replace libcgi with some code extracted from haserl - libcgi is too inflexible and breaks rrdtool

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@6554 3c298f89-4303-0410-b956-a3cf2f4a3e73

2 files changed, 529 insertions, 28 deletions

diff --git a/package/busybox/Makefile b/package/busybox/Makefile
index eae037aaaa..cf6ddac6ec 100644
--- a/package/busybox/Makefile
+++ b/package/busybox/Makefile
@@ -19,7 +19,7 @@ PKG_MD5SUM:=5728403bce309cdabcffa414e2e64052
 PKG_CAT:=bzcat
 
 PKG_BUILD_DIR:=$(BUILD_DIR)/$(PKG_NAME)-$(PKG_VERSION)
-PKG_BUILD_DEPENDS:=libcgi
+PKG_BUILD_DEPENDS:=gcgi
 
 include $(INCLUDE_DIR)/package.mk
 
@@ -62,10 +62,9 @@ define Build/Compile
 	$(MAKE) -C $(PKG_BUILD_DIR) \
 		CC="$(TARGET_CC)" \
 		CROSS_COMPILE="$(TARGET_CROSS)" \
-		EXTRA_CFLAGS="$(TARGET_CFLAGS) -I$(STAGING_DIR)/usr/include" \
+		EXTRA_CFLAGS="$(TARGET_CFLAGS)" \
 		ARCH="$(ARCH)" \
 		IPKG_ARCH="$(ARCH)" \
-		EXTRA_LIBS="$(STAGING_DIR)/usr/lib/libcgi.a" \
 		all
 endef
 
@@ -73,11 +72,10 @@ define Package/busybox/install
 	$(MAKE) -C $(PKG_BUILD_DIR) \
 		CC="$(TARGET_CC)" \
 		CROSS_COMPILE="$(TARGET_CROSS)" \
-		EXTRA_CFLAGS="$(TARGET_CFLAGS) -I$(STAGING_DIR)/usr/include" \
+		EXTRA_CFLAGS="$(TARGET_CFLAGS)" \
 		ARCH="$(ARCH)" \
 		IPKG_ARCH="$(ARCH)" \
 		CONFIG_PREFIX="$(1)" \
-		EXTRA_LIBS="$(STAGING_DIR)/usr/lib/libcgi.a" \
 		install
 	$(INSTALL_DIR) $(1)/etc/init.d
 	for tmp in $(init-y); do \
diff --git a/package/busybox/patches/920-awx.patch b/package/busybox/patches/920-awx.patch
index c9c653bb69..4c8331722c 100644
--- a/package/busybox/patches/920-awx.patch
+++ b/package/busybox/patches/920-awx.patch
@@ -97,8 +97,8 @@ diff -purN bb.old/editors/awk.c bb.dev/editors/awk.c
  		switch (c) {
 diff -purN bb.old/editors/awx.c bb.dev/editors/awx.c
 --- bb.old/editors/awx.c	1970-01-01 01:00:00.000000000 +0100
-+++ bb.dev/editors/awx.c	2007-03-11 06:25:48.552095336 +0100
-@@ -0,0 +1,521 @@
++++ bb.dev/editors/awx.c	2007-03-11 19:03:27.417297384 +0100
+@@ -0,0 +1,553 @@
 +/*
 + * awk web extension
 + *
@@ -121,6 +121,7 @@ diff -purN bb.old/editors/awx.c bb.dev/editors/awx.c
 +#undef fputs
 +
 +static xhash *lstr = NULL;
++static xhash *formvar = NULL;
 +static int lang_inuse = 0;
 +
 +/* look up a translation symbol from the hash */
@@ -507,14 +508,42 @@ diff -purN bb.old/editors/awx.c bb.dev/editors/awx.c
 +	f->nargs = nargs;
 +}
 +
++static void putvar(vartype type, char *name, char *value)
++{
++	if (type != FORM_VAR)
++		return;
++
++	setvar_u(findvar(formvar, name), value);
++}
++
++static char *cgi_getvar(char *name)
++{
++	if (!formvar) {
++		formvar = hash_init();
++		cgi_init(putvar);
++	}
++
++	if (!formvar || !name)
++		return NULL;
++	
++	return getvar_s(findvar(formvar, name));
++}
++
 +/* function call for accessing cgi form variables */
 +static var *getvar(var *res, var *args, int nargs)
 +{
 +	char *s;
++	char *svar;
 +
 +	s = getvar_s(args);
-+	if (s)
-+		setvar_s(res, cgi_param(s) ?: "");
++	if (!s)
++		return res;
++	
++	svar = cgi_getvar(s);
++	if (!svar)
++		return res;
++
++	setvar_u(res, svar);
 +
 +	return res;
 +}
@@ -570,7 +599,6 @@ diff -purN bb.old/editors/awx.c bb.dev/editors/awx.c
 +	while (*argv)
 +		setari_u(V[ARGV], ++i, *argv++);
 +
-+	cgi_init(); 
 +	if (argc < 2) {
 +		fprintf(stderr, "Invalid argument.\n");
 +		goto done;
@@ -585,17 +613,23 @@ diff -purN bb.old/editors/awx.c bb.dev/editors/awx.c
 +	parse_program(s+1);
 +	free(s);
 +
-+	/* set some defaults for ACTION and LAYOUT, which will have special meaning */
-+	cgi_process_form();
 +
-+	action = newvar("ACTION");
-+	setvar_s(action, cgi_param("action") ?: "default");
++	/* set some defaults for ACTION and LAYOUT, which will have special meaning */
 +	layout = newvar("LAYOUT");
 +	setvar_s(layout, "views/layout.ahtml");
 +
 +	/* run the BEGIN {} block */
 +	evaluate(beginseq.first, &tv);
 +
++	action = newvar("ACTION");
++	if (!(strlen(getvar_s(action)) > 0)) {
++		tmp = cgi_getvar("action");
++		if (!tmp || (strlen(tmp) <= 0))
++			tmp = strdup("default");
++
++		setvar_p(action, tmp);
++	}
++	
 +	/* call the action (precedence: begin block override > cgi parameter > "default") */
 +	tmp = xmalloc(strlen(getvar_s(action)) + 7);
 +	sprintf(tmp, "handle_%s", getvar_s(action));
@@ -608,8 +642,6 @@ diff -purN bb.old/editors/awx.c bb.dev/editors/awx.c
 +
 +	ret = 0;
 +done:
-+	cgi_end();
-+	
 +	exit(0);
 +}
 +
@@ -648,15 +680,486 @@ diff -purN bb.old/include/applets.h bb.dev/include/applets.h
  USE_BASENAME(APPLET(basename, _BB_DIR_USR_BIN, _BB_SUID_NEVER))
  USE_BBCONFIG(APPLET(bbconfig, _BB_DIR_BIN, _BB_SUID_NEVER))
  //USE_BBSH(APPLET(bbsh, _BB_DIR_BIN, _BB_SUID_NEVER))
-diff -purN bb.old/Makefile bb.dev/Makefile
---- bb.old/Makefile	2007-03-06 19:38:07.358080000 +0100
-+++ bb.dev/Makefile	2007-03-07 02:28:22.844957960 +0100
-@@ -565,7 +565,7 @@ quiet_cmd_busybox__ ?= LINK    $@
-       cmd_busybox__ ?= $(srctree)/scripts/trylink $(CC) $(LDFLAGS) \
-       -o $@ \
-       -Wl,--warn-common -Wl,--sort-common -Wl,--gc-sections \
--      -Wl,--start-group $(busybox-all) -Wl,--end-group
-+      -Wl,--start-group $(busybox-all) $(EXTRA_LIBS) -Wl,--end-group
- 
- # Generate System.map
- quiet_cmd_sysmap = SYSMAP
+diff -purN bb.old/include/cgi.h bb.dev/include/cgi.h
+--- bb.old/include/cgi.h	1970-01-01 01:00:00.000000000 +0100
++++ bb.dev/include/cgi.h	2007-03-11 18:58:10.708444448 +0100
+@@ -0,0 +1,8 @@
++#ifndef CGI_H
++#define CGI_H
++
++typedef enum { FORM_VAR, COOKIE_VAR } vartype;
++typedef void (*var_handler) (vartype, char *, char *);
++int cgi_init(var_handler);
++
++#endif
+diff -purN bb.old/libbb/cgi.c bb.dev/libbb/cgi.c
+--- bb.old/libbb/cgi.c	1970-01-01 01:00:00.000000000 +0100
++++ bb.dev/libbb/cgi.c	2007-03-11 19:02:04.691873560 +0100
+@@ -0,0 +1,457 @@
++/* --------------------------------------------------------------------------
++ * functions for processing cgi form data
++ * Copyright (C) 2007 by Felix Fietkau <nbd@openwrt.org>
++ *
++ * parts taken from the core of haserl.cgi - a poor-man's php for embedded/lightweight environments
++ * $Id: haserl.c,v 1.13 2004/11/10 17:59:35 nangel Exp $ 
++ * Copyright (c) 2003,2004    Nathan Angelacos (nangel@users.sourceforge.net)
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
++ * General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
++ *
++ * -----
++ * The x2c() and unescape_url() routines were taken from  
++ *  http://www.jmarshall.com/easy/cgi/getcgi.c.txt 
++ * 
++ * The comments in that text file state:
++ *
++ ***  Written in 1996 by James Marshall, james@jmarshall.com, except 
++ ***  that the x2c() and unescape_url() routines were lifted directly 
++ ***  from NCSA's sample program util.c, packaged with their HTTPD. 
++ ***     For the latest, see http://www.jmarshall.com/easy/cgi/ 
++ * -----
++ *
++ ------------------------------------------------------------------------- */
++
++#include <stdio.h>
++#include <unistd.h>
++#include <time.h>
++#include <sys/mman.h>
++#include <sys/types.h>
++#include <sys/wait.h>
++#include <sys/stat.h>
++#include <sys/fcntl.h>
++#include <stdlib.h>
++#include <string.h>
++#include <cgi.h>
++
++#ifndef MAX_UPLOAD_KB
++#define MAX_UPLOAD_KB 2048
++#endif
++#define TEMPDIR "/tmp"
++
++static int global_upload_size = 0;
++static int ReadMimeEncodedInput(char *qs);
++static var_handler do_putvar = NULL;
++
++/*
++ * Convert 2 char hex string into char it represents
++ * (from http://www.jmarshall.com/easy/cgi)
++ */
++static char x2c (char *what) {
++	char digit;
++	
++	digit=(what[0] >= 'A' ? ((what[0] & 0xdf) - 'A')+10 : (what[0] - '0'));
++	digit *=16;
++	digit+=(what[1] >= 'A' ? ((what[1] & 0xdf) - 'A')+10 : (what[1] - '0'));
++
++	return digit;
++}
++
++/*
++ * unsescape %xx to the characters they represent 
++ */
++
++static void unescape_url (char *url) {
++	int  i,j;
++
++	for (i=0, j=0; url[j]; ++i, ++j) {
++		if ((url[i] = url[j]) == '%') {
++			url[i] = x2c(&url[j+1]);
++			j+=2;	
++		}
++	}
++	url[i]='\0';
++}
++
++static inline void put_var(vartype type, char *var)
++{
++	char *val;
++	
++	if (!do_putvar)
++		return;
++
++	val = strchr(var, '=');
++	if (!val)
++		return;
++	
++	*val = 0;
++	val++;
++	do_putvar(type, var, val);
++	
++	return;
++}
++
++
++/* CookieVars ()
++ * if HTTP_COOKIE is passed as an environment variable,
++ * attempt to parse its values into environment variables
++ */
++static void CookieVars (void)
++{
++	char *qs;
++	char *token;
++
++	if (getenv("HTTP_COOKIE") != NULL)
++		qs=strdup(getenv("HTTP_COOKIE"));
++	else
++		return;
++	
++	/** split on; to extract name value pairs */
++	token=strtok(qs, ";");
++	while (token) {
++		// skip leading spaces 
++		while ( token[0] == ' ' ) 
++			token++;
++		
++		put_var(COOKIE_VAR, token);
++		
++		token = strtok(NULL, ";");
++	}
++	free (qs);
++}
++
++/* 
++ * Read cgi variables from query string, and put in environment
++ */
++static int ReadCGIQueryString (void) 
++{
++	char *qs;
++	char *token;
++	int i;
++
++	if (getenv("QUERY_STRING") != NULL)
++		qs=strdup(getenv("QUERY_STRING"));
++	else
++		return 0;
++	
++	/* change plusses into spaces */
++	for (i=0; qs[i]; i++ ) { if (qs[i] == '+' ) { qs[i] = ' ';} };
++
++	/** split on & and ; to extract name value pairs */
++	
++	token=strtok(qs, "&;");
++	while (token) {
++		unescape_url(token);
++		put_var(FORM_VAR, token);
++		token=strtok(NULL, "&;");
++	}
++	free(qs);
++
++	return 0;
++}
++
++
++/* 
++ * Read cgi variables from stdin (for POST queries)
++ * (oh... and if its mime-encoded file upload, we save the
++ * file to /tmp; and return the name of the tmp file
++ * the cgi script is responsible for disposing of the tmp file
++ */
++
++static int ReadCGIPOSTValues (void) {
++	char *qs;
++	int content_length;
++	int i;
++	char *token;
++
++
++ 	if (getenv("CONTENT_LENGTH") == NULL) 
++		return(-1);
++	else
++		content_length = atoi(getenv("CONTENT_LENGTH"));
++	
++	/* protect ourselves from 20GB file uploads */
++	if (content_length > MAX_UPLOAD_KB * 1024 ) {
++		/* But we need to finish reading the content */
++	 	while (	fread( &i, sizeof(int), 1, stdin) == 1 );
++		return -1;
++	}
++ 
++ 	if (!(qs=malloc(content_length+1)))
++		return -1;
++
++	/* set the buffer to null, so that a browser messing with less 
++  	   data than content_length won't buffer underrun us */
++	memset(qs, 0 ,content_length+1);
++
++	if ((!fread(qs,content_length,1,stdin) &&
++		(content_length > 0) 
++		&& !feof(stdin))) {
++			
++		free(qs);
++		return -1;
++	}
++
++	if (getenv("CONTENT_TYPE") && (strncasecmp(getenv("CONTENT_TYPE"), "multipart/form-data", 19) == 0)) {
++		/* This is a mime request, we need to go to the mime handler */
++		i=ReadMimeEncodedInput(qs);
++		free(qs);
++			
++		return i;
++	}
++
++	/* change plusses into spaces */
++	for (i=0; qs[i]; i++ ) { if (qs[i] == '+' ) { qs[i] = ' ';} };
++
++	/** split on & and ; to extract name value pairs */
++	token=strtok(qs, "&;");
++	while (token) {
++		unescape_url(token);
++		put_var(FORM_VAR, token);
++		token=strtok(NULL, "&;");
++	}
++	
++	free(qs);
++	
++	return 0;
++}
++
++/*
++ *  LineToStr - Scans char and replaces the first "\n" with a "\0";
++ *  If it finds a "\r", it does that to; (fix DOS brokennes) returns
++ *  the length of the string;
++ */
++static int LineToStr (char *string, size_t max) {
++	size_t offset=0;
++
++	while ((offset < max) && (string[offset] != '\n') && (string[offset] != '\r'))
++		offset++;
++
++	if (string[offset] == '\r') {
++		string[offset]='\0';
++		offset++;
++	}
++	if (string[offset] == '\n') {
++		string[offset]='\0';
++		offset++;
++	}
++
++	return offset;
++}
++
++
++/*
++ * ReadMimeEncodedInput - handles things that are mime encoded
++ * takes a pointer to the input; returns 0 on success
++ */
++
++static int ReadMimeEncodedInput(char *qs) 
++{
++	char 	*boundary;
++	char	*ct;
++	int	i;
++	int	datastart;
++ 	size_t	cl;
++	size_t	offset;
++	char    *envname;
++	char	*filename;
++	char 	*ptr;
++	int	line;
++	char 	tmpname[] = TEMPDIR "/XXXXXX";
++	int	fd;
++	/* we should only get here if the content type was set. Segfaults happen
++	   if Content_Type is null */
++
++	if (getenv("CONTENT_LENGTH") == NULL)
++		/* No content length?! */
++		return(-1);
++
++	cl=atoi(getenv("CONTENT_LENGTH"));
++	
++	/* we do this 'cause we can't mess with the real env. variable - it would
++	 * overwrite the environment - I tried.
++	 */
++	i=strlen(getenv("CONTENT_TYPE"))+1;
++	ct=malloc(i);
++	if (ct)
++		memcpy(ct, getenv("CONTENT_TYPE"), i);
++	else
++		return(-1);
++	
++	i=(int) NULL;
++ 	if (ct != NULL) {
++		while (i < strlen(ct) && (strncmp("boundary=", &ct[i], 9) != 0)) 
++			i++;
++	}
++	if (i == strlen(ct)) {
++		/* no boundary informaiton found */
++		free(ct);
++		return -1;
++	}
++	boundary=&ct[i+7];
++	/* add two leading -- to the boundary */
++	boundary[0]='-';
++	boundary[1]='-';
++	
++	/* begin the big loop.  Look for:
++		--boundary
++		Content-Disposition: form-data;  name="......." 
++		....
++		<blank line>
++		content
++		--boundary
++		Content-Disposition: form-data; name="....." filename="....."
++		...
++		<blank line>
++		--boundary--
++		eof
++	*/
++
++	offset=0;
++	while (offset < cl) {
++		/* first look for boundary */
++		while ((offset < cl) && (memcmp(&qs[offset], boundary, strlen(boundary)))) 
++			offset++;
++
++		/* if we got here and we ran off the end, its an error 		*/
++		if (offset >= cl) { 
++			free(ct);
++			return -1;
++		}
++
++		/* if the two characters following the boundary are --, 	*/ 
++		/* then we are at the end, exit 				*/
++		if (memcmp(&qs[offset+strlen(boundary)], "--", 2) == 0) {
++			offset+=2;
++			break;
++		}
++		/* find where the offset should be */
++		line=LineToStr(&qs[offset], cl-offset);
++		offset+=line;
++				
++		/* Now we're going to look for content-disposition		*/ 
++		line=LineToStr(&qs[offset], cl-offset);
++		if (strncasecmp(&qs[offset], "Content-Disposition", 19) != 0) {
++			/* hmm... content disposition was not where we expected it */
++			free(ct);
++			return -1;
++		}
++		/* Found it, so let's go find "name="				*/
++	 	if (!(envname=strstr(&qs[offset], "name="))) {
++			/* now name= is missing?!  				*/
++			free(ct);
++			return(-1);
++		} else
++			envname+=6;
++
++		/* is there a filename tag? 					*/
++		if ((filename=strstr(&qs[offset], "filename="))!= NULL)
++			filename+=10;
++		else
++			filename=NULL;
++		
++		/* make envname and filename ASCIIZ				*/
++		for (i=0; (envname[i] != '"') && (envname[i] != '\0'); i++);
++		
++		envname[i] = '\0';
++		if (filename) {
++			for (i=0; (filename[i] != '"') && (filename[i] != '\0'); i++);
++			filename[i] = '\0';
++		}
++		offset+=line;
++		
++		/* Ok, by some miracle, we have the name; let's skip till we	*/
++		/* come to a blank line						*/
++		line=LineToStr(&qs[offset], cl-offset);
++		while (strlen(&qs[offset]) > 1) {
++			offset+=line;
++			line=LineToStr(&qs[offset], cl-offset);
++		}
++		offset+=line;
++		datastart=offset;
++		/* And we go back to looking for a boundary */
++		while ((offset < cl) && (memcmp(&qs[offset], boundary, strlen(boundary))))
++			offset++;
++
++		/* strip [cr] lf */
++		if ((qs[offset-1] == '\n') && (qs[offset-2] == '\r'))
++			offset-=2; 
++		else
++			offset-=1;
++
++		qs[offset]=0;
++
++		/* ok, at this point, we know where the name is, and we know    */
++		/* where the content is... we have to do one of two things      */
++		/* based on whether its a file or not				*/
++		if (filename==NULL) { /* its not a file, so its easy		*/
++			/* just jam the content after the name		*/
++			memcpy(&envname[strlen(envname)+1], &qs[datastart], offset-datastart+1);
++			envname[strlen(envname)]='=';
++			put_var(FORM_VAR, envname);
++		} else {	/* handle the fileupload case		*/
++			if (offset-datastart) {  /* only if they uploaded */
++				if ( global_upload_size == 0 ) {
++					return -1;
++				}
++				/*  stuff in the filename */
++				ptr= calloc ( sizeof (char), strlen(envname)+strlen(filename)+2+5 );
++				sprintf (ptr, "%s_name=%s", envname, filename);
++				put_var(FORM_VAR, ptr);
++				free(ptr);
++						
++				fd=mkstemp(tmpname);
++				
++				if (fd == -1)
++					return(-1);
++
++				write(fd, &qs[datastart], offset-datastart);
++				close(fd);
++				ptr= calloc (sizeof(char), strlen(envname)+strlen(tmpname)+2);
++				sprintf (ptr, "%s=%s", envname, tmpname);
++				put_var(FORM_VAR, ptr);
++				free(ptr);
++			}
++		}
++	}
++	free(ct);
++	return 0;
++}
++
++	
++/*-------------------------------------------------------------------------
++ *
++ * Main 
++ *
++ *------------------------------------------------------------------------*/
++
++int cgi_init(var_handler putvar_handler)
++{
++	int	retval = 0;
++	
++	do_putvar = putvar_handler;
++
++	/* Read the current environment into our chain */
++	CookieVars();
++	if (getenv("REQUEST_METHOD")) {
++		if (strcasecmp(getenv("REQUEST_METHOD"), "GET") == 0)
++			retval = ReadCGIQueryString();
++
++		if (strcasecmp(getenv("REQUEST_METHOD"), "POST") == 0)
++			retval = ReadCGIPOSTValues();
++	}
++
++	return retval;
++} 
+diff -purN bb.old/libbb/Kbuild bb.dev/libbb/Kbuild
+--- bb.old/libbb/Kbuild	2007-03-06 19:38:07.361080000 +0100
++++ bb.dev/libbb/Kbuild	2007-03-11 18:40:51.384445712 +0100
+@@ -118,3 +118,6 @@ lib-$(CONFIG_GREP) += xregcomp.o
+ lib-$(CONFIG_MDEV) += xregcomp.o
+ lib-$(CONFIG_LESS) += xregcomp.o
+ lib-$(CONFIG_DEVFSD) += xregcomp.o
++
++lib-$(CONFIG_AWX) += cgi.o
++