+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/dir.h>
+
+struct Directory {
+ struct dirent **items;
+ int num;
+};
+
+void
+err(int code, char *msg)
+{
+ printf("Status: %d\n", code);
+ printf("Content-Type: text/plain\n\n");
+ printf("%s", msg);
+ exit(code);
+}
+
+struct Directory
+get_files(char *dirname) {
+ struct Directory outp;
+ outp.items = calloc(1, sizeof(struct dirent **));
+
+ DIR *d;
+ struct dirent *dir;
+ d = opendir(dirname);
+
+ if (!d) {
+ err(500, "ERROR: Could not open directory.\n");
+ }
+
+ outp.num = 0;
+ while ((dir = readdir(d)) != NULL) {
+ outp.items = realloc(outp.items, (outp.num + 1) * sizeof(struct dirent **));
+ outp.items[outp.num] = dir;
+ outp.num++;
+ }
+
+ closedir(d);
+ return outp;
+}
+
+int
+main(void) {
+ char *url = getenv("PATH_INFO");
+
+ if (!url) {
+ err(404, "ERROR: No path given.\n");
+ return 1;
+ }
+
+ int len = strlen(url) + 2;
+ char *path = malloc(len);
+ snprintf(path, len, ".%s", url);
+ struct Directory files = get_files(path);
+ free(path);
+
+ printf("Content-Type: text/html\n\n");
+ printf("<!DOCTYPE html><html lang=\"en\"><head>");
+ printf("</head><body>");
+ printf("<p>%d files found.</p>\n", files.num);
+ printf("<table>");
+ for (int i = 0; i < files.num; i++) {
+ printf("<tr>\n<td>");
+ printf("<a href=\"%s\">%s</p>\n", files.items[i]->d_name,
+ files.items[i]->d_name);
+ printf("</td>\n</tr>");
+ }
+ printf("</table>\n");
+ printf("</body></html>");
+ return 0;
+}