/* $Header: /afs/athena.mit.edu/astaff/project/moiradev/repository/moira/afssync/sync.pc,v 1.7 2007-05-16 19:42:00 zacheiss Exp $
 *
 *
 *  (c) Copyright 1989 by the Massachusetts Institute of Technology.
 *  For copying and distribution information, please see the file
 *  <mit-copyright.h>.
 */

#include <mit-copyright.h>
#include <stdio.h>
#include <sys/file.h>
#include <string.h>

#include <rx/xdr.h>
#include "ptint.h"
#include "ptserver.h"
#include "pterror.h"

#include <moira.h>
#include <moira_site.h>
#include <ctype.h>

EXEC SQL INCLUDE sqlca;

EXEC SQL BEGIN DECLARE SECTION;
char db[33] = "moira";
EXEC SQL END DECLARE SECTION;

void do_passwd(void);
void do_groups(void);
void sqlerr(void);

#ifndef min
#define min(x,y)	((x) < (y) ? (x) : (y))
#endif
char *whoami = "sync";

int dbase_fd;

int ucount = 0;
int gcount = 0;
int kcount = 0;
int mcount = 0;

struct hash *users;
struct hash *groups;

struct member {
    struct entry *user;
    struct entry *group;
    struct member *unext;
    struct member *gnext;
};
struct entry {
    long id;
    struct member *members;
};

int main(int argc, char **argv)
{
    int status;
    long t;

    setvbuf(stdout, NULL, _IOLBF, BUFSIZ);

    if (argc > 2 && !strcmp(argv[1], "-db")) {
	strncpy(db, argv[2], sizeof(db)-1);
	argc -= 2;
	argv += 2;
    }
    if (argc != 2) {
	fprintf(stderr, "usage: %s [-db moira] outfile\n", whoami);
	exit(MR_ARGS);
    }

    dbase_fd = open(argv[1], O_RDWR|O_CREAT|O_TRUNC, 0660);
    if (dbase_fd < 0) {
	perror("opening data file");
	exit(1);
    }

    initialize_sms_error_table();
    initialize_pt_error_table();
    Initdb();					/* Initialize prdb */
    
    users = create_hash(10000);
    groups = create_hash(15000);

    EXEC SQL WHENEVER SQLERROR DO sqlerr();
    EXEC SQL CONNECT :db IDENTIFIED BY :db;

    do_passwd();
    do_groups();

    t = time(0);
    fprintf(stderr, "Done (%d users, %d groups, %d kerberos, %d members): %s",
	    ucount, gcount, kcount, mcount, ctime(&t));

    EXEC SQL COMMIT;

    exit(MR_SUCCESS);
}


void do_passwd(void)
{
    EXEC SQL BEGIN DECLARE SECTION;
    char login[9], name[33];
    int uid, id, status;
    EXEC SQL END DECLARE SECTION;

    long t;
    struct prentry tentry;
    struct entry *u;

    t = time(0);
    fprintf(stderr, "Doing users: %s", ctime(&t));

    EXEC SQL DECLARE u_cursor CURSOR FOR
	SELECT u.login, u.unix_uid, u.users_id
	FROM users u
	WHERE u.unix_uid > 0 AND (u.status = 1 OR u.status = 2)
	ORDER BY unix_uid;
    EXEC SQL OPEN u_cursor;
    while (1) {
	EXEC SQL FETCH u_cursor INTO :login, :uid, :id;
	if (sqlca.sqlcode != 0) break;
	
	lowercase(strtrim(login));

	if (FindByID(0,uid))
	    status = PRIDEXIST;
	else
	    status = CreateEntry(0,login,&uid,1	/*idflag*/,0/*gflag*/,
				 SYSADMINID	/*oid*/, SYSADMINID/*cid*/);
	if (status)
	    fprintf(stderr, "Error adding user %s uid %d: %s\n",
		    login, uid, error_message(status));
	else {
	    u = (struct entry *)malloc(sizeof(struct entry));
	    u->id = uid;
	    u->members = 0;
	    hash_store(users, id, u);
	    ucount++;
	}
    }
    EXEC SQL CLOSE u_cursor;
    return;
}



void do_groups(void)
{
    EXEC SQL BEGIN DECLARE SECTION;
    char name[33], string[129];
    int gid, id, lid, hide, ustatus;
    EXEC SQL END DECLARE SECTION;

    long status, pos;
    struct prentry gentry, uentry;
    struct entry *u, *g;
    struct member *m;
    struct bucket **p, *b;
    char namebuf[40];
    long aid, t;

    t = time(0);
    fprintf(stderr, "Doing groups: %s", ctime(&t));

    EXEC SQL DECLARE l_cursor CURSOR FOR
	SELECT l.name, l.gid, l.list_id, l.hidden
	FROM list l
	WHERE l.gid > 0 AND l.active != 0 AND l.grouplist != 0
	ORDER BY gid;
    EXEC SQL OPEN l_cursor;
    while (1) {
	EXEC SQL FETCH l_cursor INTO :name, :gid, :lid, :hide;
	if (sqlca.sqlcode != 0) break;
	
	lowercase(strtrim(name));
	sprintf(namebuf, "system:%s", name);
	aid = -gid;

	if (FindByID(0, aid))
	    status = PRIDEXIST;
	else
	    status = CreateEntry(0,namebuf,&aid,1 /*idflag*/,PRGRP/*gflag*/,
				 SYSADMINID	/*oid*/, SYSADMINID/*cid*/);
	if (status)
	    fprintf(stderr, "Error adding group %s id %d: %s\n",
		    namebuf, aid, error_message(status));

	if ((status==0 || status==PRIDEXIST) &&
	    (aid!=ANYUSERID && aid!=AUTHUSERID)) {

	    g = (struct entry *)malloc(sizeof(struct entry));
	    g->id = aid;
	    g->members = 0;
	    hash_store(groups, lid, g);
	    gcount++;

	    /* Set modes on hidden lists (S----) */
	    if (hide) {
		pos = FindByID(0, aid);
		status = pr_Read(0, 0, pos, &gentry, sizeof(gentry));
		if (!status) {
		    gentry.flags = htonl(PRGRP|PRACCESS|PRP_STATUS_ANY);
		    status = pr_Write(0, 0, pos, &gentry, sizeof(gentry));
		}
		if (status)
		    fprintf(stderr,
			    "Error setting flags on group %s: %s\n",
			    namebuf, error_message(status));
	    }
	}
    }
    EXEC SQL CLOSE l_cursor;

    t = time(0);
    fprintf(stderr, "Reading/preparing members: %s", ctime(&t));

    EXEC SQL DECLARE m_cursor CURSOR FOR
	SELECT m.list_id, m.member_id, m.member_type
	FROM imembers m
	ORDER BY member_id;
    EXEC SQL OPEN m_cursor;
    while (1) {
	EXEC SQL FETCH m_cursor INTO :lid, :id, :name;
	if (sqlca.sqlcode != 0) break;

	if (!(g = (struct entry *)hash_lookup(groups, lid)))
	    continue;

	strtrim(name);
	if (!strcmp(name, "USER")) {
	    if (u = (struct entry *)hash_lookup(users, id)) {
		m = (struct member *)malloc(sizeof(struct member));
		m->user = u;
		m->group = g;
		m->unext = u->members;
		m->gnext = g->members;
		u->members = g->members = m;
		mcount++;
	    }
	}
    }
    EXEC SQL CLOSE m_cursor;

    t = time(0);
    fprintf(stderr, "Doing members: %s", ctime(&t));

    /* Do the bulk of the membership quickly.
     * Add PRSIZE members into the user/group record.  After that, we
     * require the use of continuation records, but we assume this is
     * few enough that we do this the slow way (AddToEntry).
     */
    for (p = &(users->data[users->size - 1]); p >= users->data; p--) {
	for (b = *p; b; b = b->next) {
	    if ((u = (struct entry *)b->data)->members == 0)
		continue;
	    pos = FindByID(0, u->id);
	    pr_Read(0, 0, pos, &uentry, sizeof(uentry));
	    for (t=0, m=u->members; m && t<PRSIZE; m=m->unext, t++)
		uentry.entries[t] = htonl(m->group->id);
	    uentry.count = htonl(t);
	    pr_Write(0, 0, pos, &uentry, sizeof(uentry));
	    if (m) {
		pr_ReadEntry(0, 0, pos, &uentry);
		while (m) {
		    AddToEntry(0, &uentry, pos, m->group->id);
		    m = m->unext;
		}
	    }
	}
    }
    for (p = &(groups->data[groups->size - 1]); p >= groups->data; p--) {
	for (b = *p; b; b = b->next) {
	    if ((g = (struct entry *)b->data)->members == 0)
		continue;
	    pos = FindByID(0, g->id);
	    pr_Read(0, 0, pos, &gentry, sizeof(gentry));
	    for (t=0, m=g->members; m && t<PRSIZE; m=m->gnext, t++)
		gentry.entries[t] = htonl(m->user->id);
	    gentry.count = htonl(t);
	    pr_Write(0, 0, pos, &gentry, sizeof(gentry));
	    if (m) {
		pr_ReadEntry(0, 0, pos, &gentry);
		while (m) {
		    AddToEntry(0, &gentry, pos, m->user->id);
		    m = m->gnext;
		}
	    }
	}
    }
    return;
}

    
void sqlerr(void)
{
    char buf[256];
    int size=256, len=0;

    sqlglm(buf, &size, &len);
    buf[len]='\0';
    com_err(whoami, MR_DBMS_ERR, " code %d\n%s", sqlca.sqlcode, buf);
    exit(MR_DBMS_ERR);
}