#include "util.h"
#include "copy.h"
-int copy_bytes(int fdf, int fdt) {
+int copy_bytes(int fdf, int fdt, off_t max_bytes) {
assert(fdf >= 0);
assert(fdt >= 0);
for (;;) {
char buf[PIPE_BUF];
ssize_t n, k;
+ size_t m = sizeof(buf);
- n = read(fdf, buf, sizeof(buf));
+ if (max_bytes != (off_t) -1) {
+
+ if (max_bytes <= 0)
+ return -E2BIG;
+
+ if ((off_t) m > max_bytes)
+ m = (size_t) max_bytes;
+ }
+
+ n = read(fdf, buf, m);
if (n < 0)
return -errno;
if (n == 0)
return k;
if (k != n)
return errno ? -errno : -EIO;
+
+ if (max_bytes != (off_t) -1) {
+ assert(max_bytes >= n);
+ max_bytes -= n;
+ }
}
return 0;
if (fdt < 0)
return -errno;
- r = copy_bytes(fdf, fdt);
+ r = copy_bytes(fdf, fdt, (off_t) -1);
if (r < 0) {
unlinkat(dt, to, 0);
return r;
if (fdt < 0)
return -errno;
+ r = 0;
+
if (created) {
if (fchown(fdt, st->st_uid, st->st_gid) < 0)
r = -errno;
r = -errno;
}
- r = 0;
FOREACH_DIRENT(de, d, return -errno) {
struct stat buf;
int q;
if (fdt < 0)
return -errno;
- r = copy_bytes(fdf, fdt);
+ r = copy_bytes(fdf, fdt, (off_t) -1);
if (r < 0) {
unlink(to);
return r;