101 lines
3.1 KiB
C
101 lines
3.1 KiB
C
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/* Basic fallocate test (no specific flags is checked).
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Copyright (C) 2016-2022 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <errno.h>
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#include <fcntl.h>
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#include <limits.h>
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#include <stdint.h>
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#include <string.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <support/support.h>
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#include <support/check.h>
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#include <support/temp_file.h>
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#define XSTR(s) STR(S)
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#define STR(s) #s
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static char *temp_filename;
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static int temp_fd;
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static void
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do_prepare (int argc, char **argv)
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{
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temp_fd = create_temp_file ("tst-fallocate.", &temp_filename);
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if (temp_fd == -1)
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FAIL_EXIT1 ("cannot create temporary file: %m");
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if (!support_descriptor_supports_holes (temp_fd))
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FAIL_UNSUPPORTED ("File %s does not support holes", temp_filename);
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}
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#define PREPARE do_prepare
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static int
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do_test_with_offset (off_t offset)
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{
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int ret;
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struct stat finfo;
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#define BLK_SIZE 1024
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char bwrite[BLK_SIZE] = { 0xf0 };
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char bread[BLK_SIZE];
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/* It tries to fallocate 1024 bytes from 'offset' and then write 1024 bytes.
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After both operation rewind the file descriptor and read 1024 bytes
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and check if both buffer have the same contents. */
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ret = fallocate (temp_fd, 0, offset, BLK_SIZE);
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if (ret == -1)
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{
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/* fallocate might not be fully supported by underlying filesystem (for
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instance some NFS versions). */
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if (errno == EOPNOTSUPP)
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FAIL_EXIT (77, "fallocate not supported");
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FAIL_EXIT1 ("fallocate failed");
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}
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ret = fstat (temp_fd, &finfo);
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if (ret == -1)
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FAIL_EXIT1 ("fstat failed");
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if (finfo.st_size < (offset + BLK_SIZE))
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FAIL_EXIT1 ("size of first fallocate less than expected (%llu)",
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(long long unsigned int)offset + BLK_SIZE);
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if (lseek (temp_fd, offset, SEEK_SET) == (off_t) -1)
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FAIL_EXIT1 ("fseek (0, SEEK_SET) failed");
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if (write (temp_fd, bwrite, BLK_SIZE) != BLK_SIZE)
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FAIL_EXIT1 ("fail trying to write " XSTR (BLK_SIZE) " bytes");
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if (lseek (temp_fd, offset, SEEK_SET) == (off_t) -1)
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FAIL_EXIT1 ("fseek (0, SEEK_SET) failed");
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if (read (temp_fd, bread, BLK_SIZE) != BLK_SIZE)
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FAIL_EXIT1 ("fail trying to read " XSTR (BLK_SIZE) " bytes");
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if (memcmp (bwrite, bread, BLK_SIZE) != 0)
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FAIL_EXIT1 ("buffer written different than buffer readed");
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return 0;
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}
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/* This function is defined by the individual tests. */
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static int do_test (void);
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#include <support/test-driver.c>
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