crypto/openssh-4/sftp-common.c

   1 /*
   2  * Copyright (c) 2001 Markus Friedl.  All rights reserved.
   3  * Copyright (c) 2001 Damien Miller.  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  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  15  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  16  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  17  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  18  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  19  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  20  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  21  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  23  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #include "includes.h"
  27 RCSID("$OpenBSD: sftp-common.c,v 1.10 2003/11/10 16:23:41 jakob Exp $");
  28
  29 #include "buffer.h"
  30 #include "bufaux.h"
  31 #include "log.h"
  32 #include "xmalloc.h"
  33
  34 #include "sftp.h"
  35 #include "sftp-common.h"
  36
  37 /* Clear contents of attributes structure */
  38 void
  39 attrib_clear(Attrib *a)
  40 {
  41         a->flags = 0;
  42         a->size = 0;
  43         a->uid = 0;
  44         a->gid = 0;
  45         a->perm = 0;
  46         a->atime = 0;
  47         a->mtime = 0;
  48 }
  49
  50 /* Convert from struct stat to filexfer attribs */
  51 void
  52 stat_to_attrib(const struct stat *st, Attrib *a)
  53 {
  54         attrib_clear(a);
  55         a->flags = 0;
  56         a->flags |= SSH2_FILEXFER_ATTR_SIZE;
  57         a->size = st->st_size;
  58         a->flags |= SSH2_FILEXFER_ATTR_UIDGID;
  59         a->uid = st->st_uid;
  60         a->gid = st->st_gid;
  61         a->flags |= SSH2_FILEXFER_ATTR_PERMISSIONS;
  62         a->perm = st->st_mode;
  63         a->flags |= SSH2_FILEXFER_ATTR_ACMODTIME;
  64         a->atime = st->st_atime;
  65         a->mtime = st->st_mtime;
  66 }
  67
  68 /* Convert from filexfer attribs to struct stat */
  69 void
  70 attrib_to_stat(const Attrib *a, struct stat *st)
  71 {
  72         memset(st, 0, sizeof(*st));
  73
  74         if (a->flags & SSH2_FILEXFER_ATTR_SIZE)
  75                 st->st_size = a->size;
  76         if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) {
  77                 st->st_uid = a->uid;
  78                 st->st_gid = a->gid;
  79         }
  80         if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS)
  81                 st->st_mode = a->perm;
  82         if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) {
  83                 st->st_atime = a->atime;
  84                 st->st_mtime = a->mtime;
  85         }
  86 }
  87
  88 /* Decode attributes in buffer */
  89 Attrib *
  90 decode_attrib(Buffer *b)
  91 {
  92         static Attrib a;
  93
  94         attrib_clear(&a);
  95         a.flags = buffer_get_int(b);
  96         if (a.flags & SSH2_FILEXFER_ATTR_SIZE)
  97                 a.size = buffer_get_int64(b);
  98         if (a.flags & SSH2_FILEXFER_ATTR_UIDGID) {
  99                 a.uid = buffer_get_int(b);
 100                 a.gid = buffer_get_int(b);
 101         }
 102         if (a.flags & SSH2_FILEXFER_ATTR_PERMISSIONS)
 103                 a.perm = buffer_get_int(b);
 104         if (a.flags & SSH2_FILEXFER_ATTR_ACMODTIME) {
 105                 a.atime = buffer_get_int(b);
 106                 a.mtime = buffer_get_int(b);
 107         }
 108         /* vendor-specific extensions */
 109         if (a.flags & SSH2_FILEXFER_ATTR_EXTENDED) {
 110                 char *type, *data;
 111                 int i, count;
 112
 113                 count = buffer_get_int(b);
 114                 for (i = 0; i < count; i++) {
 115                         type = buffer_get_string(b, NULL);
 116                         data = buffer_get_string(b, NULL);
 117                         debug3("Got file attribute \"%s\"", type);
 118                         xfree(type);
 119                         xfree(data);
 120                 }
 121         }
 122         return &a;
 123 }
 124
 125 /* Encode attributes to buffer */
 126 void
 127 encode_attrib(Buffer *b, const Attrib *a)
 128 {
 129         buffer_put_int(b, a->flags);
 130         if (a->flags & SSH2_FILEXFER_ATTR_SIZE)
 131                 buffer_put_int64(b, a->size);
 132         if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) {
 133                 buffer_put_int(b, a->uid);
 134                 buffer_put_int(b, a->gid);
 135         }
 136         if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS)
 137                 buffer_put_int(b, a->perm);
 138         if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) {
 139                 buffer_put_int(b, a->atime);
 140                 buffer_put_int(b, a->mtime);
 141         }
 142 }
 143
 144 /* Convert from SSH2_FX_ status to text error message */
 145 const char *
 146 fx2txt(int status)
 147 {
 148         switch (status) {
 149         case SSH2_FX_OK:
 150                 return("No error");
 151         case SSH2_FX_EOF:
 152                 return("End of file");
 153         case SSH2_FX_NO_SUCH_FILE:
 154                 return("No such file or directory");
 155         case SSH2_FX_PERMISSION_DENIED:
 156                 return("Permission denied");
 157         case SSH2_FX_FAILURE:
 158                 return("Failure");
 159         case SSH2_FX_BAD_MESSAGE:
 160                 return("Bad message");
 161         case SSH2_FX_NO_CONNECTION:
 162                 return("No connection");
 163         case SSH2_FX_CONNECTION_LOST:
 164                 return("Connection lost");
 165         case SSH2_FX_OP_UNSUPPORTED:
 166                 return("Operation unsupported");
 167         default:
 168                 return("Unknown status");
 169         }
 170         /* NOTREACHED */
 171 }
 172
 173 /*
 174  * drwxr-xr-x    5 markus   markus       1024 Jan 13 18:39 .ssh
 175  */
 176 char *
 177 ls_file(const char *name, const struct stat *st, int remote)
 178 {
 179         int ulen, glen, sz = 0;
 180         struct passwd *pw;
 181         struct group *gr;
 182         struct tm *ltime = localtime(&st->st_mtime);
 183         char *user, *group;
 184         char buf[1024], mode[11+1], tbuf[12+1], ubuf[11+1], gbuf[11+1];
 185
 186         strmode(st->st_mode, mode);
 187         if (!remote && (pw = getpwuid(st->st_uid)) != NULL) {
 188                 user = pw->pw_name;
 189         } else {
 190                 snprintf(ubuf, sizeof ubuf, "%u", (u_int)st->st_uid);
 191                 user = ubuf;
 192         }
 193         if (!remote && (gr = getgrgid(st->st_gid)) != NULL) {
 194                 group = gr->gr_name;
 195         } else {
 196                 snprintf(gbuf, sizeof gbuf, "%u", (u_int)st->st_gid);
 197                 group = gbuf;
 198         }
 199         if (ltime != NULL) {
 200                 if (time(NULL) - st->st_mtime < (365*24*60*60)/2)
 201                         sz = strftime(tbuf, sizeof tbuf, "%b %e %H:%M", ltime);
 202                 else
 203                         sz = strftime(tbuf, sizeof tbuf, "%b %e  %Y", ltime);
 204         }
 205         if (sz == 0)
 206                 tbuf[0] = '\0';
 207         ulen = MAX(strlen(user), 8);
 208         glen = MAX(strlen(group), 8);
 209         snprintf(buf, sizeof buf, "%s %3u %-*s %-*s %8llu %s %s", mode,
 210             (u_int)st->st_nlink, ulen, user, glen, group,
 211             (unsigned long long)st->st_size, tbuf, name);
 212         return xstrdup(buf);
 213 }