sftp-common.c revision 1.23
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 <sys/types.h> 28#include <sys/stat.h> 29#include <sys/param.h> 30 31#include <grp.h> 32#include <pwd.h> 33#include <stdio.h> 34#include <string.h> 35#include <time.h> 36#include <stdarg.h> 37#include <util.h> 38 39#include "xmalloc.h" 40#include "buffer.h" 41#include "log.h" 42 43#include "sftp.h" 44#include "sftp-common.h" 45 46/* Clear contents of attributes structure */ 47void 48attrib_clear(Attrib *a) 49{ 50 a->flags = 0; 51 a->size = 0; 52 a->uid = 0; 53 a->gid = 0; 54 a->perm = 0; 55 a->atime = 0; 56 a->mtime = 0; 57} 58 59/* Convert from struct stat to filexfer attribs */ 60void 61stat_to_attrib(const struct stat *st, Attrib *a) 62{ 63 attrib_clear(a); 64 a->flags = 0; 65 a->flags |= SSH2_FILEXFER_ATTR_SIZE; 66 a->size = st->st_size; 67 a->flags |= SSH2_FILEXFER_ATTR_UIDGID; 68 a->uid = st->st_uid; 69 a->gid = st->st_gid; 70 a->flags |= SSH2_FILEXFER_ATTR_PERMISSIONS; 71 a->perm = st->st_mode; 72 a->flags |= SSH2_FILEXFER_ATTR_ACMODTIME; 73 a->atime = st->st_atime; 74 a->mtime = st->st_mtime; 75} 76 77/* Convert from filexfer attribs to struct stat */ 78void 79attrib_to_stat(const Attrib *a, struct stat *st) 80{ 81 memset(st, 0, sizeof(*st)); 82 83 if (a->flags & SSH2_FILEXFER_ATTR_SIZE) 84 st->st_size = a->size; 85 if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) { 86 st->st_uid = a->uid; 87 st->st_gid = a->gid; 88 } 89 if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) 90 st->st_mode = a->perm; 91 if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) { 92 st->st_atime = a->atime; 93 st->st_mtime = a->mtime; 94 } 95} 96 97/* Decode attributes in buffer */ 98Attrib * 99decode_attrib(Buffer *b) 100{ 101 static Attrib a; 102 103 attrib_clear(&a); 104 a.flags = buffer_get_int(b); 105 if (a.flags & SSH2_FILEXFER_ATTR_SIZE) 106 a.size = buffer_get_int64(b); 107 if (a.flags & SSH2_FILEXFER_ATTR_UIDGID) { 108 a.uid = buffer_get_int(b); 109 a.gid = buffer_get_int(b); 110 } 111 if (a.flags & SSH2_FILEXFER_ATTR_PERMISSIONS) 112 a.perm = buffer_get_int(b); 113 if (a.flags & SSH2_FILEXFER_ATTR_ACMODTIME) { 114 a.atime = buffer_get_int(b); 115 a.mtime = buffer_get_int(b); 116 } 117 /* vendor-specific extensions */ 118 if (a.flags & SSH2_FILEXFER_ATTR_EXTENDED) { 119 char *type, *data; 120 int i, count; 121 122 count = buffer_get_int(b); 123 for (i = 0; i < count; i++) { 124 type = buffer_get_string(b, NULL); 125 data = buffer_get_string(b, NULL); 126 debug3("Got file attribute \"%s\"", type); 127 xfree(type); 128 xfree(data); 129 } 130 } 131 return &a; 132} 133 134/* Encode attributes to buffer */ 135void 136encode_attrib(Buffer *b, const Attrib *a) 137{ 138 buffer_put_int(b, a->flags); 139 if (a->flags & SSH2_FILEXFER_ATTR_SIZE) 140 buffer_put_int64(b, a->size); 141 if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) { 142 buffer_put_int(b, a->uid); 143 buffer_put_int(b, a->gid); 144 } 145 if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) 146 buffer_put_int(b, a->perm); 147 if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) { 148 buffer_put_int(b, a->atime); 149 buffer_put_int(b, a->mtime); 150 } 151} 152 153/* Convert from SSH2_FX_ status to text error message */ 154const char * 155fx2txt(int status) 156{ 157 switch (status) { 158 case SSH2_FX_OK: 159 return("No error"); 160 case SSH2_FX_EOF: 161 return("End of file"); 162 case SSH2_FX_NO_SUCH_FILE: 163 return("No such file or directory"); 164 case SSH2_FX_PERMISSION_DENIED: 165 return("Permission denied"); 166 case SSH2_FX_FAILURE: 167 return("Failure"); 168 case SSH2_FX_BAD_MESSAGE: 169 return("Bad message"); 170 case SSH2_FX_NO_CONNECTION: 171 return("No connection"); 172 case SSH2_FX_CONNECTION_LOST: 173 return("Connection lost"); 174 case SSH2_FX_OP_UNSUPPORTED: 175 return("Operation unsupported"); 176 default: 177 return("Unknown status"); 178 } 179 /* NOTREACHED */ 180} 181 182/* 183 * drwxr-xr-x 5 markus markus 1024 Jan 13 18:39 .ssh 184 */ 185char * 186ls_file(const char *name, const struct stat *st, int remote, int si_units) 187{ 188 int ulen, glen, sz = 0; 189 struct tm *ltime = localtime(&st->st_mtime); 190 char *user, *group; 191 char buf[1024], mode[11+1], tbuf[12+1], ubuf[11+1], gbuf[11+1]; 192 char sbuf[FMT_SCALED_STRSIZE]; 193 194 strmode(st->st_mode, mode); 195 if (!remote) { 196 user = user_from_uid(st->st_uid, 0); 197 } else { 198 snprintf(ubuf, sizeof ubuf, "%u", (u_int)st->st_uid); 199 user = ubuf; 200 } 201 if (!remote) { 202 group = group_from_gid(st->st_gid, 0); 203 } else { 204 snprintf(gbuf, sizeof gbuf, "%u", (u_int)st->st_gid); 205 group = gbuf; 206 } 207 if (ltime != NULL) { 208 if (time(NULL) - st->st_mtime < (365*24*60*60)/2) 209 sz = strftime(tbuf, sizeof tbuf, "%b %e %H:%M", ltime); 210 else 211 sz = strftime(tbuf, sizeof tbuf, "%b %e %Y", ltime); 212 } 213 if (sz == 0) 214 tbuf[0] = '\0'; 215 ulen = MAX(strlen(user), 8); 216 glen = MAX(strlen(group), 8); 217 if (si_units) { 218 fmt_scaled((long long)st->st_size, sbuf); 219 snprintf(buf, sizeof buf, "%s %3u %-*s %-*s %8s %s %s", mode, 220 (u_int)st->st_nlink, ulen, user, glen, group, 221 sbuf, tbuf, name); 222 } else { 223 snprintf(buf, sizeof buf, "%s %3u %-*s %-*s %8llu %s %s", mode, 224 (u_int)st->st_nlink, ulen, user, glen, group, 225 (unsigned long long)st->st_size, tbuf, name); 226 } 227 return xstrdup(buf); 228} 229