From 5d148e2646874a6f460402f2dd70ea2fb6be08dd Mon Sep 17 00:00:00 2001
From: Denis Vlasenko <vda.linux@googlemail.com>
Date: Tue, 21 Nov 2006 00:12:09 +0000
Subject: [PATCH] httpd: fix cgi-bin/index.cgi support, add example of it,
 stat: fix end-of-line if format is specified (wasn't printing it),       fix
 %z (time) format to match coreutils 6.3

---
 coreutils/stat.c                   | 68 ++++++++++++++++--------------
 networking/httpd.c                 | 27 ++++++++----
 networking/httpd_index_cgi_example | 55 ++++++++++++++++++++++++
 3 files changed, 111 insertions(+), 39 deletions(-)
 create mode 100644 networking/httpd_index_cgi_example

diff --git a/coreutils/stat.c b/coreutils/stat.c
index b9fd42f4a..31dd6624e 100644
--- a/coreutils/stat.c
+++ b/coreutils/stat.c
@@ -44,10 +44,16 @@ static char const *file_type(struct stat const *st)
 
 static char const *human_time(time_t t)
 {
+	/* Old
 	static char *str;
 	str = ctime(&t);
 	str[strlen(str)-1] = '\0';
 	return str;
+	*/
+	/* coreutils 6.3 compat: */
+	static char buf[sizeof("YYYY-MM-DD HH:MM:SS.000000000")];
+	strftime(buf, sizeof(buf), "%Y-%m-%d %H:%M:%S.000000000", localtime(&t));
+	return buf;
 }
 
 /* Return the type of the specified file system.
@@ -311,41 +317,41 @@ static void print_it(char const *masterformat, char const *filename,
 	/* create a working copy of the format string */
 	char *format = xstrdup(masterformat);
 
-	/* Add 2 to accommodate our conversion of the stat `%s' format string
-	 * to the printf `%llu' one.  */
+	/* Add 2 to accomodate our conversion of the stat '%s' format string
+	 * to the printf '%llu' one.  */
 	size_t n_alloc = strlen(format) + 2 + 1;
 	char *dest = xmalloc(n_alloc);
 
 	b = format;
 	while (b) {
+		size_t len;
 		char *p = strchr(b, '%');
-		if (p != NULL) {
-			size_t len;
-			*p++ = '\0';
-			fputs(b, stdout);
-
-			len = strspn(p, "#-+.I 0123456789");
-			dest[0] = '%';
-			memcpy(dest + 1, p, len);
-			dest[1 + len] = 0;
-			p += len;
-
-			b = p + 1;
-			switch (*p) {
-				case '\0':
-					b = NULL;
-					/* fall through */
-				case '%':
-					putchar('%');
-					break;
-				default:
-					print_func(dest, n_alloc, *p, filename, data);
-					break;
-			}
-
-		} else {
-			fputs(b, stdout);
+		if (!p) {
+			/* coreutils 6.3 always print <cr> at the end */
+			/*fputs(b, stdout);*/
+			puts(b);
+			break;
+		}
+		*p++ = '\0';
+		fputs(b, stdout);
+
+		len = strspn(p, "#-+.I 0123456789");
+		dest[0] = '%';
+		memcpy(dest + 1, p, len);
+		dest[1 + len] = 0;
+		p += len;
+
+		b = p + 1;
+		switch (*p) {
+		case '\0':
 			b = NULL;
+			/* fall through */
+		case '%':
+			putchar('%');
+			break;
+		default:
+			print_func(dest, n_alloc, *p, filename, data);
+			break;
 		}
 	}
 
@@ -372,7 +378,7 @@ static int do_statfs(char const *filename, char const *format)
 			  "    ID: %-8i Namelen: %-7l Type: %T\n"
 			  "Block size: %-10s\n"
 			  "Blocks: Total: %-10b Free: %-10f Available: %a\n"
-			  "Inodes: Total: %-10c Free: %d\n");
+			  "Inodes: Total: %-10c Free: %d");
 	print_it(format, filename, print_statfs, &statfsbuf);
 #else
 
@@ -420,7 +426,7 @@ static int do_stat(char const *filename, char const *format)
 #ifdef CONFIG_FEATURE_STAT_FORMAT
 	if (format == NULL) {
 		if (flags & OPT_TERSE) {
-			format = "%n %s %b %f %u %g %D %i %h %t %T %X %Y %Z %o\n";
+			format = "%n %s %b %f %u %g %D %i %h %t %T %X %Y %Z %o";
 		} else {
 			if (S_ISBLK(statbuf.st_mode) || S_ISCHR(statbuf.st_mode)) {
 				format =
@@ -517,7 +523,7 @@ int stat_main(int argc, char **argv)
 	int (*statfunc)(char const *, char const *) = do_stat;
 
 	flags = getopt32(argc, argv, "ftL"
-	USE_FEATURE_STAT_FORMAT("c:", &format)
+		USE_FEATURE_STAT_FORMAT("c:", &format)
 	);
 
 	if (flags & 1)                /* -f */
diff --git a/networking/httpd.c b/networking/httpd.c
index 47d41a1e2..08b40e014 100644
--- a/networking/httpd.c
+++ b/networking/httpd.c
@@ -1103,7 +1103,7 @@ static int sendCgi(const char *url,
 
 	post_readed_size = 0;
 	post_readed_idx = 0;
-	inFd  = fromCgi[0];
+	inFd = fromCgi[0];
 	outFd = toCgi[1];
 	close(fromCgi[1]);
 	close(toCgi[0]);
@@ -1190,6 +1190,10 @@ static int sendCgi(const char *url,
 					if (strncmp(rbuf, "HTTP/1.0 200 OK\r\n", 4) != 0) {
 						full_write(s, "HTTP/1.0 200 OK\r\n", 17);
 					}
+					/* Sometimes CGI is writing to pipe in small chunks
+					 * and we don't see Content-type (because the read
+					 * is too short) and we emit bogus "text/plain"!
+					 * Is it a bug or CGI *has to* write it in one piece? */
 					if (strstr(rbuf, "ontent-") == 0) {
 						full_write(s, "Content-type: text/plain\r\n\r\n", 28);
 					}
@@ -1480,6 +1484,7 @@ static void handleIncoming(void)
 		strcpy(url, buf);
 		/* extract url args if present */
 		test = strchr(url, '?');
+		config->query = NULL;
 		if (test) {
 			*test++ = '\0';
 			config->query = test;
@@ -1640,20 +1645,26 @@ static void handleIncoming(void)
 			sendHeaders(HTTP_NOT_IMPLEMENTED);
 			break;
 		}
-		if (purl[-1] == '/') {
-			if (access("cgi-bin/index.cgi", X_OK) == 0) {
-				config->query = url;
-				sendCgi("/cgi-bin/index.cgi", prequest, length, cookie, content_type);
-				break;
-			}
-		}
 #endif  /* FEATURE_HTTPD_CGI */
 		if (purl[-1] == '/')
 			strcpy(purl, "index.html");
 		if (stat(test, &sb) == 0) {
+			/* It's a dir URL and there is index.html */
 			config->ContentLength = sb.st_size;
 			config->last_mod = sb.st_mtime;
 		}
+#if ENABLE_FEATURE_HTTPD_CGI
+		else if (purl[-1] == '/') {
+			/* It's a dir URL and there is no index.html
+			 * Try cgi-bin/index.cgi */
+			if (access("/cgi-bin/index.cgi"+1, X_OK) == 0) {
+				purl[0] = '\0';
+				config->query = url;
+				sendCgi("/cgi-bin/index.cgi", prequest, length, cookie, content_type);
+				break;
+			}
+		}
+#endif  /* FEATURE_HTTPD_CGI */
 		sendFile(test);
 		config->ContentLength = -1;
 	} while (0);
diff --git a/networking/httpd_index_cgi_example b/networking/httpd_index_cgi_example
new file mode 100644
index 000000000..31e768c70
--- /dev/null
+++ b/networking/httpd_index_cgi_example
@@ -0,0 +1,55 @@
+#!/bin/sh
+# This CGI creates directory index.
+# Put it into cgi-bin/index.cgi and chmod 0755.
+#
+# Problems:
+# * Unsafe wrt weird filenames with <>"'& etc...
+# * Not efficient: calls stat (program, not syscall) for each file
+# * Probably requires bash
+#
+# If you want speed and safety, you need to code it in C
+
+# Must start with '/'
+test "${QUERY_STRING:0:1}" = "/" || exit 1
+# /../ is not allowed
+test "${QUERY_STRING%/../*}" = "$QUERY_STRING" || exit 1
+test "${QUERY_STRING%/..}" = "$QUERY_STRING" || exit 1
+
+# Outta cgi-bin...
+cd .. 2>/dev/null || exit 1
+# Strip leading '/', go to target dir
+cd "${QUERY_STRING:1}" 2>/dev/null || exit 1
+
+f=`dirname "$QUERY_STRING"`
+test "$f" = "/" && f=""
+
+# Pipe thru dd (need to write header as single write(),
+# or else httpd doesn't see "Content-type: text/html"
+# in first read() and decides that it is not html)
+{
+printf "%s" \
+$'HTTP/1.0 200 OK\r\n'\
+$'Content-type: text/html\r\n\r\n'\
+"<html><head><title>Index of $QUERY_STRING</title></head>"$'\r\n'\
+"<body><h1>Index of $QUERY_STRING</h1><pre>"$'\r\n'\
+$'<table width=100%>\r\n'\
+$'<col><col><col width=0*>\r\n'\
+$'<tr><th>Name<th align=right>Last modified<th align=right>Size\r\n'\
+\
+"<tr><td><a href='$f/'>..</a><td><td>"$'\r\n'
+
+IFS='#'
+for f in *; do
+    # Guard against empty dirs...
+    test -e "$f" && \
+    stat -c "%F#%s#%z" "$f" | {
+	read type size cdt junk
+	dir=''
+	test "$type" = "directory" && dir='/'
+	cdt="${cdt//.*}" # no fractional seconds
+	cdt="${cdt// /&nbsp;}" # prevent wrapping around space
+	printf "%s" "<tr><td><a href='$f$dir'>$f</a><td align=right>$cdt<td align=right>$size"$'\r\n'
+    }
+done
+printf "</table></pre><hr></body></html>"$'\r\n'
+} | dd bs=4k
-- 
2.25.1