summaryrefslogtreecommitdiffstats
path: root/lib/libfetch/file.c
blob: ea7a0fdb671b943dcfdc595811422d8b4ee89fc6 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
/*-
 * Copyright (c) 1998-2004 Dag-Erling Coïdan Smørgrav
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer
 *    in this position and unchanged.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <sys/cdefs.h>

#include <sys/param.h>
#include <sys/stat.h>

#include <dirent.h>
#include <stdio.h>
#include <string.h>

#include "fetch.h"
#include "common.h"

FILE *
fetchXGetFile(struct url *u, struct url_stat *us, const char *flags)
{
	FILE *f;

	if (us && fetchStatFile(u, us, flags) == -1)
		return (NULL);

	f = fopen(u->doc, "r");

	if (f == NULL)
		_fetch_syserr();

	if (u->offset && fseeko(f, u->offset, SEEK_SET) == -1) {
		fclose(f);
		_fetch_syserr();
	}

	return (f);
}

FILE *
fetchGetFile(struct url *u, const char *flags)
{
	return (fetchXGetFile(u, NULL, flags));
}

FILE *
fetchPutFile(struct url *u, const char *flags)
{
	FILE *f;

	if (CHECK_FLAG('a'))
		f = fopen(u->doc, "a");
	else
		f = fopen(u->doc, "w+");

	if (f == NULL)
		_fetch_syserr();

	if (u->offset && fseeko(f, u->offset, SEEK_SET) == -1) {
		fclose(f);
		_fetch_syserr();
	}

	return (f);
}

static int
_fetch_stat_file(const char *fn, struct url_stat *us)
{
	struct stat sb;

	us->size = -1;
	us->atime = us->mtime = 0;
	if (stat(fn, &sb) == -1) {
		_fetch_syserr();
		return (-1);
	}
	us->size = sb.st_size;
	us->atime = sb.st_atime;
	us->mtime = sb.st_mtime;
	return (0);
}

int
fetchStatFile(struct url *u, struct url_stat *us, const char *flags)
{
	return (_fetch_stat_file(u->doc, us));
}

struct url_ent *
fetchListFile(struct url *u, const char *flags)
{
	struct dirent *de;
	struct url_stat us;
	struct url_ent *ue;
	int size, len;
	char fn[PATH_MAX], *p;
	DIR *dir;
	int l;

	if ((dir = opendir(u->doc)) == NULL) {
		_fetch_syserr();
		return (NULL);
	}

	ue = NULL;
	strncpy(fn, u->doc, sizeof(fn) - 2);
	fn[sizeof(fn) - 2] = 0;
	strcat(fn, "/");
	p = strchr(fn, 0);
	l = sizeof(fn) - strlen(fn) - 1;

	while ((de = readdir(dir)) != NULL) {
		strncpy(p, de->d_name, l - 1);
		p[l - 1] = 0;
		if (_fetch_stat_file(fn, &us) == -1)
			/* should I return a partial result, or abort? */
			break;
		_fetch_add_entry(&ue, &size, &len, de->d_name, &us);
	}

	return (ue);
}