crypto/openssh/sftp-common.c

   1 /* $OpenBSD: sftp-common.c,v 1.23 2010/01/15 09:24:23 markus 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
  29 #include <sys/types.h>
  30 #include <sys/stat.h>
  31 #include <sys/param.h>
  32
  33 #include <grp.h>
  34 #include <pwd.h>
  35 #include <stdio.h>
  36 #include <string.h>
  37 #include <time.h>
  38 #include <stdarg.h>
  39 #ifdef HAVE_UTIL_H
  40 #include <util.h>
  41 #endif
  42
  43 #include "xmalloc.h"
  44 #include "buffer.h"
  45 #include "log.h"
  46
  47 #include "sftp.h"
  48 #include "sftp-common.h"
  49
  50 /* Clear contents of attributes structure */
  51 void
  52 attrib_clear(Attrib *a)
  53 {
  54         a->flags = 0;
  55         a->size = 0;
  56         a->uid = 0;
  57         a->gid = 0;
  58         a->perm = 0;
  59         a->atime = 0;
  60         a->mtime = 0;
  61 }
  62
  63 /* Convert from struct stat to filexfer attribs */
  64 void
  65 stat_to_attrib(const struct stat *st, Attrib *a)
  66 {
  67         attrib_clear(a);
  68         a->flags = 0;
  69         a->flags |= SSH2_FILEXFER_ATTR_SIZE;
  70         a->size = st->st_size;
  71         a->flags |= SSH2_FILEXFER_ATTR_UIDGID;
  72         a->uid = st->st_uid;
  73         a->gid = st->st_gid;
  74         a->flags |= SSH2_FILEXFER_ATTR_PERMISSIONS;
  75         a->perm = st->st_mode;
  76         a->flags |= SSH2_FILEXFER_ATTR_ACMODTIME;
  77         a->atime = st->st_atime;
  78         a->mtime = st->st_mtime;
  79 }
  80
  81 /* Convert from filexfer attribs to struct stat */
  82 void
  83 attrib_to_stat(const Attrib *a, struct stat *st)
  84 {
  85         memset(st, 0, sizeof(*st));
  86
  87         if (a->flags & SSH2_FILEXFER_ATTR_SIZE)
  88                 st->st_size = a->size;
  89         if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) {
  90                 st->st_uid = a->uid;
  91                 st->st_gid = a->gid;
  92         }
  93         if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS)
  94                 st->st_mode = a->perm;
  95         if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) {
  96                 st->st_atime = a->atime;
  97                 st->st_mtime = a->mtime;
  98         }
  99 }
 100
 101 /* Decode attributes in buffer */
 102 Attrib *
 103 decode_attrib(Buffer *b)
 104 {
 105         static Attrib a;
 106
 107         attrib_clear(&a);
 108         a.flags = buffer_get_int(b);
 109         if (a.flags & SSH2_FILEXFER_ATTR_SIZE)
 110                 a.size = buffer_get_int64(b);
 111         if (a.flags & SSH2_FILEXFER_ATTR_UIDGID) {
 112                 a.uid = buffer_get_int(b);
 113                 a.gid = buffer_get_int(b);
 114         }
 115         if (a.flags & SSH2_FILEXFER_ATTR_PERMISSIONS)
 116                 a.perm = buffer_get_int(b);
 117         if (a.flags & SSH2_FILEXFER_ATTR_ACMODTIME) {
 118                 a.atime = buffer_get_int(b);
 119                 a.mtime = buffer_get_int(b);
 120         }
 121         /* vendor-specific extensions */
 122         if (a.flags & SSH2_FILEXFER_ATTR_EXTENDED) {
 123                 char *type, *data;
 124                 int i, count;
 125
 126                 count = buffer_get_int(b);
 127                 for (i = 0; i < count; i++) {
 128                         type = buffer_get_string(b, NULL);
 129                         data = buffer_get_string(b, NULL);
 130                         debug3("Got file attribute \"%s\"", type);
 131                         xfree(type);
 132                         xfree(data);
 133                 }
 134         }
 135         return &a;
 136 }
 137
 138 /* Encode attributes to buffer */
 139 void
 140 encode_attrib(Buffer *b, const Attrib *a)
 141 {
 142         buffer_put_int(b, a->flags);
 143         if (a->flags & SSH2_FILEXFER_ATTR_SIZE)
 144                 buffer_put_int64(b, a->size);
 145         if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) {
 146                 buffer_put_int(b, a->uid);
 147                 buffer_put_int(b, a->gid);
 148         }
 149         if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS)
 150                 buffer_put_int(b, a->perm);
 151         if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) {
 152                 buffer_put_int(b, a->atime);
 153                 buffer_put_int(b, a->mtime);
 154         }
 155 }
 156
 157 /* Convert from SSH2_FX_ status to text error message */
 158 const char *
 159 fx2txt(int status)
 160 {
 161         switch (status) {
 162         case SSH2_FX_OK:
 163                 return("No error");
 164         case SSH2_FX_EOF:
 165                 return("End of file");
 166         case SSH2_FX_NO_SUCH_FILE:
 167                 return("No such file or directory");
 168         case SSH2_FX_PERMISSION_DENIED:
 169                 return("Permission denied");
 170         case SSH2_FX_FAILURE:
 171                 return("Failure");
 172         case SSH2_FX_BAD_MESSAGE:
 173                 return("Bad message");
 174         case SSH2_FX_NO_CONNECTION:
 175                 return("No connection");
 176         case SSH2_FX_CONNECTION_LOST:
 177                 return("Connection lost");
 178         case SSH2_FX_OP_UNSUPPORTED:
 179                 return("Operation unsupported");
 180         default:
 181                 return("Unknown status");
 182         }
 183         /* NOTREACHED */
 184 }
 185
 186 /*
 187  * drwxr-xr-x    5 markus   markus       1024 Jan 13 18:39 .ssh
 188  */
 189 char *
 190 ls_file(const char *name, const struct stat *st, int remote, int si_units)
 191 {
 192         int ulen, glen, sz = 0;
 193         struct tm *ltime = localtime(&st->st_mtime);
 194         char *user, *group;
 195         char buf[1024], mode[11+1], tbuf[12+1], ubuf[11+1], gbuf[11+1];
 196         char sbuf[FMT_SCALED_STRSIZE];
 197
 198         strmode(st->st_mode, mode);
 199         if (!remote) {
 200                 user = user_from_uid(st->st_uid, 0);
 201         } else {
 202                 snprintf(ubuf, sizeof ubuf, "%u", (u_int)st->st_uid);
 203                 user = ubuf;
 204         }
 205         if (!remote) {
 206                 group = group_from_gid(st->st_gid, 0);
 207         } else {
 208                 snprintf(gbuf, sizeof gbuf, "%u", (u_int)st->st_gid);
 209                 group = gbuf;
 210         }
 211         if (ltime != NULL) {
 212                 if (time(NULL) - st->st_mtime < (365*24*60*60)/2)
 213                         sz = strftime(tbuf, sizeof tbuf, "%b %e %H:%M", ltime);
 214                 else
 215                         sz = strftime(tbuf, sizeof tbuf, "%b %e  %Y", ltime);
 216         }
 217         if (sz == 0)
 218                 tbuf[0] = '\0';
 219         ulen = MAX(strlen(user), 8);
 220         glen = MAX(strlen(group), 8);
 221         if (si_units) {
 222                 fmt_scaled((long long)st->st_size, sbuf);
 223                 snprintf(buf, sizeof buf, "%s %3u %-*s %-*s %8s %s %s", mode,
 224                     (u_int)st->st_nlink, ulen, user, glen, group,
 225                     sbuf, tbuf, name);
 226         } else {
 227                 snprintf(buf, sizeof buf, "%s %3u %-*s %-*s %8llu %s %s", mode,
 228                     (u_int)st->st_nlink, ulen, user, glen, group,
 229                     (unsigned long long)st->st_size, tbuf, name);
 230         }
 231         return xstrdup(buf);
 232 }