file.c revision 84203 
1/*-
2 * Copyright (c) 1998 Dag-Erling Co�dan 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 84203 2001-09-30 21:36:09Z dillon $");
31
32#include <sys/param.h>
33#include <sys/stat.h>
34
35#include <dirent.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, "r");
51
52    if (f == NULL)
53	_fetch_syserr();
54
55    if (u->offset && fseeko(f, u->offset, SEEK_SET) == -1) {
56	fclose(f);
57	_fetch_syserr();
58    }
59
60    return f;
61}
62
63FILE *
64fetchGetFile(struct url *u, const char *flags)
65{
66    return fetchXGetFile(u, NULL, flags);
67}
68
69FILE *
70fetchPutFile(struct url *u, const char *flags)
71{
72    FILE *f;
73
74    if (CHECK_FLAG('a'))
75	f = fopen(u->doc, "a");
76    else
77	f = fopen(u->doc, "w+");
78
79    if (f == NULL)
80	_fetch_syserr();
81
82    if (u->offset && fseeko(f, u->offset, SEEK_SET) == -1) {
83	fclose(f);
84	_fetch_syserr();
85    }
86
87    return f;
88}
89
90static int
91_fetch_stat_file(const char *fn, struct url_stat *us)
92{
93    struct stat sb;
94
95    us->size = -1;
96    us->atime = us->mtime = 0;
97    if (stat(fn, &sb) == -1) {
98	_fetch_syserr();
99	return -1;
100    }
101    us->size = sb.st_size;
102    us->atime = sb.st_atime;
103    us->mtime = sb.st_mtime;
104    return 0;
105}
106
107int
108fetchStatFile(struct url *u, struct url_stat *us, const char *flags __unused)
109{
110    return _fetch_stat_file(u->doc, us);
111}
112
113struct url_ent *
114fetchListFile(struct url *u, const char *flags __unused)
115{
116    DIR *dir;
117    struct dirent *de;
118    struct url_stat us;
119    struct url_ent *ue;
120    int size, len;
121    char fn[PATH_MAX], *p;
122    int l;
123
124    if ((dir = opendir(u->doc)) == NULL) {
125	_fetch_syserr();
126	return NULL;
127    }
128
129    ue = NULL;
130    strncpy(fn, u->doc, sizeof fn - 2);
131    fn[sizeof fn - 2] = 0;
132    strcat(fn, "/");
133    p = strchr(fn, 0);
134    l = sizeof fn - strlen(fn) - 1;
135
136    while ((de = readdir(dir)) != NULL) {
137	strncpy(p, de->d_name, l - 1);
138	p[l - 1] = 0;
139	if (_fetch_stat_file(fn, &us) == -1)
140	    /* should I return a partial result, or abort? */
141	    break;
142	_fetch_add_entry(&ue, &size, &len, de->d_name, &us);
143    }
144
145    return ue;
146}
147