diff options
Diffstat (limited to 'debug')
| -rw-r--r-- | debug/Makefile | 13 | ||||
| -rw-r--r-- | debug/Versions | 7 | ||||
| -rw-r--r-- | debug/chk_fail.c | 2 | ||||
| -rw-r--r-- | debug/fgets_chk.c | 67 | ||||
| -rw-r--r-- | debug/fgets_u_chk.c | 65 | ||||
| -rw-r--r-- | debug/getcwd_chk.c | 31 | ||||
| -rw-r--r-- | debug/getwd_chk.c | 34 | ||||
| -rw-r--r-- | debug/pread64_chk.c | 33 | ||||
| -rw-r--r-- | debug/pread_chk.c | 33 | ||||
| -rw-r--r-- | debug/read_chk.c | 41 | ||||
| -rw-r--r-- | debug/readlink_chk.c | 41 | ||||
| -rw-r--r-- | debug/recv_chk.c | 33 | ||||
| -rw-r--r-- | debug/recvfrom_chk.c | 35 | ||||
| -rw-r--r-- | debug/tst-chk1.c | 81 |
14 files changed, 512 insertions, 4 deletions
diff --git a/debug/Makefile b/debug/Makefile index 6df0611..a3f20fd 100644 --- a/debug/Makefile +++ b/debug/Makefile @@ -1,4 +1,4 @@ -# Copyright (C) 1998, 1999, 2000, 2001, 2004 Free Software Foundation, Inc. +# Copyright (C) 1998,1999,2000,2001,2004,2005 Free Software Foundation, Inc. # This file is part of the GNU C Library. # The GNU C Library is free software; you can redistribute it and/or @@ -29,7 +29,9 @@ routines := backtrace backtracesyms backtracesymsfd noophooks \ strcat_chk strcpy_chk strncat_chk strncpy_chk \ sprintf_chk vsprintf_chk snprintf_chk vsnprintf_chk \ printf_chk fprintf_chk vprintf_chk vfprintf_chk \ - gets_chk chk_fail readonly-area + gets_chk chk_fail readonly-area fgets_chk fgets_u_chk \ + read_chk pread_chk pread64_chk recv_chk recvfrom_chk \ + readlink_chk getwd_chk getcwd_chk CFLAGS-backtrace.c = -fno-omit-frame-pointer CFLAGS-sprintf_chk.c = -D_IO_MTSAFE_IO @@ -41,6 +43,13 @@ CFLAGS-fprintf_chk.c = -D_IO_MTSAFE_IO $(exceptions) CFLAGS-vprintf_chk.c = -D_IO_MTSAFE_IO $(exceptions) CFLAGS-vfprintf_chk.c = -D_IO_MTSAFE_IO $(exceptions) CFLAGS-gets_chk.c = -D_IO_MTSAFE_IO $(exceptions) +CFLAGS-fgets_chk.c = -D_IO_MTSAFE_IO $(exceptions) +CFLAGS-fgets_u_chk.c = -D_IO_MTSAFE_IO $(exceptions) +CFLAGS-read_chk.c = -fexceptions -fasynchronous-unwind-tables +CFLAGS-pread_chk.c = -fexceptions -fasynchronous-unwind-tables +CFLAGS-pread64_chk.c = -fexceptions -fasynchronous-unwind-tables +CFLAGS-recv_chk.c = -fexceptions -fasynchronous-unwind-tables +CFLAGS-recvfrom_chk.c = -fexceptions -fasynchronous-unwind-tables tests = backtrace-tst tst-chk1 tst-chk2 tst-chk3 \ test-strcpy_chk test-stpcpy_chk diff --git a/debug/Versions b/debug/Versions index 07d6fbb..a4229d7 100644 --- a/debug/Versions +++ b/debug/Versions @@ -18,4 +18,11 @@ libc { __printf_chk; __fprintf_chk; __vprintf_chk; __vfprintf_chk; __gets_chk; } + GLIBC_2.4 { + __fgets_chk; __fgets_unlocked_chk; + __read_chk; __pread_chk; __pread64_chk; + __readlink_chk; __getcwd_chk; __getwd_chk; + __memset_zero_constant_len_parameter; + __recv_chk; __recvfrom_chk; + } } diff --git a/debug/chk_fail.c b/debug/chk_fail.c index 6921ca4..0cfca29 100644 --- a/debug/chk_fail.c +++ b/debug/chk_fail.c @@ -28,7 +28,7 @@ __chk_fail (void) { /* The loop is added only to keep gcc happy. */ while (1) - __libc_message (1, "*** buffer overflow detected ***: %s terminated\n", + __libc_message (2, "*** buffer overflow detected ***: %s terminated\n", __libc_argv[0] ?: "<unknown>"); } libc_hidden_def (__chk_fail) diff --git a/debug/fgets_chk.c b/debug/fgets_chk.c new file mode 100644 index 0000000..27fbede --- /dev/null +++ b/debug/fgets_chk.c @@ -0,0 +1,67 @@ +/* Copyright (C) 1993, 1995, 1996, 1997, 1998, 1999, 2002, 2003, 2005 + Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. + + As a special exception, if you link the code in this file with + files compiled with a GNU compiler to produce an executable, + that does not cause the resulting executable to be covered by + the GNU Lesser General Public License. This exception does not + however invalidate any other reasons why the executable file + might be covered by the GNU Lesser General Public License. + This exception applies to code released by its copyright holders + in files containing the exception. */ + +#include "libioP.h" +#include <stdio.h> +#include <sys/param.h> + +char * +__fgets_chk (buf, size, n, fp) + char *buf; + size_t size; + int n; + _IO_FILE *fp; +{ + _IO_size_t count; + char *result; + CHECK_FILE (fp, NULL); + if (n <= 0) + return NULL; + _IO_acquire_lock (fp); + /* This is very tricky since a file descriptor may be in the + non-blocking mode. The error flag doesn't mean much in this + case. We return an error only when there is a new error. */ + int old_error = fp->_IO_file_flags & _IO_ERR_SEEN; + fp->_IO_file_flags &= ~_IO_ERR_SEEN; + count = INTUSE(_IO_getline) (fp, buf, MIN ((size_t) n - 1, size), '\n', 1); + /* If we read in some bytes and errno is EAGAIN, that error will + be reported for next read. */ + if (count == 0 || ((fp->_IO_file_flags & _IO_ERR_SEEN) + && errno != EAGAIN)) + result = NULL; + else if (count >= size) + __chk_fail (); + else + { + buf[count] = '\0'; + result = buf; + } + fp->_IO_file_flags |= old_error; + _IO_release_lock (fp); + return result; +} diff --git a/debug/fgets_u_chk.c b/debug/fgets_u_chk.c new file mode 100644 index 0000000..324d7e3 --- /dev/null +++ b/debug/fgets_u_chk.c @@ -0,0 +1,65 @@ +/* Copyright (C) 1993, 1995, 1996, 1997, 1998, 1999, 2002, 2003, 2005 + Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. + + As a special exception, if you link the code in this file with + files compiled with a GNU compiler to produce an executable, + that does not cause the resulting executable to be covered by + the GNU Lesser General Public License. This exception does not + however invalidate any other reasons why the executable file + might be covered by the GNU Lesser General Public License. + This exception applies to code released by its copyright holders + in files containing the exception. */ + +#include "libioP.h" +#include <stdio.h> +#include <sys/param.h> + +char * +__fgets_unlocked_chk (buf, size, n, fp) + char *buf; + size_t size; + int n; + _IO_FILE *fp; +{ + _IO_size_t count; + char *result; + CHECK_FILE (fp, NULL); + if (n <= 0) + return NULL; + /* This is very tricky since a file descriptor may be in the + non-blocking mode. The error flag doesn't mean much in this + case. We return an error only when there is a new error. */ + int old_error = fp->_IO_file_flags & _IO_ERR_SEEN; + fp->_IO_file_flags &= ~_IO_ERR_SEEN; + count = INTUSE(_IO_getline) (fp, buf, MIN ((size_t) n - 1, size), '\n', 1); + /* If we read in some bytes and errno is EAGAIN, that error will + be reported for next read. */ + if (count == 0 || ((fp->_IO_file_flags & _IO_ERR_SEEN) + && errno != EAGAIN)) + result = NULL; + else if (count >= size) + __chk_fail (); + else + { + buf[count] = '\0'; + result = buf; + } + fp->_IO_file_flags |= old_error; + return result; +} diff --git a/debug/getcwd_chk.c b/debug/getcwd_chk.c new file mode 100644 index 0000000..9e14a01 --- /dev/null +++ b/debug/getcwd_chk.c @@ -0,0 +1,31 @@ +/* Copyright (C) 2005 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include <errno.h> +#include <unistd.h> +#include <sys/param.h> + + +char * +__getcwd_chk (char *buf, size_t size, size_t buflen) +{ + char *res = __getcwd (buf, MIN (size, buflen)); + if (res == NULL && errno == ERANGE && size > buflen) + __chk_fail (); + return res; +} diff --git a/debug/getwd_chk.c b/debug/getwd_chk.c new file mode 100644 index 0000000..898af28 --- /dev/null +++ b/debug/getwd_chk.c @@ -0,0 +1,34 @@ +/* Copyright (C) 2005 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include <errno.h> +#include <unistd.h> +#include <sys/param.h> + + +char * +__getwd_chk (char *buf, size_t buflen) +{ + char *res = __getcwd (buf, buflen); + if (res == NULL && errno == ERANGE) + __chk_fail (); + return res; +} + +link_warning (getwd, + "the `getwd' function is dangerous and should not be used.") diff --git a/debug/pread64_chk.c b/debug/pread64_chk.c new file mode 100644 index 0000000..5402e05 --- /dev/null +++ b/debug/pread64_chk.c @@ -0,0 +1,33 @@ +/* Copyright (C) 2005 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include <unistd.h> +#include <sys/param.h> + + +ssize_t +__pread64_chk (int fd, void *buf, size_t nbytes, off64_t offset, size_t buflen) +{ + /* In case NBYTES is greater than BUFLEN, we read BUFLEN+1 bytes. + This might overflow the buffer but the damage is reduced to just + one byte. And the program will terminate right away. */ + ssize_t n = __pread64 (fd, buf, offset, MIN (nbytes, buflen + 1)); + if (n > 0 && (size_t) n > buflen) + __chk_fail (); + return n; +} diff --git a/debug/pread_chk.c b/debug/pread_chk.c new file mode 100644 index 0000000..6dfa2ab --- /dev/null +++ b/debug/pread_chk.c @@ -0,0 +1,33 @@ +/* Copyright (C) 2005 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include <unistd.h> +#include <sys/param.h> + + +ssize_t +__pread_chk (int fd, void *buf, size_t nbytes, off_t offset, size_t buflen) +{ + /* In case NBYTES is greater than BUFLEN, we read BUFLEN+1 bytes. + This might overflow the buffer but the damage is reduced to just + one byte. And the program will terminate right away. */ + ssize_t n = __pread (fd, buf, offset, MIN (nbytes, buflen + 1)); + if (n > 0 && (size_t) n > buflen) + __chk_fail (); + return n; +} diff --git a/debug/read_chk.c b/debug/read_chk.c new file mode 100644 index 0000000..88404ed --- /dev/null +++ b/debug/read_chk.c @@ -0,0 +1,41 @@ +/* Copyright (C) 2005 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include <unistd.h> +#include <sys/param.h> +#ifdef HAVE_INLINED_SYSCALLS +# include <errno.h> +# include <sysdep.h> +#endif + + +ssize_t +__read_chk (int fd, void *buf, size_t nbytes, size_t buflen) +{ + /* In case NBYTES is greater than BUFLEN, we read BUFLEN+1 bytes. + This might overflow the buffer but the damage is reduced to just + one byte. And the program will terminate right away. */ +#ifdef HAVE_INLINED_SYSCALLS + ssize_t n = INLINE_SYSCALL (read, 3, fd, buf, MIN (nbytes, buflen + 1)); +#else + ssize_t n = __read (fd, buf, MIN (nbytes, buflen + 1)); +#endif + if (n > 0 && (size_t) n > buflen) + __chk_fail (); + return n; +} diff --git a/debug/readlink_chk.c b/debug/readlink_chk.c new file mode 100644 index 0000000..6620419 --- /dev/null +++ b/debug/readlink_chk.c @@ -0,0 +1,41 @@ +/* Copyright (C) 2005 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include <unistd.h> +#include <sys/param.h> +#ifdef HAVE_INLINED_SYSCALLS +# include <errno.h> +# include <sysdep.h> +#endif + + +ssize_t +__readlink_chk (const char *path, void *buf, size_t len, size_t buflen) +{ + /* In case LEN is greater than BUFLEN, we read BUFLEN+1 bytes. + This might overflow the buffer but the damage is reduced to just + one byte. And the program will terminate right away. */ +#ifdef HAVE_INLINED_SYSCALLS + int n = INLINE_SYSCALL (readlink, 3, path, buf, MIN (len, buflen + 1)); +#else + int n = __readlink (path, buf, MIN (len, buflen + 1)); +#endif + if (n > 0 && (size_t) n > buflen) + __chk_fail (); + return n; +} diff --git a/debug/recv_chk.c b/debug/recv_chk.c new file mode 100644 index 0000000..7a49d17 --- /dev/null +++ b/debug/recv_chk.c @@ -0,0 +1,33 @@ +/* Copyright (C) 2005 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include <sys/param.h> +#include <sys/socket.h> + + +ssize_t +__recv_chk (int fd, void *buf, size_t n, size_t buflen, int flags) +{ + /* In case N is greater than BUFLEN, we read BUFLEN+1 bytes. + This might overflow the buffer but the damage is reduced to just + one byte. And the program will terminate right away. */ + ssize_t nrecv = __recv (fd, buf, MIN (n, buflen + 1), flags); + if (nrecv > 0 && (size_t) nrecv > buflen) + __chk_fail (); + return nrecv; +} diff --git a/debug/recvfrom_chk.c b/debug/recvfrom_chk.c new file mode 100644 index 0000000..e1b1da7 --- /dev/null +++ b/debug/recvfrom_chk.c @@ -0,0 +1,35 @@ +/* Copyright (C) 2005 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include <sys/param.h> +#include <sys/socket.h> + + +ssize_t +__recvfrom_chk (int fd, void *buf, size_t n, size_t buflen, int flags, + __SOCKADDR_ARG addr, socklen_t *addr_len) +{ + /* In case N is greater than BUFLEN, we read BUFLEN+1 bytes. + This might overflow the buffer but the damage is reduced to just + one byte. And the program will terminate right away. */ + ssize_t nrecv = __recvfrom (fd, buf, MIN (n, buflen + 1), flags, + addr, addr_len); + if (nrecv > 0 && (size_t) nrecv > buflen) + __chk_fail (); + return nrecv; +} diff --git a/debug/tst-chk1.c b/debug/tst-chk1.c index 0df660d..3ed1cd9 100644 --- a/debug/tst-chk1.c +++ b/debug/tst-chk1.c @@ -1,4 +1,4 @@ -/* Copyright (C) 2004 Free Software Foundation, Inc. +/* Copyright (C) 2004, 2005 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Jakub Jelinek <jakub@redhat.com>, 2004. @@ -455,6 +455,85 @@ do_test (void) CHK_FAIL_END #endif + rewind (stdin); + + if (fgets (buf, sizeof (buf), stdin) != buf + || memcmp (buf, "abcdefgh\n", 10)) + FAIL (); + if (fgets (buf, sizeof (buf), stdin) != buf || memcmp (buf, "ABCDEFGHI", 10)) + FAIL (); + +#if __USE_FORTIFY_LEVEL >= 1 + CHK_FAIL_START + if (fgets (buf, sizeof (buf) + 1, stdin) != buf) + FAIL (); + CHK_FAIL_END +#endif + + rewind (stdin); + + if (fgets_unlocked (buf, sizeof (buf), stdin) != buf + || memcmp (buf, "abcdefgh\n", 10)) + FAIL (); + if (fgets_unlocked (buf, sizeof (buf), stdin) != buf + || memcmp (buf, "ABCDEFGHI", 10)) + FAIL (); + +#if __USE_FORTIFY_LEVEL >= 1 + CHK_FAIL_START + if (fgets_unlocked (buf, sizeof (buf) + 1, stdin) != buf) + FAIL (); + CHK_FAIL_END +#endif + + lseek (fileno (stdin), 0, SEEK_SET); + + if (read (fileno (stdin), buf, sizeof (buf) - 1) != sizeof (buf) - 1 + || memcmp (buf, "abcdefgh\n", 9)) + FAIL (); + if (read (fileno (stdin), buf, sizeof (buf) - 1) != sizeof (buf) - 1 + || memcmp (buf, "ABCDEFGHI", 9)) + FAIL (); + +#if __USE_FORTIFY_LEVEL >= 1 + CHK_FAIL_START + if (read (fileno (stdin), buf, sizeof (buf) + 1) != sizeof (buf) + 1) + FAIL (); + CHK_FAIL_END +#endif + + if (pread (fileno (stdin), buf, sizeof (buf) - 1, 0) != sizeof (buf) - 1 + || memcmp (buf, "abcdefgh\n", 9)) + FAIL (); + if (pread (fileno (stdin), buf, sizeof (buf) - 1, sizeof (buf) - 1) + != sizeof (buf) - 1 + || memcmp (buf, "ABCDEFGHI", 9)) + FAIL (); + +#if __USE_FORTIFY_LEVEL >= 1 + CHK_FAIL_START + if (pread (fileno (stdin), buf, sizeof (buf) + 1, 2 * sizeof (buf)) + != sizeof (buf) + 1) + FAIL (); + CHK_FAIL_END +#endif + + if (pread64 (fileno (stdin), buf, sizeof (buf) - 1, 0) != sizeof (buf) - 1 + || memcmp (buf, "abcdefgh\n", 9)) + FAIL (); + if (pread64 (fileno (stdin), buf, sizeof (buf) - 1, sizeof (buf) - 1) + != sizeof (buf) - 1 + || memcmp (buf, "ABCDEFGHI", 9)) + FAIL (); + +#if __USE_FORTIFY_LEVEL >= 1 + CHK_FAIL_START + if (pread64 (fileno (stdin), buf, sizeof (buf) + 1, 2 * (sizeof (buf) - 1)) + != sizeof (buf) + 1) + FAIL (); + CHK_FAIL_END +#endif + if (freopen (temp_filename, "r", stdin) == NULL) { puts ("could not open temporary file"); |