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expect-read1.c
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1 /* Copyright (C) 2013-2015 Free Software Foundation, Inc.
2 
3  This file is part of GDB.
4 
5  This program is free software; you can redistribute it and/or modify
6  it under the terms of the GNU General Public License as published by
7  the Free Software Foundation; either version 3 of the License, or
8  (at your option) any later version.
9 
10  This program is distributed in the hope that it will be useful,
11  but WITHOUT ANY WARRANTY; without even the implied warranty of
12  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13  GNU General Public License for more details.
14 
15  You should have received a copy of the GNU General Public License
16  along with this program. If not, see <http://www.gnu.org/licenses/>. */
17 
18 /* RTLD_NEXT requires _GNU_SOURCE. */
19 #define _GNU_SOURCE 1
20 #include <dlfcn.h>
21 #include <unistd.h>
22 #include <fcntl.h>
23 #include <stdlib.h>
24 
25 ssize_t
26 read (int fd, void *buf, size_t count)
27 {
28  static ssize_t (*read2) (int fd, void *buf, size_t count) = NULL;
29 
30  if (read2 == NULL)
31  {
32  unsetenv ("LD_PRELOAD");
33  read2 = dlsym (RTLD_NEXT, "read");
34  }
35 
36  if (count > 1 && isatty (fd) == 1)
37  count = 1;
38 
39  return read2 (fd, buf, count);
40 }
ssize_t read(int fd, void *buf, size_t count)
Definition: expect-read1.c:26