#include <stdio.h>
#include <stdlib.h>
+#include <inttypes.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>
memset (buf, 0, sizeof buf);
- for (i = 0; i < 32; ++i)
- (void) write (fd, buf, sizeof buf);
+ for (i = 0; i < 32; ++i) {
+ if (write (fd, buf, sizeof buf) != sizeof buf) {
+ reply_with_perror ("write: %s", device);
+ close (fd);
+ return -1;
+ }
+ notify_progress ((uint64_t) i, 32);
+ }
+
+ if (close (fd) == -1) {
+ reply_with_perror ("close: %s", device);
+ return -1;
+ }
+
+ return 0;
+}
- close (fd);
+int
+do_zero_device (const char *device)
+{
+ int64_t ssize = do_blockdev_getsize64 (device);
+ if (ssize == -1)
+ return -1;
+ uint64_t size = (uint64_t) ssize;
+
+ int fd = open (device, O_WRONLY);
+ if (fd == -1) {
+ reply_with_perror ("%s", device);
+ return -1;
+ }
+
+ char buf[1024*1024];
+ memset (buf, 0, sizeof buf);
+
+ uint64_t pos = 0;
+
+ while (pos < size) {
+ uint64_t n64 = size - pos;
+ size_t n;
+ if (n64 > sizeof buf)
+ n = sizeof buf;
+ else
+ n = (size_t) n64; /* safe because of if condition */
+
+ ssize_t r = write (fd, buf, n);
+ if (r == -1) {
+ reply_with_perror ("write: %s (with %" PRId64 " bytes left to write)",
+ device, size);
+ close (fd);
+ return -1;
+ }
+
+ pos += r;
+ notify_progress (pos, size);
+ }
+
+ if (close (fd) == -1) {
+ reply_with_perror ("close: %s", device);
+ return -1;
+ }
return 0;
}