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isatty(3) | Library Functions Manual | isatty(3) |
NAME¶
isatty - test whether a file descriptor refers to a terminal
LIBRARY¶
Standard C library (libc, -lc)
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¶
ATTRIBUTES¶
For an explanation of the terms used in this section, see attributes(7).
Interface | Attribute | Value |
isatty () | Thread safety | MT-Safe |
STANDARDS¶
POSIX.1-2008.
HISTORY¶
POSIX.1-2001, SVr4, 4.3BSD.
SEE ALSO¶
2023-03-30 | Linux man-pages 6.04 |