ...


RocketLink!--> Man page versions: OpenBSD FreeBSD RedHat Solaris Others

[POSIX Threads Extension (1003.1c-1995)]

TTYNAME(3)                OpenBSD Programmer's Manual               TTYNAME(3)

     ttyname, ttyname_r, isatty, ttyslot - get name of associated terminal
     (tty) from file descriptor

     #include <unistd.h>

     char *
     ttyname(int fd);

     ttyname_r(int fd, char *name, size_t namesize);

     isatty(int fd);


     These functions operate on the system file descriptors for terminal type
     devices. These descriptors are not related to the standard I/O FILE type-
     def, but refer to the special device files found in /dev and named
     /dev/ttyXX and for which an entry exists in the initialization file
     /etc/ttys (see ttys(5)).

     The isatty() function determines if the file descriptor fd refers to a
     valid terminal type device.

     The ttyname() and ttyname_r() functions get the related device name of a
     file descriptor for which isatty() is true.  The ttyname_r() function
     stores the null-terminated pathname of the terminal associated with the
     file descriptor fd in the character array referenced by name. The array
     is namesize characters long and should have space for the name and the
     terminating NUL character. The maximum length of the terminal name is

     The ttyslot() function fetches the current process's control terminal
     number from the ttys(5) file entry.

     The ttyname() and ttyname_r() functions return the null-terminated name
     if the device is found and isatty() is true; otherwise a null pointer is
     returned and errno is set to indicate the error.

     The isatty() function returns 1 if fd is associated with a terminal de-
     vice; otherwise it returns 0 and errno is set to indicate the error.

     The ttyslot() function returns the unit number of the device file if
     found; otherwise the value zero is returned.

     The ttyname() and isatty() functions will fail if:

     [EBADF]       The fd argument is not a valid file descriptor.

     [ENOTTY]      The fd argument does not refer to a terminal device.

     [ERANGE]      The value of namesize is smaller than the length of the
                   string to be returned including the terminating NUL charac-



     ioctl(2),  ttys(5),  dev_mkdb(8)

     The isatty(), ttyname(), and ttyslot() functions appeared in Version 7
     AT&T UNIX.  The ttyname_r() function appeared in the POSIX Threads Exten-
     sion (1003.1c-1995).

     The ttyname() function leaves its result in an internal static object and
     returns a pointer to that object. Subsequent calls to ttyname() will mod-
     ify the same object.

OpenBSD 2.6                      June 4, 1993                                2

Source: OpenBSD 2.6 man pages. Copyright: Portions are copyrighted by BERKELEY
SOFTWARE DESIGN, INC., The Regents of the University of California, Massachusetts
Institute of Technology, Free Software Foundation, FreeBSD Inc., and others.

(Corrections, notes, and links courtesy of RocketAware.com)

[Detailed Topics]
FreeBSD Sources for ttyname(3) functions
OpenBSD sources for ttyname(3)

[Overview Topics]

Up to: Terminal I/O - low-level character based display (TTY) and keyboard routines.

RocketLink!--> Man page versions: OpenBSD FreeBSD RedHat Solaris Others

[POSIX Threads Extension (1003.1c-1995)]

Rapid-Links: Search | About | Comments | Submit Path: RocketAware > man pages > ttyname.3/
RocketAware.com is a service of Mib Software
Copyright 1999, Forrest J. Cavalier III. All Rights Reserved.
We welcome submissions and comments