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- /*
- Copyright (C) Andrew Tridgell 1996
- Copyright (C) Paul Mackerras 1996
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
- #include "rsync.h"
-
- extern int am_server;
- extern int dry_run;
-
- #if SUPPORT_HARD_LINKS
- static int hlink_compare(struct file_struct *f1,struct file_struct *f2)
- {
- if (!S_ISREG(f1->mode) && !S_ISREG(f2->mode)) return 0;
- if (!S_ISREG(f1->mode)) return -1;
- if (!S_ISREG(f2->mode)) return 1;
-
- if (f1->dev != f2->dev)
- return (f1->dev - f2->dev);
-
- if (f1->inode != f2->inode)
- return (f1->inode - f2->inode);
-
- return file_compare(f1,f2);
- }
-
-
- static struct file_struct *hlink_list = NULL;
- static int hlink_count=0;
- #endif
-
- void init_hard_links(struct file_list *flist)
- {
- #if SUPPORT_HARD_LINKS
- if (flist->count < 2) return;
-
- if (hlink_list) free(hlink_list);
-
- if (!(hlink_list =
- (struct file_struct *)malloc(sizeof(hlink_list[0])*flist->count)))
- out_of_memory("init_hard_links");
-
- bcopy((char *)flist->files,
- (char *)hlink_list,
- sizeof(hlink_list[0])*flist->count);
-
- qsort(hlink_list,flist->count,
- sizeof(hlink_list[0]),
- (int (*)())hlink_compare);
-
- hlink_count=flist->count;
- #endif
- }
-
- /* check if a file should be skipped because it is the same as an
- earlier hard link */
- int check_hard_link(struct file_struct *file)
- {
- #if SUPPORT_HARD_LINKS
- int low=0,high=hlink_count;
- int mid=0,ret=0;
-
- if (!hlink_list || !S_ISREG(file->mode)) return 0;
-
- while (low != high) {
- mid = (low+high)/2;
- ret = hlink_compare(&hlink_list[mid],file);
- if (ret == 0) break;
- if (ret > 0)
- high=mid;
- else
- low=mid+1;
- }
-
- if (hlink_compare(&hlink_list[mid],file) != 0) return 0;
-
- if (mid > 0 &&
- S_ISREG(hlink_list[mid-1].mode) &&
- file->dev == hlink_list[mid-1].dev &&
- file->inode == hlink_list[mid-1].inode)
- return 1;
- #endif
-
- return 0;
- }
-
-
- /* create any hard links in the flist */
- void do_hard_links(struct file_list *flist)
- {
- #if SUPPORT_HARD_LINKS
- int i;
-
- if (!hlink_list) return;
-
- for (i=1;i<hlink_count;i++) {
- if (S_ISREG(hlink_list[i].mode) &&
- S_ISREG(hlink_list[i-1].mode) &&
- hlink_list[i].name && hlink_list[i-1].name &&
- hlink_list[i].dev == hlink_list[i-1].dev &&
- hlink_list[i].inode == hlink_list[i-1].inode) {
- struct stat st1,st2;
-
- if (lstat(hlink_list[i-1].name,&st1) != 0) continue;
- if (lstat(hlink_list[i].name,&st2) != 0) {
- if (!dry_run && link(hlink_list[i-1].name,hlink_list[i].name) != 0) {
- fprintf(FINFO,"link %s => %s : %s\n",
- hlink_list[i].name,hlink_list[i-1].name,strerror(errno));
- continue;
- }
- } else {
- if (st2.st_dev == st1.st_dev && st2.st_ino == st1.st_ino) continue;
-
- if (!dry_run && (unlink(hlink_list[i].name) != 0 ||
- link(hlink_list[i-1].name,hlink_list[i].name) != 0)) {
- fprintf(FINFO,"link %s => %s : %s\n",
- hlink_list[i].name,hlink_list[i-1].name,strerror(errno));
- continue;
- }
- }
- fprintf(FINFO,"%s => %s\n",
- hlink_list[i].name,hlink_list[i-1].name);
- }
- }
- #endif
- }
-