1*b1cdbd2cSJim Jagielski /************************************************************** 2*b1cdbd2cSJim Jagielski * 3*b1cdbd2cSJim Jagielski * Licensed to the Apache Software Foundation (ASF) under one 4*b1cdbd2cSJim Jagielski * or more contributor license agreements. See the NOTICE file 5*b1cdbd2cSJim Jagielski * distributed with this work for additional information 6*b1cdbd2cSJim Jagielski * regarding copyright ownership. The ASF licenses this file 7*b1cdbd2cSJim Jagielski * to you under the Apache License, Version 2.0 (the 8*b1cdbd2cSJim Jagielski * "License"); you may not use this file except in compliance 9*b1cdbd2cSJim Jagielski * with the License. You may obtain a copy of the License at 10*b1cdbd2cSJim Jagielski * 11*b1cdbd2cSJim Jagielski * http://www.apache.org/licenses/LICENSE-2.0 12*b1cdbd2cSJim Jagielski * 13*b1cdbd2cSJim Jagielski * Unless required by applicable law or agreed to in writing, 14*b1cdbd2cSJim Jagielski * software distributed under the License is distributed on an 15*b1cdbd2cSJim Jagielski * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 16*b1cdbd2cSJim Jagielski * KIND, either express or implied. See the License for the 17*b1cdbd2cSJim Jagielski * specific language governing permissions and limitations 18*b1cdbd2cSJim Jagielski * under the License. 19*b1cdbd2cSJim Jagielski * 20*b1cdbd2cSJim Jagielski *************************************************************/ 21*b1cdbd2cSJim Jagielski 22*b1cdbd2cSJim Jagielski 23*b1cdbd2cSJim Jagielski 24*b1cdbd2cSJim Jagielski #include <ctype.h> 25*b1cdbd2cSJim Jagielski #include <errno.h> 26*b1cdbd2cSJim Jagielski #include <stdio.h> 27*b1cdbd2cSJim Jagielski #include <stdlib.h> 28*b1cdbd2cSJim Jagielski #include <string.h> 29*b1cdbd2cSJim Jagielski main()30*b1cdbd2cSJim Jagielskiint main() { 31*b1cdbd2cSJim Jagielski for (;;) { 32*b1cdbd2cSJim Jagielski int c; 33*b1cdbd2cSJim Jagielski errno = 0; 34*b1cdbd2cSJim Jagielski c = getchar(); 35*b1cdbd2cSJim Jagielski if (c == EOF) { 36*b1cdbd2cSJim Jagielski exit(errno == 0 ? EXIT_SUCCESS : EXIT_FAILURE); 37*b1cdbd2cSJim Jagielski } else if (isalnum(c) || strchr("!$'()*+,-.:=@_~/\n", c) != NULL) { 38*b1cdbd2cSJim Jagielski /* valid RFC 2396 pchar characters + '/' + newline */ 39*b1cdbd2cSJim Jagielski if (putchar(c) == EOF) { 40*b1cdbd2cSJim Jagielski exit(EXIT_FAILURE); 41*b1cdbd2cSJim Jagielski } 42*b1cdbd2cSJim Jagielski } else if (printf("%%%02X", (unsigned char) (char) c) < 0) { 43*b1cdbd2cSJim Jagielski exit(EXIT_FAILURE); 44*b1cdbd2cSJim Jagielski } 45*b1cdbd2cSJim Jagielski } 46*b1cdbd2cSJim Jagielski } 47