Annotation of embedaddon/rsync/delete.c, revision 1.1
1.1 ! misho 1: /*
! 2: * Deletion routines used in rsync.
! 3: *
! 4: * Copyright (C) 1996-2000 Andrew Tridgell
! 5: * Copyright (C) 1996 Paul Mackerras
! 6: * Copyright (C) 2002 Martin Pool <mbp@samba.org>
! 7: * Copyright (C) 2003-2013 Wayne Davison
! 8: *
! 9: * This program is free software; you can redistribute it and/or modify
! 10: * it under the terms of the GNU General Public License as published by
! 11: * the Free Software Foundation; either version 3 of the License, or
! 12: * (at your option) any later version.
! 13: *
! 14: * This program is distributed in the hope that it will be useful,
! 15: * but WITHOUT ANY WARRANTY; without even the implied warranty of
! 16: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
! 17: * GNU General Public License for more details.
! 18: *
! 19: * You should have received a copy of the GNU General Public License along
! 20: * with this program; if not, visit the http://fsf.org website.
! 21: */
! 22:
! 23: #include "rsync.h"
! 24:
! 25: extern int am_root;
! 26: extern int make_backups;
! 27: extern int max_delete;
! 28: extern char *backup_dir;
! 29: extern char *backup_suffix;
! 30: extern int backup_suffix_len;
! 31: extern struct stats stats;
! 32:
! 33: int ignore_perishable = 0;
! 34: int non_perishable_cnt = 0;
! 35: int skipped_deletes = 0;
! 36:
! 37: static inline int is_backup_file(char *fn)
! 38: {
! 39: int k = strlen(fn) - backup_suffix_len;
! 40: return k > 0 && strcmp(fn+k, backup_suffix) == 0;
! 41: }
! 42:
! 43: /* The directory is about to be deleted: if DEL_RECURSE is given, delete all
! 44: * its contents, otherwise just checks for content. Returns DR_SUCCESS or
! 45: * DR_NOT_EMPTY. Note that fname must point to a MAXPATHLEN buffer! (The
! 46: * buffer is used for recursion, but returned unchanged.)
! 47: */
! 48: static enum delret delete_dir_contents(char *fname, uint16 flags)
! 49: {
! 50: struct file_list *dirlist;
! 51: enum delret ret;
! 52: unsigned remainder;
! 53: void *save_filters;
! 54: int j, dlen;
! 55: char *p;
! 56:
! 57: if (DEBUG_GTE(DEL, 3)) {
! 58: rprintf(FINFO, "delete_dir_contents(%s) flags=%d\n",
! 59: fname, flags);
! 60: }
! 61:
! 62: dlen = strlen(fname);
! 63: save_filters = push_local_filters(fname, dlen);
! 64:
! 65: non_perishable_cnt = 0;
! 66: dirlist = get_dirlist(fname, dlen, 0);
! 67: ret = non_perishable_cnt ? DR_NOT_EMPTY : DR_SUCCESS;
! 68:
! 69: if (!dirlist->used)
! 70: goto done;
! 71:
! 72: if (!(flags & DEL_RECURSE)) {
! 73: ret = DR_NOT_EMPTY;
! 74: goto done;
! 75: }
! 76:
! 77: p = fname + dlen;
! 78: if (dlen != 1 || *fname != '/')
! 79: *p++ = '/';
! 80: remainder = MAXPATHLEN - (p - fname);
! 81:
! 82: /* We do our own recursion, so make delete_item() non-recursive. */
! 83: flags = (flags & ~(DEL_RECURSE|DEL_MAKE_ROOM|DEL_NO_UID_WRITE))
! 84: | DEL_DIR_IS_EMPTY;
! 85:
! 86: for (j = dirlist->used; j--; ) {
! 87: struct file_struct *fp = dirlist->files[j];
! 88:
! 89: if (fp->flags & FLAG_MOUNT_DIR && S_ISDIR(fp->mode)) {
! 90: if (DEBUG_GTE(DEL, 1)) {
! 91: rprintf(FINFO,
! 92: "mount point, %s, pins parent directory\n",
! 93: f_name(fp, NULL));
! 94: }
! 95: ret = DR_NOT_EMPTY;
! 96: continue;
! 97: }
! 98:
! 99: strlcpy(p, fp->basename, remainder);
! 100: if (!(fp->mode & S_IWUSR) && !am_root && fp->flags & FLAG_OWNED_BY_US)
! 101: do_chmod(fname, fp->mode | S_IWUSR);
! 102: /* Save stack by recursing to ourself directly. */
! 103: if (S_ISDIR(fp->mode)) {
! 104: if (delete_dir_contents(fname, flags | DEL_RECURSE) != DR_SUCCESS)
! 105: ret = DR_NOT_EMPTY;
! 106: }
! 107: if (delete_item(fname, fp->mode, flags) != DR_SUCCESS)
! 108: ret = DR_NOT_EMPTY;
! 109: }
! 110:
! 111: fname[dlen] = '\0';
! 112:
! 113: done:
! 114: flist_free(dirlist);
! 115: pop_local_filters(save_filters);
! 116:
! 117: if (ret == DR_NOT_EMPTY) {
! 118: rprintf(FINFO, "cannot delete non-empty directory: %s\n",
! 119: fname);
! 120: }
! 121: return ret;
! 122: }
! 123:
! 124: /* Delete a file or directory. If DEL_RECURSE is set in the flags, this will
! 125: * delete recursively.
! 126: *
! 127: * Note that fbuf must point to a MAXPATHLEN buffer if the mode indicates it's
! 128: * a directory! (The buffer is used for recursion, but returned unchanged.)
! 129: */
! 130: enum delret delete_item(char *fbuf, uint16 mode, uint16 flags)
! 131: {
! 132: enum delret ret;
! 133: char *what;
! 134: int ok;
! 135:
! 136: if (DEBUG_GTE(DEL, 2)) {
! 137: rprintf(FINFO, "delete_item(%s) mode=%o flags=%d\n",
! 138: fbuf, (int)mode, (int)flags);
! 139: }
! 140:
! 141: if (flags & DEL_NO_UID_WRITE)
! 142: do_chmod(fbuf, mode | S_IWUSR);
! 143:
! 144: if (S_ISDIR(mode) && !(flags & DEL_DIR_IS_EMPTY)) {
! 145: /* This only happens on the first call to delete_item() since
! 146: * delete_dir_contents() always calls us w/DEL_DIR_IS_EMPTY. */
! 147: ignore_perishable = 1;
! 148: /* If DEL_RECURSE is not set, this just reports emptiness. */
! 149: ret = delete_dir_contents(fbuf, flags);
! 150: ignore_perishable = 0;
! 151: if (ret == DR_NOT_EMPTY || ret == DR_AT_LIMIT)
! 152: goto check_ret;
! 153: /* OK: try to delete the directory. */
! 154: }
! 155:
! 156: if (!(flags & DEL_MAKE_ROOM) && max_delete >= 0 && stats.deleted_files >= max_delete) {
! 157: skipped_deletes++;
! 158: return DR_AT_LIMIT;
! 159: }
! 160:
! 161: if (S_ISDIR(mode)) {
! 162: what = "rmdir";
! 163: ok = do_rmdir(fbuf) == 0;
! 164: } else {
! 165: if (make_backups > 0 && !(flags & DEL_FOR_BACKUP) && (backup_dir || !is_backup_file(fbuf))) {
! 166: what = "make_backup";
! 167: ok = make_backup(fbuf, True);
! 168: if (ok == 2) {
! 169: what = "unlink";
! 170: ok = robust_unlink(fbuf) == 0;
! 171: }
! 172: } else {
! 173: what = "unlink";
! 174: ok = robust_unlink(fbuf) == 0;
! 175: }
! 176: }
! 177:
! 178: if (ok) {
! 179: if (!(flags & DEL_MAKE_ROOM)) {
! 180: log_delete(fbuf, mode);
! 181: stats.deleted_files++;
! 182: if (S_ISREG(mode)) {
! 183: /* Nothing more to count */
! 184: } else if (S_ISDIR(mode))
! 185: stats.deleted_dirs++;
! 186: #ifdef SUPPORT_LINKS
! 187: else if (S_ISLNK(mode))
! 188: stats.deleted_symlinks++;
! 189: #endif
! 190: else if (IS_DEVICE(mode))
! 191: stats.deleted_symlinks++;
! 192: else
! 193: stats.deleted_specials++;
! 194: }
! 195: ret = DR_SUCCESS;
! 196: } else {
! 197: if (S_ISDIR(mode) && errno == ENOTEMPTY) {
! 198: rprintf(FINFO, "cannot delete non-empty directory: %s\n",
! 199: fbuf);
! 200: ret = DR_NOT_EMPTY;
! 201: } else if (errno != ENOENT) {
! 202: rsyserr(FERROR, errno, "delete_file: %s(%s) failed",
! 203: what, fbuf);
! 204: ret = DR_FAILURE;
! 205: } else
! 206: ret = DR_SUCCESS;
! 207: }
! 208:
! 209: check_ret:
! 210: if (ret != DR_SUCCESS && flags & DEL_MAKE_ROOM) {
! 211: const char *desc;
! 212: switch (flags & DEL_MAKE_ROOM) {
! 213: case DEL_FOR_FILE: desc = "regular file"; break;
! 214: case DEL_FOR_DIR: desc = "directory"; break;
! 215: case DEL_FOR_SYMLINK: desc = "symlink"; break;
! 216: case DEL_FOR_DEVICE: desc = "device file"; break;
! 217: case DEL_FOR_SPECIAL: desc = "special file"; break;
! 218: default: exit_cleanup(RERR_UNSUPPORTED); /* IMPOSSIBLE */
! 219: }
! 220: rprintf(FERROR_XFER, "could not make way for %s %s: %s\n",
! 221: flags & DEL_FOR_BACKUP ? "backup" : "new",
! 222: desc, fbuf);
! 223: }
! 224: return ret;
! 225: }
! 226:
! 227: uint16 get_del_for_flag(uint16 mode)
! 228: {
! 229: if (S_ISREG(mode))
! 230: return DEL_FOR_FILE;
! 231: if (S_ISDIR(mode))
! 232: return DEL_FOR_DIR;
! 233: if (S_ISLNK(mode))
! 234: return DEL_FOR_SYMLINK;
! 235: if (IS_DEVICE(mode))
! 236: return DEL_FOR_DEVICE;
! 237: if (IS_SPECIAL(mode))
! 238: return DEL_FOR_SPECIAL;
! 239: exit_cleanup(RERR_UNSUPPORTED); /* IMPOSSIBLE */
! 240: }
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/icons/cvsweb/back.gif){kind=icon}
Return to delete.c CVS log ![[TXT]](/icons/cvsweb/text.gif){kind=icon}
![[DIR]](/icons/cvsweb/dir.gif){kind=icon}
Up to [ELWIX - Embedded LightWeight unIX -] / embedaddon / rsync