+
+char *
+do_checksum (const char *csumtype, const char *path)
+{
+ /* Make the path relative to /sysroot. */
+ char *buf = sysroot_path (path);
+ if (!buf) {
+ reply_with_perror ("malloc");
+ return NULL;
+ }
+
+ char *r = checksum (csumtype, buf);
+ free (buf);
+ return r;
+}
+
+char *
+do_checksum_device (const char *csumtype, const char *device)
+{
+ return checksum (csumtype, device);
+}
+
+/* Has one FileOut parameter. */
+int
+do_checksums_out (const char *csumtype, const char *dir)
+{
+ struct stat statbuf;
+ int r;
+
+ const char *program = program_of_csum (csumtype);
+ if (program == NULL)
+ return -1;
+
+ char *sysrootdir = sysroot_path (dir);
+ if (!sysrootdir) {
+ reply_with_perror ("malloc");
+ return -1;
+ }
+
+ r = stat (sysrootdir, &statbuf);
+ if (r == -1) {
+ reply_with_perror ("%s", dir);
+ free (sysrootdir);
+ return -1;
+ }
+ if (!S_ISDIR (statbuf.st_mode)) {
+ reply_with_error ("%s: not a directory", dir);
+ free (sysrootdir);
+ return -1;
+ }
+
+ char *cmd;
+ if (asprintf_nowarn (&cmd, "cd %Q && find -type f -print0 | xargs -0 %s",
+ sysrootdir, program) == -1) {
+ reply_with_perror ("asprintf");
+ free (sysrootdir);
+ return -1;
+ }
+ free (sysrootdir);
+
+ if (verbose)
+ fprintf (stderr, "%s\n", cmd);
+
+ FILE *fp = popen (cmd, "r");
+ if (fp == NULL) {
+ reply_with_perror ("%s", cmd);
+ free (cmd);
+ return -1;
+ }
+ free (cmd);
+
+ /* Now we must send the reply message, before the file contents. After
+ * this there is no opportunity in the protocol to send any error
+ * message back. Instead we can only cancel the transfer.
+ */
+ reply (NULL, NULL);
+
+ char str[GUESTFS_MAX_CHUNK_SIZE];
+
+ while ((r = fread (str, 1, GUESTFS_MAX_CHUNK_SIZE, fp)) > 0) {
+ if (send_file_write (str, r) < 0) {
+ pclose (fp);
+ return -1;
+ }
+ }
+
+ if (ferror (fp)) {
+ perror (dir);
+ send_file_end (1); /* Cancel. */
+ pclose (fp);
+ return -1;
+ }
+
+ if (pclose (fp) != 0) {
+ perror (dir);
+ send_file_end (1); /* Cancel. */
+ return -1;
+ }
+
+ if (send_file_end (0)) /* Normal end of file. */
+ return -1;
+
+ return 0;
+}