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/cdefs.h>
32__FBSDID("$FreeBSD$");
33
34#include <sys/param.h>
35#include <sys/stat.h>
36
37#include <dirent.h>
38#include <fcntl.h>
39#include <stdio.h>
40#include <string.h>
41
42#include "fetch.h"
43#include "common.h"
44
45FILE *
46fetchXGetFile(struct url *u, struct url_stat *us, const char *flags)
47{
48	FILE *f;
49
50	if (us && fetchStatFile(u, us, flags) == -1)
51		return (NULL);
52
53	f = fopen(u->doc, "re");
54
55	if (f == NULL) {
56		fetch_syserr();
57		return (NULL);
58	}
59
60	if (u->offset && fseeko(f, u->offset, SEEK_SET) == -1) {
61		fclose(f);
62		fetch_syserr();
63		return (NULL);
64	}
65
66	return (f);
67}
68
69FILE *
70fetchGetFile(struct url *u, const char *flags)
71{
72	return (fetchXGetFile(u, NULL, flags));
73}
74
75FILE *
76fetchPutFile(struct url *u, const char *flags)
77{
78	FILE *f;
79
80	if (CHECK_FLAG('a'))
81		f = fopen(u->doc, "ae");
82	else
83		f = fopen(u->doc, "w+e");
84
85	if (f == NULL) {
86		fetch_syserr();
87		return (NULL);
88	}
89
90	if (u->offset && fseeko(f, u->offset, SEEK_SET) == -1) {
91		fclose(f);
92		fetch_syserr();
93		return (NULL);
94	}
95
96	return (f);
97}
98
99static int
100fetch_stat_file(const char *fn, struct url_stat *us)
101{
102	struct stat sb;
103
104	us->size = -1;
105	us->atime = us->mtime = 0;
106	if (stat(fn, &sb) == -1) {
107		fetch_syserr();
108		return (-1);
109	}
110	us->size = sb.st_size;
111	us->atime = sb.st_atime;
112	us->mtime = sb.st_mtime;
113	return (0);
114}
115
116int
117fetchStatFile(struct url *u, struct url_stat *us, const char *flags __unused)
118{
119	return (fetch_stat_file(u->doc, us));
120}
121
122struct url_ent *
123fetchListFile(struct url *u, const char *flags __unused)
124{
125	struct dirent *de;
126	struct url_stat us;
127	struct url_ent *ue;
128	int size, len;
129	char fn[PATH_MAX], *p;
130	DIR *dir;
131	int l;
132
133	if ((dir = opendir(u->doc)) == NULL) {
134		fetch_syserr();
135		return (NULL);
136	}
137
138	ue = NULL;
139	strncpy(fn, u->doc, sizeof(fn) - 2);
140	fn[sizeof(fn) - 2] = 0;
141	strcat(fn, "/");
142	p = strchr(fn, 0);
143	l = sizeof(fn) - strlen(fn) - 1;
144
145	while ((de = readdir(dir)) != NULL) {
146		strncpy(p, de->d_name, l - 1);
147		p[l - 1] = 0;
148		if (fetch_stat_file(fn, &us) == -1)
149			/* should I return a partial result, or abort? */
150			break;
151		fetch_add_entry(&ue, &size, &len, de->d_name, &us);
152	}
153
154	closedir(dir);
155	return (ue);
156}
157