134 lines
4.4 KiB
C
134 lines
4.4 KiB
C
/* 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 "is.h"
|
|
|
|
/* Set debugging level to 0, 1, or 2 to see no, some, all debug output. */
|
|
#define DEBUG_LEVEL 1
|
|
#define DPRINTF if (DEBUG_LEVEL > 0) printf
|
|
|
|
/* Allocate space for the global variables. */
|
|
message m_in; /* the input message itself */
|
|
message m_out; /* the output message used for reply */
|
|
int who; /* caller's proc number */
|
|
int callnr; /* system call number */
|
|
|
|
extern int errno; /* error number set by system library */
|
|
|
|
/* Declare some local functions. */
|
|
FORWARD _PROTOTYPE(void init_server, (void) );
|
|
FORWARD _PROTOTYPE(void get_work, (void) );
|
|
FORWARD _PROTOTYPE(void reply, (int whom, int result) );
|
|
|
|
/*===========================================================================*
|
|
* main *
|
|
*===========================================================================*/
|
|
PUBLIC void main(void)
|
|
{
|
|
/* 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;
|
|
sigset_t sigset;
|
|
|
|
/* Initialize the server, then go to work. */
|
|
init_server();
|
|
|
|
/* Main loop - get work and do it, forever. */
|
|
while (TRUE) {
|
|
|
|
/* Wait for incoming message, sets 'callnr' and 'who'. */
|
|
get_work();
|
|
|
|
switch (callnr) {
|
|
case SYS_EVENT:
|
|
sigset = (sigset_t) m_in.NOTIFY_ARG;
|
|
if (sigismember(&sigset, SIGTERM)) {
|
|
/* nothing to do on shutdown */
|
|
}
|
|
if (sigismember(&sigset, SIGKSTOP)) {
|
|
/* nothing to do on shutdown */
|
|
}
|
|
continue;
|
|
case FKEY_PRESSED:
|
|
result = do_fkey_pressed(&m_in);
|
|
break;
|
|
default: {
|
|
printf("Warning, IS got unexpected request %d from %d\n",
|
|
m_in.m_type, m_in.m_source);
|
|
result = EINVAL;
|
|
}
|
|
}
|
|
|
|
/* Finally send reply message, unless disabled. */
|
|
if (result != EDONTREPLY) {
|
|
reply(who, result);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
|
|
|
|
/*===========================================================================*
|
|
* init_server *
|
|
*===========================================================================*/
|
|
PRIVATE void init_server()
|
|
{
|
|
/* Initialize the information service. */
|
|
int fkeys, sfkeys;
|
|
int i, s;
|
|
struct sigaction sigact;
|
|
|
|
/* Install signal handler. Ask PM to transform signal into message. */
|
|
sigact.sa_handler = SIG_MESS;
|
|
sigact.sa_mask = ~0; /* block all other signals */
|
|
sigact.sa_flags = 0; /* default behaviour */
|
|
if (sigaction(SIGTERM, &sigact, NULL) != OK)
|
|
report("IS","warning, sigaction() failed", errno);
|
|
|
|
/* Set key mappings. IS takes all of F1-F12 and Shift+F1-F6 . */
|
|
fkeys = sfkeys = 0;
|
|
for (i=1; i<=12; i++) bit_set(fkeys, i);
|
|
for (i=1; i<= 6; i++) bit_set(sfkeys, i);
|
|
if ((s=fkey_map(&fkeys, &sfkeys)) != OK)
|
|
report("IS", "warning, sendrec failed:", s);
|
|
}
|
|
|
|
/*===========================================================================*
|
|
* get_work *
|
|
*===========================================================================*/
|
|
PRIVATE void get_work()
|
|
{
|
|
int status = 0;
|
|
status = receive(ANY, &m_in); /* this blocks until message arrives */
|
|
if (OK != status)
|
|
panic("IS","failed to receive message!", status);
|
|
who = m_in.m_source; /* message arrived! set sender */
|
|
callnr = m_in.m_type; /* set function call number */
|
|
}
|
|
|
|
|
|
/*===========================================================================*
|
|
* reply *
|
|
*===========================================================================*/
|
|
PRIVATE void reply(who, result)
|
|
int who; /* destination */
|
|
int result; /* report result to replyee */
|
|
{
|
|
int send_status;
|
|
m_out.m_type = result; /* build reply message */
|
|
send_status = send(who, &m_out); /* send the message */
|
|
if (OK != send_status)
|
|
panic("IS", "unable to send reply!", send_status);
|
|
}
|
|
|
|
|
|
|