1 /* $OpenBSD: sftp-common.c,v 1.26 2014/01/09 03:26:00 guenther Exp $ */ 2 /* $FreeBSD$ */ 3 /* 4 * Copyright (c) 2001 Markus Friedl. All rights reserved. 5 * Copyright (c) 2001 Damien Miller. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #include "includes.h" 29 __RCSID("$FreeBSD$"); 30 31 #include <sys/types.h> 32 #include <sys/stat.h> 33 #include <sys/param.h> 34 35 #include <grp.h> 36 #include <pwd.h> 37 #include <stdio.h> 38 #include <stdlib.h> 39 #include <string.h> 40 #include <time.h> 41 #include <stdarg.h> 42 #ifdef HAVE_UTIL_H 43 #include <util.h> 44 #endif 45 46 #include "xmalloc.h" 47 #include "buffer.h" 48 #include "log.h" 49 50 #include "sftp.h" 51 #include "sftp-common.h" 52 53 /* Clear contents of attributes structure */ 54 void 55 attrib_clear(Attrib *a) 56 { 57 a->flags = 0; 58 a->size = 0; 59 a->uid = 0; 60 a->gid = 0; 61 a->perm = 0; 62 a->atime = 0; 63 a->mtime = 0; 64 } 65 66 /* Convert from struct stat to filexfer attribs */ 67 void 68 stat_to_attrib(const struct stat *st, Attrib *a) 69 { 70 attrib_clear(a); 71 a->flags = 0; 72 a->flags |= SSH2_FILEXFER_ATTR_SIZE; 73 a->size = st->st_size; 74 a->flags |= SSH2_FILEXFER_ATTR_UIDGID; 75 a->uid = st->st_uid; 76 a->gid = st->st_gid; 77 a->flags |= SSH2_FILEXFER_ATTR_PERMISSIONS; 78 a->perm = st->st_mode; 79 a->flags |= SSH2_FILEXFER_ATTR_ACMODTIME; 80 a->atime = st->st_atime; 81 a->mtime = st->st_mtime; 82 } 83 84 /* Convert from filexfer attribs to struct stat */ 85 void 86 attrib_to_stat(const Attrib *a, struct stat *st) 87 { 88 memset(st, 0, sizeof(*st)); 89 90 if (a->flags & SSH2_FILEXFER_ATTR_SIZE) 91 st->st_size = a->size; 92 if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) { 93 st->st_uid = a->uid; 94 st->st_gid = a->gid; 95 } 96 if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) 97 st->st_mode = a->perm; 98 if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) { 99 st->st_atime = a->atime; 100 st->st_mtime = a->mtime; 101 } 102 } 103 104 /* Decode attributes in buffer */ 105 Attrib * 106 decode_attrib(Buffer *b) 107 { 108 static Attrib a; 109 110 attrib_clear(&a); 111 a.flags = buffer_get_int(b); 112 if (a.flags & SSH2_FILEXFER_ATTR_SIZE) 113 a.size = buffer_get_int64(b); 114 if (a.flags & SSH2_FILEXFER_ATTR_UIDGID) { 115 a.uid = buffer_get_int(b); 116 a.gid = buffer_get_int(b); 117 } 118 if (a.flags & SSH2_FILEXFER_ATTR_PERMISSIONS) 119 a.perm = buffer_get_int(b); 120 if (a.flags & SSH2_FILEXFER_ATTR_ACMODTIME) { 121 a.atime = buffer_get_int(b); 122 a.mtime = buffer_get_int(b); 123 } 124 /* vendor-specific extensions */ 125 if (a.flags & SSH2_FILEXFER_ATTR_EXTENDED) { 126 char *type, *data; 127 int i, count; 128 129 count = buffer_get_int(b); 130 for (i = 0; i < count; i++) { 131 type = buffer_get_string(b, NULL); 132 data = buffer_get_string(b, NULL); 133 debug3("Got file attribute \"%s\"", type); 134 free(type); 135 free(data); 136 } 137 } 138 return &a; 139 } 140 141 /* Encode attributes to buffer */ 142 void 143 encode_attrib(Buffer *b, const Attrib *a) 144 { 145 buffer_put_int(b, a->flags); 146 if (a->flags & SSH2_FILEXFER_ATTR_SIZE) 147 buffer_put_int64(b, a->size); 148 if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) { 149 buffer_put_int(b, a->uid); 150 buffer_put_int(b, a->gid); 151 } 152 if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) 153 buffer_put_int(b, a->perm); 154 if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) { 155 buffer_put_int(b, a->atime); 156 buffer_put_int(b, a->mtime); 157 } 158 } 159 160 /* Convert from SSH2_FX_ status to text error message */ 161 const char * 162 fx2txt(int status) 163 { 164 switch (status) { 165 case SSH2_FX_OK: 166 return("No error"); 167 case SSH2_FX_EOF: 168 return("End of file"); 169 case SSH2_FX_NO_SUCH_FILE: 170 return("No such file or directory"); 171 case SSH2_FX_PERMISSION_DENIED: 172 return("Permission denied"); 173 case SSH2_FX_FAILURE: 174 return("Failure"); 175 case SSH2_FX_BAD_MESSAGE: 176 return("Bad message"); 177 case SSH2_FX_NO_CONNECTION: 178 return("No connection"); 179 case SSH2_FX_CONNECTION_LOST: 180 return("Connection lost"); 181 case SSH2_FX_OP_UNSUPPORTED: 182 return("Operation unsupported"); 183 default: 184 return("Unknown status"); 185 } 186 /* NOTREACHED */ 187 } 188 189 /* 190 * drwxr-xr-x 5 markus markus 1024 Jan 13 18:39 .ssh 191 */ 192 char * 193 ls_file(const char *name, const struct stat *st, int remote, int si_units) 194 { 195 int ulen, glen, sz = 0; 196 struct tm *ltime = localtime(&st->st_mtime); 197 const char *user, *group; 198 char buf[1024], mode[11+1], tbuf[12+1], ubuf[11+1], gbuf[11+1]; 199 char sbuf[FMT_SCALED_STRSIZE]; 200 time_t now; 201 202 strmode(st->st_mode, mode); 203 if (!remote) { 204 user = user_from_uid(st->st_uid, 0); 205 } else { 206 snprintf(ubuf, sizeof ubuf, "%u", (u_int)st->st_uid); 207 user = ubuf; 208 } 209 if (!remote) { 210 group = group_from_gid(st->st_gid, 0); 211 } else { 212 snprintf(gbuf, sizeof gbuf, "%u", (u_int)st->st_gid); 213 group = gbuf; 214 } 215 if (ltime != NULL) { 216 now = time(NULL); 217 if (now - (365*24*60*60)/2 < st->st_mtime && 218 now >= st->st_mtime) 219 sz = strftime(tbuf, sizeof tbuf, "%b %e %H:%M", ltime); 220 else 221 sz = strftime(tbuf, sizeof tbuf, "%b %e %Y", ltime); 222 } 223 if (sz == 0) 224 tbuf[0] = '\0'; 225 ulen = MAX(strlen(user), 8); 226 glen = MAX(strlen(group), 8); 227 if (si_units) { 228 fmt_scaled((long long)st->st_size, sbuf); 229 snprintf(buf, sizeof buf, "%s %3u %-*s %-*s %8s %s %s", mode, 230 (u_int)st->st_nlink, ulen, user, glen, group, 231 sbuf, tbuf, name); 232 } else { 233 snprintf(buf, sizeof buf, "%s %3u %-*s %-*s %8llu %s %s", mode, 234 (u_int)st->st_nlink, ulen, user, glen, group, 235 (unsigned long long)st->st_size, tbuf, name); 236 } 237 return xstrdup(buf); 238 } 239