/* $Id: dbck.pc,v 1.8 2005-09-20 22:03:18 zacheiss Exp $
 *
 * Moira database consistency checker
 *
 * (c) Copyright 1988-1998 by the Massachusetts Institute of Technology.
 * For copying and distribution information, please see the file
 * <mit-copyright.h>.
 */

#include <mit-copyright.h>
#include <moira.h>
#include "dbck.h"

#include <signal.h>
#include <stdio.h>
#include <stdlib.h>

EXEC SQL INCLUDE sqlca;
EXEC SQL INCLUDE sqlda;

RCSID("$Header: /afs/athena.mit.edu/astaff/project/moiradev/repository/moira/dbck/dbck.pc,v 1.8 2005-09-20 22:03:18 zacheiss Exp $");

int debug = 0;
int mode = MODE_ASK;
int fast = 0;
int warn = 1;
int abort_p = 0;
struct hash *users, *machines, *clusters, *lists, *filesys, *nfsphys;
struct hash *strings, *members, *subnets, *string_dups, *printservers;
struct hash *containers;
EXEC SQL BEGIN DECLARE SECTION;
int dcmenable;
EXEC SQL END DECLARE SECTION;
struct save_queue *modtables;
SQLDA *mr_sqlda;

void interrupt(void);
extern SQLDA *sqlald(int, int, int);
extern void sqlglm(char *, unsigned int *, unsigned int *);

int main(int argc, char **argv)
{
  char **arg = argv;
  EXEC SQL BEGIN DECLARE SECTION;
  char *database;
  EXEC SQL END DECLARE SECTION;
  struct sigaction sa;

  database = "moira";
  setvbuf(stdout, NULL, _IOLBF, BUFSIZ);

  while (++arg - argv < argc)
    {
      if (**arg == '-')
	{
	  switch ((*arg)[1])
	    {
	    case 'd':
	      debug = atoi((*arg)[2] ? *arg + 2 : *++arg);
	      break;
	    case 'n':
	      mode = MODE_NO;
	      break;
	    case 'y':
	      mode = MODE_YES;
	      break;
	    case 'p':
	      mode = MODE_PREEN;
	      break;
	    case 'a':
	      mode = MODE_ASK;
	      break;
	    case 'f':
	      fast++;
	      break;
	    case 'w':
	      warn = 0;
	      break;
	    default:
	      printf("Usage: %s [-d level] [-n] [-y] [-p] [-a] [-f] [-w] [database]\n",
		     argv[0]);
	      exit(1);
	    }
	}
      else
	database = *arg;
    }
  if (fast)
    printf("Doing fast version (skipping some checks)\n");
  if (mode == MODE_NO)
    printf("Will NOT modify the database\n");
  else if (mode == MODE_PREEN)
    printf("Will fix simple things without asking\n");
  else if (mode == MODE_YES)
    printf("Will fix everything without asking\n");
  if (debug)
    printf("Debug level is %d\n", debug);

  sa.sa_handler = interrupt;
  sa.sa_flags = 0;
  sigemptyset(&sa.sa_mask);
  sigaction(SIGHUP, &sa, NULL);
  sigaction(SIGQUIT, &sa, NULL);
  sigaction(SIGINT, &sa, NULL);

  modtables = sq_create();
  mr_sqlda = sqlald(1, 255, 0);

  EXEC SQL WHENEVER SQLERROR DO dbmserr();
  printf("Opening database %s...", database);
  fflush(stdout);
  EXEC SQL CONNECT :database IDENTIFIED BY :database;
  printf("done\n");
  if (mode != MODE_NO)
    {
      EXEC SQL SELECT value INTO :dcmenable FROM numvalues
	WHERE name = 'dcm_enable';
      dprintf("DCM disabled (was %d)\n", dcmenable);
      EXEC SQL UPDATE numvalues SET value = 0 WHERE name = 'dcm_enable';
    }

  /* Begin transaction here. */

  phase1();
  EXEC SQL COMMIT WORK;
  phase2();
  EXEC SQL COMMIT WORK;
  phase3();
  EXEC SQL COMMIT WORK;
  phase4();
  EXEC SQL COMMIT WORK;

  if (mode != MODE_NO)
    cleanup();
  printf("Done.\n");
  exit(0);
}

void dbmserr(void)
{
  EXEC SQL BEGIN DECLARE SECTION;
  char buf[256];
  EXEC SQL END DECLARE SECTION;
  int bufsize = 256, msglength = 0;

  if (sqlca.sqlcode == 1403)
    return;
  printf("A DBMS error occurred, code %ld\n", sqlca.sqlcode);
  sqlglm(buf, &bufsize, &msglength);
  buf[msglength] = '\0';
  printf("%s\n", buf);
  printf("Aborting...\n");
  if (!abort_p)
    {
      abort_p++;
      EXEC SQL ROLLBACK WORK;
    }
  exit(1);
}


void interrupt(void)
{
  printf("Signal caught\n");
  if (prompt("Save database changes"))
    {
      EXEC SQL COMMIT WORK;
      cleanup();
      exit(0);
    }
  printf("Aborting transaction\n");
  if (!abort_p)
    {
      abort_p++;
      EXEC SQL ROLLBACK WORK;
    }

  EXEC SQL UPDATE numvalues SET value = :dcmenable
    WHERE name = 'dcm_enable';

  exit(0);
}


void modified(char *table)
{
  sq_save_unique_string(modtables, table);
}

void cleanup(void)
{
  EXEC SQL BEGIN DECLARE SECTION;
  char *tab;
  EXEC SQL END DECLARE SECTION;

  while (sq_get_data(modtables, &tab))
    {
      EXEC SQL UPDATE tblstats SET modtime = SYSDATE
	WHERE table_name = :tab;
    }
  EXEC SQL UPDATE numvalues SET value = :dcmenable
    WHERE name = 'dcm_enable';
}


void out_of_mem(char *msg)
{
  fprintf(stderr, "Out of memory while %s\n", msg);
  if (prompt("Save database changes"))
    {
      EXEC SQL COMMIT WORK;
      cleanup();
      exit(1);
    }
  printf("Aborting transaction\n");
  EXEC SQL ROLLBACK WORK;
  exit(1);
}