Dr Andrew Scott G7VAV

My photo
 
March 2024
Mo Tu We Th Fr Sa Su
26 27 28 29 1 2 3
4 5 6 7 8 9 10
11 12 13 14 15 16 17
18 19 20 21 22 23 24
25 26 27 28 29 30 31
1 2 3 4 5 6 7


ISATTY

Section: Linux Programmer's Manual (3)
Updated: 2008-12-03
Index Return to Main Contents
 

NAME

isatty - test whether a file descriptor refers to a terminal  

SYNOPSIS

#include <unistd.h>

int isatty(int fd);
 

DESCRIPTION

The isatty() function tests whether fd is an open file descriptor referring to a terminal.  

RETURN VALUE

isatty() returns 1 if fd is an open file descriptor referring to a terminal; otherwise 0 is returned, and errno is set to indicate the error.  

ERRORS

EBADF
fd is not a valid file descriptor.
EINVAL
fd refers to a file other than a terminal. POSIX.1-2001 specifies the error ENOTTY for this case.
 

CONFORMING TO

SVr4, 4.3BSD, POSIX.1-2001.  

SEE ALSO

fstat(2), ttyname(3)  

COLOPHON

This page is part of release 3.35 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://man7.org/linux/man-pages/.


 

Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
ERRORS
CONFORMING TO
SEE ALSO
COLOPHON


for client 52.91.255.225
© Andrew Scott 2006 - 2024,
All Rights Reserved
http://www.andrew-scott.uk/
Andrew Scott
http://www.andrew-scott.co.uk/