1 /* System Information Service. 2 * This service handles the various debugging dumps, such as the process 3 * table, so that these no longer directly touch kernel memory. Instead, the 4 * system task is asked to copy some table in local memory. 5 * 6 * Created: 7 * Apr 29, 2004 by Jorrit N. Herder 8 */ 9 10 #include "inc.h" 11 #include <minix/endpoint.h> 12 13 /* Allocate space for the global variables. */ 14 static message m_in; /* the input message itself */ 15 static message m_out; /* the output message used for reply */ 16 static endpoint_t who_e; /* caller's proc number */ 17 static int callnr; /* system call number */ 18 19 /* Declare some local functions. */ 20 static void get_work(void); 21 static void reply(int whom, int result); 22 23 /* SEF functions and variables. */ 24 static void sef_local_startup(void); 25 static int sef_cb_init_fresh(int type, sef_init_info_t *info); 26 static void sef_cb_signal_handler(int signo); 27 28 /*===========================================================================* 29 * main * 30 *===========================================================================*/ 31 int main(int argc, char **argv) 32 { 33 /* This is the main routine of this service. The main loop consists of 34 * three major activities: getting new work, processing the work, and 35 * sending the reply. The loop never terminates, unless a panic occurs. 36 */ 37 int result; 38 39 /* SEF local startup. */ 40 env_setargs(argc, argv); 41 sef_local_startup(); 42 43 /* Main loop - get work and do it, forever. */ 44 while (TRUE) { 45 /* Wait for incoming message, sets 'callnr' and 'who'. */ 46 get_work(); 47 48 if (is_notify(callnr)) { 49 switch (_ENDPOINT_P(who_e)) { 50 case TTY_PROC_NR: 51 result = do_fkey_pressed(&m_in); 52 break; 53 default: 54 /* FIXME: error message. */ 55 result = EDONTREPLY; 56 break; 57 } 58 } 59 else { 60 printf("IS: warning, got illegal request %d from %d\n", 61 callnr, m_in.m_source); 62 result = EDONTREPLY; 63 } 64 65 /* Finally send reply message, unless disabled. */ 66 if (result != EDONTREPLY) { 67 reply(who_e, result); 68 } 69 } 70 return(OK); /* shouldn't come here */ 71 } 72 73 /*===========================================================================* 74 * sef_local_startup * 75 *===========================================================================*/ 76 static void sef_local_startup() 77 { 78 /* Register init callbacks. */ 79 sef_setcb_init_fresh(sef_cb_init_fresh); 80 sef_setcb_init_lu(sef_cb_init_fresh); 81 sef_setcb_init_restart(sef_cb_init_fresh); 82 83 /* Register live update callbacks. */ 84 sef_setcb_lu_prepare(sef_cb_lu_prepare_always_ready); 85 sef_setcb_lu_state_isvalid(sef_cb_lu_state_isvalid_standard); 86 87 /* Register signal callbacks. */ 88 sef_setcb_signal_handler(sef_cb_signal_handler); 89 90 /* Let SEF perform startup. */ 91 sef_startup(); 92 } 93 94 /*===========================================================================* 95 * sef_cb_init_fresh * 96 *===========================================================================*/ 97 static int sef_cb_init_fresh(int UNUSED(type), sef_init_info_t *UNUSED(info)) 98 { 99 /* Initialize the information server. */ 100 101 /* Set key mappings. */ 102 map_unmap_fkeys(TRUE /*map*/); 103 104 return(OK); 105 } 106 107 /*===========================================================================* 108 * sef_cb_signal_handler * 109 *===========================================================================*/ 110 static void sef_cb_signal_handler(int signo) 111 { 112 /* Only check for termination signal, ignore anything else. */ 113 if (signo != SIGTERM) return; 114 115 /* Shutting down. Unset key mappings, and quit. */ 116 map_unmap_fkeys(FALSE /*map*/); 117 118 exit(0); 119 } 120 121 /*===========================================================================* 122 * get_work * 123 *===========================================================================*/ 124 static void get_work() 125 { 126 int status = 0; 127 status = sef_receive(ANY, &m_in); /* this blocks until message arrives */ 128 if (OK != status) 129 panic("sef_receive failed!: %d", status); 130 who_e = m_in.m_source; /* message arrived! set sender */ 131 callnr = m_in.m_type; /* set function call number */ 132 } 133 134 /*===========================================================================* 135 * reply * 136 *===========================================================================*/ 137 static void reply(who, result) 138 int who; /* destination */ 139 int result; /* report result to replyee */ 140 { 141 int send_status; 142 m_out.m_type = result; /* build reply message */ 143 send_status = ipc_send(who, &m_out); /* send the message */ 144 if (OK != send_status) 145 panic("unable to send reply!: %d", send_status); 146 } 147 148 149