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/* Can't include krb5.h here, or k5-int.h which includes it, because
krb5.h needs to be generated with error tables, after util/et,
which builds after this directory. */
#include <stdarg.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include "k5-err.h"
#include "k5-thread.h"
#include "k5-platform.h"
#include "supp-int.h"
#ifdef USE_KIM
#include "kim_string_private.h"
#endif
/* It would be nice to just use error_message() always. Pity that
it's defined in a library that depends on this one, and we're not
allowed to make circular dependencies. */
/* We really want a rwlock here, since we should hold it while calling
the function and copying out its results. But I haven't
implemented shims for rwlock yet. */
static k5_mutex_t krb5int_error_info_support_mutex =
K5_MUTEX_PARTIAL_INITIALIZER;
static const char *(KRB5_CALLCONV *fptr)(long); /* = &error_message */
int
krb5int_err_init (void)
{
return k5_mutex_finish_init (&krb5int_error_info_support_mutex);
}
#define initialize() krb5int_call_thread_support_init()
#define lock() k5_mutex_lock(&krb5int_error_info_support_mutex)
#define unlock() k5_mutex_unlock(&krb5int_error_info_support_mutex)
void
krb5int_set_error (struct errinfo *ep, long code, const char *fmt, ...)
{
va_list args;
va_start (args, fmt);
krb5int_vset_error (ep, code, fmt, args);
va_end (args);
}
void
krb5int_vset_error (struct errinfo *ep, long code,
const char *fmt, va_list args)
{
va_list args2;
char *str = NULL;
const char *loc_fmt = NULL;
#ifdef USE_KIM
/* Try to localize the format string */
if (kim_os_string_create_localized(&loc_fmt, fmt) != KIM_NO_ERROR) {
loc_fmt = fmt;
}
#else
loc_fmt = fmt;
#endif
/* try vasprintf first */
va_copy(args2, args);
if (vasprintf(&str, loc_fmt, args2) < 0) {
str = NULL;
}
va_end(args2);
/* If that failed, try using scratch_buf */
if (str == NULL) {
vsnprintf(ep->scratch_buf, sizeof(ep->scratch_buf), loc_fmt, args);
str = strdup(ep->scratch_buf); /* try allocating again */
}
/* free old string before setting new one */
if (ep->msg && ep->msg != ep->scratch_buf) {
free ((char *) ep->msg);
ep->msg = NULL;
}
ep->code = code;
ep->msg = str ? str : ep->scratch_buf;
#ifdef USE_KIM
if (loc_fmt != fmt) { kim_string_free(&loc_fmt); }
#else
if (loc_fmt != fmt) { free((char *) loc_fmt); }
#endif
}
const char *
krb5int_get_error (struct errinfo *ep, long code)
{
char *r, *r2;
if (code == ep->code && ep->msg) {
r = strdup(ep->msg);
if (r == NULL) {
strlcpy(ep->scratch_buf, _("Out of memory"),
sizeof(ep->scratch_buf));
r = ep->scratch_buf;
}
return r;
}
if (initialize() != 0) {
strncpy(ep->scratch_buf, _("Kerberos library initialization failure"),
sizeof(ep->scratch_buf));
ep->scratch_buf[sizeof(ep->scratch_buf)-1] = 0;
ep->msg = NULL;
return ep->scratch_buf;
}
if (lock())
goto no_fptr;
if (fptr == NULL) {
unlock();
no_fptr:
#ifdef HAVE_STRERROR_R
if (strerror_r (code, ep->scratch_buf, sizeof(ep->scratch_buf)) == 0) {
char *p = strdup(ep->scratch_buf);
if (p)
return p;
return ep->scratch_buf;
}
/* If strerror_r didn't work with the 1K buffer, we can try a
really big one. This seems kind of gratuitous though. */
#define BIG_ERR_BUFSIZ 8192
r = malloc(BIG_ERR_BUFSIZ);
if (r) {
if (strerror_r (code, r, BIG_ERR_BUFSIZ) == 0) {
r2 = realloc (r, 1 + strlen(r));
if (r2)
return r2;
return r;
}
free (r);
}
#endif
r = strerror (code);
if (r) {
if (strlen (r) < sizeof (ep->scratch_buf)
|| (r2 = strdup (r)) == NULL) {
strncpy (ep->scratch_buf, r, sizeof(ep->scratch_buf));
return ep->scratch_buf;
} else
return r2;
}
format_number:
snprintf (ep->scratch_buf, sizeof(ep->scratch_buf),
_("error %ld"), code);
return ep->scratch_buf;
}
r = (char *) fptr(code);
if (r == NULL) {
unlock();
goto format_number;
}
r2 = strdup(r);
if (r2 == NULL) {
strncpy(ep->scratch_buf, r, sizeof(ep->scratch_buf));
unlock();
return ep->scratch_buf;
} else {
unlock();
return r2;
}
}
void
krb5int_free_error (struct errinfo *ep, const char *msg)
{
if (msg != ep->scratch_buf)
free ((char *) msg);
}
void
krb5int_clear_error (struct errinfo *ep)
{
krb5int_free_error (ep, ep->msg);
ep->msg = NULL;
}
void
krb5int_set_error_info_callout_fn (const char *(KRB5_CALLCONV *f)(long))
{
initialize();
if (lock() == 0) {
fptr = f;
unlock();
}
}
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