1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1998-2011 Dag-Erling Smørgrav 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer 12 * in this position and unchanged. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. The name of the author may not be used to endorse or promote products 17 * derived from this software without specific prior written permission 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 * 30 * $FreeBSD: head/lib/libfetch/file.c 326219 2017-11-26 02:00:33Z pfg $ 31 */ 32 33 #include <sys/cdefs.h> 34 35 #include <sys/param.h> 36 #include <sys/stat.h> 37 38 #include <dirent.h> 39 #include <fcntl.h> 40 #include <stdio.h> 41 #include <string.h> 42 43 #include "fetch.h" 44 #include "common.h" 45 46 FILE * 47 fetchXGetFile(struct url *u, struct url_stat *us, const char *flags) 48 { 49 FILE *f; 50 51 if (us && fetchStatFile(u, us, flags) == -1) 52 return (NULL); 53 54 f = fopen(u->doc, "re"); 55 56 if (f == NULL) { 57 fetch_syserr(); 58 return (NULL); 59 } 60 61 if (u->offset && fseeko(f, u->offset, SEEK_SET) == -1) { 62 fclose(f); 63 fetch_syserr(); 64 return (NULL); 65 } 66 67 return (f); 68 } 69 70 FILE * 71 fetchGetFile(struct url *u, const char *flags) 72 { 73 return (fetchXGetFile(u, NULL, flags)); 74 } 75 76 FILE * 77 fetchPutFile(struct url *u, const char *flags) 78 { 79 FILE *f; 80 81 if (CHECK_FLAG('a')) 82 f = fopen(u->doc, "ae"); 83 else 84 f = fopen(u->doc, "w+e"); 85 86 if (f == NULL) { 87 fetch_syserr(); 88 return (NULL); 89 } 90 91 if (u->offset && fseeko(f, u->offset, SEEK_SET) == -1) { 92 fclose(f); 93 fetch_syserr(); 94 return (NULL); 95 } 96 97 return (f); 98 } 99 100 static int 101 fetch_stat_file(const char *fn, struct url_stat *us) 102 { 103 struct stat sb; 104 105 us->size = -1; 106 us->atime = us->mtime = 0; 107 if (stat(fn, &sb) == -1) { 108 fetch_syserr(); 109 return (-1); 110 } 111 us->size = sb.st_size; 112 us->atime = sb.st_atime; 113 us->mtime = sb.st_mtime; 114 return (0); 115 } 116 117 int 118 fetchStatFile(struct url *u, struct url_stat *us, const char *flags __unused) 119 { 120 return (fetch_stat_file(u->doc, us)); 121 } 122 123 struct url_ent * 124 fetchListFile(struct url *u, const char *flags __unused) 125 { 126 struct dirent *de; 127 struct url_stat us; 128 struct url_ent *ue; 129 int size, len; 130 char fn[PATH_MAX], *p; 131 DIR *dir; 132 int l; 133 134 if ((dir = opendir(u->doc)) == NULL) { 135 fetch_syserr(); 136 return (NULL); 137 } 138 139 ue = NULL; 140 strncpy(fn, u->doc, sizeof(fn) - 2); 141 fn[sizeof(fn) - 2] = 0; 142 strcat(fn, "/"); 143 p = strchr(fn, 0); 144 l = sizeof(fn) - strlen(fn) - 1; 145 146 while ((de = readdir(dir)) != NULL) { 147 strncpy(p, de->d_name, l - 1); 148 p[l - 1] = 0; 149 if (fetch_stat_file(fn, &us) == -1) 150 /* should I return a partial result, or abort? */ 151 break; 152 fetch_add_entry(&ue, &size, &len, de->d_name, &us); 153 } 154 155 closedir(dir); 156 return (ue); 157 } 158