/*-
 * Copyright (c) 1992, 1993
 *  The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *  This product includes software developed by the University of
 *  California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *  $Id: util.c,v 1.2 1994/09/24 02:56:57 davidg Exp $
 */

#ifndef lint
static char sccsid[] = "@(#)util.c  8.2 (Berkeley) 4/2/94";

#endif /* not lint */

#include <sys/param.h>
#include <sys/stat.h>
#include <dos.h>                 /* mheinz */

#include <ctype.h>
#include "err.h"
#include <errno.h>
#include "pathnames.h"
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include "extern.h"

char *
colon(cp)
     char *cp;
{
    static char separator[2]="";

    if (separator[0]=='\0') {
        if (GetVar("RCPSEPARATOR",separator,2,NULL)<=0)
            strcpy(separator,"!");
    }

    if (*cp == separator[0])
        /* Leading colon is part of file name. */
        return (0);

    for (; *cp; ++cp) {
    if (*cp == separator[0])
        return (cp);
    if (*cp == '/')
        return (0);
    }
    return (0);
}

void
verifydir(cp)
     char *cp;
{
    struct stat stb;

    if (!stat(cp, &stb)) {
    if (S_ISDIR(stb.st_mode))
        return;
    errno = ENOTDIR;
    }
    run_err("%s: %s", cp, strerror(errno));
    exit(1);
}

int
okname(cp0)
     char *cp0;
{
    int c;
    char *cp;

    cp = cp0;
    do {
    c = *cp;
    if (c & 0200)
        goto bad;
    if (!isalpha(c) && !isdigit(c) && c != '_' && c != '-')
        goto bad;
    } while (*++cp);
    return (1);

  bad:warn("%s: invalid user name", cp0);
    return (0);
}

int
susystem(s, userid)
     int userid;
     char *s;
{
    int error;

    error = system(s);
    if (error)
    err(stderr,"System Failed: %s\n", s);

    return error;
}

BUF *
allocbuf(bp, fd, blksize)
     BUF *bp;
     int fd, blksize;
{
    struct stat stb;
    size_t size;

    if (fstat(fd, &stb) < 0) {
    run_err("fstat: %s", strerror(errno));
    return (0);
    }
    size = roundup(stb.st_blksize, blksize);
    if (size == 0)
    size = blksize;
    if (bp->cnt >= size)
    return (bp);
    if ((bp->buf = realloc(bp->buf, size)) == NULL) {
    bp->cnt = 0;
    run_err("%s", strerror(errno));
    return (0);
    }
    bp->cnt = size;
    return (bp);
}

void
lostconn(signo)
     int signo;
{
    if (!iamremote)
    err(stderr,"lost connection\n");
    exit(1);
}