looks good. need to come back for norme and final testing

ftp/includes/ft_p.h

@@ -25,6 +25,7 @@
 
 # include <sys/mman.h>
 # include <sys/wait.h>
+# include <limits.h>
 
 typedef struct s_cmd_map	t_cmd_map;
 
@@ -46,6 +47,8 @@ enum	e_ftp
 	FILENAME_OK = 700,
 	NO_SUCH_FILE,
 	TRANSFER_START,
+	CD_DIR_NOT_FOUND,
+	CD_RESTRICTED_DIR,
 	ABORT = 800,
 	ERR_READ,
 	ERR_STAT,
@@ -57,6 +60,8 @@ enum	e_ftp
 extern char			**g_av;
 extern int			g_debug;
 extern t_cmd_map	g_cli_cmd[];
+extern char			g_rootdir[PATH_MAX];
+
 
 int			ftp_daemon(int sock);
 int			ftp_spawn(int sock);

ftp/srcs/cli_do_cd.c

@@ -6,6 +6,7 @@ int		cli_do_cd(int sock, char **av)
 		return (console_msg(-1, "usage: cd <path>"));
 	if (req_init(sock, REQUEST_CD))
 		return (1);
+	console_msg(0, "sending %s", av[1]);
 	write(sock, av[1], ft_strlen(av[1]));
 	return (0);
 }

ftp/srcs/serv_do_cd.c

@@ -1,17 +1,34 @@
 #include "ft_p.h"
 
+char	g_rootdir[PATH_MAX];
+
 int		serv_do_cd(int sock)
 {
-	char	*oldpwd;
 	char 	path[MAXLINE];
+	char	*abspath;
 	int		ret;
+	char	*ok;
 
 	if ((ret = read(sock, path, MAXLINE)) < 0)
 		return (CMD_FAIL);
+	path[ret] = 0;
 
 	DG("received 'cd %s' command", path);
 
-	oldpwd = getcwd(NULL, 0);
-	(void)oldpwd;
+	ok = NULL;
+	if (!(abspath = realpath(path, ok)))
+		return (CD_DIR_NOT_FOUND);
+
+	ft_strcpy(path, abspath);
+	if (!*abspath)
+		return (CD_DIR_NOT_FOUND);
+
+	ft_strdel(&abspath);
+
+	DG("absolute path is '%s'", path);
+	DG("root dir is '%s'", g_rootdir);
+
+	if (!ft_strstr(path, g_rootdir))
+		return (CD_RESTRICTED_DIR);
 	return(chdir(path) ? CMD_FAIL : CMD_SUCCESS);
 }

ftp/srcs/server.c

@@ -15,6 +15,7 @@
 #define FTP_SERVER_USAGE	"%s <port>"
 
 char	**g_av = NULL;
+char	g_rootdir[PATH_MAX];
 t_itof	g_ftp_cmd[] =
 {
 	{REQUEST_FILE, serv_do_get},
@@ -94,6 +95,7 @@ int		main(int ac, char **av)
 	int					sock;
 
 	g_av = av;
+	getcwd(g_rootdir, PATH_MAX);
 	if (ac != 2)
 		ft_usage(FTP_SERVER_USAGE, av[0]);
 	port = ft_atoi(av[1]);