+int rotate_serial(char *serialfile, char *new_suffix, char *old_suffix)
+ {
+ char buf[5][BSIZE];
+ int i,j;
+ struct stat sb;
+
+ i = strlen(serialfile) + strlen(old_suffix);
+ j = strlen(serialfile) + strlen(new_suffix);
+ if (i > j) j = i;
+ if (j + 1 >= BSIZE)
+ {
+ BIO_printf(bio_err,"file name too long\n");
+ goto err;
+ }
+
+#ifndef OPENSSL_SYS_VMS
+ j = BIO_snprintf(buf[0], sizeof buf[0], "%s.%s",
+ serialfile, new_suffix);
+#else
+ j = BIO_snprintf(buf[0], sizeof buf[0], "%s-%s",
+ serialfile, new_suffix);
+#endif
+#ifndef OPENSSL_SYS_VMS
+ j = BIO_snprintf(buf[1], sizeof buf[1], "%s.%s",
+ serialfile, old_suffix);
+#else
+ j = BIO_snprintf(buf[1], sizeof buf[1], "%s-%s",
+ serialfile, old_suffix);
+#endif
+ if (stat(serialfile,&sb) < 0)
+ {
+ if (errno != ENOENT
+#ifdef ENOTDIR
+ && errno != ENOTDIR)
+#endif
+ goto err;
+ }
+ else
+ {
+#ifdef RL_DEBUG
+ BIO_printf(bio_err, "DEBUG: renaming \"%s\" to \"%s\"\n",
+ serialfile, buf[1]);
+#endif
+ if (rename(serialfile,buf[1]) < 0)
+ {
+ BIO_printf(bio_err,
+ "unable to rename %s to %s\n",
+ serialfile, buf[1]);
+ perror("reason");
+ goto err;
+ }
+ }
+#ifdef RL_DEBUG
+ BIO_printf(bio_err, "DEBUG: renaming \"%s\" to \"%s\"\n",
+ buf[0],serialfile);
+#endif
+ if (rename(buf[0],serialfile) < 0)
+ {
+ BIO_printf(bio_err,
+ "unable to rename %s to %s\n",
+ buf[0],serialfile);
+ perror("reason");
+ rename(buf[1],serialfile);
+ goto err;
+ }
+ return 1;
+ err:
+ return 0;
+ }
+