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/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/*
* 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"
/*
* 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 */
/* Fallback error message if we cannot allocate a copy of the real one. */
static char *oom_msg = "Out of memory";
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
k5_set_error(struct errinfo *ep, long code, const char *fmt, ...)
{
va_list args;
va_start(args, fmt);
k5_vset_error(ep, code, fmt, args);
va_end(args);
}
void
k5_vset_error(struct errinfo *ep, long code, const char *fmt, va_list args)
{
char *str, *slash;
k5_clear_error(ep);
ep->code = code;
if (vasprintf(&str, fmt, args) < 0)
return;
ep->msg = str;
}
static inline const char *
oom_check(const char *str)
{
return (str == NULL) ? oom_msg : str;
}
const char *
k5_get_error(struct errinfo *ep, long code)
{
const char *r;
char buf[128];
if (code == ep->code && ep->msg != NULL)
return oom_check(strdup(ep->msg));
if (initialize())
return oom_check(strdup(_("Kerberos library initialization failure")));
lock();
if (fptr == NULL) {
unlock();
if (strerror_r(code, buf, sizeof(buf)) == 0)
return oom_check(strdup(buf));
return oom_check(strdup(strerror(code)));
}
r = fptr(code);
#ifndef HAVE_COM_ERR_INTL
/* Translate com_err results here if libcom_err won't do it. */
r = _(r);
#endif
if (r == NULL) {
unlock();
snprintf(buf, sizeof(buf), _("error %ld"), code);
return oom_check(strdup(buf));
}
r = strdup(r);
unlock();
return oom_check(r);
}
void
k5_free_error(struct errinfo *ep, const char *msg)
{
if (msg != oom_msg)
free((char *)msg);
}
void
k5_clear_error(struct errinfo *ep)
{
k5_free_error(ep, ep->msg);
ep->msg = NULL;
}
void
k5_set_error_info_callout_fn(const char *(KRB5_CALLCONV *f)(long))
{
initialize();
lock();
fptr = f;
unlock();
}
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