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/**
* @file
*
* Support routines for the apol program that are faster/easier when
* written in C than in Tcl.
*
* @author Jeremy A. Mowery jmowery@tresys.com
* @author Jason Tang jtang@tresys.com
*
* Copyright (C) 2006-2007 Tresys Technology, LLC
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <config.h>
#include <ctype.h>
#include <errno.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <tcl.h>
#include <apol/policy.h>
#include <sefs/db.hh>
#include <sefs/filesystem.hh>
/** severity of most recent message */
int msg_level = INT_MAX;
/** pointer to most recent message string */
char *message = NULL;
/**
* Take the formated string, allocate space for it, and then write it
* the policy's msg_callback_arg. If there is already a string
* stored, then append to the string if the message level is equal to
* the previous one, overwrite the string if message level is less
* than previous, else ignore the message.
*/
static void apol_tcl_common_route(void *arg, int level, const char *fmt, va_list ap)
{
char *s, *t;
Tcl_Interp *interp = static_cast < Tcl_Interp * >(arg);
if (level == APOL_MSG_INFO && msg_level >= APOL_MSG_INFO)
{
/* generate an info event */
free(message);
message = NULL;
if (vasprintf(&s, fmt, ap) < 0)
{
fprintf(stderr, "%s\n", strerror(errno));
return;
}
message = s;
msg_level = level;
Tcl_Eval(interp, "Apol_Progress_Dialog::_update_message");
while (Tcl_DoOneEvent(TCL_IDLE_EVENTS | TCL_DONT_WAIT)) ;
}
else if (message == NULL || level < msg_level)
{
/* overwrite the existing stored message string with a
* new, higher priority message */
free(message);
message = NULL;
if (vasprintf(&s, fmt, ap) < 0)
{
fprintf(stderr, "%s\n", strerror(errno));
return;
}
message = s;
msg_level = level;
}
else if (level == msg_level)
{
/* append to existing error message */
if (vasprintf(&s, fmt, ap) < 0)
{
fprintf(stderr, "%s\n", strerror(errno));
return;
}
if (asprintf(&t, "%s\n%s", message, s) < 0)
{
free(s);
fprintf(stderr, "%s\n", strerror(errno));
return;
}
free(s);
free(message);
message = t;
}
}
void apol_tcl_clear_info_string(void)
{
if (message != NULL)
{
free(message);
message = NULL;
}
msg_level = INT_MAX;
}
void apol_tcl_route_apol_to_string(void *arg, const apol_policy_t * p
__attribute__ ((unused)), int level, const char *fmt, va_list ap)
{
apol_tcl_common_route(arg, level, fmt, ap);
}
void apol_tcl_route_sefs_to_string(void *arg, const sefs_fclist * s
__attribute__ ((unused)), int level, const char *fmt, va_list ap)
{
apol_tcl_common_route(arg, level, fmt, ap);
}
int apol_tcl_get_info_level(void)
{
return msg_level;
}
char *apol_tcl_get_info_string(void)
{
return message;
}
void apol_tcl_set_info_string(apol_policy_t * p, const char *s)
{
INFO(p, "%s", s);
}
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