From 4aca87515a5083ae0e31ce3177189fd43b6d05ac Mon Sep 17 00:00:00 2001
From: Andreas Baumann <mail@andreasbaumann.cc>
Date: Sat, 3 Jan 2015 13:58:15 +0100
Subject: patch to Vanilla Tomato 1.28

---
 .../src/router/busybox/networking/httpd_indexcgi.c | 342 +++++++++++++++++++++
 1 file changed, 342 insertions(+)
 create mode 100644 release/src/router/busybox/networking/httpd_indexcgi.c

(limited to 'release/src/router/busybox/networking/httpd_indexcgi.c')

diff --git a/release/src/router/busybox/networking/httpd_indexcgi.c b/release/src/router/busybox/networking/httpd_indexcgi.c
new file mode 100644
index 00000000..94c6a692
--- /dev/null
+++ b/release/src/router/busybox/networking/httpd_indexcgi.c
@@ -0,0 +1,342 @@
+/*
+ * Copyright (c) 2007 Denys Vlasenko <vda.linux@googlemail.com>
+ *
+ * Licensed under GPLv2, see file LICENSE in this tarball for details.
+ */
+
+/*
+ * This program is a CGI application. It outputs directory index page.
+ * Put it into cgi-bin/index.cgi and chmod 0755.
+ */
+
+/* Build a-la
+i486-linux-uclibc-gcc \
+-static -static-libgcc \
+-D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 \
+-Wall -Wshadow -Wwrite-strings -Wundef -Wstrict-prototypes -Werror \
+-Wold-style-definition -Wdeclaration-after-statement -Wno-pointer-sign \
+-Wmissing-prototypes -Wmissing-declarations \
+-Os -fno-builtin-strlen -finline-limit=0 -fomit-frame-pointer \
+-ffunction-sections -fdata-sections -fno-guess-branch-probability \
+-funsigned-char \
+-falign-functions=1 -falign-jumps=1 -falign-labels=1 -falign-loops=1 \
+-march=i386 -mpreferred-stack-boundary=2 \
+-Wl,-Map -Wl,link.map -Wl,--warn-common -Wl,--sort-common -Wl,--gc-sections \
+httpd_indexcgi.c -o index.cgi
+*/
+
+/* We don't use printf, as it pulls in >12 kb of code from uclibc (i386). */
+/* Currently malloc machinery is the biggest part of libc we pull in. */
+/* We have only one realloc and one strdup, any idea how to do without? */
+/* Size (i386, approximate):
+ *   text    data     bss     dec     hex filename
+ *  13036      44    3052   16132    3f04 index.cgi
+ *   2576       4    2048    4628    1214 index.cgi.o
+ */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <errno.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <dirent.h>
+#include <time.h>
+
+/* Appearance of the table is controlled by style sheet *ONLY*,
+ * formatting code uses <TAG class=CLASS> to apply style
+ * to elements. Edit stylesheet to your liking and recompile. */
+
+#define STYLE_STR \
+"<style>"                                               "\n"\
+"table {"                                               "\n"\
+  "width:100%;"                                         "\n"\
+  "background-color:#fff5ee;"                           "\n"\
+  "border-width:1px;" /* 1px 1px 1px 1px; */            "\n"\
+  "border-spacing:2px;"                                 "\n"\
+  "border-style:solid;" /* solid solid solid solid; */  "\n"\
+  "border-color:black;" /* black black black black; */  "\n"\
+  "border-collapse:collapse;"                           "\n"\
+"}"                                                     "\n"\
+"th {"                                                  "\n"\
+  "border-width:1px;" /* 1px 1px 1px 1px; */            "\n"\
+  "padding:1px;" /* 1px 1px 1px 1px; */                 "\n"\
+  "border-style:solid;" /* solid solid solid solid; */  "\n"\
+  "border-color:black;" /* black black black black; */  "\n"\
+"}"                                                     "\n"\
+"td {"                                                  "\n"\
+             /* top right bottom left */                    \
+  "border-width:0px 1px 0px 1px;"                       "\n"\
+  "padding:1px;" /* 1px 1px 1px 1px; */                 "\n"\
+  "border-style:solid;" /* solid solid solid solid; */  "\n"\
+  "border-color:black;" /* black black black black; */  "\n"\
+  "white-space:nowrap;"                                 "\n"\
+"}"                                                     "\n"\
+"tr.hdr { background-color:#eee5de; }"                  "\n"\
+"tr.o { background-color:#ffffff; }"                    "\n"\
+/* tr.e { ... } - for even rows (currently none) */         \
+"tr.foot { background-color:#eee5de; }"                 "\n"\
+"th.cnt { text-align:left; }"                           "\n"\
+"th.sz { text-align:right; }"                           "\n"\
+"th.dt { text-align:right; }"                           "\n"\
+"td.sz { text-align:right; }"                           "\n"\
+"td.dt { text-align:right; }"                           "\n"\
+"col.nm { width:98%; }"                                 "\n"\
+"col.sz { width:1%; }"                                  "\n"\
+"col.dt { width:1%; }"                                  "\n"\
+"</style>"                                              "\n"\
+
+typedef struct dir_list_t {
+	char  *dl_name;
+	mode_t dl_mode;
+	off_t  dl_size;
+	time_t dl_mtime;
+} dir_list_t;
+
+static int compare_dl(dir_list_t *a, dir_list_t *b)
+{
+	/* ".." is 'less than' any other dir entry */
+	if (strcmp(a->dl_name, "..") == 0) {
+		return -1;
+	}
+	if (strcmp(b->dl_name, "..") == 0) {
+		return 1;
+	}
+	if (S_ISDIR(a->dl_mode) != S_ISDIR(b->dl_mode)) {
+		/* 1 if b is a dir (and thus a is 'after' b, a > b),
+		 * else -1 (a < b) */
+		return (S_ISDIR(b->dl_mode) != 0) ? 1 : -1;
+	}
+	return strcmp(a->dl_name, b->dl_name);
+}
+
+static char buffer[2*1024 > sizeof(STYLE_STR) ? 2*1024 : sizeof(STYLE_STR)];
+static char *dst = buffer;
+enum {
+	BUFFER_SIZE = sizeof(buffer),
+	HEADROOM = 64,
+};
+
+/* After this call, you have at least size + HEADROOM bytes available
+ * ahead of dst */
+static void guarantee(int size)
+{
+	if (buffer + (BUFFER_SIZE-HEADROOM) - dst >= size)
+		return;
+	write(STDOUT_FILENO, buffer, dst - buffer);
+	dst = buffer;
+}
+
+/* NB: formatters do not store terminating NUL! */
+
+/* HEADROOM bytes are available after dst after this call */
+static void fmt_str(/*char *dst,*/ const char *src)
+{
+	unsigned len = strlen(src);
+	guarantee(len);
+	memcpy(dst, src, len);
+	dst += len;
+}
+
+/* HEADROOM bytes after dst are available after this call */
+static void fmt_url(/*char *dst,*/ const char *name)
+{
+	while (*name) {
+		unsigned c = *name++;
+		guarantee(3);
+		*dst = c;
+		if ((c - '0') > 9 /* not a digit */
+		 && ((c|0x20) - 'a') > 26 /* not A-Z or a-z */
+		 && !strchr("._-+@", c)
+		) {
+			*dst++ = '%';
+			*dst++ = "0123456789ABCDEF"[c >> 4];
+			*dst = "0123456789ABCDEF"[c & 0xf];
+		}
+		dst++;
+	}
+}
+
+/* HEADROOM bytes are available after dst after this call */
+static void fmt_html(/*char *dst,*/ const char *name)
+{
+	while (*name) {
+		char c = *name++;
+		if (c == '<')
+			fmt_str("&lt;");
+		else if (c == '>')
+			fmt_str("&gt;");
+		else if (c == '&') {
+			fmt_str("&amp;");
+		} else {
+			guarantee(1);
+			*dst++ = c;
+			continue;
+		}
+	}
+}
+
+/* HEADROOM bytes are available after dst after this call */
+static void fmt_ull(/*char *dst,*/ unsigned long long n)
+{
+	char buf[sizeof(n)*3 + 2];
+	char *p;
+
+	p = buf + sizeof(buf) - 1;
+	*p = '\0';
+	do {
+		*--p = (n % 10) + '0';
+		n /= 10;
+	} while (n);
+	fmt_str(/*dst,*/ p);
+}
+
+/* Does not call guarantee - eats into headroom instead */
+static void fmt_02u(/*char *dst,*/ unsigned n)
+{
+	/* n %= 100; - not needed, callers don't pass big n */
+	dst[0] = (n / 10) + '0';
+	dst[1] = (n % 10) + '0';
+	dst += 2;
+}
+
+/* Does not call guarantee - eats into headroom instead */
+static void fmt_04u(/*char *dst,*/ unsigned n)
+{
+	/* n %= 10000; - not needed, callers don't pass big n */
+	fmt_02u(n / 100);
+	fmt_02u(n % 100);
+}
+
+int main(void)
+{
+	dir_list_t *dir_list;
+	dir_list_t *cdir;
+	unsigned dir_list_count;
+	unsigned count_dirs;
+	unsigned count_files;
+	unsigned long long size_total;
+	int odd;
+	DIR *dirp;
+	char *QUERY_STRING;
+
+	QUERY_STRING = getenv("QUERY_STRING");
+	if (!QUERY_STRING
+	 || QUERY_STRING[0] != '/'
+	 || strstr(QUERY_STRING, "/../")
+	 || strcmp(strrchr(QUERY_STRING, '/'), "/..") == 0
+	) {
+		return 1;
+	}
+
+	if (chdir("..")
+	 || (QUERY_STRING[1] && chdir(QUERY_STRING + 1))
+	) {
+		return 1;
+	}
+
+	dirp = opendir(".");
+	if (!dirp)
+		return 1;
+	dir_list = NULL;
+	dir_list_count = 0;
+	while (1) {
+		struct dirent *dp;
+		struct stat sb;
+
+		dp = readdir(dirp);
+		if (!dp)
+			break;
+		if (dp->d_name[0] == '.' && !dp->d_name[1])
+			continue;
+		if (stat(dp->d_name, &sb) != 0)
+			continue;
+		dir_list = realloc(dir_list, (dir_list_count + 1) * sizeof(dir_list[0]));
+		dir_list[dir_list_count].dl_name = strdup(dp->d_name);
+		dir_list[dir_list_count].dl_mode = sb.st_mode;
+		dir_list[dir_list_count].dl_size = sb.st_size;
+		dir_list[dir_list_count].dl_mtime = sb.st_mtime;
+		dir_list_count++;
+	}
+	closedir(dirp);
+
+	qsort(dir_list, dir_list_count, sizeof(dir_list[0]), (void*)compare_dl);
+
+	fmt_str(
+		"" /* Additional headers (currently none) */
+		"\r\n" /* Mandatory empty line after headers */
+		"<html><head><title>Index of ");
+	/* Guard against directories with &, > etc */
+	fmt_html(QUERY_STRING);
+	fmt_str(
+		"</title>\n"
+		STYLE_STR
+		"</head>" "\n"
+		"<body>" "\n"
+		"<h1>Index of ");
+	fmt_html(QUERY_STRING);
+	fmt_str(
+		"</h1>" "\n"
+		"<table>" "\n"
+		"<col class=nm><col class=sz><col class=dt>" "\n"
+		"<tr class=hdr><th class=cnt>Name<th class=sz>Size<th class=dt>Last modified" "\n");
+
+	odd = 0;
+	count_dirs = 0;
+	count_files = 0;
+	size_total = 0;
+	cdir = dir_list;
+	while (dir_list_count--) {
+		struct tm *tm;
+
+		if (S_ISDIR(cdir->dl_mode)) {
+			count_dirs++;
+		} else if (S_ISREG(cdir->dl_mode)) {
+			count_files++;
+			size_total += cdir->dl_size;
+		} else
+			goto next;
+
+		fmt_str("<tr class=");
+		*dst++ = (odd ? 'o' : 'e');
+		fmt_str("><td class=nm><a href='");
+		fmt_url(cdir->dl_name); /* %20 etc */
+		if (S_ISDIR(cdir->dl_mode))
+			*dst++ = '/';
+		fmt_str("'>");
+		fmt_html(cdir->dl_name); /* &lt; etc */
+		if (S_ISDIR(cdir->dl_mode))
+			*dst++ = '/';
+		fmt_str("</a><td class=sz>");
+		if (S_ISREG(cdir->dl_mode))
+			fmt_ull(cdir->dl_size);
+		fmt_str("<td class=dt>");
+		tm = gmtime(&cdir->dl_mtime);
+		fmt_04u(1900 + tm->tm_year); *dst++ = '-';
+		fmt_02u(tm->tm_mon + 1); *dst++ = '-';
+		fmt_02u(tm->tm_mday); *dst++ = ' ';
+		fmt_02u(tm->tm_hour); *dst++ = ':';
+		fmt_02u(tm->tm_min); *dst++ = ':';
+		fmt_02u(tm->tm_sec);
+		*dst++ = '\n';
+
+		odd = 1 - odd;
+ next:
+		cdir++;
+	}
+
+	fmt_str("<tr class=foot><th class=cnt>Files: ");
+	fmt_ull(count_files);
+	/* count_dirs - 1: we don't want to count ".." */
+	fmt_str(", directories: ");
+	fmt_ull(count_dirs - 1);
+	fmt_str("<th class=sz>");
+	fmt_ull(size_total);
+	fmt_str("<th class=dt>\n");
+	/* "</table></body></html>" - why bother? */
+	guarantee(BUFFER_SIZE * 2); /* flush */
+
+	return 0;
+}
-- 
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