2 * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
3 * Licensed under the GPL
6 #ifndef __USER_UTIL_H__
7 #define __USER_UTIL_H__
9 #include "sysdep/ptrace.h"
11 /* Copied from kernel.h and compiler-gcc.h */
13 /* Force a compilation error if condition is true, but also produce a
14 result (of value 0 and type size_t), so the expression can be used
15 e.g. in a structure initializer (or where-ever else comma expressions
17 #define BUILD_BUG_ON_ZERO(e) (sizeof(char[1 - 2 * !!(e)]) - 1)
19 /* &a[0] degrades to a pointer: a different type from an array */
20 #define __must_be_array(a) \
21 BUILD_BUG_ON_ZERO(__builtin_types_compatible_p(typeof(a), typeof(&a[0])))
23 #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr))
25 #define CATCH_EINTR(expr) while ((errno = 0, ((expr) < 0)) && (errno == EINTR))
29 extern int grantpt(int __fd);
30 extern int unlockpt(int __fd);
31 extern char *ptsname(int __fd);
33 extern void *add_signal_handler(int sig, void (*handler)(int));
34 extern void input_cb(void (*proc)(void *), void *arg, int arg_len);
35 extern int get_pty(void);
36 extern int switcheroo(int fd, int prot, void *from, void *to, int size);
37 extern void do_exec(int old_pid, int new_pid);
38 extern void tracer_panic(char *msg, ...)
39 __attribute__ ((format (printf, 1, 2)));
40 extern int detach(int pid, int sig);
41 extern int attach(int pid);
42 extern void kill_child_dead(int pid);
43 extern int cont(int pid);
44 extern void check_sigio(void);
45 extern int raw(int fd);