file.c revision 60584 
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 * $FreeBSD: head/lib/libfetch/file.c 60584 2000-05-15 08:33:58Z des $
29 */
30
31#include <sys/param.h>
32#include <sys/stat.h>
33
34#include <dirent.h>
35#include <stdio.h>
36#include <string.h>
37
38#include "fetch.h"
39#include "common.h"
40
41FILE *
42fetchGetFile(struct url *u, char *flags)
43{
44    FILE *f;
45
46    f = fopen(u->doc, "r");
47
48    if (f == NULL)
49	_fetch_syserr();
50
51    if (u->offset && fseek(f, u->offset, SEEK_SET) == -1) {
52	fclose(f);
53	_fetch_syserr();
54    }
55
56    return f;
57}
58
59FILE *
60fetchPutFile(struct url *u, char *flags)
61{
62    FILE *f;
63
64    if (flags && strchr(flags, 'a'))
65	f = fopen(u->doc, "a");
66    else
67	f = fopen(u->doc, "w+");
68
69    if (f == NULL)
70	_fetch_syserr();
71
72    if (u->offset && fseek(f, u->offset, SEEK_SET) == -1) {
73	fclose(f);
74	_fetch_syserr();
75    }
76
77    return f;
78}
79
80static int
81_fetch_stat_file(char *fn, struct url_stat *us)
82{
83    struct stat sb;
84
85    us->size = -1;
86    us->atime = us->mtime = 0;
87    if (stat(fn, &sb) == -1) {
88	_fetch_syserr();
89	return -1;
90    }
91    us->size = sb.st_size;
92    us->atime = sb.st_atime;
93    us->mtime = sb.st_mtime;
94    return 0;
95}
96
97int
98fetchStatFile(struct url *u, struct url_stat *us, char *flags)
99{
100    return _fetch_stat_file(u->doc, us);
101}
102
103struct url_ent *
104fetchListFile(struct url *u, char *flags)
105{
106    DIR *dir;
107    struct dirent *de;
108    struct url_stat us;
109    struct url_ent *ue;
110    int size, len;
111    char fn[MAXPATHLEN], *p;
112    int l;
113
114    if ((dir = opendir(u->doc)) == NULL) {
115	_fetch_syserr();
116	return NULL;
117    }
118
119    ue = NULL;
120    strncpy(fn, u->doc, sizeof fn - 2);
121    fn[sizeof fn - 2] = 0;
122    strcat(fn, "/");
123    p = strchr(fn, 0);
124    l = sizeof fn - strlen(fn) - 1;
125
126    while ((de = readdir(dir)) != NULL) {
127	strncpy(p, de->d_name, l - 1);
128	p[l - 1] = 0;
129	if (_fetch_stat_file(fn, &us) == -1)
130	    /* should I return a partial result, or abort? */
131	    break;
132	_fetch_add_entry(&ue, &size, &len, de->d_name, &us);
133    }
134
135    return ue;
136}
137