file.c revision 294194
1/*- 2 * Copyright (c) 1998-2011 Dag-Erling Sm��rgrav 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer 10 * in this position and unchanged. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29#include <sys/cdefs.h> 30__FBSDID("$FreeBSD: stable/10/lib/libfetch/file.c 294194 2016-01-16 20:24:02Z des $"); 31 32#include <sys/param.h> 33#include <sys/stat.h> 34 35#include <dirent.h> 36#include <fcntl.h> 37#include <stdio.h> 38#include <string.h> 39 40#include "fetch.h" 41#include "common.h" 42 43FILE * 44fetchXGetFile(struct url *u, struct url_stat *us, const char *flags) 45{ 46 FILE *f; 47 48 if (us && fetchStatFile(u, us, flags) == -1) 49 return (NULL); 50 51 f = fopen(u->doc, "re"); 52 53 if (f == NULL) { 54 fetch_syserr(); 55 return (NULL); 56 } 57 58 if (u->offset && fseeko(f, u->offset, SEEK_SET) == -1) { 59 fclose(f); 60 fetch_syserr(); 61 return (NULL); 62 } 63 64 return (f); 65} 66 67FILE * 68fetchGetFile(struct url *u, const char *flags) 69{ 70 return (fetchXGetFile(u, NULL, flags)); 71} 72 73FILE * 74fetchPutFile(struct url *u, const char *flags) 75{ 76 FILE *f; 77 78 if (CHECK_FLAG('a')) 79 f = fopen(u->doc, "ae"); 80 else 81 f = fopen(u->doc, "w+e"); 82 83 if (f == NULL) { 84 fetch_syserr(); 85 return (NULL); 86 } 87 88 if (u->offset && fseeko(f, u->offset, SEEK_SET) == -1) { 89 fclose(f); 90 fetch_syserr(); 91 return (NULL); 92 } 93 94 return (f); 95} 96 97static int 98fetch_stat_file(const char *fn, struct url_stat *us) 99{ 100 struct stat sb; 101 102 us->size = -1; 103 us->atime = us->mtime = 0; 104 if (stat(fn, &sb) == -1) { 105 fetch_syserr(); 106 return (-1); 107 } 108 us->size = sb.st_size; 109 us->atime = sb.st_atime; 110 us->mtime = sb.st_mtime; 111 return (0); 112} 113 114int 115fetchStatFile(struct url *u, struct url_stat *us, const char *flags __unused) 116{ 117 return (fetch_stat_file(u->doc, us)); 118} 119 120struct url_ent * 121fetchListFile(struct url *u, const char *flags __unused) 122{ 123 struct dirent *de; 124 struct url_stat us; 125 struct url_ent *ue; 126 int size, len; 127 char fn[PATH_MAX], *p; 128 DIR *dir; 129 int l; 130 131 if ((dir = opendir(u->doc)) == NULL) { 132 fetch_syserr(); 133 return (NULL); 134 } 135 136 ue = NULL; 137 strncpy(fn, u->doc, sizeof(fn) - 2); 138 fn[sizeof(fn) - 2] = 0; 139 strcat(fn, "/"); 140 p = strchr(fn, 0); 141 l = sizeof(fn) - strlen(fn) - 1; 142 143 while ((de = readdir(dir)) != NULL) { 144 strncpy(p, de->d_name, l - 1); 145 p[l - 1] = 0; 146 if (fetch_stat_file(fn, &us) == -1) 147 /* should I return a partial result, or abort? */ 148 break; 149 fetch_add_entry(&ue, &size, &len, de->d_name, &us); 150 } 151 152 return (ue); 153} 154