shell/source/unix/misc/uri-encode.c

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  30
  31 #include <ctype.h>
  32 #include <errno.h>
  33 #include <stdio.h>
  34 #include <stdlib.h>
  35 #include <string.h>
  36
  37 int main() {
  38     for (;;) {
  39         int c;
  40         errno = 0;
  41         c = getchar();
  42         if (c == EOF) {
  43             exit(errno == 0 ? EXIT_SUCCESS : EXIT_FAILURE);
  44         } else if (isalnum(c) || strchr("!$'()*+,-.:=@_~/\n", c) != NULL) {
  45             /* valid RFC 2396 pchar characters + '/' + newline */
  46             if (putchar(c) == EOF) {
  47                 exit(EXIT_FAILURE);
  48             }
  49         } else if (printf("%%%02X", (unsigned char) (char) c) < 0) {
  50             exit(EXIT_FAILURE);
  51         }
  52     }
  53 }