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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.
*/
/* this file contains code used by more than one part of the rsync
process */
#include "rsync.h"
extern int verbose;
extern int dry_run;
extern int preserve_times;
extern int am_root;
extern int preserve_uid;
extern int preserve_gid;
extern int preserve_perms;
extern int make_backups;
extern char *backup_suffix;
/*
free a sums struct
*/
void free_sums(struct sum_struct *s)
{
if (s->sums) free(s->sums);
free(s);
}
/*
* delete a file or directory. If force_delet is set then delete
* recursively
*/
int delete_file(char *fname)
{
DIR *d;
struct dirent *di;
char buf[MAXPATHLEN];
extern int force_delete;
STRUCT_STAT st;
int ret;
extern int recurse;
if (do_unlink(fname) == 0 || errno == ENOENT) return 0;
#if SUPPORT_LINKS
ret = do_lstat(fname, &st);
#else
ret = do_stat(fname, &st);
#endif
if (ret) {
rprintf(FERROR,"stat(%s) : %s\n", fname, strerror(errno));
return -1;
}
if (!S_ISDIR(st.st_mode)) {
rprintf(FERROR,"unlink(%s) : %s\n", fname, strerror(errno));
return -1;
}
if (do_rmdir(fname) == 0 || errno == ENOENT) return 0;
if (!force_delete || !recurse ||
(errno != ENOTEMPTY && errno != EEXIST)) {
rprintf(FERROR,"rmdir(%s) : %s\n", fname, strerror(errno));
return -1;
}
/* now we do a recsursive delete on the directory ... */
d = opendir(fname);
if (!d) {
rprintf(FERROR,"opendir(%s): %s\n",
fname,strerror(errno));
return -1;
}
for (di=readdir(d); di; di=readdir(d)) {
char *dname = d_name(di);
if (strcmp(dname,".")==0 ||
strcmp(dname,"..")==0)
continue;
slprintf(buf, sizeof(buf), "%s/%s", fname, dname);
if (verbose > 0)
rprintf(FINFO,"deleting %s\n", buf);
if (delete_file(buf) != 0) {
closedir(d);
return -1;
}
}
closedir(d);
if (do_rmdir(fname) != 0) {
rprintf(FERROR,"rmdir(%s) : %s\n", fname, strerror(errno));
return -1;
}
return 0;
}
int set_perms(char *fname,struct file_struct *file,STRUCT_STAT *st,
int report)
{
int updated = 0;
STRUCT_STAT st2;
extern int am_daemon;
if (dry_run) return 0;
if (!st) {
if (link_stat(fname,&st2) != 0) {
rprintf(FERROR,"stat %s : %s\n",fname,strerror(errno));
return 0;
}
st = &st2;
}
if (preserve_times && !S_ISLNK(st->st_mode) &&
st->st_mtime != file->modtime) {
/* don't complain about not setting times on directories
because some filesystems can't do it */
if (set_modtime(fname,file->modtime) != 0 &&
!S_ISDIR(st->st_mode)) {
rprintf(FERROR,"failed to set times on %s : %s\n",
fname,strerror(errno));
return 0;
} else {
updated = 1;
}
}
if ((am_root || !am_daemon) &&
((am_root && preserve_uid && st->st_uid != file->uid) ||
(preserve_gid && st->st_gid != file->gid))) {
if (do_lchown(fname,
(am_root&&preserve_uid)?file->uid:-1,
preserve_gid?file->gid:-1) != 0) {
if (preserve_uid && st->st_uid != file->uid)
updated = 1;
if (verbose>1 || preserve_uid) {
rprintf(FERROR,"chown %s : %s\n",
fname,strerror(errno));
return 0;
}
} else {
updated = 1;
}
}
#ifdef HAVE_CHMOD
if (preserve_perms && !S_ISLNK(st->st_mode) &&
(st->st_mode != file->mode ||
(updated && (file->mode & ~ACCESSPERMS)))) {
updated = 1;
if (do_chmod(fname,file->mode) != 0) {
rprintf(FERROR,"failed to set permissions on %s : %s\n",
fname,strerror(errno));
return 0;
}
}
#endif
if (verbose > 1 && report) {
if (updated)
rprintf(FINFO,"%s\n",fname);
else
rprintf(FINFO,"%s is uptodate\n",fname);
}
return updated;
}
void sig_int(void)
{
exit_cleanup(RERR_SIGNAL);
}
int make_backup(char *fname)
{
char fnamebak[MAXPATHLEN];
if (strlen(fname) + strlen(backup_suffix) > (MAXPATHLEN-1)) {
rprintf(FERROR,"backup filename too long\n");
return 0;
}
slprintf(fnamebak,sizeof(fnamebak),"%s%s",fname,backup_suffix);
if (do_rename(fname,fnamebak) != 0) {
if (errno != ENOENT) {
rprintf(FERROR,"rename %s %s : %s\n",fname,fnamebak,strerror(errno));
return 0;
}
} else if (verbose > 1) {
rprintf(FINFO,"backed up %s to %s\n",fname,fnamebak);
}
return 1;
}
/* finish off a file transfer, renaming the file and setting the permissions
and ownership */
void finish_transfer(char *fname, char *fnametmp, struct file_struct *file)
{
if (make_backups && !make_backup(fname))
return;
/* move tmp file over real file */
if (do_rename(fnametmp,fname) != 0) {
if (errno == EXDEV) {
/* rename failed on cross-filesystem link.
Copy the file instead. */
if (copy_file(fnametmp,fname, file->mode & ACCESSPERMS)) {
rprintf(FERROR,"copy %s -> %s : %s\n",
fnametmp,fname,strerror(errno));
} else {
set_perms(fname,file,NULL,0);
}
do_unlink(fnametmp);
} else {
rprintf(FERROR,"rename %s -> %s : %s\n",
fnametmp,fname,strerror(errno));
do_unlink(fnametmp);
}
} else {
set_perms(fname,file,NULL,0);
}
}
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