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