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/param.h> 34 #include <sys/stat.h> 35 36 #include <dirent.h> 37 #include <fcntl.h> 38 #include <stdio.h> 39 #include <string.h> 40 41 #include "fetch.h" 42 #include "common.h" 43 44 FILE * 45 fetchXGetFile(struct url *u, struct url_stat *us, const char *flags) 46 { 47 FILE *f; 48 49 if (us && fetchStatFile(u, us, flags) == -1) 50 return (NULL); 51 52 f = fopen(u->doc, "re"); 53 54 if (f == NULL) { 55 fetch_syserr(); 56 return (NULL); 57 } 58 59 if (u->offset && fseeko(f, u->offset, SEEK_SET) == -1) { 60 fclose(f); 61 fetch_syserr(); 62 return (NULL); 63 } 64 65 return (f); 66 } 67 68 FILE * 69 fetchGetFile(struct url *u, const char *flags) 70 { 71 return (fetchXGetFile(u, NULL, flags)); 72 } 73 74 FILE * 75 fetchPutFile(struct url *u, const char *flags) 76 { 77 FILE *f; 78 79 if (CHECK_FLAG('a')) 80 f = fopen(u->doc, "ae"); 81 else 82 f = fopen(u->doc, "w+e"); 83 84 if (f == NULL) { 85 fetch_syserr(); 86 return (NULL); 87 } 88 89 if (u->offset && fseeko(f, u->offset, SEEK_SET) == -1) { 90 fclose(f); 91 fetch_syserr(); 92 return (NULL); 93 } 94 95 return (f); 96 } 97 98 static int 99 fetch_stat_file(const char *fn, struct url_stat *us) 100 { 101 struct stat sb; 102 103 us->size = -1; 104 us->atime = us->mtime = 0; 105 if (stat(fn, &sb) == -1) { 106 fetch_syserr(); 107 return (-1); 108 } 109 us->size = sb.st_size; 110 us->atime = sb.st_atime; 111 us->mtime = sb.st_mtime; 112 return (0); 113 } 114 115 int 116 fetchStatFile(struct url *u, struct url_stat *us, const char *flags __unused) 117 { 118 return (fetch_stat_file(u->doc, us)); 119 } 120 121 struct url_ent * 122 fetchListFile(struct url *u, const char *flags __unused) 123 { 124 struct dirent *de; 125 struct url_stat us; 126 struct url_ent *ue; 127 int size, len; 128 char fn[PATH_MAX], *p; 129 DIR *dir; 130 int l; 131 132 if ((dir = opendir(u->doc)) == NULL) { 133 fetch_syserr(); 134 return (NULL); 135 } 136 137 ue = NULL; 138 strncpy(fn, u->doc, sizeof(fn) - 2); 139 fn[sizeof(fn) - 2] = 0; 140 strcat(fn, "/"); 141 p = strchr(fn, 0); 142 l = sizeof(fn) - strlen(fn) - 1; 143 144 while ((de = readdir(dir)) != NULL) { 145 strncpy(p, de->d_name, l - 1); 146 p[l - 1] = 0; 147 if (fetch_stat_file(fn, &us) == -1) 148 /* should I return a partial result, or abort? */ 149 break; 150 fetch_add_entry(&ue, &size, &len, de->d_name, &us); 151 } 152 153 closedir(dir); 154 return (ue); 155 } 156