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