showvars.c

#include <stdio.h>

char evars[20][80]={"SERVER_SOFTWARE", "SERVER_NAME", "SERVER_PROTOCOL",
"SERVER_PORT",
"GATEWAY_INTERFACE", "REQUEST_METHOD",
"PATH_INFO", "PATH_TRANSLATED", "SCRIPT_NAME",
"QUERY_STRING",
"REMOTE_HOST", "REMOTE_ADDR", "REMOTE_USER",
"REMOTE_IDENT",
"AUTH_TYPE", "CONTENT_TYPE", "CONTENT_LENGTH",
"HTTP_ACCEPT", "HTTP_USER_AGENT", "HTTP_REFERER"};


int main(void) {
const numvars=20;
int i;

printf("Content-type: text/plain\n\n");
for (i=0;i<numvars;i++) printf("%s = %s\n", evars[i], getenv(evars[i]));
return 0;
}