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/* System Information Service.
* This service handles the various debugging dumps, such as the process
* table, so that these no longer directly touch kernel memory. Instead, the
* system task is asked to copy some table in local memory.
*
* Created:
* Apr 29, 2004 by Jorrit N. Herder
*/
#include "inc.h"
#include <minix/endpoint.h>
/* Allocate space for the global variables. */
static message m_in; /* the input message itself */
static message m_out; /* the output message used for reply */
static endpoint_t who_e; /* caller's proc number */
static int callnr; /* system call number */
/* Declare some local functions. */
static void get_work(void);
static void reply(int whom, int result);
/* SEF functions and variables. */
static void sef_local_startup(void);
static int sef_cb_init_fresh(int type, sef_init_info_t *info);
static void sef_cb_signal_handler(int signo);
/*===========================================================================*
* main *
*===========================================================================*/
int main(int argc, char **argv)
{
/* This is the main routine of this service. The main loop consists of
* three major activities: getting new work, processing the work, and
* sending the reply. The loop never terminates, unless a panic occurs.
*/
int result;
/* SEF local startup. */
env_setargs(argc, argv);
sef_local_startup();
/* Main loop - get work and do it, forever. */
while (TRUE) {
/* Wait for incoming message, sets 'callnr' and 'who'. */
get_work();
if (is_notify(callnr)) {
switch (_ENDPOINT_P(who_e)) {
case TTY_PROC_NR:
result = do_fkey_pressed(&m_in);
break;
default:
/* FIXME: error message. */
result = EDONTREPLY;
break;
}
}
else {
printf("IS: warning, got illegal request %d from %d\n",
callnr, m_in.m_source);
result = EDONTREPLY;
}
/* Finally send reply message, unless disabled. */
if (result != EDONTREPLY) {
reply(who_e, result);
}
}
return(OK); /* shouldn't come here */
}
/*===========================================================================*
* sef_local_startup *
*===========================================================================*/
static void
sef_local_startup(void)
{
/* Register init callbacks. */
sef_setcb_init_fresh(sef_cb_init_fresh);
sef_setcb_init_lu(sef_cb_init_fresh);
sef_setcb_init_restart(sef_cb_init_fresh);
/* Register signal callbacks. */
sef_setcb_signal_handler(sef_cb_signal_handler);
/* Let SEF perform startup. */
sef_startup();
}
/*===========================================================================*
* sef_cb_init_fresh *
*===========================================================================*/
static int sef_cb_init_fresh(int UNUSED(type), sef_init_info_t *UNUSED(info))
{
/* Initialize the information server. */
/* Set key mappings. */
map_unmap_fkeys(TRUE /*map*/);
return(OK);
}
/*===========================================================================*
* sef_cb_signal_handler *
*===========================================================================*/
static void sef_cb_signal_handler(int signo)
{
/* Only check for termination signal, ignore anything else. */
if (signo != SIGTERM) return;
/* Shutting down. Unset key mappings, and quit. */
map_unmap_fkeys(FALSE /*map*/);
exit(0);
}
/*===========================================================================*
* get_work *
*===========================================================================*/
static void
get_work(void)
{
int status = 0;
status = sef_receive(ANY, &m_in); /* this blocks until message arrives */
if (OK != status)
panic("sef_receive failed!: %d", status);
who_e = m_in.m_source; /* message arrived! set sender */
callnr = m_in.m_type; /* set function call number */
}
/*===========================================================================*
* reply *
*===========================================================================*/
static void
reply(
int who, /* destination */
int result /* report result to replyee */
)
{
int send_status;
m_out.m_type = result; /* build reply message */
send_status = ipc_send(who, &m_out); /* send the message */
if (OK != send_status)
panic("unable to send reply!: %d", send_status);
}
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