| 1 | /* |
| 2 | Copyright (C) Andrew Tridgell 1996 |
| 3 | Copyright (C) Paul Mackerras 1996 |
| 4 | |
| 5 | This program is free software; you can redistribute it and/or modify |
| 6 | it under the terms of the GNU General Public License as published by |
| 7 | the Free Software Foundation; either version 2 of the License, or |
| 8 | (at your option) any later version. |
| 9 | |
| 10 | This program is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | GNU General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU General Public License |
| 16 | along with this program; if not, write to the Free Software |
| 17 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 18 | */ |
| 19 | |
| 20 | /* this file contains code used by more than one part of the rsync |
| 21 | process */ |
| 22 | |
| 23 | #include "rsync.h" |
| 24 | |
| 25 | extern int verbose; |
| 26 | extern int dry_run; |
| 27 | extern int preserve_times; |
| 28 | extern int omit_dir_times; |
| 29 | extern int am_root; |
| 30 | extern int am_server; |
| 31 | extern int am_sender; |
| 32 | extern int am_generator; |
| 33 | extern int preserve_uid; |
| 34 | extern int preserve_gid; |
| 35 | extern int force_delete; |
| 36 | extern int recurse; |
| 37 | extern int keep_dirlinks; |
| 38 | extern int make_backups; |
| 39 | extern char *backup_dir; |
| 40 | extern int inplace; |
| 41 | |
| 42 | |
| 43 | /* |
| 44 | free a sums struct |
| 45 | */ |
| 46 | void free_sums(struct sum_struct *s) |
| 47 | { |
| 48 | if (s->sums) free(s->sums); |
| 49 | free(s); |
| 50 | } |
| 51 | |
| 52 | |
| 53 | /* |
| 54 | * delete a file or directory. If force_delete is set then delete |
| 55 | * recursively |
| 56 | */ |
| 57 | int delete_file(char *fname, int flags) |
| 58 | { |
| 59 | DIR *d; |
| 60 | struct dirent *di; |
| 61 | char buf[MAXPATHLEN]; |
| 62 | STRUCT_STAT st; |
| 63 | int zap_dir; |
| 64 | |
| 65 | if (!(flags & DEL_DIR)) { |
| 66 | if (robust_unlink(fname) == 0) { |
| 67 | if (verbose && !(flags & DEL_TERSE)) { |
| 68 | rprintf(FINFO, "deleting %s\n", |
| 69 | safe_fname(fname)); |
| 70 | } |
| 71 | return 0; |
| 72 | } |
| 73 | if (errno == ENOENT) |
| 74 | return 0; |
| 75 | rsyserr(FERROR, errno, "delete_file: unlink %s failed", |
| 76 | full_fname(fname)); |
| 77 | return -1; |
| 78 | } |
| 79 | |
| 80 | zap_dir = (flags & DEL_FORCE_RECURSE || (force_delete && recurse)) |
| 81 | && !(flags & DEL_NO_RECURSE); |
| 82 | if (dry_run && zap_dir) |
| 83 | errno = ENOTEMPTY; |
| 84 | else if (do_rmdir(fname) == 0) { |
| 85 | if (verbose && !(flags & DEL_TERSE)) { |
| 86 | rprintf(FINFO, "deleting %s/\n", |
| 87 | safe_fname(fname)); |
| 88 | } |
| 89 | return 0; |
| 90 | } |
| 91 | if (errno == ENOENT) |
| 92 | return 0; |
| 93 | if (!zap_dir || (errno != ENOTEMPTY && errno != EEXIST)) { |
| 94 | rsyserr(FERROR, errno, "delete_file: rmdir %s failed", |
| 95 | full_fname(fname)); |
| 96 | return -1; |
| 97 | } |
| 98 | |
| 99 | /* now we do a recsursive delete on the directory ... */ |
| 100 | if (!(d = opendir(fname))) { |
| 101 | rsyserr(FERROR, errno, "delete_file: opendir %s failed", |
| 102 | full_fname(fname)); |
| 103 | return -1; |
| 104 | } |
| 105 | |
| 106 | if (!(flags & DEL_TERSE)) { |
| 107 | if (verbose) |
| 108 | rprintf(FINFO, "deleting %s/\n", safe_fname(fname)); |
| 109 | flags |= DEL_TERSE; |
| 110 | } |
| 111 | |
| 112 | for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) { |
| 113 | char *dname = d_name(di); |
| 114 | if (dname[0] == '.' && (dname[1] == '\0' |
| 115 | || (dname[1] == '.' && dname[2] == '\0'))) |
| 116 | continue; |
| 117 | pathjoin(buf, sizeof buf, fname, dname); |
| 118 | |
| 119 | if (do_lstat(buf, &st) < 0) |
| 120 | continue; |
| 121 | if (S_ISDIR(st.st_mode)) |
| 122 | flags |= DEL_DIR; |
| 123 | else |
| 124 | flags &= ~DEL_DIR; |
| 125 | |
| 126 | if (verbose) { |
| 127 | rprintf(FINFO, "deleting %s%s\n", safe_fname(buf), |
| 128 | flags & DEL_DIR ? "/" : ""); |
| 129 | } |
| 130 | if (delete_file(buf, flags) != 0) { |
| 131 | closedir(d); |
| 132 | return -1; |
| 133 | } |
| 134 | } |
| 135 | if (errno) { |
| 136 | rsyserr(FERROR, errno, "delete_file: readdir %s failed", |
| 137 | full_fname(fname)); |
| 138 | closedir(d); |
| 139 | return -1; |
| 140 | } |
| 141 | |
| 142 | closedir(d); |
| 143 | |
| 144 | if (do_rmdir(fname) != 0 && errno != ENOENT) { |
| 145 | rsyserr(FERROR, errno, "delete_file: rmdir %s failed", |
| 146 | full_fname(fname)); |
| 147 | return -1; |
| 148 | } |
| 149 | |
| 150 | return 0; |
| 151 | } |
| 152 | |
| 153 | int set_perms(char *fname,struct file_struct *file,STRUCT_STAT *st, |
| 154 | int flags) |
| 155 | { |
| 156 | int updated = 0; |
| 157 | STRUCT_STAT st2; |
| 158 | int change_uid, change_gid; |
| 159 | |
| 160 | if (!st) { |
| 161 | if (dry_run) |
| 162 | return 1; |
| 163 | if (link_stat(fname, &st2, 0) < 0) { |
| 164 | rsyserr(FERROR, errno, "stat %s failed", |
| 165 | full_fname(fname)); |
| 166 | return 0; |
| 167 | } |
| 168 | st = &st2; |
| 169 | } |
| 170 | |
| 171 | if (!preserve_times || S_ISLNK(st->st_mode) |
| 172 | || (S_ISDIR(st->st_mode) |
| 173 | && (omit_dir_times || (make_backups && !backup_dir)))) |
| 174 | flags |= PERMS_SKIP_MTIME; |
| 175 | if (!(flags & PERMS_SKIP_MTIME) |
| 176 | && cmp_modtime(st->st_mtime, file->modtime) != 0) { |
| 177 | if (set_modtime(fname,file->modtime) != 0) { |
| 178 | rsyserr(FERROR, errno, "failed to set times on %s", |
| 179 | full_fname(fname)); |
| 180 | return 0; |
| 181 | } |
| 182 | updated = 1; |
| 183 | } |
| 184 | |
| 185 | change_uid = am_root && preserve_uid && st->st_uid != file->uid; |
| 186 | change_gid = preserve_gid && file->gid != GID_NONE |
| 187 | && st->st_gid != file->gid; |
| 188 | #if !defined HAVE_LCHOWN && !defined CHOWN_MODIFIES_SYMLINK |
| 189 | if (S_ISLNK(st->st_mode)) |
| 190 | ; |
| 191 | else |
| 192 | #endif |
| 193 | if (change_uid || change_gid) { |
| 194 | if (verbose > 2) { |
| 195 | if (change_uid) { |
| 196 | rprintf(FINFO, |
| 197 | "set uid of %s from %ld to %ld\n", |
| 198 | safe_fname(fname), |
| 199 | (long)st->st_uid, (long)file->uid); |
| 200 | } |
| 201 | if (change_gid) { |
| 202 | rprintf(FINFO, |
| 203 | "set gid of %s from %ld to %ld\n", |
| 204 | safe_fname(fname), |
| 205 | (long)st->st_gid, (long)file->gid); |
| 206 | } |
| 207 | } |
| 208 | if (do_lchown(fname, |
| 209 | change_uid ? file->uid : st->st_uid, |
| 210 | change_gid ? file->gid : st->st_gid) != 0) { |
| 211 | /* shouldn't have attempted to change uid or gid |
| 212 | * unless have the privilege */ |
| 213 | rsyserr(FERROR, errno, "%s %s failed", |
| 214 | change_uid ? "chown" : "chgrp", |
| 215 | full_fname(fname)); |
| 216 | return 0; |
| 217 | } |
| 218 | /* a lchown had been done - we have to re-stat if the |
| 219 | * destination had the setuid or setgid bits set due |
| 220 | * to the side effect of the chown call */ |
| 221 | if (st->st_mode & (S_ISUID | S_ISGID)) { |
| 222 | link_stat(fname, st, |
| 223 | keep_dirlinks && S_ISDIR(st->st_mode)); |
| 224 | } |
| 225 | updated = 1; |
| 226 | } |
| 227 | |
| 228 | #ifdef HAVE_CHMOD |
| 229 | if (!S_ISLNK(st->st_mode)) { |
| 230 | if ((st->st_mode & CHMOD_BITS) != (file->mode & CHMOD_BITS)) { |
| 231 | updated = 1; |
| 232 | if (do_chmod(fname,(file->mode & CHMOD_BITS)) != 0) { |
| 233 | rsyserr(FERROR, errno, "failed to set permissions on %s", |
| 234 | full_fname(fname)); |
| 235 | return 0; |
| 236 | } |
| 237 | } |
| 238 | } |
| 239 | #endif |
| 240 | |
| 241 | if (verbose > 1 && flags & PERMS_REPORT) { |
| 242 | if (updated) |
| 243 | rprintf(FINFO, "%s\n", safe_fname(fname)); |
| 244 | else |
| 245 | rprintf(FINFO, "%s is uptodate\n", safe_fname(fname)); |
| 246 | } |
| 247 | return updated; |
| 248 | } |
| 249 | |
| 250 | |
| 251 | void sig_int(void) |
| 252 | { |
| 253 | /* KLUGE: if the user hits Ctrl-C while ssh is prompting |
| 254 | * for a password, then our cleanup's sending of a SIGUSR1 |
| 255 | * signal to all our children may kill ssh before it has a |
| 256 | * chance to restore the tty settings (i.e. turn echo back |
| 257 | * on). By sleeping for a short time, ssh gets a bigger |
| 258 | * chance to do the right thing. If child processes are |
| 259 | * not ssh waiting for a password, then this tiny delay |
| 260 | * shouldn't hurt anything. */ |
| 261 | msleep(400); |
| 262 | exit_cleanup(RERR_SIGNAL); |
| 263 | } |
| 264 | |
| 265 | |
| 266 | /* finish off a file transfer, renaming the file and setting the permissions |
| 267 | and ownership */ |
| 268 | void finish_transfer(char *fname, char *fnametmp, struct file_struct *file, |
| 269 | int ok_to_set_time, int overwriting_basis) |
| 270 | { |
| 271 | int ret; |
| 272 | |
| 273 | if (inplace) { |
| 274 | if (verbose > 2) |
| 275 | rprintf(FINFO, "finishing %s\n", safe_fname(fname)); |
| 276 | goto do_set_perms; |
| 277 | } |
| 278 | |
| 279 | if (make_backups && overwriting_basis && !make_backup(fname)) |
| 280 | return; |
| 281 | |
| 282 | /* Change permissions before putting the file into place. */ |
| 283 | set_perms(fnametmp, file, NULL, ok_to_set_time ? 0 : PERMS_SKIP_MTIME); |
| 284 | |
| 285 | /* move tmp file over real file */ |
| 286 | if (verbose > 2) { |
| 287 | rprintf(FINFO, "renaming %s to %s\n", |
| 288 | safe_fname(fnametmp), safe_fname(fname)); |
| 289 | } |
| 290 | ret = robust_rename(fnametmp, fname, file->mode & INITACCESSPERMS); |
| 291 | if (ret < 0) { |
| 292 | rsyserr(FERROR, errno, "%s %s -> \"%s\"", |
| 293 | ret == -2 ? "copy" : "rename", |
| 294 | full_fname(fnametmp), safe_fname(fname)); |
| 295 | do_unlink(fnametmp); |
| 296 | return; |
| 297 | } |
| 298 | if (ret == 0) { |
| 299 | /* The file was moved into place (not copied), so it's done. */ |
| 300 | return; |
| 301 | } |
| 302 | do_set_perms: |
| 303 | set_perms(fname, file, NULL, ok_to_set_time ? 0 : PERMS_SKIP_MTIME); |
| 304 | } |
| 305 | |
| 306 | const char *who_am_i(void) |
| 307 | { |
| 308 | if (am_sender < 0) |
| 309 | return am_server ? "server" : "client"; |
| 310 | return am_sender ? "sender" : am_generator ? "generator" : "receiver"; |
| 311 | } |