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isatty.c (1574) isatty.c (13545)
1/*
2 * Copyright (c) 1988, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright

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32 */
33
34#if defined(LIBC_SCCS) && !defined(lint)
35static char sccsid[] = "@(#)isatty.c 8.1 (Berkeley) 6/4/93";
36#endif /* LIBC_SCCS and not lint */
37
38#include <termios.h>
39#include <unistd.h>
1/*
2 * Copyright (c) 1988, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright

--- 23 unchanged lines hidden (view full) ---

32 */
33
34#if defined(LIBC_SCCS) && !defined(lint)
35static char sccsid[] = "@(#)isatty.c 8.1 (Berkeley) 6/4/93";
36#endif /* LIBC_SCCS and not lint */
37
38#include <termios.h>
39#include <unistd.h>
40#ifdef _THREAD_SAFE
41#include <pthread.h>
42#include "pthread_private.h"
43#endif
40
41int
42isatty(fd)
43 int fd;
44{
44
45int
46isatty(fd)
47 int fd;
48{
49 int retval;
45 struct termios t;
46
50 struct termios t;
51
47 return(tcgetattr(fd, &t) != -1);
52#ifdef _THREAD_SAFE
53 if (_thread_fd_lock(fd, FD_READ, NULL,__FILE__,__LINE__) == 0) {
54#endif
55 retval = (tcgetattr(fd, &t) != -1);
56#ifdef _THREAD_SAFE
57 _thread_fd_unlock(fd, FD_READ);
58 } else {
59 retval = 0;
60 }
61#endif
62 return(retval);
48}
63}