1/*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1998-2011 Dag-Erling Sm��rgrav
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
42FILE *
43fetchXGetFile(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
66FILE *
67fetchGetFile(struct url *u, const char *flags)
68{
69	return (fetchXGetFile(u, NULL, flags));
70}
71
72FILE *
73fetchPutFile(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
96static int
97fetch_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
113int
114fetchStatFile(struct url *u, struct url_stat *us, const char *flags __unused)
115{
116	return (fetch_stat_file(u->doc, us));
117}
118
119struct url_ent *
120fetchListFile(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