1 /* Copyright (C) 2005 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, write to the Free
16 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
20 #include <sys/param.h>
21 #ifdef HAVE_INLINED_SYSCALLS
28 __read_chk (int fd, void *buf, size_t nbytes, size_t buflen)
30 /* In case NBYTES is greater than BUFLEN, we read BUFLEN+1 bytes.
31 This might overflow the buffer but the damage is reduced to just
32 one byte. And the program will terminate right away. */
33 #ifdef HAVE_INLINED_SYSCALLS
34 ssize_t n = INLINE_SYSCALL (read, 3, fd, buf, MIN (nbytes, buflen + 1));
36 ssize_t n = __read (fd, buf, MIN (nbytes, buflen + 1));
38 if (n > 0 && (size_t) n > buflen)