Mercurial > gnulib
view tests/test-truncate.c @ 40214:452ab00796c7
Fix undefined behaviour.
* lib/bitrotate.h (rotl16, rotr16, rotl8, rotr8): Case x to
'unsigned int', to avoid shift operations on 'int'.
* lib/xmemdup0.c (xmemdup0): Don't invoke memcpy with a zero size.
* tests/test-count-leading-zeros.c (main): Use a random number that has
as many bits as TYPE, not only 2*15 or 2*31 bits.
* tests/test-count-trailing-zeros.c (main): Likewise.
* tests/test-count-one-bits.c (main): Likewise.
* tests/test-memmem.c: Don't include "null-ptr.h".
(main): Use zerosize_ptr() instead of null_ptr().
* modules/memmem-tests (Files): Remove tests/null-ptr.h.
author | Bruno Haible <bruno@clisp.org> |
---|---|
date | Sat, 09 Mar 2019 20:32:25 +0100 |
parents | b06060465f09 |
children |
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/* Test truncating a file. Copyright (C) 2017-2019 Free Software Foundation, Inc. This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program 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 General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <https://www.gnu.org/licenses/>. */ #include <config.h> #include <unistd.h> #include "signature.h" SIGNATURE_CHECK (truncate, int, (const char *, off_t)); #include <errno.h> #include <fcntl.h> #include "ignore-value.h" #include "macros.h" #define BASE "test-truncate.t" int main (int argc, char *argv[]) { /* Clean up any trash from prior testsuite runs. */ ignore_value (system ("rm -rf " BASE "*")); { int fd = open (BASE "file", O_RDWR | O_TRUNC | O_CREAT, 0600); ASSERT (fd >= 0); ASSERT (write (fd, "Hello", 5) == 5); close (fd); } { int fd = open (BASE "file", O_RDONLY); ASSERT (fd >= 0); ASSERT (lseek (fd, 0, SEEK_END) == 5); close (fd); } /* Test increasing the size. */ ASSERT (truncate (BASE "file", 314159) == 0); { int fd = open (BASE "file", O_RDONLY); ASSERT (fd >= 0); ASSERT (lseek (fd, 0, SEEK_END) == 314159); close (fd); } /* Test reducing the size. */ ASSERT (truncate (BASE "file", 3) == 0); { int fd = open (BASE "file", O_RDONLY); ASSERT (fd >= 0); ASSERT (lseek (fd, 0, SEEK_END) == 3); close (fd); } /* Test reducing the size to 0. */ ASSERT (truncate (BASE "file", 0) == 0); { int fd = open (BASE "file", O_RDONLY); ASSERT (fd >= 0); ASSERT (lseek (fd, 0, SEEK_END) == 0); close (fd); } /* Test behaviour for nonexistent files. */ { errno = 0; ASSERT (truncate ("/nonexistent", 0) == -1); ASSERT (errno == ENOENT); } /* Test behaviour for directories. */ { errno = 0; ASSERT (truncate (".", 0) == -1); ASSERT (errno == EISDIR || /* on native Windows */ errno == EACCES); } /* Test behaviour for trailing slashes. */ { errno = 0; ASSERT (truncate (BASE "file/", 0) == -1); ASSERT (errno == ENOTDIR || /* on native Windows */ errno == EINVAL); } /* Test behaviour for invalid lengths. */ { errno = 0; ASSERT (truncate (BASE "file", -3) == -1); ASSERT (errno == EINVAL); } /* Cleanup. */ ASSERT (unlink (BASE "file") == 0); return 0; }