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/*
Shared versions of debug(), log(), etc.
*/
#include "includes.h"
RCSID("$OpenBSD: log.c,v 1.1 1999/11/10 23:36:44 markus Exp $");
#include "ssh.h"
#include "xmalloc.h"
/* Fatal messages. This function never returns. */
void
fatal(const char *fmt, ...)
{
va_list args;
va_start(args, fmt);
do_log(SYSLOG_LEVEL_FATAL, fmt, args);
va_end(args);
fatal_cleanup();
}
/* Error messages that should be logged. */
void
error(const char *fmt, ...)
{
va_list args;
va_start(args, fmt);
do_log(SYSLOG_LEVEL_ERROR, fmt, args);
va_end(args);
}
/* Log this message (information that usually should go to the log). */
void
log(const char *fmt, ...)
{
va_list args;
va_start(args, fmt);
do_log(SYSLOG_LEVEL_INFO, fmt, args);
va_end(args);
}
/* More detailed messages (information that does not need to go to the log). */
void
chat(const char *fmt, ...)
{
va_list args;
va_start(args, fmt);
do_log(SYSLOG_LEVEL_CHAT, fmt, args);
va_end(args);
}
/* Debugging messages that should not be logged during normal operation. */
void
debug(const char *fmt, ...)
{
va_list args;
va_start(args, fmt);
do_log(SYSLOG_LEVEL_DEBUG, fmt, args);
va_end(args);
}
/* Fatal cleanup */
struct fatal_cleanup
{
struct fatal_cleanup *next;
void (*proc)(void *);
void *context;
};
static struct fatal_cleanup *fatal_cleanups = NULL;
/* Registers a cleanup function to be called by fatal() before exiting. */
void
fatal_add_cleanup(void (*proc)(void *), void *context)
{
struct fatal_cleanup *cu;
cu = xmalloc(sizeof(*cu));
cu->proc = proc;
cu->context = context;
cu->next = fatal_cleanups;
fatal_cleanups = cu;
}
/* Removes a cleanup frunction to be called at fatal(). */
void
fatal_remove_cleanup(void (*proc)(void *context), void *context)
{
struct fatal_cleanup **cup, *cu;
for (cup = &fatal_cleanups; *cup; cup = &cu->next)
{
cu = *cup;
if (cu->proc == proc && cu->context == context)
{
*cup = cu->next;
xfree(cu);
return;
}
}
fatal("fatal_remove_cleanup: no such cleanup function: 0x%lx 0x%lx\n",
(unsigned long)proc, (unsigned long)context);
}
/* Cleanup and exit */
void
fatal_cleanup(void)
{
struct fatal_cleanup *cu, *next_cu;
static int called = 0;
if (called)
exit(255);
called = 1;
/* Call cleanup functions. */
for (cu = fatal_cleanups; cu; cu = next_cu)
{
next_cu = cu->next;
debug("Calling cleanup 0x%lx(0x%lx)",
(unsigned long)cu->proc, (unsigned long)cu->context);
(*cu->proc)(cu->context);
}
exit(255);
}
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