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|
/*
* SPDX-License-Identifier: ISC
*
* Copyright (c) 2011-2017 Todd C. Miller <Todd.Miller@sudo.ws>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef SUDO_DEBUG_H
#define SUDO_DEBUG_H
#include <sys/types.h> /* for id_t, mode_t, size_t, ssize_t, time_t */
#include <stdarg.h>
#ifdef HAVE_STDBOOL_H
# include <stdbool.h>
#else
# include <compat/stdbool.h>
#endif
#include <sudo_queue.h>
/*
* List of debug files and flags for use in registration.
*/
struct sudo_debug_file {
TAILQ_ENTRY(sudo_debug_file) entries;
char *debug_file;
char *debug_flags;
};
struct sudo_conf_debug_file_list;
/*
* The priority and subsystem are encoded in a single 32-bit value.
* The lower 4 bits are the priority and the top 26 bits are the subsystem.
* This allows for 16 priorities and a very large number of subsystems.
* Bit 5 is used as a flag to specify whether to log the errno value.
* Bit 6 specifies whether to log the function, file and line number data.
*/
/*
* Sudo debug priorities, ordered least to most verbose,
* in other words, highest to lowest priority. Max pri is 15.
* Note: order must match sudo_debug_priorities[]
*/
#define SUDO_DEBUG_CRIT 1 /* critical errors */
#define SUDO_DEBUG_ERROR 2 /* non-critical errors */
#define SUDO_DEBUG_WARN 3 /* non-fatal warnings */
#define SUDO_DEBUG_NOTICE 4 /* non-error condition notices */
#define SUDO_DEBUG_DIAG 5 /* diagnostic messages */
#define SUDO_DEBUG_INFO 6 /* informational message */
#define SUDO_DEBUG_TRACE 7 /* log function enter/exit */
#define SUDO_DEBUG_DEBUG 8 /* very verbose debugging */
/* Flag to include string version of errno in debug info. */
#define SUDO_DEBUG_ERRNO (1<<4)
/* Flag to include function, file and line number in debug info. */
#define SUDO_DEBUG_LINENO (1<<5)
/*
* Sudo debug subsystems.
* This includes subsystems in the sudoers plugin.
* Note: order must match sudo_debug_subsystems[]
*/
#define SUDO_DEBUG_ARGS ( 1<<6) /* command line argument handling */
#define SUDO_DEBUG_CONV ( 2<<6) /* user conversation */
#define SUDO_DEBUG_EDIT ( 3<<6) /* sudoedit */
#define SUDO_DEBUG_EVENT ( 4<<6) /* event handling */
#define SUDO_DEBUG_EXEC ( 5<<6) /* command execution */
#define SUDO_DEBUG_HOOKS ( 6<<6) /* hook functions */
#define SUDO_DEBUG_MAIN ( 7<<6) /* sudo main() */
#define SUDO_DEBUG_NETIF ( 8<<6) /* network interface functions */
#define SUDO_DEBUG_PCOMM ( 9<<6) /* plugin communications */
#define SUDO_DEBUG_PLUGIN (10<<6) /* main plugin functions */
#define SUDO_DEBUG_PTY (11<<6) /* pseudo-tty */
#define SUDO_DEBUG_SELINUX (12<<6) /* selinux */
#define SUDO_DEBUG_UTIL (13<<6) /* utility functions */
#define SUDO_DEBUG_UTMP (14<<6) /* utmp file ops */
#define SUDO_DEBUG_APPARMOR (15<<6) /* AppArmor */
#define SUDO_DEBUG_ALL 0xffff0000 /* all subsystems */
/* Error return for sudo_debug_register(). */
#define SUDO_DEBUG_INSTANCE_ERROR -2
/* Initializer for instance index to indicate that debugging is not setup. */
#define SUDO_DEBUG_INSTANCE_INITIALIZER -1
/* Extract priority number and convert to an index. */
#define SUDO_DEBUG_PRI(n) (((n) & 0x0f) - 1)
/* Extract subsystem number and convert to an index. */
#define SUDO_DEBUG_SUBSYS(n) (((n) >> 6) - 1)
/*
* Wrapper for sudo_debug_enter() that declares __func__ as needed
* and sets sudo_debug_subsys for sudo_debug_exit().
*/
#ifdef HAVE___FUNC__
# define debug_decl_func(funcname)
# define debug_decl_vars(funcname, subsys) \
const unsigned int sudo_debug_subsys = (subsys)
#else
# define debug_decl_func(funcname) \
const char __func__[] = #funcname;
# define debug_decl_vars(funcname, subsys) \
debug_decl_func(funcname) \
const unsigned int sudo_debug_subsys = (subsys)
#endif
#define debug_decl(funcname, subsys) \
debug_decl_vars((funcname), (subsys)); \
sudo_debug_enter(__func__, __FILE__, __LINE__, sudo_debug_subsys)
/*
* Different flavors of sudo_debug_exit() macros.
*/
#ifndef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION
# define sudo_debug_enter(_func, _file, _line, _sys) \
do { \
sudo_debug_printf2(NULL, NULL, 0, (_sys) | SUDO_DEBUG_TRACE, \
"-> %s @ %s:%d", (_func), (_file), (_line)); \
} while (0)
# define sudo_debug_exit(_func, _file, _line, _sys) \
do { \
sudo_debug_printf2(NULL, NULL, 0, (_sys) | SUDO_DEBUG_TRACE, \
"<- %s @ %s:%d", (_func), (_file), (_line)); \
} while (0)
# define sudo_debug_exit_int(_func, _file, _line, _sys, _ret) \
do { \
sudo_debug_printf2(NULL, NULL, 0, (_sys) | SUDO_DEBUG_TRACE, \
"<- %s @ %s:%d := %d", (_func), (_file), (_line), (_ret)); \
} while (0)
# define sudo_debug_exit_uint(_func, _file, _line, _sys, _ret) \
do { \
sudo_debug_printf2(NULL, NULL, 0, (_sys) | SUDO_DEBUG_TRACE, \
"<- %s @ %s:%d := %u", (_func), (_file), (_line), (_ret)); \
} while (0)
# define sudo_debug_exit_long(_func, _file, _line, _sys, _ret) \
do { \
sudo_debug_printf2(NULL, NULL, 0, (_sys) | SUDO_DEBUG_TRACE, \
"<- %s @ %s:%d := %ld", (_func), (_file), (_line), (_ret)); \
} while (0)
# define sudo_debug_exit_dev_t(_func, _file, _line, _sys, _ret) \
do { \
sudo_debug_printf2(NULL, NULL, 0, (_sys) | SUDO_DEBUG_TRACE, \
"<- %s @ %s:%d := %lu", (_func), (_file), (_line), \
(unsigned long)(_ret)); \
} while (0)
# if SIZEOF_ID_T == 8
# define sudo_debug_exit_id_t(_func, _file, _line, _sys, _ret) \
do { \
sudo_debug_printf2(NULL, NULL, 0, (_sys) | SUDO_DEBUG_TRACE, \
"<- %s @ %s:%d := %lld", (_func), (_file), (_line), (long long)(_ret));\
} while (0)
# else
# define sudo_debug_exit_id_t(_func, _file, _line, _sys, _ret) \
do { \
sudo_debug_printf2(NULL, NULL, 0, (_sys) | SUDO_DEBUG_TRACE, \
"<- %s @ %s:%d := %d", (_func), (_file), (_line), (int)(_ret)); \
} while (0)
# endif
# define sudo_debug_exit_size_t(_func, _file, _line, _sys, _ret) \
do { \
sudo_debug_printf2(NULL, NULL, 0, (_sys) | SUDO_DEBUG_TRACE, \
"<- %s @ %s:%d := %zu", (_func), (_file), (_line), (_ret)); \
} while (0)
# define sudo_debug_exit_ssize_t(_func, _file, _line, _sys, _ret) \
do { \
sudo_debug_printf2(NULL, NULL, 0, (_sys) | SUDO_DEBUG_TRACE, \
"<- %s @ %s:%d := %zd", (_func), (_file), (_line), (_ret)); \
} while (0)
# if SIZEOF_TIME_T == 8
# define sudo_debug_exit_time_t(_func, _file, _line, _sys, _ret) \
do { \
sudo_debug_printf2(NULL, NULL, 0, (_sys) | SUDO_DEBUG_TRACE, \
"<- %s @ %s:%d := %lld", (_func), (_file), (_line), (long long)(_ret));\
} while (0)
# else
# define sudo_debug_exit_time_t(_func, _file, _line, _sys, _ret) \
do { \
sudo_debug_printf2(NULL, NULL, 0, (_sys) | SUDO_DEBUG_TRACE, \
"<- %s @ %s:%d := %d", (_func), (_file), (_line), (int)(_ret)); \
} while (0)
# endif
# define sudo_debug_exit_mode_t(_func, _file, _line, _sys, _ret) \
do { \
sudo_debug_printf2(NULL, NULL, 0, (_sys) | SUDO_DEBUG_TRACE, \
"<- %s @ %s:%d := %d", (_func), (_file), (_line), (int)(_ret)); \
} while (0)
# define sudo_debug_exit_bool(_func, _file, _line, _sys, _ret) \
do { \
sudo_debug_printf2(NULL, NULL, 0, (_sys) | SUDO_DEBUG_TRACE, \
"<- %s @ %s:%d := %s", (_func), (_file), (_line), (_ret) ? "true": "false");\
} while (0)
# define sudo_debug_exit_str(_func, _file, _line, _sys, _ret) \
do { \
sudo_debug_printf2(NULL, NULL, 0, (_sys) | SUDO_DEBUG_TRACE, \
"<- %s @ %s:%d := %s", (_func), (_file), (_line), (_ret) ? (_ret) : "(null)");\
} while (0)
# define sudo_debug_exit_str_masked(_func, _file, _line, _sys, _ret) \
do { \
const char _stars[] = "********************************************************************************"; \
const size_t _len = (_ret) ? strlen(_ret) : sizeof("(null)") - 1; \
const char *_s = (_ret) ? _stars : "(null)"; \
sudo_debug_printf2(NULL, NULL, 0, (_sys) | SUDO_DEBUG_TRACE, \
"<- %s @ %s:%d := %.*s", (_func), (_file), (_line), (int)_len, _s);\
} while (0)
# define sudo_debug_exit_ptr(_func, _file, _line, _sys, _ret) \
do { \
sudo_debug_printf2(NULL, NULL, 0, (_sys) | SUDO_DEBUG_TRACE, \
"<- %s @ %s:%d := %p", (_func), (_file), (_line), (_ret)); \
} while (0)
#else /* FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION */
# define sudo_debug_enter(_a, _b, _c, _d) ((void)&(_d))
# define sudo_debug_exit(_a, _b, _c, _d) ((void)&(_d))
# define sudo_debug_exit_int(_a, _b, _c, _d, _e) ((void)&(_d))
# define sudo_debug_exit_uint(_a, _b, _c, _d, _e) ((void)&(_d))
# define sudo_debug_exit_long(_a, _b, _c, _d, _e) ((void)&(_d))
# define sudo_debug_exit_dev_t(_a, _b, _c, _d, _e) ((void)&(_d))
# define sudo_debug_exit_id_t(_a, _b, _c, _d, _e) ((void)&(_d))
# define sudo_debug_exit_size_t(_a, _b, _c, _d, _e) ((void)&(_d))
# define sudo_debug_exit_ssize_t(_a, _b, _c, _d, _e) ((void)&(_d))
# define sudo_debug_exit_time_t(_a, _b, _c, _d, _e) ((void)&(_d))
# define sudo_debug_exit_mode_t(_a, _b, _c, _d, _e) ((void)&(_d))
# define sudo_debug_exit_bool(_a, _b, _c, _d, _e) ((void)&(_d))
# define sudo_debug_exit_str(_a, _b, _c, _d, _e) ((void)&(_d))
# define sudo_debug_exit_str_masked(_a, _b, _c, _d, _e) ((void)&(_d))
# define sudo_debug_exit_ptr(_a, _b, _c, _d, _e) ((void)&(_d))
#endif /* FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION */
/*
* Wrappers for sudo_debug_exit() and friends.
*/
#define debug_return \
do { \
sudo_debug_exit(__func__, __FILE__, __LINE__, sudo_debug_subsys); \
return; \
} while (0)
#define debug_return_int(ret) \
do { \
int sudo_debug_ret = (ret); \
sudo_debug_exit_int(__func__, __FILE__, __LINE__, sudo_debug_subsys, \
sudo_debug_ret); \
return sudo_debug_ret; \
} while (0)
#define debug_return_uint(ret) \
do { \
unsigned int sudo_debug_ret = (ret); \
sudo_debug_exit_uint(__func__, __FILE__, __LINE__, sudo_debug_subsys, \
sudo_debug_ret); \
return sudo_debug_ret; \
} while (0)
#define debug_return_dev_t(ret) \
do { \
dev_t sudo_debug_ret = (ret); \
sudo_debug_exit_dev_t(__func__, __FILE__, __LINE__, sudo_debug_subsys,\
sudo_debug_ret); \
return sudo_debug_ret; \
} while (0)
#define debug_return_id_t(ret) \
do { \
id_t sudo_debug_ret = (ret); \
sudo_debug_exit_id_t(__func__, __FILE__, __LINE__, sudo_debug_subsys,\
sudo_debug_ret); \
return sudo_debug_ret; \
} while (0)
#define debug_return_size_t(ret) \
do { \
size_t sudo_debug_ret = (ret); \
sudo_debug_exit_size_t(__func__, __FILE__, __LINE__, sudo_debug_subsys,\
sudo_debug_ret); \
return sudo_debug_ret; \
} while (0)
#define debug_return_ssize_t(ret) \
do { \
ssize_t sudo_debug_ret = (ret); \
sudo_debug_exit_ssize_t(__func__, __FILE__, __LINE__, sudo_debug_subsys,\
sudo_debug_ret); \
return sudo_debug_ret; \
} while (0)
#define debug_return_time_t(ret) \
do { \
time_t sudo_debug_ret = (ret); \
sudo_debug_exit_time_t(__func__, __FILE__, __LINE__, sudo_debug_subsys,\
sudo_debug_ret); \
return sudo_debug_ret; \
} while (0)
#define debug_return_mode_t(ret) \
do { \
mode_t sudo_debug_ret = (ret); \
sudo_debug_exit_mode_t(__func__, __FILE__, __LINE__, sudo_debug_subsys,\
sudo_debug_ret); \
return sudo_debug_ret; \
} while (0)
#define debug_return_long(ret) \
do { \
long sudo_debug_ret = (ret); \
sudo_debug_exit_long(__func__, __FILE__, __LINE__, sudo_debug_subsys, \
sudo_debug_ret); \
return sudo_debug_ret; \
} while (0)
#define debug_return_bool(ret) \
do { \
bool sudo_debug_ret = (ret); \
sudo_debug_exit_bool(__func__, __FILE__, __LINE__, sudo_debug_subsys, \
sudo_debug_ret); \
return sudo_debug_ret; \
} while (0)
#define debug_return_str(ret) \
do { \
char *sudo_debug_ret = (ret); \
sudo_debug_exit_str(__func__, __FILE__, __LINE__, sudo_debug_subsys, \
sudo_debug_ret); \
return sudo_debug_ret; \
} while (0)
#define debug_return_const_str(ret) \
do { \
const char *sudo_debug_ret = (ret); \
sudo_debug_exit_str(__func__, __FILE__, __LINE__, sudo_debug_subsys, \
sudo_debug_ret); \
return sudo_debug_ret; \
} while (0)
#define debug_return_str_masked(ret) \
do { \
char *sudo_debug_ret = (ret); \
sudo_debug_exit_str_masked(__func__, __FILE__, __LINE__, \
sudo_debug_subsys, sudo_debug_ret); \
return sudo_debug_ret; \
} while (0)
#define debug_return_ptr(ret) \
do { \
void *sudo_debug_ret = (ret); \
sudo_debug_exit_ptr(__func__, __FILE__, __LINE__, sudo_debug_subsys, \
sudo_debug_ret); \
return sudo_debug_ret; \
} while (0)
#define debug_return_const_ptr(ret) \
do { \
const void *sudo_debug_ret = (ret); \
sudo_debug_exit_ptr(__func__, __FILE__, __LINE__, sudo_debug_subsys, \
sudo_debug_ret); \
return sudo_debug_ret; \
} while (0)
/*
* Variadic macros are a C99 feature but GNU cpp has supported
* a (different) version of them for a long time.
*/
#if defined(NO_VARIADIC_MACROS)
# define sudo_debug_printf sudo_debug_printf_nvm
#elif defined(__GNUC__) && __GNUC__ == 2
# define sudo_debug_printf(pri, fmt...) \
sudo_debug_printf2(__func__, __FILE__, __LINE__, (pri)|sudo_debug_subsys, \
fmt)
#else
# define sudo_debug_printf(pri, ...) \
sudo_debug_printf2(__func__, __FILE__, __LINE__, (pri)|sudo_debug_subsys, \
__VA_ARGS__)
#endif
#define sudo_debug_execve(pri, path, argv, envp) \
sudo_debug_execve2((pri)|sudo_debug_subsys, (path), (argv), (envp))
#define sudo_debug_write(fd, str, len, errnum) \
sudo_debug_write2(fd, NULL, NULL, 0, (str), (len), (errnum))
sudo_dso_public int sudo_debug_deregister_v1(int instance_id);
sudo_dso_public void sudo_debug_enter_v1(const char *func, const char *file, int line, unsigned int subsys);
sudo_dso_public void sudo_debug_execve2_v1(unsigned int level, const char *path, char *const argv[], char *const envp[]);
sudo_dso_public void sudo_debug_exit_v1(const char *func, const char *file, int line, unsigned int subsys);
sudo_dso_public void sudo_debug_exit_bool_v1(const char *func, const char *file, int line, unsigned int subsys, bool ret);
sudo_dso_public void sudo_debug_exit_int_v1(const char *func, const char *file, int line, unsigned int subsys, int ret);
sudo_dso_public void sudo_debug_exit_uint_v1(const char *func, const char *file, int line, unsigned int subsys, unsigned int ret);
sudo_dso_public void sudo_debug_exit_long_v1(const char *func, const char *file, int line, unsigned int subsys, long ret);
sudo_dso_public void sudo_debug_exit_ptr_v1(const char *func, const char *file, int line, unsigned int subsys, const void *ret);
sudo_dso_public void sudo_debug_exit_id_t_v1(const char *func, const char *file, int line, unsigned int subsys, id_t ret);
sudo_dso_public void sudo_debug_exit_size_t_v1(const char *func, const char *file, int line, unsigned int subsys, size_t ret);
sudo_dso_public void sudo_debug_exit_ssize_t_v1(const char *func, const char *file, int line, unsigned int subsys, ssize_t ret);
sudo_dso_public void sudo_debug_exit_str_v1(const char *func, const char *file, int line, unsigned int subsys, const char *ret);
sudo_dso_public void sudo_debug_exit_str_masked_v1(const char *func, const char *file, int line, unsigned int subsys, const char *ret);
sudo_dso_public void sudo_debug_exit_time_t_v1(const char *func, const char *file, int line, unsigned int subsys, time_t ret);
sudo_dso_public void sudo_debug_exit_mode_t_v1(const char *func, const char *file, int line, unsigned int subsys, mode_t ret);
sudo_dso_public pid_t sudo_debug_fork_v1(void);
sudo_dso_public int sudo_debug_get_active_instance_v1(void);
sudo_dso_public int sudo_debug_get_fds_v1(unsigned char **fds);
sudo_dso_public int sudo_debug_get_instance_v1(const char *program);
sudo_dso_public int sudo_debug_parse_flags_v1(struct sudo_conf_debug_file_list *debug_files, const char *entry);
sudo_dso_public void sudo_debug_printf2_v1(const char *func, const char *file, int line, unsigned int level, const char * restrict fmt, ...) sudo_printf0like(5, 6);
sudo_dso_public void sudo_debug_printf_nvm_v1(int pri, const char * restrict fmt, ...) sudo_printf0like(2, 3);
sudo_dso_public int sudo_debug_register_v1(const char *program, const char *const subsystems[], unsigned int ids[], struct sudo_conf_debug_file_list *debug_files);
sudo_dso_public int sudo_debug_register_v2(const char *program, const char *const subsystems[], unsigned int ids[], struct sudo_conf_debug_file_list *debug_files, int minfd);
sudo_dso_public int sudo_debug_set_active_instance_v1(int inst);
sudo_dso_public void sudo_debug_update_fd_v1(int ofd, int nfd);
sudo_dso_public void sudo_debug_vprintf2_v1(const char *func, const char *file, int line, unsigned int level, const char * restrict fmt, va_list ap) sudo_printf0like(5, 0);
sudo_dso_public void sudo_debug_write2_v1(int fd, const char *func, const char *file, int line, const char *str, unsigned int len, int errnum);
sudo_dso_public bool sudo_debug_needed_v1(unsigned int level);
#define sudo_debug_needed(level) sudo_debug_needed_v1((level)|sudo_debug_subsys)
#define sudo_debug_deregister(_a) sudo_debug_deregister_v1((_a))
#define sudo_debug_execve2(_a, _b, _c, _d) sudo_debug_execve2_v1((_a), (_b), (_c), (_d))
#define sudo_debug_fork() sudo_debug_fork_v1()
#define sudo_debug_get_active_instance() sudo_debug_get_active_instance_v1()
#define sudo_debug_get_fds(_a) sudo_debug_get_fds_v1((_a))
#define sudo_debug_get_instance(_a) sudo_debug_get_instance_v1((_a))
#define sudo_debug_parse_flags(_a, _b) sudo_debug_parse_flags_v1((_a), (_b))
#define sudo_debug_printf2 sudo_debug_printf2_v1
#define sudo_debug_printf_nvm sudo_debug_printf_nvm_v1
#define sudo_debug_register(_a, _b, _c, _d, _e) sudo_debug_register_v2((_a), (_b), (_c), (_d), (_e))
#define sudo_debug_set_active_instance(_a) sudo_debug_set_active_instance_v1((_a))
#define sudo_debug_update_fd(_a, _b) sudo_debug_update_fd_v1((_a), (_b))
#define sudo_debug_vprintf2(_a, _b, _c, _d, _e, _f) sudo_debug_vprintf2_v1((_a), (_b), (_c), (_d), (_e), (_f))
#define sudo_debug_write2(_a, _b, _c, _d, _e, _f, _g) sudo_debug_write2_v1((_a), (_b), (_c), (_d), (_e), (_f), (_g))
#endif /* SUDO_DEBUG_H */
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