Visit Our UNIX and Linux User Community

Linux and UNIX Man Pages

Test Your Knowledge in Computers #179
Difficulty: Easy
The Apple I first went on sale in July 1976 and sold for $666 USD.
True or False?
Linux & Unix Commands - Search Man Pages

ttyslot(3) [bsd man page]

TTYNAME(3)						     Library Functions Manual							TTYNAME(3)

NAME
ttyname, isatty, ttyslot - find name of a terminal SYNOPSIS
char *ttyname(filedes) isatty(filedes) ttyslot() DESCRIPTION
Ttyname returns a pointer to the null-terminated path name of the terminal device associated with file descriptor filedes (this is a system file descriptor and has nothing to do with the standard I/O FILE typedef). Isatty returns 1 if filedes is associated with a terminal device, 0 otherwise. Ttyslot returns the number of the entry in the ttys(5) file for the control terminal of the current process. FILES
/dev/* /etc/ttys SEE ALSO
ioctl(2), ttys(5) DIAGNOSTICS
Ttyname returns a null pointer (0) if filedes does not describe a terminal device in directory `/dev'. Ttyslot returns 0 if `/etc/ttys' is inaccessible or if it cannot determine the control terminal. BUGS
The return value points to static data whose content is overwritten by each call. 7th Edition May 15, 1985 TTYNAME(3)

Check Out this Related Man Page

TTYNAME(3)						   BSD Library Functions Manual 						TTYNAME(3)

NAME
isatty, ttyname, ttyslot -- get name of associated terminal (tty) from file descriptor LIBRARY
Standard C Library (libc, -lc) SYNOPSIS
#include <unistd.h> int isatty(int fildes); char * ttyname(int fildes); int ttyslot(void); DESCRIPTION
These functions operate on the system file descriptors for terminal type devices. These descriptors are not related to the standard I/O FILE typedef, 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 fildes refers to a valid terminal type device. The ttyname() function gets the related device name of a file descriptor for which isatty() is true. The ttyslot() function fetches the current process' control terminal number from the ttys(5) file entry. RETURN VALUES
The ttyname() function returns the null terminated name if the device is found and isatty() is true; otherwise, a NULL pointer is returned. The ttyslot() function returns the unit number of the device file if found; otherwise, the value zero is returned. FILES
/dev/* /etc/ttys SEE ALSO
ioctl(2), ttys(5) HISTORY
A isatty(), ttyname(), and ttyslot() function appeared in Version 7 AT&T UNIX. BUGS
The ttyname() function leaves its result in an internal static object and returns a pointer to that object. Subsequent calls to ttyname() will modify the same object. BSD
June 4, 1993 BSD

10 More Discussions You Might Find Interesting

1. OS X (Apple)

Mac OS X: Based on UNIX - Solid As a Rock

See this threads: Page Not Found - Apple Open Source - Apple (0 Replies)
Discussion started by: Neo
0 Replies

2. UNIX for Beginners Questions & Answers

Simple rules of the UNIX.COM forums:

RULES OF THE UNIX AND LINUX FORUMS For the latest version of the community rules (the official community rules page), please visit here. No flames, shouting (all caps), sarcasm, bullying, profanity or arrogant posts. No negative comments about others or impolite remarks. Be patient. No... (1 Reply)
Discussion started by: Neo
1 Replies

3. Shell Programming and Scripting

Scripts without shebang

I see lot of ad-hoc shell scripts in our servers which don't have a shebang at the beginning . Does this mean that it will run on any shell ? Is it a good practice to create scripts (even ad-hoc ones) without shebang ? (16 Replies)
Discussion started by: kraljic
16 Replies

4. Fedora

Is UNIX an open source OS ?

Hi everyone, I know the following questions are noobish questions but I am asking them because I am confused about the basics of history behind UNIX and LINUX. Ok onto business, my questions are-: Was/Is UNIX ever an open source operating system ? If UNIX was... (21 Replies)
Discussion started by: sreyan32
21 Replies

5. UNIX for Beginners Questions & Answers

Memory leak with awk on MacOs

Dear all, I use awk quite a bit for data wrangling ... today I find weird behavior that I cannot wrap my head around. if I execute the following command (simplified to illustrate the behavior ... nothing to do with the real command) bash-3.2$ awk... (3 Replies)
Discussion started by: comm|getline
3 Replies

6. Shell Programming and Scripting

Mail/mailx ignores newline formatting Problem.

I have a file hello.txt which i wish to send as a email body (not attachment). cat -ev hello.txt 1$ 2$ 3$ I use the following command to send the hello.txt as the email body. mailx -s "Alert" myteam@mycomp.com<hello.txt However, the email received has this in the email body 123... (2 Replies)
Discussion started by: mohtashims
2 Replies

7. Linux

LM 19.1 from pendrive

I've "installed" LM 19.1 to a PNY 16Gb(2.0) pendrive. I have a few issues that I'd like to resolve. First and foremost, the O.S. experiences "lagging" issues and to a lesser degree, freezing. Example: Complete "boot-up" (from start to complete "home" page) can take upwards of 7 mins. Then when... (10 Replies)
Discussion started by: 69Rixter
10 Replies

8. UNIX for Beginners Questions & Answers

UNIX Environment Setup - (Just starting!)

Morning All So, I am starting looking into the world of UNIX for a new job (luckily not my primary function!) and I am looking to get stared. Like anything I seem to learn best by trying things out first in an environment but I have a key question: Currently I use Oracle VirtualBox, can... (8 Replies)
Discussion started by: GophusMeau
8 Replies

9. Solaris

Is it safe to install x86 Solaris 10 U6 after installed-Linux-and-FreeBSD?

I've installed Slack 14.2 on /dev/sda1 (/dev/sda2 is swap) and FreeBSD 12 on /dev/sda3 and lilo is the boot manager. FreeBSD slices are as follows; / on /dev/ada0S3a, swap on /dev/ada0s3e, /var on /dev/ada0s3b, /tmp on /dev/ada0s3d and /usr on /dev/ada0s3f. I hesitate to install Solaris 10... (2 Replies)
Discussion started by: vectrum
2 Replies

10. UNIX for Advanced & Expert Users

[Tip] How to display the number of logged-in users

In a professional environment with traditional application you often want (or are asked) to report the users. Traditionally there is the who command who | awk '{print $1}'telnetd or sshd register the users in the utmp file, to be shown with who, w, users, finger, pinky, ... In addition they... (1 Reply)
Discussion started by: MadeInGermany
1 Replies

Featured Tech Videos