1 /* 2 * Copyright (C) 2014 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #include <fcntl.h> 18 #include <libgen.h> 19 #include <stdio.h> 20 #include <unistd.h> 21 #include <stdlib.h> 22 23 #if defined(__linux__) 24 #include <linux/fs.h> 25 #elif defined(__APPLE__) && defined(__MACH__) 26 #include <sys/disk.h> 27 #endif 28 29 #ifndef USE_MINGW /* O_BINARY is windows-specific flag */ 30 #define O_BINARY 0 31 #endif 32 33 static void usage(char *path) 34 { 35 fprintf(stderr, "%s -l <len>\n", basename(path)); 36 fprintf(stderr, " <filename>\n"); 37 } 38 39 int main(int argc, char **argv) 40 { 41 int opt; 42 const char *filename = NULL; 43 int fd; 44 int exitcode; 45 long long len; 46 while ((opt = getopt(argc, argv, "l:")) != -1) { 47 switch (opt) { 48 case 'l': 49 len = atoll(optarg); 50 break; 51 default: /* '?' */ 52 usage(argv[0]); 53 exit(EXIT_FAILURE); 54 } 55 } 56 57 58 if (optind >= argc) { 59 fprintf(stderr, "Expected filename after options\n"); 60 usage(argv[0]); 61 exit(EXIT_FAILURE); 62 } 63 64 filename = argv[optind++]; 65 66 if (optind < argc) { 67 fprintf(stderr, "Unexpected argument: %s\n", argv[optind]); 68 usage(argv[0]); 69 exit(EXIT_FAILURE); 70 } 71 72 if (strcmp(filename, "-")) { 73 fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0644); 74 if (fd < 0) { 75 perror("open"); 76 return EXIT_FAILURE; 77 } 78 } else { 79 fd = STDOUT_FILENO; 80 } 81 82 exitcode = make_f2fs_sparse_fd(fd, len, NULL, NULL); 83 84 close(fd); 85 if (exitcode && strcmp(filename, "-")) 86 unlink(filename); 87 return exitcode; 88 } 89
