/*
 *  SEQ.C
 *
 *  $Header: Beta:src/uucp/src/lib/RCS/seq.c,v 1.1 90/02/02 12:08:40 dillon Exp Locker: dillon $
 *
 *  (C) Copyright 1989-1990 by Matthew Dillon,  All Rights Reserved.
 *
 *  Returns a unique sequence number
 */

#include <stdio.h>
#include "config.h"

Prototype int GetSequence(int);

int
GetSequence(bump)
int bump;
{
    char *seqLockFile = "seq";
    FILE *fp;
    char *fileName = MakeConfigPath(UULIB, "seq");
    int seq;
    char buf[32];

    LockFile(seqLockFile);
    fp = fopen(fileName, "r");
    if (fp) {
	fgets(buf, 32, fp);
	seq = atoi(buf);
	fclose(fp);
    } else {
	perror(fileName);
	seq = -1;
    }

    if (bump && seq > 0) {
	fp = fopen(fileName, "w");
	if (fp) {
	    fprintf(fp,"%d", seq + bump);
	    fclose(fp);
	} else {
	    perror(fileName);
	    seq = -1;
	}
    }
    UnLockFile(seqLockFile);
    return(seq);
}