/**
* copy a directory between branches (includes all contents of the directory)
*/
int copy_directory(const char *path, int branch_ro, int branch_rw) {
DBG("%s\n", path);
/* create the directory on the destination branch */
int res = path_create(path, branch_ro, branch_rw);
if (res != 0) {
RETURN(res);
}
/* determine path to source directory on read-only branch */
char from[PATHLEN_MAX];
if (BUILD_PATH(from, uopt.branches[branch_ro].path, path)) RETURN(1);
DIR *dp = opendir(from);
if (dp == NULL) RETURN(1);
struct dirent *de;
while ((de = readdir(dp)) != NULL) {
if (strcmp(de->d_name, ".") == 0 || strcmp(de->d_name, "..") == 0) continue;
char member[PATHLEN_MAX];
if (BUILD_PATH(member, path, "/", de->d_name)) {
res = 1;
break;
}
res = cow_cp(member, branch_ro, branch_rw, true);
if (res != 0) break;
}
closedir(dp);
struct stat buf;
lstat(from, &buf);
setfile(from, &buf);
RETURN(res);
}
/**
* copy a directory between branches (includes all contents of the directory)
*/
int copy_directory(const char *path, int branch_ro, int branch_rw) {
DBG_IN();
/* create the directory on the destination branch */
int res = path_create(path, branch_ro, branch_rw);
if (res != 0) {
return res;
}
/* determine path to source directory on read-only branch */
char from[PATHLEN_MAX];
if (BUILD_PATH(from, uopt.branches[branch_ro].path, path)) return 1;
DIR *dp = opendir(from);
if (dp == NULL) return 1;
struct dirent *de;
while ((de = readdir(dp)) != NULL) {
if (strcmp(de->d_name, ".") == 0 || strcmp(de->d_name, "..") == 0) continue;
char member[PATHLEN_MAX];
if (BUILD_PATH(member, path, de->d_name)) return 1;
res = cow_cp(member, branch_ro, branch_rw);
if (res != 0) return res;
}
closedir(dp);
return 0;
}
/**
* copy-one-write
* Find path in a union branch and if this branch is read-only,
* copy the file to a read-write branch.
*/
int find_rw_root_cow(const char *path) {
int root_rorw = find_rorw_root(path);
// not found anywhere
if (root_rorw < 0) return -1;
// the found root is writable, good!
if (uopt.roots[root_rorw].rw) return root_rorw;
// cow is disabled, return whatever was found
if (!uopt.cow_enabled) return root_rorw;
int root_rw = find_lowest_rw_root(root_rorw);
if (root_rw < 0) {
// no writable root found
errno = EACCES;
return -1;
}
if (cow_cp(path, root_rorw, root_rw)) return -1;
// remove a file that might hide the copied file
remove_hidden(path, root_rw);
return root_rw;
}
