text: /*-
   * 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.
   */
  
  #if 0
  #ifndef lint
  #if 0
  static char sccsid[] = "@(#)util.c	8.2 (Berkeley) 4/2/94";
  #endif
  static const char rcsid[] =
    "$FreeBSD: stable/10/crypto/heimdal/appl/rcp/util.c 233294 2012-03-22 08:48:42Z stas $";
  #endif /* not lint */
  #endif
  
  #include "rcp_locl.h"
  
  RCSID("$Id$");
  
  char *
  colon(cp)
  	char *cp;
  {
  	if (*cp == ':')		/* Leading colon is part of file name. */
  		return (0);
  
  	for (; *cp; ++cp) {
  		if (*cp == ':')
  			return (cp);
  		if (*cp == '/')
  			return (0);
  	}
  	return (0);
  }
  
  char *
  unbracket(char *cp)
  {
  	char *ep;
  
  	if (*cp == '[') {
  		ep = cp + (strlen(cp) - 1);
  		if (*ep == ']') {
  			*ep = '\0';
  			++cp;
  		}
  	}
  	return (cp);
  }
  
  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;
  	unsigned char *cp;
  
  	cp = (unsigned char *)cp0;
  	do {
  		c = *cp;
  		if (c & 0200)
  			goto bad;
  		if (!isalpha(c) && !isdigit(c) && c != '_' && c != '-')
  			goto bad;
  	} while (*++cp);
  	return (1);
  
  bad:	warnx("%s: invalid user name", cp0);
  	return (0);
  }
  
  int
  susystem(s)
  	char *s;
  {
  	void (*istat)(int), (*qstat)(int);
  	int status;
  	pid_t pid;
  
  	pid = fork();
  	switch (pid) {
  	case -1:
  		return (127);
  
  	case 0:
  		execl(_PATH_BSHELL, "sh", "-c", s, NULL);
  		_exit(127);
  	}
  	istat = signal(SIGINT, SIG_IGN);
  	qstat = signal(SIGQUIT, SIG_IGN);
  	if (waitpid(pid, &status, 0) < 0)
  		status = -1;
  	(void)signal(SIGINT, istat);
  	(void)signal(SIGQUIT, qstat);
  	return (status);
  }
  
  #ifndef roundup
  #define	roundup(x, y)	((((x)+((y)-1))/(y))*(y))
  #endif
  
  BUF *
  allocbuf(bp, fd, blksize)
  	BUF *bp;
  	int fd, blksize;
  {
  	struct stat stb;
  	size_t size;
  	char *p;
  
  	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 ((p = realloc(bp->buf, size)) == NULL) {
  		if (bp->buf)
  			free(bp->buf);
  		bp->buf = NULL;
  		bp->cnt = 0;
  		run_err("%s", strerror(errno));
  		return (0);
  	}
  	memset(p, 0, size);
  	bp->buf = p;
  	bp->cnt = size;
  	return (bp);
  }
  
  void
  lostconn(signo)
  	int signo;
  {
  	if (!iamremote)
  		warnx("lost connection");
  	exit(1);
  }
  