1 /* $OpenBSD: sftp-common.c,v 1.26 2014/01/09 03:26:00 guenther Exp $ */
2 /*
3 * Copyright (c) 2001 Markus Friedl. All rights reserved.
4 * Copyright (c) 2001 Damien Miller. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
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 the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27 #include "includes.h"
28 __RCSID("$FreeBSD$");
29
30 #include <sys/types.h>
31 #include <sys/stat.h>
32 #include <sys/param.h>
33
34 #include <grp.h>
35 #include <pwd.h>
36 #include <stdio.h>
37 #include <stdlib.h>
38 #include <string.h>
39 #include <time.h>
40 #include <stdarg.h>
41 #ifdef HAVE_UTIL_H
42 #include <util.h>
43 #endif
44
45 #include "xmalloc.h"
46 #include "buffer.h"
47 #include "log.h"
48
49 #include "sftp.h"
50 #include "sftp-common.h"
51
52 /* Clear contents of attributes structure */
53 void
attrib_clear(Attrib * a)54 attrib_clear(Attrib *a)
55 {
56 a->flags = 0;
57 a->size = 0;
58 a->uid = 0;
59 a->gid = 0;
60 a->perm = 0;
61 a->atime = 0;
62 a->mtime = 0;
63 }
64
65 /* Convert from struct stat to filexfer attribs */
66 void
stat_to_attrib(const struct stat * st,Attrib * a)67 stat_to_attrib(const struct stat *st, Attrib *a)
68 {
69 attrib_clear(a);
70 a->flags = 0;
71 a->flags |= SSH2_FILEXFER_ATTR_SIZE;
72 a->size = st->st_size;
73 a->flags |= SSH2_FILEXFER_ATTR_UIDGID;
74 a->uid = st->st_uid;
75 a->gid = st->st_gid;
76 a->flags |= SSH2_FILEXFER_ATTR_PERMISSIONS;
77 a->perm = st->st_mode;
78 a->flags |= SSH2_FILEXFER_ATTR_ACMODTIME;
79 a->atime = st->st_atime;
80 a->mtime = st->st_mtime;
81 }
82
83 /* Convert from filexfer attribs to struct stat */
84 void
attrib_to_stat(const Attrib * a,struct stat * st)85 attrib_to_stat(const Attrib *a, struct stat *st)
86 {
87 memset(st, 0, sizeof(*st));
88
89 if (a->flags & SSH2_FILEXFER_ATTR_SIZE)
90 st->st_size = a->size;
91 if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) {
92 st->st_uid = a->uid;
93 st->st_gid = a->gid;
94 }
95 if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS)
96 st->st_mode = a->perm;
97 if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) {
98 st->st_atime = a->atime;
99 st->st_mtime = a->mtime;
100 }
101 }
102
103 /* Decode attributes in buffer */
104 Attrib *
decode_attrib(Buffer * b)105 decode_attrib(Buffer *b)
106 {
107 static Attrib a;
108
109 attrib_clear(&a);
110 a.flags = buffer_get_int(b);
111 if (a.flags & SSH2_FILEXFER_ATTR_SIZE)
112 a.size = buffer_get_int64(b);
113 if (a.flags & SSH2_FILEXFER_ATTR_UIDGID) {
114 a.uid = buffer_get_int(b);
115 a.gid = buffer_get_int(b);
116 }
117 if (a.flags & SSH2_FILEXFER_ATTR_PERMISSIONS)
118 a.perm = buffer_get_int(b);
119 if (a.flags & SSH2_FILEXFER_ATTR_ACMODTIME) {
120 a.atime = buffer_get_int(b);
121 a.mtime = buffer_get_int(b);
122 }
123 /* vendor-specific extensions */
124 if (a.flags & SSH2_FILEXFER_ATTR_EXTENDED) {
125 char *type, *data;
126 int i, count;
127
128 count = buffer_get_int(b);
129 for (i = 0; i < count; i++) {
130 type = buffer_get_string(b, NULL);
131 data = buffer_get_string(b, NULL);
132 debug3("Got file attribute \"%s\"", type);
133 free(type);
134 free(data);
135 }
136 }
137 return &a;
138 }
139
140 /* Encode attributes to buffer */
141 void
encode_attrib(Buffer * b,const Attrib * a)142 encode_attrib(Buffer *b, const Attrib *a)
143 {
144 buffer_put_int(b, a->flags);
145 if (a->flags & SSH2_FILEXFER_ATTR_SIZE)
146 buffer_put_int64(b, a->size);
147 if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) {
148 buffer_put_int(b, a->uid);
149 buffer_put_int(b, a->gid);
150 }
151 if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS)
152 buffer_put_int(b, a->perm);
153 if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) {
154 buffer_put_int(b, a->atime);
155 buffer_put_int(b, a->mtime);
156 }
157 }
158
159 /* Convert from SSH2_FX_ status to text error message */
160 const char *
fx2txt(int status)161 fx2txt(int status)
162 {
163 switch (status) {
164 case SSH2_FX_OK:
165 return("No error");
166 case SSH2_FX_EOF:
167 return("End of file");
168 case SSH2_FX_NO_SUCH_FILE:
169 return("No such file or directory");
170 case SSH2_FX_PERMISSION_DENIED:
171 return("Permission denied");
172 case SSH2_FX_FAILURE:
173 return("Failure");
174 case SSH2_FX_BAD_MESSAGE:
175 return("Bad message");
176 case SSH2_FX_NO_CONNECTION:
177 return("No connection");
178 case SSH2_FX_CONNECTION_LOST:
179 return("Connection lost");
180 case SSH2_FX_OP_UNSUPPORTED:
181 return("Operation unsupported");
182 default:
183 return("Unknown status");
184 }
185 /* NOTREACHED */
186 }
187
188 /*
189 * drwxr-xr-x 5 markus markus 1024 Jan 13 18:39 .ssh
190 */
191 char *
ls_file(const char * name,const struct stat * st,int remote,int si_units)192 ls_file(const char *name, const struct stat *st, int remote, int si_units)
193 {
194 int ulen, glen, sz = 0;
195 struct tm *ltime = localtime(&st->st_mtime);
196 const char *user, *group;
197 char buf[1024], mode[11+1], tbuf[12+1], ubuf[11+1], gbuf[11+1];
198 char sbuf[FMT_SCALED_STRSIZE];
199 time_t now;
200
201 strmode(st->st_mode, mode);
202 if (!remote) {
203 user = user_from_uid(st->st_uid, 0);
204 } else {
205 snprintf(ubuf, sizeof ubuf, "%u", (u_int)st->st_uid);
206 user = ubuf;
207 }
208 if (!remote) {
209 group = group_from_gid(st->st_gid, 0);
210 } else {
211 snprintf(gbuf, sizeof gbuf, "%u", (u_int)st->st_gid);
212 group = gbuf;
213 }
214 if (ltime != NULL) {
215 now = time(NULL);
216 if (now - (365*24*60*60)/2 < st->st_mtime &&
217 now >= st->st_mtime)
218 sz = strftime(tbuf, sizeof tbuf, "%b %e %H:%M", ltime);
219 else
220 sz = strftime(tbuf, sizeof tbuf, "%b %e %Y", ltime);
221 }
222 if (sz == 0)
223 tbuf[0] = '\0';
224 ulen = MAX(strlen(user), 8);
225 glen = MAX(strlen(group), 8);
226 if (si_units) {
227 fmt_scaled((long long)st->st_size, sbuf);
228 snprintf(buf, sizeof buf, "%s %3u %-*s %-*s %8s %s %s", mode,
229 (u_int)st->st_nlink, ulen, user, glen, group,
230 sbuf, tbuf, name);
231 } else {
232 snprintf(buf, sizeof buf, "%s %3u %-*s %-*s %8llu %s %s", mode,
233 (u_int)st->st_nlink, ulen, user, glen, group,
234 (unsigned long long)st->st_size, tbuf, name);
235 }
236 return xstrdup(buf);
237 }
238