1 /*-
2 * Copyright (c) 2007 Joerg Sonnenberger <joerg@NetBSD.org>.
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 *
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in
13 * the documentation and/or other materials provided with the
14 * distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
19 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
20 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
22 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
24 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
26 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30 #if HAVE_CONFIG_H
31 #include "config.h"
32 #endif
33
34 #include <nbcompat.h>
35
36 #if HAVE_SYS_STAT_H
37 #include <sys/stat.h>
38 #endif
39 #if HAVE_ERR_H
40 #include <err.h>
41 #endif
42 #include <fcntl.h>
43 #if HAVE_PWD_H
44 #include <grp.h>
45 #endif
46 #include <limits.h>
47 #if HAVE_PWD_H
48 #include <pwd.h>
49 #endif
50 #include <stdlib.h>
51 #include <string.h>
52 #include <time.h>
53 #include <unistd.h>
54
55 #include "lib.h"
56 #include "create.h"
57
58 static void
update_ids(struct memory_file * file)59 update_ids(struct memory_file *file)
60 {
61 const char *s;
62
63 if (file->owner != NULL) {
64 uid_t uid;
65
66 if (uid_from_user(file->owner, &uid) == -1)
67 errx(2, "user %s unknown", file->owner);
68 file->st.st_uid = uid;
69 } else {
70 if ((s = user_from_uid(file->st.st_uid, 1)) == NULL)
71 errx(2, "unknown user name for uid %u",
72 (unsigned) file->st.st_uid);
73 file->owner = xstrdup(s);
74 }
75
76 if (file->group != NULL) {
77 gid_t gid;
78
79 if (gid_from_group(file->group, &gid) == -1)
80 errx(2, "group %s unknown", file->group);
81 file->st.st_gid = gid;
82 } else {
83 if ((s = group_from_gid(file->st.st_gid, 1)) == NULL)
84 errx(2, "unknown group name for gid %u",
85 (unsigned) file->st.st_gid);
86 file->group = xstrdup(s);
87 }
88 }
89
90 struct memory_file *
make_memory_file(const char * archive_name,void * data,size_t len,const char * owner,const char * group,mode_t mode)91 make_memory_file(const char *archive_name, void *data, size_t len,
92 const char *owner, const char *group, mode_t mode)
93 {
94 struct memory_file *file;
95
96 file = xmalloc(sizeof(*file));
97 file->name = archive_name;
98 file->owner = (owner != NULL) ? xstrdup(owner) : NULL;
99 file->group = (group != NULL) ? xstrdup(group) : NULL;
100 file->data = data;
101 file->len = len;
102
103 memset(&file->st, 0, sizeof(file->st));
104
105 file->st.st_atime = file->st.st_ctime = file->st.st_mtime = time(NULL);
106
107 file->st.st_nlink = 1;
108 file->st.st_size = len;
109 file->st.st_mode = mode | S_IFREG;
110
111 update_ids(file);
112
113 return file;
114 }
115
116 struct memory_file *
load_memory_file(const char * disk_name,const char * archive_name,const char * owner,const char * group,mode_t mode)117 load_memory_file(const char *disk_name,
118 const char *archive_name, const char *owner, const char *group,
119 mode_t mode)
120 {
121 struct memory_file *file;
122 int fd;
123
124 file = xmalloc(sizeof(*file));
125 file->name = archive_name;
126 file->owner = (owner != NULL) ? xstrdup(owner) : NULL;
127 file->group = (group != NULL) ? xstrdup(group) : NULL;
128 file->mode = mode;
129
130 fd = open(disk_name, O_RDONLY);
131 if (fd == -1)
132 err(2, "cannot open file %s", disk_name);
133 if (fstat(fd, &file->st) == -1)
134 err(2, "cannot stat file %s", disk_name);
135
136 update_ids(file);
137
138 if ((file->st.st_mode & S_IFMT) != S_IFREG)
139 errx(1, "meta data file %s is not regular file", disk_name);
140 if (file->st.st_size > SSIZE_MAX)
141 errx(2, "meta data file too large: %s", disk_name);
142 file->data = xmalloc(file->st.st_size);
143
144 if (read(fd, file->data, file->st.st_size) != file->st.st_size)
145 err(2, "cannot read file into memory %s", disk_name);
146
147 file->len = file->st.st_size;
148
149 close(fd);
150
151 return file;
152 }
153
154 void
free_memory_file(struct memory_file * file)155 free_memory_file(struct memory_file *file)
156 {
157 if (file != NULL) {
158 free(__UNCONST(file->owner));
159 free(__UNCONST(file->group));
160 free(file->data);
161 free(file);
162 }
163 }
164