//
// errors.c - error & help routines
//
// Written by Eryk Vershen
//

/*
* Copyright 1996,1997,1998 by Apple Computer, Inc.
*              All Rights Reserved
*
* Permission to use, copy, modify, and distribute this software and
* its documentation for any purpose and without fee is hereby granted,
* provided that the above copyright notice appears in all copies and
* that both the copyright notice and this permission notice appear in
* supporting documentation.
*
* APPLE COMPUTER DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE.
*
* IN NO EVENT SHALL APPLE COMPUTER BE LIABLE FOR ANY SPECIAL, INDIRECT, OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
* LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT,
* NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/

// for *printf()
#include <stdio.h>
#include <errno.h>

// for exit()
#ifndef __linux__
#include <stdlib.h>
#endif
// for strrchr
#include <string.h>

// for va_start(), etc.
#include <stdarg.h>

#include "errors.h"


//
// Defines
//


//
// Types
//


//
// Global Constants
//


//
// Global Variables
//
char *program_name;
#ifdef NeXT
extern int errno;
extern int sys_nerr;
extern const char * const sys_errlist[];
#endif


//
// Forward declarations
//


//
// Routines
//
void
init_program_name(char **argv)
{
#if defined(__linux__) || defined(__unix__)
   if ((program_name = strrchr(argv[0], '/')) != (char *)NULL) {
       program_name++;
   } else {
       program_name = argv[0];
   }
#else
   program_name = "pdisk";
#endif
}


void
do_help(void)
{
   printf("\t%s [-h|--help]\n", program_name);
   printf("\t%s [-v|--version]\n", program_name);
#ifdef __linux__
   printf("\t%s [-l|--list [name]] [...]\n", program_name);
#else
   printf("\t%s [-l|--list] name [...]\n", program_name);
#endif
   printf("\t%s [-r|--readonly] name ...\n", program_name);
   printf("\t%s [-i|--interactive]\n", program_name);
   printf("\t%s name [...]\n", program_name);
/*
       {"debug",       no_argument,            0,      'd'},
       {"abbr",        no_argument,            0,      'a'},
       {"fs",          no_argument,            0,      'f'},
       {"logical",     no_argument,            0,      kLogicalOption},
       {"compute_size", no_argument,           0,      'c'},
*/
}


void
usage(const char *kind)
{
   error(-1, "bad usage - %s\n", kind);
   hflag = 1;
}


//
// Print a message on standard error and exit with value.
// Values in the range of system error numbers will add
// the perror(3) message.
//
void
fatal(int value, const char *fmt, ...)
{
   va_list ap;

   fprintf(stderr, "%s: ", program_name);
   va_start(ap, fmt);
   vfprintf(stderr, fmt, ap);
   va_end(ap);

#if defined(__linux__) || defined(NeXT) || defined(__unix__)
   if (value > 0 && value < sys_nerr) {
       fprintf(stderr, "  (%s)\n", sys_errlist[value]);
   } else {
       fprintf(stderr, "\n");
   }
#else
   fprintf(stderr, "\n");
   printf("Processing stopped: Choose 'Quit' from the file menu to quit.\n\n");
#endif
   exit(value);
}


//
// Print a message on standard error.
// Values in the range of system error numbers will add
// the perror(3) message.
//
void
error(int value, const char *fmt, ...)
{
   va_list ap;

   fprintf(stderr, "%s: ", program_name);
   va_start(ap, fmt);
   vfprintf(stderr, fmt, ap);
   va_end(ap);

#if defined(__linux__) || defined(NeXT) || defined(__unix__)
   if (value > 0 && value < sys_nerr) {
       fprintf(stderr, "  (%s)\n", sys_errlist[value]);
   } else {
       fprintf(stderr, "\n");
   }
#else
   fprintf(stderr, "\n");
#endif
}