care about HOME also in proxychains loader. put common symbols in common.h

src/common.h

@@ -0,0 +1,2 @@
+#define PROXYCHAINS_CONF_FILE_ENV_VAR "PROXYCHAINS_CONF_FILE"
+#define PROXYCHAINS_CONF_FILE "proxychains.conf"

src/core.h

@@ -18,6 +18,7 @@
 #define __CORE_HEADER
 #define BUFF_SIZE 8*1024  // used to read responses from proxies.
 #define     MAX_LOCALNET 1024
+
 /*error codes*/
 typedef enum
 {

src/libproxychains.c

@@ -34,6 +34,7 @@
 
 
 #include "core.h"
+#include "common.h"
 
 #define     satosin(x)      ((struct sockaddr_in *) &(x))
 #define     SOCKADDR(x)     (satosin(x)->sin_addr.s_addr)
@@ -61,7 +62,7 @@ static void init_lib(void);
 
 static void init_lib(void)
 {
-	proxychains_write_log("ProxyChains-3.2 (http://github.com/rofl0r/proxychains)\n");
+	proxychains_write_log("[proxychains v3.2] DLL init\n");
 	
 	get_chain_data(proxychains_pd, &proxychains_proxy_count, &proxychains_ct);
 	true_connect = (connect_t) dlsym(RTLD_NEXT, "connect");
@@ -156,12 +157,6 @@ static void init_lib(void)
 	init_l = 1;
 }
 
-/*
- * XXX. Same thing is defined in proxychains main.c it
- * needs to be changed, too.
- */
-#define PROXYCHAINS_CONF_FILE "PROXYCHAINS_CONF_FILE"
-
 static inline void get_chain_data(
 			proxy_data *pd,
 			unsigned int *proxy_count,
@@ -188,7 +183,7 @@ static inline void get_chain_data(
 	 * Get path to configuration file from env this file has priority
 	 * if it's defined.
 	 */
-	env = getenv(PROXYCHAINS_CONF_FILE);
+	env = getenv(PROXYCHAINS_CONF_FILE_ENV_VAR);
 
 	snprintf(buff,256,"%s/.proxychains/proxychains.conf",getenv("HOME"));
 

src/main.c

@@ -26,7 +26,7 @@
 extern char *optarg;
 extern int optind, opterr, optopt;
 
-#define PROXYCHAINS_CONF_FILE "proxychains.conf"
+#include "common.h"
 
 static void usage(char** argv) {
 	printf("\nUsage:	 %s [h] [f] config_file program_name [arguments]\n"
@@ -34,6 +34,11 @@ static void usage(char** argv) {
 		"More help in README file\n", argv[0]);
 }
 
+int check_path(char* path) {
+	if(!path) return 0;
+	return access(path, R_OK) != -1;
+}
+
 int main(int argc, char *argv[]) {
 	char *path = NULL;
 	char buf[256];
@@ -54,34 +59,42 @@ int main(int argc, char *argv[]) {
 			}
 	}
 
+	/* check if path of config file has not been passed via command line */
 	if(!path) {
-		if(!(path = getenv("PROXYCHAINS_CONF_FILE")))
-			path = getcwd(buf, sizeof(buf));
-		else if(access(path, R_OK) != -1) goto have; 
-		if(!path ||
-			!snprintf(pbuf, sizeof(pbuf), "%s/%s", path, PROXYCHAINS_CONF_FILE) ||
-			access(pbuf, R_OK) == -1
-		) 
-			path = "/etc/proxychains.conf";
-		else 
-			path = pbuf;
-	}
-	if(access(path, R_OK) == -1) {
+		// priority 1: env var PROXYCHAINS_CONF_FILE
+		path = getenv(PROXYCHAINS_CONF_FILE_ENV_VAR);
+		if(check_path(path)) goto have;
+		
+		// priority 2; proxychains conf in actual dir
+		path = getcwd(buf, sizeof(buf));
+		snprintf(pbuf, sizeof(pbuf), "%s/%s", path, PROXYCHAINS_CONF_FILE);
+		path = pbuf;
+		if(check_path(path)) goto have;
+		
+		// priority 3; $HOME/.proxychains/proxychains.conf
+		path = getenv("HOME");
+		snprintf(pbuf, sizeof(pbuf), "%s/.proxychains/%s", path, PROXYCHAINS_CONF_FILE);
+		path = pbuf;
+		if(check_path(path)) goto have;
+		
+		// priority 4: /etc/proxychains.conf
+		path = "/etc/proxychains.conf";
+		if(check_path(path)) goto have;
 		perror("couldnt find configuration file");
 		return 1;
 	}
+	
 	have:
 
-	printf("using config file: %s\n", path);
-	//printf("argv = %s\n", argv[1]);
+	printf("[proxychains config] %s\n", path);
 
 	/* Set PROXYCHAINS_CONF_FILE to get proxychains lib to use new config file. */
-	setenv("PROXYCHAINS_CONF_FILE", path, 1);
+	setenv(PROXYCHAINS_CONF_FILE_ENV_VAR, path, 1);
 	
 	snprintf(buf, sizeof(buf), "LD_PRELOAD=%s/libproxychains.so", LIB_DIR);
 	putenv(buf);
 	execvp(argv[1], &argv[1]);
 	perror("proxychains can't load process....");
 
-	return EXIT_SUCCESS;
+	return EXIT_FAILURE;
 }