1 /*- 2 * Copyright (c) 1998-2011 Dag-Erling Smørgrav 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 * $FreeBSD: head/lib/libfetch/file.c 240495 2012-09-14 12:15:13Z eadler $ 29 */ 30 31 #include <sys/param.h> 32 #include <sys/stat.h> 33 34 #include <dirent.h> 35 #include <fcntl.h> 36 #include <stdio.h> 37 #include <string.h> 38 39 #include "fetch.h" 40 #include "common.h" 41 42 FILE * 43 fetchXGetFile(struct url *u, struct url_stat *us, const char *flags) 44 { 45 FILE *f; 46 47 if (us && fetchStatFile(u, us, flags) == -1) 48 return (NULL); 49 50 f = fopen(u->doc, "r"); 51 52 if (f == NULL) { 53 fetch_syserr(); 54 return (NULL); 55 } 56 57 if (u->offset && fseeko(f, u->offset, SEEK_SET) == -1) { 58 fclose(f); 59 fetch_syserr(); 60 return (NULL); 61 } 62 63 fcntl(fileno(f), F_SETFD, FD_CLOEXEC); 64 return (f); 65 } 66 67 FILE * 68 fetchGetFile(struct url *u, const char *flags) 69 { 70 return (fetchXGetFile(u, NULL, flags)); 71 } 72 73 FILE * 74 fetchPutFile(struct url *u, const char *flags) 75 { 76 FILE *f; 77 78 if (CHECK_FLAG('a')) 79 f = fopen(u->doc, "a"); 80 else 81 f = fopen(u->doc, "w+"); 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 fcntl(fileno(f), F_SETFD, FD_CLOEXEC); 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 return (ue); 154 } 155