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Top Forums UNIX for Dummies Questions & Answers Difference between xargs and exec Post 74352 by vibhor_agarwali on Thursday 9th of June 2005 07:54:15 AM
Old 06-09-2005
Sorry,

I was referring to a different man page.

I got the name GNU in the man page.
 

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ISATTY(3)						     Linux Programmer's Manual							 ISATTY(3)

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 specifies the error ENOTTY for this case. ATTRIBUTES
For an explanation of the terms used in this section, see attributes(7). +----------+---------------+---------+ |Interface | Attribute | Value | +----------+---------------+---------+ |isatty() | Thread safety | MT-Safe | +----------+---------------+---------+ CONFORMING TO
POSIX.1-2001, POSIX.1-2008, SVr4, 4.3BSD. SEE ALSO
fstat(2), ttyname(3) COLOPHON
This page is part of release 4.15 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man-pages/. Linux 2015-08-08 ISATTY(3)
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