sftp-common.c revision 181097
1/* $OpenBSD: sftp-common.c,v 1.20 2006/08/03 03:34:42 deraadt 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 40#include "xmalloc.h" 41#include "buffer.h" 42#include "log.h" 43 44#include "sftp.h" 45#include "sftp-common.h" 46 47/* Clear contents of attributes structure */ 48void 49attrib_clear(Attrib *a) 50{ 51 a->flags = 0; 52 a->size = 0; 53 a->uid = 0; 54 a->gid = 0; 55 a->perm = 0; 56 a->atime = 0; 57 a->mtime = 0; 58} 59 60/* Convert from struct stat to filexfer attribs */ 61void 62stat_to_attrib(const struct stat *st, Attrib *a) 63{ 64 attrib_clear(a); 65 a->flags = 0; 66 a->flags |= SSH2_FILEXFER_ATTR_SIZE; 67 a->size = st->st_size; 68 a->flags |= SSH2_FILEXFER_ATTR_UIDGID; 69 a->uid = st->st_uid; 70 a->gid = st->st_gid; 71 a->flags |= SSH2_FILEXFER_ATTR_PERMISSIONS; 72 a->perm = st->st_mode; 73 a->flags |= SSH2_FILEXFER_ATTR_ACMODTIME; 74 a->atime = st->st_atime; 75 a->mtime = st->st_mtime; 76} 77 78/* Convert from filexfer attribs to struct stat */ 79void 80attrib_to_stat(const Attrib *a, struct stat *st) 81{ 82 memset(st, 0, sizeof(*st)); 83 84 if (a->flags & SSH2_FILEXFER_ATTR_SIZE) 85 st->st_size = a->size; 86 if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) { 87 st->st_uid = a->uid; 88 st->st_gid = a->gid; 89 } 90 if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) 91 st->st_mode = a->perm; 92 if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) { 93 st->st_atime = a->atime; 94 st->st_mtime = a->mtime; 95 } 96} 97 98/* Decode attributes in buffer */ 99Attrib * 100decode_attrib(Buffer *b) 101{ 102 static Attrib a; 103 104 attrib_clear(&a); 105 a.flags = buffer_get_int(b); 106 if (a.flags & SSH2_FILEXFER_ATTR_SIZE) 107 a.size = buffer_get_int64(b); 108 if (a.flags & SSH2_FILEXFER_ATTR_UIDGID) { 109 a.uid = buffer_get_int(b); 110 a.gid = buffer_get_int(b); 111 } 112 if (a.flags & SSH2_FILEXFER_ATTR_PERMISSIONS) 113 a.perm = buffer_get_int(b); 114 if (a.flags & SSH2_FILEXFER_ATTR_ACMODTIME) { 115 a.atime = buffer_get_int(b); 116 a.mtime = buffer_get_int(b); 117 } 118 /* vendor-specific extensions */ 119 if (a.flags & SSH2_FILEXFER_ATTR_EXTENDED) { 120 char *type, *data; 121 int i, count; 122 123 count = buffer_get_int(b); 124 for (i = 0; i < count; i++) { 125 type = buffer_get_string(b, NULL); 126 data = buffer_get_string(b, NULL); 127 debug3("Got file attribute \"%s\"", type); 128 xfree(type); 129 xfree(data); 130 } 131 } 132 return &a; 133} 134 135/* Encode attributes to buffer */ 136void 137encode_attrib(Buffer *b, const Attrib *a) 138{ 139 buffer_put_int(b, a->flags); 140 if (a->flags & SSH2_FILEXFER_ATTR_SIZE) 141 buffer_put_int64(b, a->size); 142 if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) { 143 buffer_put_int(b, a->uid); 144 buffer_put_int(b, a->gid); 145 } 146 if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) 147 buffer_put_int(b, a->perm); 148 if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) { 149 buffer_put_int(b, a->atime); 150 buffer_put_int(b, a->mtime); 151 } 152} 153 154/* Convert from SSH2_FX_ status to text error message */ 155const char * 156fx2txt(int status) 157{ 158 switch (status) { 159 case SSH2_FX_OK: 160 return("No error"); 161 case SSH2_FX_EOF: 162 return("End of file"); 163 case SSH2_FX_NO_SUCH_FILE: 164 return("No such file or directory"); 165 case SSH2_FX_PERMISSION_DENIED: 166 return("Permission denied"); 167 case SSH2_FX_FAILURE: 168 return("Failure"); 169 case SSH2_FX_BAD_MESSAGE: 170 return("Bad message"); 171 case SSH2_FX_NO_CONNECTION: 172 return("No connection"); 173 case SSH2_FX_CONNECTION_LOST: 174 return("Connection lost"); 175 case SSH2_FX_OP_UNSUPPORTED: 176 return("Operation unsupported"); 177 default: 178 return("Unknown status"); 179 } 180 /* NOTREACHED */ 181} 182 183/* 184 * drwxr-xr-x 5 markus markus 1024 Jan 13 18:39 .ssh 185 */ 186char * 187ls_file(const char *name, const struct stat *st, int remote) 188{ 189 int ulen, glen, sz = 0; 190 struct passwd *pw; 191 struct group *gr; 192 struct tm *ltime = localtime(&st->st_mtime); 193 char *user, *group; 194 char buf[1024], mode[11+1], tbuf[12+1], ubuf[11+1], gbuf[11+1]; 195 196 strmode(st->st_mode, mode); 197 if (!remote && (pw = getpwuid(st->st_uid)) != NULL) { 198 user = pw->pw_name; 199 } else { 200 snprintf(ubuf, sizeof ubuf, "%u", (u_int)st->st_uid); 201 user = ubuf; 202 } 203 if (!remote && (gr = getgrgid(st->st_gid)) != NULL) { 204 group = gr->gr_name; 205 } else { 206 snprintf(gbuf, sizeof gbuf, "%u", (u_int)st->st_gid); 207 group = gbuf; 208 } 209 if (ltime != NULL) { 210 if (time(NULL) - st->st_mtime < (365*24*60*60)/2) 211 sz = strftime(tbuf, sizeof tbuf, "%b %e %H:%M", ltime); 212 else 213 sz = strftime(tbuf, sizeof tbuf, "%b %e %Y", ltime); 214 } 215 if (sz == 0) 216 tbuf[0] = '\0'; 217 ulen = MAX(strlen(user), 8); 218 glen = MAX(strlen(group), 8); 219 snprintf(buf, sizeof buf, "%s %3u %-*s %-*s %8llu %s %s", mode, 220 (u_int)st->st_nlink, ulen, user, glen, group, 221 (unsigned long long)st->st_size, tbuf, name); 222 return xstrdup(buf); 223} 224