diff options
Diffstat (limited to 'sys/contrib/openzfs/tests/zfs-tests/cmd/file/largest_file.c')
-rw-r--r-- | sys/contrib/openzfs/tests/zfs-tests/cmd/file/largest_file.c | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/sys/contrib/openzfs/tests/zfs-tests/cmd/file/largest_file.c b/sys/contrib/openzfs/tests/zfs-tests/cmd/file/largest_file.c new file mode 100644 index 000000000000..5acb5f1db87d --- /dev/null +++ b/sys/contrib/openzfs/tests/zfs-tests/cmd/file/largest_file.c @@ -0,0 +1,145 @@ +/* + * CDDL HEADER START + * + * The contents of this file are subject to the terms of the + * Common Development and Distribution License (the "License"). + * You may not use this file except in compliance with the License. + * + * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE + * or http://www.opensolaris.org/os/licensing. + * See the License for the specific language governing permissions + * and limitations under the License. + * + * When distributing Covered Code, include this CDDL HEADER in each + * file and include the License file at usr/src/OPENSOLARIS.LICENSE. + * If applicable, add the following below this CDDL HEADER, with the + * fields enclosed by brackets "[]" replaced with your own identifying + * information: Portions Copyright [yyyy] [name of copyright owner] + * + * CDDL HEADER END + */ + +/* + * Copyright 2007 Sun Microsystems, Inc. All rights reserved. + * Use is subject to license terms. + */ + +/* + * Copyright (c) 2012 by Delphix. All rights reserved. + */ + +#include "file_common.h" +#include <sys/param.h> +#include <signal.h> +#include <stdio.h> +#include <string.h> +#include <sys/stdtypes.h> +#include <unistd.h> + +/* + * -------------------------------------------------------------- + * + * Assertion: + * The last byte of the largest file size can be + * accessed without any errors. Also, the writing + * beyond the last byte of the largest file size + * will produce an errno of EFBIG. + * + * -------------------------------------------------------------- + * If the write() system call below returns a "1", + * then the last byte can be accessed. + * -------------------------------------------------------------- + */ +static void sigxfsz(int); +static void usage(char *); + +int +main(int argc, char **argv) +{ + int fd = 0; + offset_t offset = (MAXOFFSET_T - 1); + offset_t llseek_ret = 0; + int write_ret = 0; + int err = 0; + char mybuf[5] = "aaaa\0"; + char *testfile; + mode_t mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH; + struct sigaction sa; + + if (argc != 2) { + usage(argv[0]); + } + + if (sigemptyset(&sa.sa_mask) == -1) + return (errno); + sa.sa_flags = 0; + sa.sa_handler = sigxfsz; + if (sigaction(SIGXFSZ, &sa, NULL) == -1) + return (errno); + + testfile = strdup(argv[1]); + + fd = open(testfile, O_CREAT | O_RDWR, mode); + if (fd < 0) { + err = errno; + perror("Failed to create testfile"); + free(testfile); + return (err); + } + + llseek_ret = lseek64(fd, offset, SEEK_SET); + if (llseek_ret < 0) { + err = errno; + perror("Failed to seek to end of testfile"); + goto out; + } + + write_ret = write(fd, mybuf, 1); + if (write_ret < 0) { + err = errno; + perror("Failed to write to end of file"); + goto out; + } + + offset = 0; + llseek_ret = lseek64(fd, offset, SEEK_CUR); + if (llseek_ret < 0) { + err = errno; + perror("Failed to seek to end of file"); + goto out; + } + + write_ret = write(fd, mybuf, 1); + if (write_ret < 0) { + if (errno == EFBIG || errno == EINVAL) { + (void) printf("write errno=EFBIG|EINVAL: success\n"); + err = 0; + } else { + err = errno; + perror("Did not receive EFBIG"); + } + } else { + (void) printf("write completed successfully, test failed\n"); + err = 1; + } + +out: + (void) unlink(testfile); + free(testfile); + close(fd); + return (err); +} + +static void +usage(char *name) +{ + (void) printf("%s <testfile>\n", name); + exit(1); +} + +static void +sigxfsz(int signo) +{ + (void) signo; + (void) printf("\nlargest_file: sigxfsz() caught SIGXFSZ\n"); +} |