xref: /freebsd/lib/libfetch/file.c (revision a220d00e74dd245b4fca59c5eca0c53963686325)
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("$FreeBSD$");
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 
42 FILE *
43 fetchXGetFile(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 
63 FILE *
64 fetchGetFile(struct url *u, const char *flags)
65 {
66     return fetchXGetFile(u, NULL, flags);
67 }
68 
69 FILE *
70 fetchPutFile(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 
90 static 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 
107 int
108 fetchStatFile(struct url *u, struct url_stat *us, const char *flags __unused)
109 {
110     return _fetch_stat_file(u->doc, us);
111 }
112 
113 struct url_ent *
114 fetchListFile(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