/*
 * Copyright (c) 1998-2001 Sendmail, Inc. and its suppliers.
 *      All rights reserved.
 * Copyright (c) 1983, 1995-1997 Eric P. Allman.  All rights reserved.
 * Copyright (c) 1988, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * By using this file, you agree to the terms and conditions set
 * forth in the LICENSE file which can be found at the top level of
 * the sendmail distribution.
 *
 */

#include <sendmail.h>

SM_RCSID("@(#)$Id: sysexits.c,v 8.33.4.1 2002/09/09 02:42:37 gshapiro Exp $")

/*
**  DSNTOEXITSTAT -- convert DSN-style error code to EX_ style.
**
**      Parameters:
**              dsncode -- the text of the DSN-style code.
**
**      Returns:
**              The corresponding exit status.
*/

int
dsntoexitstat(dsncode)
        char *dsncode;
{
        int code2, code3;

        /* first the easy cases.... */
        if (*dsncode == '2')
                return EX_OK;
        if (*dsncode == '4')
                return EX_TEMPFAIL;

        /* reject other illegal values */
        if (*dsncode != '5')
                return EX_CONFIG;

        /* now decode the other two field parts */
        if (*++dsncode == '.')
                dsncode++;
        code2 = atoi(dsncode);
        while (*dsncode != '\0' && *dsncode != '.')
                dsncode++;
        if (*dsncode != '\0')
                dsncode++;
        code3 = atoi(dsncode);

        /* and do a nested switch to work them out */
        switch (code2)
        {
          case 0:       /* Other or Undefined status */
                return EX_UNAVAILABLE;

          case 1:       /* Address Status */
                switch (code3)
                {
                  case 0:       /* Other Address Status */
                        return EX_DATAERR;

                  case 1:       /* Bad destination mailbox address */
                  case 6:       /* Mailbox has moved, No forwarding address */
                        return EX_NOUSER;

                  case 2:       /* Bad destination system address */
                  case 8:       /* Bad senders system address */
                        return EX_NOHOST;

                  case 3:       /* Bad destination mailbox address syntax */
                  case 7:       /* Bad senders mailbox address syntax */
                        return EX_USAGE;

                  case 4:       /* Destination mailbox address ambiguous */
                        return EX_UNAVAILABLE;

                  case 5:       /* Destination address valid */
                        /* According to RFC1893, this can't happen */
                        return EX_CONFIG;
                }
                break;

          case 2:       /* Mailbox Status */
                switch (code3)
                {
                  case 0:       /* Other or Undefined mailbox status */
                  case 1:       /* Mailbox disabled, not accepting messages */
                  case 2:       /* Mailbox full */
                  case 4:       /* Mailing list expansion problem */
                        return EX_UNAVAILABLE;

                  case 3:       /* Message length exceeds administrative lim */
                        return EX_DATAERR;
                }
                break;

          case 3:       /* System Status */
                return EX_OSERR;

          case 4:       /* Network and Routing Status */
                switch (code3)
                {
                  case 0:       /* Other or undefined network or routing stat */
                        return EX_IOERR;

                  case 1:       /* No answer from host */
                  case 3:       /* Routing server failure */
                  case 5:       /* Network congestion */
                        return EX_TEMPFAIL;

                  case 2:       /* Bad connection */
                        return EX_IOERR;

                  case 4:       /* Unable to route */
                        return EX_PROTOCOL;

                  case 6:       /* Routing loop detected */
                        return EX_CONFIG;

                  case 7:       /* Delivery time expired */
                        return EX_UNAVAILABLE;
                }
                break;

          case 5:       /* Protocol Status */
                return EX_PROTOCOL;

          case 6:       /* Message Content or Media Status */
                return EX_UNAVAILABLE;

          case 7:       /* Security Status */
                return EX_DATAERR;
        }
        return EX_UNAVAILABLE;
}
/*
**  EXITSTAT -- convert EX_ value to error text.
**
**      Parameters:
**              excode -- rstatus which might consists of an EX_* value.
**
**      Returns:
**              The corresponding error text or the original string.
*/

char *
exitstat(excode)
        char *excode;
{
        char *c;
        int i;
        char *exitmsg;

        if (excode == NULL || *excode == '\0')
                return excode;
        i = (int) strtol(excode, &c, 10);
        if (*c != '\0')
                return excode;
        exitmsg = sm_sysexitmsg(i);
        if (exitmsg != NULL)
                return exitmsg;
        return excode;
}