sftp-common.c

   1 /* $OpenBSD: sftp-common.c,v 1.15 2006/07/06 16:03:53 stevesk 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
  32 #include <grp.h>
  33 #include <pwd.h>
  34
  35 #include "buffer.h"
  36 #include "bufaux.h"
  37 #include "log.h"
  38 #include "xmalloc.h"
  39
  40 #include "sftp.h"
  41 #include "sftp-common.h"
  42
  43 /* Clear contents of attributes structure */
  44 void
  45 attrib_clear(Attrib *a)
  46 {
  47         a->flags = 0;
  48         a->size = 0;
  49         a->uid = 0;
  50         a->gid = 0;
  51         a->perm = 0;
  52         a->atime = 0;
  53         a->mtime = 0;
  54 }
  55
  56 /* Convert from struct stat to filexfer attribs */
  57 void
  58 stat_to_attrib(const struct stat *st, Attrib *a)
  59 {
  60         attrib_clear(a);
  61         a->flags = 0;
  62         a->flags |= SSH2_FILEXFER_ATTR_SIZE;
  63         a->size = st->st_size;
  64         a->flags |= SSH2_FILEXFER_ATTR_UIDGID;
  65         a->uid = st->st_uid;
  66         a->gid = st->st_gid;
  67         a->flags |= SSH2_FILEXFER_ATTR_PERMISSIONS;
  68         a->perm = st->st_mode;
  69         a->flags |= SSH2_FILEXFER_ATTR_ACMODTIME;
  70         a->atime = st->st_atime;
  71         a->mtime = st->st_mtime;
  72 }
  73
  74 /* Convert from filexfer attribs to struct stat */
  75 void
  76 attrib_to_stat(const Attrib *a, struct stat *st)
  77 {
  78         memset(st, 0, sizeof(*st));
  79
  80         if (a->flags & SSH2_FILEXFER_ATTR_SIZE)
  81                 st->st_size = a->size;
  82         if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) {
  83                 st->st_uid = a->uid;
  84                 st->st_gid = a->gid;
  85         }
  86         if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS)
  87                 st->st_mode = a->perm;
  88         if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) {
  89                 st->st_atime = a->atime;
  90                 st->st_mtime = a->mtime;
  91         }
  92 }
  93
  94 /* Decode attributes in buffer */
  95 Attrib *
  96 decode_attrib(Buffer *b)
  97 {
  98         static Attrib a;
  99
 100         attrib_clear(&a);
 101         a.flags = buffer_get_int(b);
 102         if (a.flags & SSH2_FILEXFER_ATTR_SIZE)
 103                 a.size = buffer_get_int64(b);
 104         if (a.flags & SSH2_FILEXFER_ATTR_UIDGID) {
 105                 a.uid = buffer_get_int(b);
 106                 a.gid = buffer_get_int(b);
 107         }
 108         if (a.flags & SSH2_FILEXFER_ATTR_PERMISSIONS)
 109                 a.perm = buffer_get_int(b);
 110         if (a.flags & SSH2_FILEXFER_ATTR_ACMODTIME) {
 111                 a.atime = buffer_get_int(b);
 112                 a.mtime = buffer_get_int(b);
 113         }
 114         /* vendor-specific extensions */
 115         if (a.flags & SSH2_FILEXFER_ATTR_EXTENDED) {
 116                 char *type, *data;
 117                 int i, count;
 118
 119                 count = buffer_get_int(b);
 120                 for (i = 0; i < count; i++) {
 121                         type = buffer_get_string(b, NULL);
 122                         data = buffer_get_string(b, NULL);
 123                         debug3("Got file attribute \"%s\"", type);
 124                         xfree(type);
 125                         xfree(data);
 126                 }
 127         }
 128         return &a;
 129 }
 130
 131 /* Encode attributes to buffer */
 132 void
 133 encode_attrib(Buffer *b, const Attrib *a)
 134 {
 135         buffer_put_int(b, a->flags);
 136         if (a->flags & SSH2_FILEXFER_ATTR_SIZE)
 137                 buffer_put_int64(b, a->size);
 138         if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) {
 139                 buffer_put_int(b, a->uid);
 140                 buffer_put_int(b, a->gid);
 141         }
 142         if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS)
 143                 buffer_put_int(b, a->perm);
 144         if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) {
 145                 buffer_put_int(b, a->atime);
 146                 buffer_put_int(b, a->mtime);
 147         }
 148 }
 149
 150 /* Convert from SSH2_FX_ status to text error message */
 151 const char *
 152 fx2txt(int status)
 153 {
 154         switch (status) {
 155         case SSH2_FX_OK:
 156                 return("No error");
 157         case SSH2_FX_EOF:
 158                 return("End of file");
 159         case SSH2_FX_NO_SUCH_FILE:
 160                 return("No such file or directory");
 161         case SSH2_FX_PERMISSION_DENIED:
 162                 return("Permission denied");
 163         case SSH2_FX_FAILURE:
 164                 return("Failure");
 165         case SSH2_FX_BAD_MESSAGE:
 166                 return("Bad message");
 167         case SSH2_FX_NO_CONNECTION:
 168                 return("No connection");
 169         case SSH2_FX_CONNECTION_LOST:
 170                 return("Connection lost");
 171         case SSH2_FX_OP_UNSUPPORTED:
 172                 return("Operation unsupported");
 173         default:
 174                 return("Unknown status");
 175         }
 176         /* NOTREACHED */
 177 }
 178
 179 /*
 180  * drwxr-xr-x    5 markus   markus       1024 Jan 13 18:39 .ssh
 181  */
 182 char *
 183 ls_file(const char *name, const struct stat *st, int remote)
 184 {
 185         int ulen, glen, sz = 0;
 186         struct passwd *pw;
 187         struct group *gr;
 188         struct tm *ltime = localtime(&st->st_mtime);
 189         char *user, *group;
 190         char buf[1024], mode[11+1], tbuf[12+1], ubuf[11+1], gbuf[11+1];
 191
 192         strmode(st->st_mode, mode);
 193         if (!remote && (pw = getpwuid(st->st_uid)) != NULL) {
 194                 user = pw->pw_name;
 195         } else {
 196                 snprintf(ubuf, sizeof ubuf, "%u", (u_int)st->st_uid);
 197                 user = ubuf;
 198         }
 199         if (!remote && (gr = getgrgid(st->st_gid)) != NULL) {
 200                 group = gr->gr_name;
 201         } else {
 202                 snprintf(gbuf, sizeof gbuf, "%u", (u_int)st->st_gid);
 203                 group = gbuf;
 204         }
 205         if (ltime != NULL) {
 206                 if (time(NULL) - st->st_mtime < (365*24*60*60)/2)
 207                         sz = strftime(tbuf, sizeof tbuf, "%b %e %H:%M", ltime);
 208                 else
 209                         sz = strftime(tbuf, sizeof tbuf, "%b %e  %Y", ltime);
 210         }
 211         if (sz == 0)
 212                 tbuf[0] = '\0';
 213         ulen = MAX(strlen(user), 8);
 214         glen = MAX(strlen(group), 8);
 215         snprintf(buf, sizeof buf, "%s %3u %-*s %-*s %8llu %s %s", mode,
 216             (u_int)st->st_nlink, ulen, user, glen, group,
 217             (unsigned long long)st->st_size, tbuf, name);
 218         return xstrdup(buf);
 219 }