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 } 233