From 3d08cd331c1adcf0d917392f7e527b3f00511748 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Fri, 24 May 2024 06:52:22 +0200 Subject: Merging upstream version 6.8. Signed-off-by: Daniel Baumann --- man/man3/isatty.3 | 68 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 68 insertions(+) create mode 100644 man/man3/isatty.3 (limited to 'man/man3/isatty.3') diff --git a/man/man3/isatty.3 b/man/man3/isatty.3 new file mode 100644 index 0000000..99cb872 --- /dev/null +++ b/man/man3/isatty.3 @@ -0,0 +1,68 @@ +'\" t +.\" Copyright 2008, Linux Foundation, written by Michael Kerrisk +.\" +.\" +.\" SPDX-License-Identifier: Linux-man-pages-copyleft +.\" +.TH isatty 3 2024-05-02 "Linux man-pages (unreleased)" +.SH NAME +isatty \- test whether a file descriptor refers to a terminal +.SH LIBRARY +Standard C library +.RI ( libc ", " \-lc ) +.SH SYNOPSIS +.nf +.B #include +.P +.BI "int isatty(int " fd ); +.fi +.SH DESCRIPTION +The +.BR isatty () +function tests whether +.I fd +is an open file descriptor referring to a terminal. +.SH RETURN VALUE +.BR isatty () +returns 1 if +.I fd +is an open file descriptor referring to a terminal; +otherwise 0 is returned, and +.I errno +is set to indicate the error. +.SH ERRORS +.TP +.B EBADF +.I fd +is not a valid file descriptor. +.TP +.B ENOTTY +.I fd +refers to a file other than a terminal. +On some older kernels, some types of files +.\" e.g., FIFOs and pipes on 2.6.32 +resulted in the error +.B EINVAL +in this case (which is a violation of POSIX, which specifies the error +.BR ENOTTY ). +.SH ATTRIBUTES +For an explanation of the terms used in this section, see +.BR attributes (7). +.TS +allbox; +lbx lb lb +l l l. +Interface Attribute Value +T{ +.na +.nh +.BR isatty () +T} Thread safety MT-Safe +.TE +.SH STANDARDS +POSIX.1-2008. +.SH HISTORY +POSIX.1-2001, SVr4, 4.3BSD. +.SH SEE ALSO +.BR fstat (2), +.BR ttyname (3) -- cgit v1.2.3