#include <Kerberos/com_err.h>
#include <Kerberos/KerberosDebug.h>
#include "kim_string_private.h"
#include <CoreFoundation/CoreFoundation.h>
#include "com_err_threads.h"
#define UNKNOWN_ERROR_FORMAT "Unknown error code: %ld"
#define UNKNOWN_ERROR_MAX_SIZE 256
#define UNKNOWN_ERROR_MESSAGE "Unknown error"
#define REENTER_ERROR_MESSAGE "Cannot generate error string. Re-entered error_message."
#define MESSAGE_KEY_FORMAT "KEMessage %ld"
#define MAX_KEY_LENGTH 256
#define MAX_ERROR_MESSAGE_SIZE BUFSIZ
#define ERROR_TABLE_SIZE_INCREMENT 10
#define ERRCODE_RANGE 8
#define BITS_PER_CHAR 6
#pragma mark -
errcode_t add_error_table (const struct error_table *et)
{
error_table_array_t error_tables = NULL;
errcode_t lock_err = com_err_thread_lock_error_tables (&error_tables);
errcode_t err = lock_err;
if (!err) {
if (et == NULL) { err = EINVAL; }
}
if (!err) {
if ((error_tables->count + 1) > error_tables->size) {
const struct error_table **new_ets = NULL;
size_t new_size = error_tables->size + ERROR_TABLE_SIZE_INCREMENT;
new_ets = realloc (error_tables->ets, (sizeof (char *)) * new_size);
if (new_ets == NULL) {
err = ENOMEM;
} else {
error_tables->ets = new_ets;
error_tables->size = new_size;
}
}
}
if (!err) {
error_tables->ets[error_tables->count] = et;
error_tables->count++;
}
if (!lock_err) { com_err_thread_unlock_error_tables (&error_tables); }
return err;
}
errcode_t remove_error_table (const struct error_table *et)
{
error_table_array_t error_tables = NULL;
errcode_t lock_err = com_err_thread_lock_error_tables (&error_tables);
errcode_t err = lock_err;
size_t etindex = 0;
if (!err) {
if (et == NULL) { err = EINVAL; }
}
if (!err) {
int found = false;
size_t i;
for (i = 0; i < error_tables->count; i++) {
if (error_tables->ets[i] == et) {
etindex = i;
found = true;
}
}
if (!found) { err = EINVAL; }
}
if (!err) {
memmove (&error_tables->ets[etindex], &error_tables->ets[etindex + 1],
((error_tables->count - 1) - etindex) * sizeof (struct error_table **));
error_tables->count--;
}
if (!lock_err) { com_err_thread_unlock_error_tables (&error_tables); }
return err;
}
#pragma mark -
static errcode_t create_cstring (const char *in_string, char **out_string)
{
errcode_t err = 0;
if (in_string == NULL) { err = EINVAL; }
if (out_string == NULL) { err = EINVAL; }
if (!err) {
*out_string = malloc (strlen (in_string) + 1);
if (*out_string == NULL) { err = ENOMEM; }
}
if (!err) {
strcpy (*out_string, in_string);
}
#ifdef KERBEROSCOMERR_DEBUG
dprintf ("%s: returning string '%s' for string '%s' (err = %d)",
__FUNCTION__, err ? "(null)" : *out_string, in_string, err);
#endif
return err;
}
static errcode_t create_unknown_error_message (errcode_t in_code,
char **out_string)
{
errcode_t err = 0;
if (!err) {
char unknownError[UNKNOWN_ERROR_MAX_SIZE];
snprintf (unknownError, UNKNOWN_ERROR_MAX_SIZE,
UNKNOWN_ERROR_FORMAT, in_code);
unknownError[UNKNOWN_ERROR_MAX_SIZE - 1] = '\0';
err = create_cstring (unknownError, out_string);
}
#ifdef KERBEROSCOMERR_DEBUG
dprintf ("%s: returning string '%s' for code %ld (err = %d)",
__FUNCTION__, err ? "(null)" : *out_string, in_code, err);
#endif
return err;
}
const char *error_message (errcode_t code)
{
errcode_t err = 0;
errcode_t enter_err = 0;
char *message = NULL;
int reentered = 0;
kim_library_init();
if (!err) {
enter_err = com_err_thread_entering_error_message (&reentered);
if (!enter_err && reentered) {
message = REENTER_ERROR_MESSAGE;
} else {
err = enter_err;
}
}
if (!err && !message) {
error_table_array_t error_tables = NULL;
errcode_t lock_err = com_err_thread_lock_error_tables (&error_tables);
if (!lock_err) {
size_t i;
for (i = 0; i < error_tables->count; i++) {
const struct error_table *et = error_tables->ets[i];
int32_t offset = code - et->base;
int32_t max = et->base + et->count - 1;
if (((code >= et->base) && (code <= max)) &&
(et->messages[offset] != NULL) &&
(strlen (et->messages[offset]) > 0)) {
err = kim_os_string_create_localized ((kim_string *) &message,
et->messages[offset]);
#ifdef KERBEROSCOMERR_DEBUG
dprintf ("%s: returning string '%s' for code %ld (err = %d)",
__FUNCTION__,
err ? "(null)" : message, in_code, err);
#endif
break;
}
}
}
if (!lock_err) { com_err_thread_unlock_error_tables (&error_tables); }
}
if (!err && !message && (code > 0) && (code < ELAST)) {
err = create_cstring (strerror (code), &message);
}
if (!err && !message) {
err = create_unknown_error_message (code, &message);
}
if (!err) {
err = com_err_thread_set_error_message (message);
}
#ifdef KERBEROSCOMERR_DEBUG
dprintf ("%s: returning message '%s'", __FUNCTION__,
err ? UNKNOWN_ERROR_MESSAGE : message);
#endif
if (!enter_err && !reentered) { com_err_thread_leaving_error_message (); }
return err ? UNKNOWN_ERROR_MESSAGE : message ;
}
#pragma mark -
static void default_com_err_proc (const char *progname,
errcode_t code,
const char *format,
va_list args)
{
if (progname) {
fputs (progname, stderr);
fputs (": ", stderr);
}
if (code) {
fputs (error_message (code), stderr);
fputs (" ", stderr);
}
if (format) {
vfprintf(stderr, format, args);
}
putc ('\r', stderr);
putc ('\n', stderr);
fflush (stderr);
}
void com_err_va (const char *progname, errcode_t code, const char *format, va_list args)
{
errcode_t err = 0;
com_err_handler_t handler = NULL;
if (!err) {
err = com_err_thread_get_com_err_hook (&handler);
}
if (!err) {
if (handler == NULL) { handler = default_com_err_proc; }
(*handler) (progname, code, format, args);
}
}
void com_err (const char *progname,
errcode_t code,
const char *format, ...)
{
va_list pvar;
va_start (pvar, format);
com_err_va (progname, code, format, pvar);
va_end (pvar);
}
com_err_handler_t set_com_err_hook (com_err_handler_t new_proc)
{
errcode_t err = 0;
com_err_handler_t handler = NULL;
if (!err) {
err = com_err_thread_get_com_err_hook (&handler);
}
if (!err) {
err = com_err_thread_set_com_err_hook (new_proc);
}
return err ? NULL : handler;
}
com_err_handler_t reset_com_err_hook (void)
{
return set_com_err_hook (NULL);
}