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When registering with the debug subsystem, the caller now passes

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in an arrary of ints that gets filled in with the subsytem IDs to
be used in debug_decl.
This commit is contained in:
Todd C. Miller
2014-10-23 06:36:50 -06:00
parent 8db5f29398
commit 5270ebf1f2
5 changed files with 109 additions and 77 deletions
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30
include/sudo_debug.h
View File

@@ -64,20 +64,20 @@ struct sudo_conf_debug_file_list;
* This includes subsystems in the sudoers plugin.
* Note: order must match sudo_debug_subsystems[]
*/
#define SUDO_DEBUG_MAIN ( 1<<16) /* sudo main() */
#define SUDO_DEBUG_UTIL ( 2<<16) /* utility functions */
#define SUDO_DEBUG_NETIF ( 3<<16) /* network interface functions */
#define SUDO_DEBUG_PLUGIN ( 4<<16) /* main plugin functions */
#define SUDO_DEBUG_EVENT ( 5<<16) /* event handling */
#define SUDO_DEBUG_ARGS ( 6<<16) /* command line argument processing */
#define SUDO_DEBUG_EXEC ( 7<<16) /* command execution */
#define SUDO_DEBUG_PTY ( 8<<16) /* pseudo-tty */
#define SUDO_DEBUG_UTMP ( 9<<16) /* utmp file ops */
#define SUDO_DEBUG_CONV (10<<16) /* user conversation */
#define SUDO_DEBUG_PCOMM (11<<16) /* plugin communications */
#define SUDO_DEBUG_EDIT (12<<16) /* sudoedit */
#define SUDO_DEBUG_SELINUX (13<<16) /* selinux */
#define SUDO_DEBUG_HOOKS (14<<16) /* hook functions */
#define SUDO_DEBUG_ARGS ( 1<<16) /* command line argument processing */
#define SUDO_DEBUG_CONV ( 2<<16) /* user conversation */
#define SUDO_DEBUG_EDIT ( 3<<16) /* sudoedit */
#define SUDO_DEBUG_EVENT ( 4<<16) /* event handling */
#define SUDO_DEBUG_EXEC ( 5<<16) /* command execution */
#define SUDO_DEBUG_HOOKS ( 6<<16) /* hook functions */
#define SUDO_DEBUG_MAIN ( 7<<16) /* sudo main() */
#define SUDO_DEBUG_NETIF ( 8<<16) /* network interface functions */
#define SUDO_DEBUG_PCOMM ( 9<<16) /* plugin communications */
#define SUDO_DEBUG_PLUGIN (10<<16) /* main plugin functions */
#define SUDO_DEBUG_PTY (11<<16) /* pseudo-tty */
#define SUDO_DEBUG_SELINUX (12<<16) /* selinux */
#define SUDO_DEBUG_UTIL (13<<16) /* utility functions */
#define SUDO_DEBUG_UTMP (14<<16) /* utmp file ops */
#define SUDO_DEBUG_ALL 0xffff0000 /* all subsystems */
/* Initializer for instance index to indicate that debugging is not setup. */
@@ -231,7 +231,7 @@ __dso_public int sudo_debug_get_fds(fd_set **fdsetp);
__dso_public int sudo_debug_get_instance(const char *program);
__dso_public void sudo_debug_printf2(const char *func, const char *file, int line, int level, const char *fmt, ...) __printf0like(5, 6);
__dso_public void sudo_debug_printf_nvm(int pri, const char *fmt, ...) __printf0like(2, 3);
__dso_public int sudo_debug_register(const char *program, const char *const subsystems[], int num_subsystems, struct sudo_conf_debug_file_list *debug_files);
__dso_public int sudo_debug_register(const char *program, const char *const subsystems[], int ids[], struct sudo_conf_debug_file_list *debug_files);
__dso_public int sudo_debug_set_default_instance(int inst);
__dso_public void sudo_debug_update_fd(int ofd, int nfd);
__dso_public void sudo_debug_vprintf2(const char *func, const char *file, int line, int level, const char *fmt, va_list ap) __printf0like(5, 0);

2
lib/util/sudo_conf.c
View File

@@ -352,7 +352,7 @@ set_debugging(const char *conf_file)
* Register debug instance for the main program, making it
* the default instance if one is not already set.
*/
instance = sudo_debug_register(progname, NULL, 0,
instance = sudo_debug_register(progname, NULL, NULL,
&debug_spec->debug_files);
if (sudo_debug_get_default_instance() == SUDO_DEBUG_INSTANCE_INITIALIZER)
sudo_debug_set_default_instance(instance);

82
lib/util/sudo_debug.c
View File

@@ -86,24 +86,24 @@ static const char *const sudo_debug_priorities[] = {
/* Note: this must match the order in sudo_debug.h */
static const char *const sudo_debug_default_subsystems[] = {
"main",
"util",
"netif",
"plugin",
"event",
"args",
"exec",
"pty",
"utmp",
"conv",
"pcomm",
"edit",
"selinux",
"event",
"exec",
"hooks",
"main",
"netif",
"pcomm",
"plugin",
"pty",
"selinux",
"util",
"utmp",
NULL
};
#define NUM_SUBSYSTEMS (sizeof(sudo_debug_default_subsystems) / sizeof(sudo_debug_default_subsystems[0]) - 1)
#define NUM_DEF_SUBSYSTEMS (sizeof(sudo_debug_default_subsystems) / sizeof(sudo_debug_default_subsystems[0]) - 1)
/*
* For multiple programs/plugins there is a per-program instance
@@ -119,7 +119,8 @@ SLIST_HEAD(sudo_debug_output_list, sudo_debug_output);
struct sudo_debug_instance {
char *program;
const char *const *subsystems;
int num_subsystems;
const int *subsystem_ids;
unsigned int max_subsystem;
struct sudo_debug_output_list outputs;
};
@@ -146,17 +147,17 @@ sudo_debug_new_output(struct sudo_debug_instance *instance,
{
char *buf, *cp, *subsys, *pri;
struct sudo_debug_output *output;
int i, j;
unsigned int i, j;
/* Create new output for the instance. */
/* XXX - reuse fd for existing filename? */
output = sudo_emalloc(sizeof(*output));
output->settings = sudo_emallocarray(instance->num_subsystems, sizeof(int));
output->settings = sudo_emallocarray(instance->max_subsystem + 1, sizeof(int));
output->filename = sudo_estrdup(debug_file->debug_file);
output->fd = -1;
/* Init per-subsystems settings to -1 since 0 is a valid priority. */
for (i = 0; i < instance->num_subsystems; i++)
for (i = 0; i <= instance->max_subsystem; i++)
output->settings[i] = -1;
/* Open debug file. */
@@ -196,11 +197,13 @@ sudo_debug_new_output(struct sudo_debug_instance *instance,
if (strcasecmp(pri, sudo_debug_priorities[i]) == 0) {
for (j = 0; instance->subsystems[j] != NULL; j++) {
if (strcasecmp(subsys, "all") == 0) {
output->settings[j] = i;
const int idx = SUDO_DEBUG_SUBSYS(instance->subsystem_ids[j]);
output->settings[idx] = i;
continue;
}
if (strcasecmp(subsys, instance->subsystems[j]) == 0) {
output->settings[j] = i;
const int idx = SUDO_DEBUG_SUBSYS(instance->subsystem_ids[j]);
output->settings[idx] = i;
break;
}
}
@@ -222,20 +225,22 @@ sudo_debug_new_output(struct sudo_debug_instance *instance,
*/
int
sudo_debug_register(const char *program, const char *const subsystems[],
int num_subsystems, struct sudo_conf_debug_file_list *debug_files)
int ids[], struct sudo_conf_debug_file_list *debug_files)
{
struct sudo_debug_instance *instance = NULL;
struct sudo_debug_output *output;
struct sudo_debug_file *debug_file;
int idx, free_idx = -1;
if (debug_files == NULL || num_subsystems < 0)
if (debug_files == NULL)
return -1;
/* Use default subsystem names if none are provided. */
if (subsystems == NULL || num_subsystems == 0) {
if (subsystems == NULL) {
subsystems = sudo_debug_default_subsystems;
num_subsystems = NUM_SUBSYSTEMS;
} else if (ids == NULL) {
/* If subsystems are specified we must have ids[] too. */
return -1;
}
/* Search for existing instance. */
@@ -252,6 +257,20 @@ sudo_debug_register(const char *program, const char *const subsystems[],
}
if (instance == NULL) {
unsigned int i, j, max_id = NUM_DEF_SUBSYSTEMS - 1;
/* Fill in subsystem name -> id mapping. */
for (i = 0; subsystems[i] != NULL; i++) {
/* Check default subsystems. */
for (j = 0; j < NUM_DEF_SUBSYSTEMS; j++) {
if (strcmp(subsystems[i], sudo_debug_default_subsystems[j]) == 0)
break;
}
if (j == NUM_DEF_SUBSYSTEMS)
j = ++max_id;
ids[i] = ((j + 1) << 16);
}
if (free_idx != -1)
idx = free_idx;
if (idx == SUDO_DEBUG_INSTANCE_MAX) {
@@ -266,11 +285,20 @@ sudo_debug_register(const char *program, const char *const subsystems[],
instance = sudo_emalloc(sizeof(*instance));
instance->program = sudo_estrdup(program);
instance->subsystems = subsystems;
instance->num_subsystems = num_subsystems;
instance->subsystem_ids = ids;
instance->max_subsystem = max_id;
SLIST_INIT(&instance->outputs);
sudo_debug_instances[idx] = instance;
if (idx == sudo_debug_num_instances)
sudo_debug_num_instances++;
} else {
/* Check for matching instance but different ids[]. */
if (ids != NULL && instance->subsystem_ids != ids) {
unsigned int i;
for (i = 0; subsystems[i] != NULL; i++)
ids[i] = instance->subsystem_ids[i];
}
}
TAILQ_FOREACH(debug_file, debug_files, entries) {
@@ -552,7 +580,8 @@ void
sudo_debug_vprintf2(const char *func, const char *file, int lineno, int level,
const char *fmt, va_list ap)
{
int buflen, idx, pri, subsys, saved_errno = errno;
int buflen, idx, pri, saved_errno = errno;
unsigned int subsys;
char static_buf[1024], *buf = static_buf;
struct sudo_debug_instance *instance;
struct sudo_debug_output *output;
@@ -587,7 +616,7 @@ sudo_debug_vprintf2(const char *func, const char *file, int lineno, int level,
SLIST_FOREACH(output, &instance->outputs, entries) {
/* Make sure we want debug info at this level. */
if (subsys < instance->num_subsystems && output->settings[subsys] >= pri) {
if (subsys <= instance->max_subsystem && output->settings[subsys] >= pri) {
va_copy(ap2, ap);
buflen = fmt ? vsnprintf(static_buf, sizeof(static_buf), fmt, ap) : 0;
if (buflen >= (int)sizeof(static_buf)) {
@@ -640,7 +669,8 @@ sudo_debug_printf2(const char *func, const char *file, int lineno, int level,
void
sudo_debug_execve2(int level, const char *path, char *const argv[], char *const envp[])
{
int buflen, idx, pri, subsys, saved_errno = errno;
int buflen, idx, pri, saved_errno = errno;
unsigned int subsys;
struct sudo_debug_instance *instance;
struct sudo_debug_output *output;
char * const *av;
@@ -673,7 +703,7 @@ sudo_debug_execve2(int level, const char *path, char *const argv[], char *const
sudo_warnx_nodebug("%s: unregistered instance index %d", __func__, idx);
goto out;
}
if (subsys >= instance->num_subsystems)
if (subsys > instance->max_subsystem)
goto out;
/* XXX - use static buffer if possible */

31
plugins/sudoers/sudoers_debug.c
View File

@@ -46,29 +46,32 @@
int sudoers_debug_instance = SUDO_DEBUG_INSTANCE_INITIALIZER;
static const char *const sudoers_debug_subsystems[] = {
"main",
"util",
"netif",
"plugin",
"event",
"audit",
"ldap",
"match",
"parser",
static const char *const sudoers_subsystem_names[] = {
"alias",
"defaults",
"audit",
"auth",
"defaults",
"env",
"event",
"ldap",
"logging",
"main",
"match",
"netif",
"nss",
"rbtree",
"parser",
"perms",
"plugin",
"rbtree",
"sssd",
"util",
NULL
};
#define NUM_SUBSYSTEMS (sizeof(sudoers_debug_subsystems) / sizeof(sudoers_debug_subsystems[0]) - 1)
#define NUM_SUBSYSTEMS (sizeof(sudoers_subsystem_names) / sizeof(sudoers_subsystem_names[0]) - 1)
/* Subsystem IDs assigned at registration time. */
int sudoers_subsystem_ids[NUM_SUBSYSTEMS];
/*
* Parse the "filename flags,..." debug_flags entry and insert a new
@@ -116,7 +119,7 @@ sudoers_debug_register(struct sudo_conf_debug_file_list *debug_files,
if (!TAILQ_EMPTY(debug_files)) {
if (plugin_path != NULL) {
sudoers_debug_instance = sudo_debug_register(plugin_path,
sudoers_debug_subsystems, NUM_SUBSYSTEMS, debug_files);
sudoers_subsystem_names, sudoers_subsystem_ids, debug_files);
}
TAILQ_FOREACH_SAFE(debug_file, debug_files, entries, debug_next) {
TAILQ_REMOVE(debug_files, debug_file, entries);

41
plugins/sudoers/sudoers_debug.h
View File

@@ -21,27 +21,26 @@
/*
* Sudoers debug subsystems.
* The first five entries must match the sudo front end.
* Note: order must match sudoers_debug_subsystems[]
* Note that sudoers_subsystem_ids[] is filled in at debug registration time.
*/
#define SUDOERS_DEBUG_MAIN ( 1<<16) /* main() */
#define SUDOERS_DEBUG_UTIL ( 2<<16) /* utility functions */
#define SUDOERS_DEBUG_NETIF ( 3<<16) /* network interface functions */
#define SUDOERS_DEBUG_PLUGIN ( 4<<16) /* main plugin functions */
#define SUDOERS_DEBUG_EVENT ( 5<<16) /* event handling */
#define SUDOERS_DEBUG_AUDIT ( 6<<16) /* audit */
#define SUDOERS_DEBUG_LDAP ( 7<<16) /* sudoers LDAP */
#define SUDOERS_DEBUG_MATCH ( 8<<16) /* sudoers matching */
#define SUDOERS_DEBUG_PARSER ( 9<<16) /* sudoers parser */
#define SUDOERS_DEBUG_ALIAS (10<<16) /* sudoers alias functions */
#define SUDOERS_DEBUG_DEFAULTS (11<<16) /* sudoers defaults settings */
#define SUDOERS_DEBUG_AUTH (12<<16) /* authentication functions */
#define SUDOERS_DEBUG_ENV (13<<16) /* environment handling */
#define SUDOERS_DEBUG_LOGGING (14<<16) /* logging functions */
#define SUDOERS_DEBUG_NSS (15<<16) /* network service switch */
#define SUDOERS_DEBUG_RBTREE (16<<16) /* red-black tree functions */
#define SUDOERS_DEBUG_PERMS (17<<16) /* uid/gid swapping functions */
#define SUDOERS_DEBUG_SSSD (18<<16) /* sudoers SSSD */
#define SUDOERS_DEBUG_ALL 0xffff0000 /* all subsystems */
extern int sudoers_subsystem_ids[];
#define SUDOERS_DEBUG_ALIAS (sudoers_subsystem_ids[ 0]) /* sudoers alias functions */
#define SUDOERS_DEBUG_AUDIT (sudoers_subsystem_ids[ 1]) /* audit */
#define SUDOERS_DEBUG_AUTH (sudoers_subsystem_ids[ 2]) /* authentication functions */
#define SUDOERS_DEBUG_DEFAULTS (sudoers_subsystem_ids[ 3]) /* sudoers defaults settings */
#define SUDOERS_DEBUG_ENV (sudoers_subsystem_ids[ 4]) /* environment handling */
#define SUDOERS_DEBUG_EVENT (sudoers_subsystem_ids[ 5]) /* event handling */
#define SUDOERS_DEBUG_LDAP (sudoers_subsystem_ids[ 6]) /* sudoers LDAP */
#define SUDOERS_DEBUG_LOGGING (sudoers_subsystem_ids[ 7]) /* logging functions */
#define SUDOERS_DEBUG_MAIN (sudoers_subsystem_ids[ 8]) /* main() */
#define SUDOERS_DEBUG_MATCH (sudoers_subsystem_ids[ 9]) /* sudoers matching */
#define SUDOERS_DEBUG_NETIF (sudoers_subsystem_ids[10]) /* network interface functions */
#define SUDOERS_DEBUG_NSS (sudoers_subsystem_ids[11]) /* network service switch */
#define SUDOERS_DEBUG_PARSER (sudoers_subsystem_ids[12]) /* sudoers parser */
#define SUDOERS_DEBUG_PERMS (sudoers_subsystem_ids[13]) /* uid/gid swapping functions */
#define SUDOERS_DEBUG_PLUGIN (sudoers_subsystem_ids[14]) /* main plugin functions */
#define SUDOERS_DEBUG_RBTREE (sudoers_subsystem_ids[15]) /* red-black tree functions */
#define SUDOERS_DEBUG_SSSD (sudoers_subsystem_ids[16]) /* sudoers SSSD */
#define SUDOERS_DEBUG_UTIL (sudoers_subsystem_ids[17]) /* utility functions */
#endif /* _SUDOERS_DEBUG_H */