file.c revision 225814 
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: head/lib/libfetch/file.c 225814 2011-09-27 18:57:26Z 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, "r");
52
53	if (f == NULL)
54		fetch_syserr();
55
56	if (u->offset && fseeko(f, u->offset, SEEK_SET) == -1) {
57		fclose(f);
58		fetch_syserr();
59	}
60
61	fcntl(fileno(f), F_SETFD, FD_CLOEXEC);
62	return (f);
63}
64
65FILE *
66fetchGetFile(struct url *u, const char *flags)
67{
68	return (fetchXGetFile(u, NULL, flags));
69}
70
71FILE *
72fetchPutFile(struct url *u, const char *flags)
73{
74	FILE *f;
75
76	if (CHECK_FLAG('a'))
77		f = fopen(u->doc, "a");
78	else
79		f = fopen(u->doc, "w+");
80
81	if (f == NULL)
82		fetch_syserr();
83
84	if (u->offset && fseeko(f, u->offset, SEEK_SET) == -1) {
85		fclose(f);
86		fetch_syserr();
87	}
88
89	fcntl(fileno(f), F_SETFD, FD_CLOEXEC);
90	return (f);
91}
92
93static int
94fetch_stat_file(const char *fn, struct url_stat *us)
95{
96	struct stat sb;
97
98	us->size = -1;
99	us->atime = us->mtime = 0;
100	if (stat(fn, &sb) == -1) {
101		fetch_syserr();
102		return (-1);
103	}
104	us->size = sb.st_size;
105	us->atime = sb.st_atime;
106	us->mtime = sb.st_mtime;
107	return (0);
108}
109
110int
111fetchStatFile(struct url *u, struct url_stat *us, const char *flags __unused)
112{
113	return (fetch_stat_file(u->doc, us));
114}
115
116struct url_ent *
117fetchListFile(struct url *u, const char *flags __unused)
118{
119	struct dirent *de;
120	struct url_stat us;
121	struct url_ent *ue;
122	int size, len;
123	char fn[PATH_MAX], *p;
124	DIR *dir;
125	int l;
126
127	if ((dir = opendir(u->doc)) == NULL) {
128		fetch_syserr();
129		return (NULL);
130	}
131
132	ue = NULL;
133	strncpy(fn, u->doc, sizeof(fn) - 2);
134	fn[sizeof(fn) - 2] = 0;
135	strcat(fn, "/");
136	p = strchr(fn, 0);
137	l = sizeof(fn) - strlen(fn) - 1;
138
139	while ((de = readdir(dir)) != NULL) {
140		strncpy(p, de->d_name, l - 1);
141		p[l - 1] = 0;
142		if (fetch_stat_file(fn, &us) == -1)
143			/* should I return a partial result, or abort? */
144			break;
145		fetch_add_entry(&ue, &size, &len, de->d_name, &us);
146	}
147
148	return (ue);
149}
150