usr/src/usr.sbin/sendmail/src/err.c

/*
 * Copyright (c) 1983 Eric P. Allman
 * Copyright (c) 1988 Regents of the University of California.
 * All rights reserved.
 *
 * %sccs.include.redist.c%
 */

#ifndef lint
static char sccsid[] = "@(#)err.c       5.17 (Berkeley) %G%";
#endif /* not lint */

# include "sendmail.h"
# include <errno.h>
# include <netdb.h>

/*
**  SYSERR -- Print error message.
**
**      Prints an error message via printf to the diagnostic
**      output.  If LOG is defined, it logs it also.
**
**      Parameters:
**              f -- the format string
**              a, b, c, d, e -- parameters
**
**      Returns:
**              none
**              Through TopFrame if QuickAbort is set.
**
**      Side Effects:
**              increments Errors.
**              sets ExitStat.
*/

# ifdef lint
int     sys_nerr;
char    *sys_errlist[];
# endif lint
char    MsgBuf[BUFSIZ*2];       /* text of most recent message */

static void fmtmsg();

/*VARARGS1*/
syserr(fmt VA_ARG_FORMAL)
        char *fmt;
        VA_ARG_DECL
{
        register char *p;
        int olderrno = errno;
        VA_LOCAL_DECL
        extern char Arpa_PSyserr[];
        extern char Arpa_TSyserr[];

        /* format and output the error message */
        if (olderrno == 0)
                p = Arpa_PSyserr;
        else
                p = Arpa_TSyserr;
        VA_START(fmt);
        fmtmsg(MsgBuf, (char *) NULL, p, olderrno, fmt, ap);
        VA_END;
        puterrmsg(MsgBuf);

        /* determine exit status if not already set */
        if (ExitStat == EX_OK)
        {
                if (olderrno == 0)
                        ExitStat = EX_SOFTWARE;
                else
                        ExitStat = EX_OSERR;
        }

# ifdef LOG
        if (LogLevel > 0)
                syslog(LOG_CRIT, "%s: SYSERR: %s",
                        CurEnv->e_id == NULL ? "NOQUEUE" : CurEnv->e_id,
                        &MsgBuf[4]);
# endif /* LOG */
        errno = 0;
        if (QuickAbort)
                longjmp(TopFrame, 2);
}
\f/*
**  USRERR -- Signal user error.
**
**      This is much like syserr except it is for user errors.
**
**      Parameters:
**              fmt, a, b, c, d -- printf strings
**
**      Returns:
**              none
**              Through TopFrame if QuickAbort is set.
**
**      Side Effects:
**              increments Errors.
*/

/*VARARGS1*/
usrerr(fmt VA_ARG_FORMAL)
        char *fmt;
        VA_ARG_DECL
{
        VA_LOCAL_DECL
        extern char SuprErrs;
        extern char Arpa_Usrerr[];
        extern int errno;

        if (SuprErrs)
                return;

        VA_START(fmt);
        fmtmsg(MsgBuf, CurEnv->e_to, Arpa_Usrerr, errno, fmt, ap);
        VA_END;
        puterrmsg(MsgBuf);

# ifdef LOG
        if (LogLevel > 1 && LogUsrErrs)
                syslog(LOG_NOTICE, "%s: %s",
                        CurEnv->e_id == NULL ? "NOQUEUE" : CurEnv->e_id,
                        &MsgBuf[4]);
# endif /* LOG */

        if (QuickAbort)
                longjmp(TopFrame, 1);
}
\f/*
**  MESSAGE -- print message (not necessarily an error)
**
**      Parameters:
**              num -- the default ARPANET error number (in ascii)
**              msg -- the message (printf fmt) -- if it begins
**                      with a digit, this number overrides num.
**              a, b, c, d, e -- printf arguments
**
**      Returns:
**              none
**
**      Side Effects:
**              none.
*/

/*VARARGS2*/
message(num, msg VA_ARG_FORMAL)
        char *num;
        char *msg;
        VA_ARG_DECL
{
        VA_LOCAL_DECL

        errno = 0;
        VA_START(msg);
        fmtmsg(MsgBuf, CurEnv->e_to, num, 0, msg, ap);
        VA_END;
        putmsg(MsgBuf, FALSE);
}
\f/*
**  NMESSAGE -- print message (not necessarily an error)
**
**      Just like "message" except it never puts the to... tag on.
**
**      Parameters:
**              num -- the default ARPANET error number (in ascii)
**              msg -- the message (printf fmt) -- if it begins
**                      with three digits, this number overrides num.
**              a, b, c, d, e -- printf arguments
**
**      Returns:
**              none
**
**      Side Effects:
**              none.
*/

/*VARARGS2*/
nmessage(num, msg VA_ARG_FORMAL)
        char *num;
        char *msg;
        VA_ARG_DECL
{
        VA_LOCAL_DECL

        errno = 0;
        VA_START(msg);
        fmtmsg(MsgBuf, (char *) NULL, num, 0, msg, ap);
        VA_END;
        putmsg(MsgBuf, FALSE);
}
\f/*
**  PUTMSG -- output error message to transcript and channel
**
**      Parameters:
**              msg -- message to output (in SMTP format).
**              holdmsg -- if TRUE, don't output a copy of the message to
**                      our output channel.
**
**      Returns:
**              none.
**
**      Side Effects:
**              Outputs msg to the transcript.
**              If appropriate, outputs it to the channel.
**              Deletes SMTP reply code number as appropriate.
*/

putmsg(msg, holdmsg)
        char *msg;
        bool holdmsg;
{
        /* output to transcript if serious */
        if (CurEnv->e_xfp != NULL && (msg[0] == '4' || msg[0] == '5'))
                fprintf(CurEnv->e_xfp, "%s\n", msg);

        /* output to channel if appropriate */
        if (!holdmsg && (Verbose || msg[0] != '0'))
        {
                (void) fflush(stdout);
                if (OpMode == MD_SMTP)
                        fprintf(OutChannel, "%s\r\n", msg);
                else
                        fprintf(OutChannel, "%s\n", &msg[4]);
                (void) fflush(OutChannel);
        }
}
\f/*
**  PUTERRMSG -- like putmsg, but does special processing for error messages
**
**      Parameters:
**              msg -- the message to output.
**
**      Returns:
**              none.
**
**      Side Effects:
**              Sets the fatal error bit in the envelope as appropriate.
*/

puterrmsg(msg)
        char *msg;
{
        /* output the message as usual */
        putmsg(msg, HoldErrs);

        /* signal the error */
        Errors++;
        if (msg[0] == '5')
                CurEnv->e_flags |= EF_FATALERRS;
}
\f/*
**  FMTMSG -- format a message into buffer.
**
**      Parameters:
**              eb -- error buffer to get result.
**              to -- the recipient tag for this message.
**              num -- arpanet error number.
**              en -- the error number to display.
**              fmt -- format of string.
**              a, b, c, d, e -- arguments.
**
**      Returns:
**              none.
**
**      Side Effects:
**              none.
*/

static void
fmtmsg(eb, to, num, eno, fmt, ap)
        register char *eb;
        char *to;
        char *num;
        int eno;
        char *fmt;
        va_list ap;
{
        char del;

        /* output the reply code */
        if (isdigit(fmt[0]) && isdigit(fmt[1]) && isdigit(fmt[2]))
        {
                num = fmt;
                fmt += 4;
        }
        if (num[3] == '-')
                del = '-';
        else
                del = ' ';
        (void) sprintf(eb, "%3.3s%c", num, del);
        eb += 4;

        /* output the file name and line number */
        if (FileName != NULL)
        {
                (void) sprintf(eb, "%s: line %d: ", FileName, LineNumber);
                eb += strlen(eb);
        }

        /* output the "to" person */
        if (to != NULL && to[0] != '\0')
        {
                (void) sprintf(eb, "%s... ", to);
                while (*eb != '\0')
                        *eb++ &= 0177;
        }

        /* output the message */
        (void) vsprintf(eb, fmt, ap);
        while (*eb != '\0')
                *eb++ &= 0177;

        /* output the error code, if any */
        if (eno != 0)
        {
                extern char *errstring();

                (void) sprintf(eb, ": %s", errstring(eno));
                eb += strlen(eb);
        }
}
\f/*
**  ERRSTRING -- return string description of error code
**
**      Parameters:
**              errno -- the error number to translate
**
**      Returns:
**              A string description of errno.
**
**      Side Effects:
**              none.
*/

char *
errstring(errno)
        int errno;
{
        extern char *sys_errlist[];
        extern int sys_nerr;
        static char buf[MAXLINE];
# ifdef SMTP
        extern char *SmtpPhase;
# endif /* SMTP */

# ifdef DAEMON
# ifdef ETIMEDOUT
        /*
        **  Handle special network error codes.
        **
        **      These are 4.2/4.3bsd specific; they should be in daemon.c.
        */

        switch (errno)
        {
          case ETIMEDOUT:
          case ECONNRESET:
                (void) strcpy(buf, sys_errlist[errno]);
                if (SmtpPhase != NULL)
                {
                        (void) strcat(buf, " during ");
                        (void) strcat(buf, SmtpPhase);
                }
                if (CurHostName != NULL)
                {
                        (void) strcat(buf, " with ");
                        (void) strcat(buf, CurHostName);
                }
                return (buf);

          case EHOSTDOWN:
                if (CurHostName == NULL)
                        break;
                (void) sprintf(buf, "Host %s is down", CurHostName);
                return (buf);

          case ECONNREFUSED:
                if (CurHostName == NULL)
                        break;
                (void) sprintf(buf, "Connection refused by %s", CurHostName);
                return (buf);

          case (TRY_AGAIN+MAX_ERRNO):
                (void) sprintf(buf, "Host Name Lookup Failure");
                return (buf);
        }
# endif
# endif

        if (errno > 0 && errno < sys_nerr)
                return (sys_errlist[errno]);

        (void) sprintf(buf, "Error %d", errno);
        return (buf);
}