text: /*-
   * Copyright (c) 2007-2010 Varnish Software AS
   * All rights reserved.
   *
   * Author: Dag-Erling Smørgrav <des@des.no>
   *
   * 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.
   *
   * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
   *
   * XXX: NB: also used in libvarnishapi
   */
  
  #include "config.h"
  
  #include <errno.h>
  #include <limits.h>
  #include <stdio.h>
  #include <string.h>
  #include <unistd.h>
  
  #include "libvarnish.h"
  #include "vsm.h"
  #include "vin.h"
  
  int
  VIN_N_Arg(const char *n_arg, char **name, char **dir, char **vsl)
  {
  	char nm[PATH_MAX];
  	char dn[PATH_MAX];
  
  
  	/* First: determine the name */
  
  	if (n_arg == NULL || *n_arg == '\0') {
  		if (gethostname(nm, sizeof nm) != 0)
  			return (-1);
  	} else if (strlen(n_arg) >= sizeof nm) {
  		/* preliminary length check to avoid overflowing nm */
  		errno = ENAMETOOLONG;
  		return (-1);
  	} else
  		bprintf(nm, "%s", n_arg);
  
  
  	/* Second: find the directory name */
  
  	if (*nm == '/')
  		strcpy(dn, nm);
  	else if (strlen(VARNISH_STATE_DIR) + 1 + strlen(nm) >= sizeof dn){
  		/* preliminary length check to avoid overflowing dm */
  		errno = ENAMETOOLONG;
  		return (-1);
  	} else {
  		bprintf(dn, "%s/%s", VARNISH_STATE_DIR, nm);
  	}
  
  	/* Definitive length check */
  	if (strlen(dn) + 1 + strlen(VSM_FILENAME) >= sizeof dn) {
  		errno = ENAMETOOLONG;
  		return (-1);
  	}
  
  	strcat(dn, "/");
  
  	if (name != NULL) {
  		*name = strdup(nm);
  		if (*name == NULL)
  			return (-1);
  	}
  	if (dir != NULL) {
  		*dir = strdup(dn);
  		if (*dir == NULL)
  			return (-1);
  	}
  	if (vsl != NULL) {
  		bprintf(nm, "%s%s", dn, VSM_FILENAME);
  		*vsl = strdup(nm);
  		if (*vsl == NULL)
  			return (-1);
  	}
  	return (0);
  }
  