chdir to BASE_DIR

Change to the base directory so that the installed program can find the data
files.

Author: michich

bot.c

@@ -1095,7 +1095,7 @@ int main(int argc,char **argv)
 	printf("Started WinSock version %X.%02X\n", wd.wVersion/0x100, wd.wVersion&0xFF);
 #endif
 
-
+	chdir_to_data_files();
 	ERROR("Initialization...\n");
 
 	last_obj=&objects;

client.c

@@ -2223,7 +2223,7 @@ int main(int argc,char **argv)
 	printf("Started WinSock version %X.%02X\n", wd.wVersion/0x100, wd.wVersion&0xFF);
 #endif
 
-
+	chdir_to_data_files();
 #ifdef XWINDOW
 	x_display_name=0;
 	x_font_name=0;

configure.in

@@ -34,9 +34,7 @@ AC_STRUCT_TM
 dnl Checks for library functions.
 AC_PROG_GCC_TRADITIONAL
 AC_TYPE_SIGNAL
-AC_CHECK_FUNCS(gettimeofday select strtol strtoul getopt)
-
-AC_CHECK_FUNCS(psignal)
+AC_CHECK_FUNCS(gettimeofday select strtol strtoul getopt psignal access)
 
 AC_CHECK_FUNC(random, cf_result=yes, cf_result=no)
 if test "$cf_result" = no; then

data.c

@@ -6,6 +6,12 @@
 #include "config.h"
 #endif
 
+#ifdef HAVE_ACCESS
+# ifdef HAVE_UNISTD_H
+#  include <unistd.h>
+# endif
+#endif
+
 #include "data.h"
 #include "cfg.h"
 #include "hash.h"
@@ -623,3 +629,25 @@ char* md5_level(int level_num)
 	mem_free(result);
 	return q;
 }
+
+/* returns 1 if the file is readable */
+static int r_access(const char *filename)
+{
+#ifdef HAVE_ACCESS
+	return !access(filename, R_OK);
+#else
+	FILE *f = fopen(filename, "r");
+	if (f) {
+		fclose(f);
+		return 1;
+	}
+	return 0;
+#endif
+}
+
+/* changes the current dir to where the data files can be found */
+void chdir_to_data_files(void)
+{
+	if (!r_access(DATA_PATH BANNER_FILE))
+		chdir(BASE_DIR);
+}

data.h

@@ -252,4 +252,5 @@ void update_position(
 extern void _skip_ws(char**txt);
 extern int _convert_type(unsigned char c);
 extern char * load_level(int);
+extern void chdir_to_data_files(void);
 #endif

editor.c

@@ -361,6 +361,7 @@ int main(int argc, char**argv)
 	unsigned long_long last_time;
 	char *LEVEL;
 
+	chdir_to_data_files();
 	set_sigint();
 
 	while(1)

server.c

@@ -3081,6 +3081,7 @@ int main(int argc, char **argv)
 	}
 	consoleApp=1;
 #endif
+	chdir_to_data_files();
 	parse_command_line(argc,argv);
 
 	a=server();