1160199Srwatson/*- 2160199Srwatson * Copyright (c) 2006 Robert N. M. Watson 3160199Srwatson * All rights reserved. 4160199Srwatson * 5160199Srwatson * Redistribution and use in source and binary forms, with or without 6160199Srwatson * modification, are permitted provided that the following conditions 7160199Srwatson * are met: 8160199Srwatson * 1. Redistributions of source code must retain the above copyright 9160199Srwatson * notice, this list of conditions and the following disclaimer. 10160199Srwatson * 2. Redistributions in binary form must reproduce the above copyright 11160199Srwatson * notice, this list of conditions and the following disclaimer in the 12160199Srwatson * documentation and/or other materials provided with the distribution. 13160199Srwatson * 14160199Srwatson * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15160199Srwatson * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16160199Srwatson * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17160199Srwatson * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18160199Srwatson * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19160199Srwatson * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20160199Srwatson * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21160199Srwatson * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22160199Srwatson * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23160199Srwatson * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24160199Srwatson * SUCH DAMAGE. 25160199Srwatson * 26160199Srwatson * $FreeBSD: stable/10/tests/sys/file/ftruncate_test.c 319301 2017-05-31 08:36:47Z ngie $ 27160199Srwatson */ 28160199Srwatson 29160199Srwatson/* 30160200Srwatson * Very simple regression test. 31160199Srwatson * 32160199Srwatson * Future tests that might be of interest: 33160199Srwatson * 34160199Srwatson * - Make sure we get EISDIR on a directory. 35160199Srwatson */ 36160199Srwatson 37160200Srwatson#include <sys/types.h> 38160200Srwatson#include <sys/event.h> 39160200Srwatson#include <sys/socket.h> 40160199Srwatson#include <sys/stat.h> 41160199Srwatson 42160199Srwatson#include <err.h> 43160199Srwatson#include <errno.h> 44160201Srwatson#include <fcntl.h> 45160201Srwatson#include <inttypes.h> 46160199Srwatson#include <limits.h> 47160199Srwatson#include <stdio.h> 48160199Srwatson#include <unistd.h> 49160199Srwatson 50160199Srwatson/* 51160201Srwatson * Select various potentially interesting lengths at and around power of 2 52160199Srwatson * edges. 53160199Srwatson */ 54160201Srwatsonstatic off_t lengths[] = {0, 1, 2, 3, 4, 127, 128, 129, 511, 512, 513, 1023, 55160199Srwatson 1024, 1025, 2047, 2048, 2049, 4095, 4096, 4097, 8191, 8192, 8193, 16383, 56160199Srwatson 16384, 16385}; 57160201Srwatsonstatic int lengths_count = sizeof(lengths) / sizeof(off_t); 58160199Srwatson 59160199Srwatsonint 60312323Sngiemain(void) 61160199Srwatson{ 62160201Srwatson int error, fd, fds[2], i, read_only_fd; 63319301Sngie char path[] = "ftruncate_file"; 64160199Srwatson struct stat sb; 65281432Sngie ssize_t size; 66160201Srwatson off_t len; 67160201Srwatson char ch; 68160199Srwatson 69160200Srwatson /* 70319301Sngie * Tests using a writable file: grow and then shrink a file 71160201Srwatson * using ftruncate and various lengths. Make sure that a negative 72160201Srwatson * file length is rejected. Make sure that when we grow the file, 73160201Srwatson * bytes now in the range of the file size return 0. 74160201Srwatson * 75160201Srwatson * Save a read-only reference to the file to use later for read-only 76160201Srwatson * descriptor tests. 77160200Srwatson */ 78319301Sngie fd = open(path, O_RDWR|O_CREAT, 0600); 79160199Srwatson if (fd < 0) 80319301Sngie err(1, "open(%s, O_RDWR|O_CREAT, 0600)", path); 81160201Srwatson read_only_fd = open(path, O_RDONLY); 82160201Srwatson if (read_only_fd < 0) { 83160201Srwatson error = errno; 84160201Srwatson (void)unlink(path); 85160201Srwatson errno = error; 86319301Sngie err(1, "open(%s, O_RDONLY)", path); 87160201Srwatson } 88160199Srwatson (void)unlink(path); 89160199Srwatson 90160199Srwatson if (ftruncate(fd, -1) == 0) 91319301Sngie errx(1, "ftruncate(fd, -1) succeeded unexpectedly"); 92160199Srwatson if (errno != EINVAL) 93319301Sngie err(1, "ftruncate(fd, -1) returned wrong error"); 94160199Srwatson 95160201Srwatson for (i = 0; i < lengths_count; i++) { 96160201Srwatson len = lengths[i]; 97160201Srwatson if (ftruncate(fd, len) < 0) 98319301Sngie err(1, "ftruncate(%jd) up", (intmax_t)len); 99160199Srwatson if (fstat(fd, &sb) < 0) 100319301Sngie err(1, "stat"); 101160201Srwatson if (sb.st_size != len) 102281432Sngie errx(-1, "fstat with len=%jd returned len %jd up", 103281432Sngie (intmax_t)len, (intmax_t)sb.st_size); 104160201Srwatson if (len != 0) { 105160201Srwatson size = pread(fd, &ch, sizeof(ch), len - 1); 106160201Srwatson if (size < 0) 107319301Sngie err(1, "pread on len %jd up", (intmax_t)len); 108160201Srwatson if (size != sizeof(ch)) 109281432Sngie errx(-1, "pread len %jd size %jd up", 110281432Sngie (intmax_t)len, (intmax_t)size); 111160201Srwatson if (ch != 0) 112160201Srwatson errx(-1, 113281432Sngie "pread length %jd size %jd ch %d up", 114281432Sngie (intmax_t)len, (intmax_t)size, ch); 115160201Srwatson } 116160199Srwatson } 117160199Srwatson 118160201Srwatson for (i = lengths_count - 1; i >= 0; i--) { 119160201Srwatson len = lengths[i]; 120160201Srwatson if (ftruncate(fd, len) < 0) 121319301Sngie err(1, "ftruncate(%jd) down", (intmax_t)len); 122160199Srwatson if (fstat(fd, &sb) < 0) 123319301Sngie err(1, "stat"); 124160201Srwatson if (sb.st_size != len) 125281432Sngie errx(-1, "fstat(%jd) returned %jd down", (intmax_t)len, 126160199Srwatson sb.st_size); 127160199Srwatson } 128160200Srwatson close(fd); 129160199Srwatson 130160200Srwatson /* 131160201Srwatson * Make sure that a read-only descriptor can't be truncated. 132160201Srwatson */ 133160201Srwatson if (ftruncate(read_only_fd, 0) == 0) 134160201Srwatson errx(-1, "ftruncate(read_only_fd) succeeded"); 135160201Srwatson if (errno != EINVAL) 136319301Sngie err(1, "ftruncate(read_only_fd) returned wrong error"); 137160201Srwatson close(read_only_fd); 138160201Srwatson 139160201Srwatson /* 140160200Srwatson * Make sure that ftruncate on sockets doesn't work. 141160200Srwatson */ 142160200Srwatson fd = socket(PF_UNIX, SOCK_STREAM, 0); 143160200Srwatson if (fd < 0) 144319301Sngie err(1, "socket(PF_UNIX, SOCK_STREAM, 0)"); 145160200Srwatson if (ftruncate(fd, 0) == 0) 146160200Srwatson errx(-1, "ftruncate(socket) succeeded"); 147160200Srwatson if (errno != EINVAL) 148319301Sngie err(1, "ftruncate(socket) returned wrong error"); 149160199Srwatson close(fd); 150160200Srwatson 151160200Srwatson /* 152160200Srwatson * Make sure that ftruncate on pipes doesn't work. 153160200Srwatson */ 154160200Srwatson if (pipe(fds) < 0) 155319301Sngie err(1, "pipe"); 156160200Srwatson if (ftruncate(fds[0], 0) == 0) 157160200Srwatson errx(-1, "ftruncate(pipe) succeeded"); 158160200Srwatson if (errno != EINVAL) 159319301Sngie err(1, "ftruncate(pipe) returned wrong error"); 160160200Srwatson close(fds[0]); 161160200Srwatson close(fds[1]); 162160200Srwatson 163160200Srwatson /* 164160200Srwatson * Make sure that ftruncate on kqueues doesn't work. 165160200Srwatson */ 166160200Srwatson fd = kqueue(); 167160200Srwatson if (fd < 0) 168319301Sngie err(1, "kqueue"); 169160200Srwatson if (ftruncate(fds[0], 0) == 0) 170160200Srwatson errx(-1, "ftruncate(kqueue) succeeded"); 171160200Srwatson if (errno != EINVAL) 172319301Sngie err(1, "ftruncate(kqueue) returned wrong error"); 173160200Srwatson close(fd); 174160200Srwatson 175160199Srwatson return (0); 176160199Srwatson} 177