373a8eb586be5cd9e04d096a34126af98583f448
static char SccsId
[] = "@(#)main.c 3.40 %G%";
** SENDMAIL -- Post mail to a set of destinations.
** This is the basic mail router. All user mail programs should
** call this routine to actually deliver mail. Sendmail in
** turn calls a bunch of mail servers that do the real work of
** Sendmail is driven by tables defined in conf.c. This
** file will be different from system to system, but the rest
** of the code will be the same. This table could be read in,
** but it seemed nicer to have it compiled in, since deliver-
** mail will potentially be exercised a lot.
** /etc/sendmail [-f name] [-a] [-q] [-v] [-n] [-m] addr ...
** Positional Parameters:
** addr -- the address to deliver the mail to. There
** -f name The mail is from "name" -- used for
** the header in local mail, and to
** deliver reports of failures to.
** -r name Same as -f; however, this flag is
** reserved to indicate special processing
** for remote mail delivery as needed
** in the future. So, network servers
** -Ffullname Select what the full-name should be
** -a This mail should be in ARPANET std
** format (obsolete version).
** -am Called from an FTP "MAIL" command.
** -af Called from an FTP "MLFL" command.
** -n Don't do aliasing. This might be used
** when delivering responses, for
** -em Mail back a response if there was an
** error in processing. This should be
** used when the origin of this message
** -ew Write back a response if the user is
** still logged in, otherwise, act like
** -eq Don't print any error message (just
** -ep (default) Print error messages
** -ee Send BerkNet style errors. This
** is equivalent to MailBack except
** that it has gives zero return code
** (unless there were errors during
** returning). This used to be
** "EchoBack", but you know how the old
** -m In group expansion, send to the
** sender also (stands for the Mail metoo
** -i Do not terminate mail on a line
** -s Save UNIX-like "From" lines on the
** -v Give blow-by-blow description of
** everything that happens.
** -t Read "to" addresses from message.
** Looks at To:, Cc:, and Bcc: lines.
** -I Initialize the DBM alias files from
** the text format files.
** -Cfilename Use alternate configuration file.
** -Afilename Use alternate alias file.
** -DXvalue Define macro X to have value.
** As defined in <sysexits.h>.
** These codes are actually returned from the auxiliary
** mailers; it is their responsibility to make them
** LOG -- if set, everything is logged.
** Eric Allman, UCB/INGRES
char InFileName
[] = "/tmp/mailtXXXXXX";
char Transcript
[] = "/tmp/mailxXXXXXX";
int NextMailer
= 0; /* "free" index into Mailer struct */
extern char *AliasFile
; /* location of alias file */
extern char *ConfFile
; /* location of configuration file */
extern char *StatFile
; /* location of statistics summary */
bool verifyonly
= FALSE
; /* only verify names */
bool safecf
= TRUE
; /* this conf file is sys default */
char pbuf
[10]; /* holds pid */
char tbuf
[10]; /* holds "current" time */
char cbuf
[5]; /* holds hop count */
char dbuf
[30]; /* holds ctime(tbuf) */
char ybuf
[10]; /* holds tty id */
if (signal(SIGINT
, SIG_IGN
) != SIG_IGN
)
(void) signal(SIGINT
, finis
);
if (signal(SIGHUP
, SIG_IGN
) != SIG_IGN
)
(void) signal(SIGHUP
, finis
);
(void) signal(SIGTERM
, finis
);
setbuf(stdout
, (char *) NULL
);
if ((i
= open(DEBUGFILE
, 1)) > 0)
** Initialize and define basic system macros.
** Collect should be called first, so that the time
** corresponds to the time that the messages starts
** getting sent, rather than when it is first composed.
(void) sprintf(pbuf
, "%d", getpid());
(void) sprintf(cbuf
, "%d", HopCount
);
/* time as integer, unix time, arpa time */
(void) sprintf(tbuf
, "%ld", &CurTime
);
(void) strcpy(dbuf
, ctime(&CurTime
));
*index(dbuf
, '\n') = '\0';
p
= newstr(arpadate(dbuf
));
if (rindex(p
, '/') != NULL
)
while (--argc
> 0 && (p
= *++argv
)[0] == '-')
case 'r': /* obsolete -f flag */
case 'f': /* from address */
if (--argc
<= 0 || *p
== '-')
syserr("No \"from\" person");
syserr("More than one \"from\" person");
case 'F': /* set full name */
if (--argc
<= 0 || *p
== '-')
case 'h': /* hop count */
if (--argc
<= 0 || *p
< '0' || *p
> '9')
syserr("Bad hop count (%s)", p
);
case 'e': /* error message disposition */
case 'p': /* print errors normally */
case 'q': /* be silent about it */
(void) freopen("/dev/null", "w", stdout
);
case 'm': /* mail back */
case 'e': /* do berknet error processing */
case 'w': /* write back (or mail) */
printf("Version %s Debug %d\n", Version
, Debug
);
case 'D': /* redefine internal macro */
case 'C': /* select configuration file */
ConfFile
= "sendmail.cf";
case 'A': /* select alias file */
case 'n': /* don't alias */
case 'I': /* initialize alias DBM file */
case 'm': /* send to me too */
case 'i': /* don't let dot stop me */
case 'V': /* verify only */
case 'a': /* arpanet format */
case 'f': /* mail from file connection */
case 'm': /* mail over telnet connection */
case 's': /* save From lines in headers */
case 'v': /* give blow-by-blow description */
case 't': /* read recipients from message */
/* at Eric Schmidt's suggestion, this will not be an error....
syserr("Unknown flag %s", p);
... seems that upward compatibility will be easier. */
readcf(ConfFile
, safecf
);
(void) expand("$z/.mailcf", cfbuf
, &cfbuf
[sizeof cfbuf
- 1]);
if (access(cfbuf
, 2) == 0)
initaliases(AliasFile
, aliasinit
);
for (i
= 0; i
< MAXMAILERS
; i
++)
register struct mailer
*m
= Mailer
[i
];
printf("mailer %d: %s %s %o %s\n", i
, m
->m_name
,
m
->m_mailer
, m
->m_flags
, m
->m_from
);
if (locname == NULL || locname[0] == '\0')
extern struct passwd *getpwuid();
syserr("Who are you? (uid=%d)", uid);
extern struct passwd *getpwnam();
syserr("Who are you? (name=%s)", p);
if (p == NULL || p[0] == '\0' || pw == NULL)
/* extract full name from passwd file */
if ((fullname
== NULL
|| fullname
[0] == '\0') &&
pw
!= NULL
&& pw
->pw_gecos
!= NULL
)
buildfname(pw
->pw_gecos
, realname
, nbuf
);
if (ArpaMode
== ARPA_NONE
&& from
== NULL
&& nbuf
[0] != '\0')
if (fullname
!= NULL
&& fullname
[0] != '\0')
if (argc
<= 0 && !GrabTo
)
usrerr("Usage: /etc/sendmail [flags] addr...");
** The Hop count tells us how many times this message has
** been processed by sendmail. If it exceeds some
** fairly large threshold, then we assume that we have
** an infinite forwarding loop and die.
syserr("Infinite forwarding loop (%s->%s)", From
.q_paddr
, *argv
);
** Scan argv and deliver the message to everyone.
** Actually, suppress delivery if we are taking To:
** lines from the message.
/* if we have had errors sofar, drop out now */
if (Errors
> 0 && ExitStat
== EX_OK
)
if (ArpaMode
> ARPA_OLD
&& ExitStat
!= EX_OK
)
if (!verifyonly
|| GrabTo
)
Stat
.stat_nf
[From
.q_mailer
]++;
Stat
.stat_bf
[From
.q_mailer
] += kbytes(MsgSize
);
** Arrange that the person who is sending the mail
** will not be expanded (unless explicitly requested).
printf("From person = \"%s\"\n", From
.q_paddr
);
From
.q_flags
|= QDONTSEND
;
** Actually send everything.
** If verifying, just ack.
for (i
= 0; Mailer
[i
] != NULL
; i
++)
for (q
= Mailer
[i
]->m_sendq
; q
!= NULL
; q
= q
->q_next
)
if (!bitset(QDONTSEND
|QBADADDR
, q
->q_flags
))
if (q
->q_mailer
== MN_LOCAL
|| q
->q_mailer
== MN_PROG
)
message(Arpa_Info
, "deliverable");
message(Arpa_Info
, "queueable");
(void) deliver(q
, (fnptr
) NULL
);
static char *okmsg
= "Mail accepted";
extern char Arpa_Fmsg
[], Arpa_Mmsg
[];
message(Arpa_Fmsg
, okmsg
);
message(Arpa_Mmsg
, okmsg
);
** SETFROM -- set the person who this message is from
** Under certain circumstances allow the user to say who
** s/he is (using -f or -r). These are:
** 1. The user's uid is zero (root).
** 2. The user's login name is "network" (mail from
** 3. The user's login name is "uucp" (mail from the
** 4. The address the user is trying to claim has a
** "!" character in it (since #3 doesn't do it for
** us if we are dialing out).
** A better check to replace #3 & #4 would be if the
** effective uid is "UUCP" -- this would require me
** to rewrite getpwent to "grab" uucp as it went by,
** make getname more nasty, do another passwd file
** scan, or compile the UID of "UUCP" into the code,
** all of which are reprehensible.
** Assuming all of these fail, we figure out something
** from -- the person it is from.
** realname -- the actual person executing sendmail.
** If NULL, then take whoever we previously
** thought was the from person.
** sets sendmail's notion of who the from person is.
if (strcmp(realname
, "network") != 0 && strcmp(realname
, "uucp") != 0 &&
index(from
, '!') == NULL
&& getuid() != 0)
/* network sends -r regardless (why why why?) */
/* syserr("%s, you cannot use the -f flag", realname); */
if (from
== NULL
|| parse(from
, &From
, 0) == NULL
)
(void) parse(from
, &From
, 0);
From
.q_home
= getenv("HOME");
** Rewrite the from person to dispose of possible implicit
pvp
= prescan(from
, '\0');
syserr("cannot prescan from (%s)", from
);
cataddr(pvp
, frombuf
, sizeof frombuf
);
define('f', newstr(frombuf
));
** FINIS -- Clean up and exit.
/* mail back the transcript on errors */
(void) unlink(Transcript
);
(void) unlink(InFileName
);
** OPENXSCRPT -- Open transcript file
** Creates a transcript file for possible eventual mailing or
** Turns the standard output into a special file
(void) mktemp(Transcript
);
if (freopen(Transcript
, "w", stdout
) == NULL
)
syserr("Can't create %s", Transcript
);
(void) chmod(Transcript
, 0600);
setbuf(stdout
, (char *) NULL
);