+++ /dev/null
-
-/*
- * sendmail.c -- nmh sendmail interface
- *
- * $Id$
- */
-
-#include <h/mh.h>
-#include <mts/smtp/smtp.h>
-#include <mts/generic/mts.h>
-#include <signal.h>
-#include "h/signals.h" /* for SIGNAL() */
-#ifdef MPOP
-#include <errno.h>
-#endif
-
-/*
- * This module implements an interface to SendMail very similar
- * to the MMDF mm_(3) routines. The sm_() routines herein talk
- * SMTP to a sendmail process, mapping SMTP reply codes into
- * RP_-style codes.
- */
-
-/*
- * On older 4.2BSD machines without the POSIX function `sigaction',
- * the alarm handing stuff for time-outs will NOT work due to the way
- * syscalls get restarted. This is not really crucial, since SendMail
- * is generally well-behaved in this area.
- */
-
-#ifdef SENDMAILBUG
-/*
- * It appears that some versions of Sendmail will return Code 451
- * when they don't really want to indicate a failure.
- * "Code 451 almost always means sendmail has deferred; we don't
- * really want bomb out at this point since sendmail will rectify
- * things later." So, if you define SENDMAILBUG, Code 451 is
- * considered the same as Code 250. Yuck!
- */
-#endif
-
-#define TRUE 1
-#define FALSE 0
-
-#define NBITS ((sizeof (int)) * 8)
-
-/*
- * these codes must all be different!
- */
-#define SM_OPEN 90 /* Changed from 30 in case of nameserver flakiness */
-#define SM_HELO 20
-#define SM_RSET 15
-#define SM_MAIL 40
-#define SM_RCPT 120
-#define SM_DATA 20
-#define SM_TEXT 150
-#define SM_DOT 180
-#define SM_QUIT 30
-#define SM_CLOS 10
-
-static int sm_addrs = 0;
-static int sm_alarmed = 0;
-static int sm_child = NOTOK;
-static int sm_debug = 0;
-static int sm_nl = TRUE;
-static int sm_verbose = 0;
-
-static FILE *sm_rfp = NULL;
-static FILE *sm_wfp = NULL;
-
-#ifdef MPOP
-static int sm_ispool = 0;
-static char sm_tmpfil[BUFSIZ];
-#endif /* MPOP */
-
-static char *sm_noreply = "No reply text given";
-static char *sm_moreply = "; ";
-
-struct smtp sm_reply; /* global... */
-
-static int doingEHLO;
-
-#define MAXEHLO 20
-char *EHLOkeys[MAXEHLO + 1];
-
-/*
- * static prototypes
- */
-static int sm_ierror (char *fmt, ...);
-static int smtalk (int time, char *fmt, ...);
-static int sm_wrecord (char *, int);
-static int sm_wstream (char *, int);
-static int sm_werror (void);
-static int smhear (void);
-static int sm_rrecord (char *, int *);
-static int sm_rerror (void);
-static RETSIGTYPE alrmser (int);
-
-
-int
-sm_init (char *client, char *server, int watch, int verbose,
- int debug, int onex, int queued, int sasl, char *saslmech, char *user)
-{
- int i, result, vecp;
- int pdi[2], pdo[2];
- char *vec[15];
-
- if (watch)
- verbose = TRUE;
-
- sm_verbose = verbose;
- sm_debug = debug;
- if (sm_rfp != NULL && sm_wfp != NULL)
- return RP_OK;
-
- if (client == NULL || *client == '\0') {
- if (clientname)
- client = clientname;
- else
- client = LocalName(); /* no clientname -> LocalName */
- }
-
-#ifdef ZMAILER
- if (client == NULL || *client == '\0')
- client = "localhost";
-#endif
-
- if (pipe (pdi) == NOTOK)
- return sm_ierror ("no pipes");
- if (pipe (pdo) == NOTOK) {
- close (pdi[0]);
- close (pdi[1]);
- return sm_ierror ("no pipes");
- }
-
- for (i = 0; (sm_child = fork ()) == NOTOK && i < 5; i++)
- sleep (5);
-
- switch (sm_child) {
- case NOTOK:
- close (pdo[0]);
- close (pdo[1]);
- close (pdi[0]);
- close (pdi[1]);
- return sm_ierror ("unable to fork");
-
- case OK:
- if (pdo[0] != fileno (stdin))
- dup2 (pdo[0], fileno (stdin));
- if (pdi[1] != fileno (stdout))
- dup2 (pdi[1], fileno (stdout));
- if (pdi[1] != fileno (stderr))
- dup2 (pdi[1], fileno (stderr));
- for (i = fileno (stderr) + 1; i < NBITS; i++)
- close (i);
-
- vecp = 0;
- vec[vecp++] = r1bindex (sendmail, '/');
- vec[vecp++] = "-bs";
-#ifndef ZMAILER
- vec[vecp++] = watch ? "-odi" : queued ? "-odq" : "-odb";
- vec[vecp++] = "-oem";
- vec[vecp++] = "-om";
-# ifndef RAND
- if (verbose)
- vec[vecp++] = "-ov";
-# endif /* not RAND */
-#endif /* not ZMAILER */
- vec[vecp++] = NULL;
-
- setgid (getegid ());
- setuid (geteuid ());
- execvp (sendmail, vec);
- fprintf (stderr, "unable to exec ");
- perror (sendmail);
- _exit (-1); /* NOTREACHED */
-
- default:
- SIGNAL (SIGALRM, alrmser);
- SIGNAL (SIGPIPE, SIG_IGN);
-
- close (pdi[1]);
- close (pdo[0]);
- if ((sm_rfp = fdopen (pdi[0], "r")) == NULL
- || (sm_wfp = fdopen (pdo[1], "w")) == NULL) {
- close (pdi[0]);
- close (pdo[1]);
- sm_rfp = sm_wfp = NULL;
- return sm_ierror ("unable to fdopen");
- }
- sm_alarmed = 0;
- alarm (SM_OPEN);
- result = smhear ();
- alarm (0);
- switch (result) {
- case 220:
- break;
-
- default:
- sm_end (NOTOK);
- return RP_RPLY;
- }
-
- if (client && *client) {
- doingEHLO = 1;
- result = smtalk (SM_HELO, "EHLO %s", client);
- doingEHLO = 0;
-
- if (500 <= result && result <= 599)
- result = smtalk (SM_HELO, "HELO %s", client);
-
- switch (result) {
- case 250:
- break;
-
- default:
- sm_end (NOTOK);
- return RP_RPLY;
- }
- }
-
-#ifndef ZMAILER
- if (onex)
- smtalk (SM_HELO, "ONEX");
-#endif
- if (watch)
- smtalk (SM_HELO, "VERB on");
-
- return RP_OK;
- }
-}
-
-
-int
-sm_winit (int mode, char *from)
-{
-#ifdef MPOP
- if (sm_ispool && !sm_wfp) {
- strlen (strcpy (sm_reply.text, "unable to create new spool file"));
- sm_reply.code = NOTOK;
- return RP_BHST;
- }
-#endif /* MPOP */
-
- switch (smtalk (SM_MAIL, "%s FROM:<%s>",
- mode == S_SEND ? "SEND" : mode == S_SOML ? "SOML"
- : mode == S_SAML ? "SAML" : "MAIL", from)) {
- case 250:
- sm_addrs = 0;
- return RP_OK;
-
- case 500:
- case 501:
- case 552:
- return RP_PARM;
-
- default:
- return RP_RPLY;
- }
-}
-
-
-int
-sm_wadr (char *mbox, char *host, char *path)
-{
- switch (smtalk (SM_RCPT, host && *host ? "RCPT TO:<%s%s@%s>"
- : "RCPT TO:<%s%s>",
- path ? path : "", mbox, host)) {
- case 250:
- case 251:
- sm_addrs++;
- return RP_OK;
-
- case 451:
-#ifdef SENDMAILBUG
- sm_addrs++;
- return RP_OK;
-#endif /* SENDMAILBUG */
- case 421:
- case 450:
- case 452:
- return RP_NO;
-
- case 500:
- case 501:
- return RP_PARM;
-
- case 550:
- case 551:
- case 552:
- case 553:
- return RP_USER;
-
- default:
- return RP_RPLY;
- }
-}
-
-
-int
-sm_waend (void)
-{
- switch (smtalk (SM_DATA, "DATA")) {
- case 354:
- sm_nl = TRUE;
- return RP_OK;
-
- case 451:
-#ifdef SENDMAILBUG
- sm_nl = TRUE;
- return RP_OK;
-#endif /* SENDMAILBUG */
- case 421:
- return RP_NO;
-
- case 500:
- case 501:
- case 503:
- case 554:
- return RP_NDEL;
-
- default:
- return RP_RPLY;
- }
-}
-
-
-int
-sm_wtxt (char *buffer, int len)
-{
- int result;
-
- sm_alarmed = 0;
- alarm (SM_TEXT);
- result = sm_wstream (buffer, len);
- alarm (0);
-
- return (result == NOTOK ? RP_BHST : RP_OK);
-}
-
-
-int
-sm_wtend (void)
-{
- if (sm_wstream ((char *) NULL, 0) == NOTOK)
- return RP_BHST;
-
- switch (smtalk (SM_DOT + 3 * sm_addrs, ".")) {
- case 250:
- case 251:
- return RP_OK;
-
- case 451:
-#ifdef SENDMAILBUG
- return RP_OK;
-#endif /* SENDMAILBUG */
- case 452:
- default:
- return RP_NO;
-
- case 552:
- case 554:
- return RP_NDEL;
- }
-}
-
-
-int
-sm_end (int type)
-{
- int status;
- struct smtp sm_note;
-
- switch (sm_child) {
- case NOTOK:
- case OK:
- return RP_OK;
-
- default:
- break;
- }
-
- if (sm_rfp == NULL && sm_wfp == NULL)
- return RP_OK;
-
- switch (type) {
- case OK:
- smtalk (SM_QUIT, "QUIT");
- break;
-
- case NOTOK:
- sm_note.code = sm_reply.code;
- strncpy (sm_note.text, sm_reply.text, sm_note.length = sm_reply.length);/* fall */
- case DONE:
- if (smtalk (SM_RSET, "RSET") == 250 && type == DONE)
- return RP_OK;
- kill (sm_child, SIGKILL);
- discard (sm_rfp);
- discard (sm_wfp);
- if (type == NOTOK) {
- sm_reply.code = sm_note.code;
- strncpy (sm_reply.text, sm_note.text, sm_reply.length = sm_note.length);
- }
- break;
- }
- if (sm_rfp != NULL) {
- alarm (SM_CLOS);
- fclose (sm_rfp);
- alarm (0);
- }
- if (sm_wfp != NULL) {
- alarm (SM_CLOS);
- fclose (sm_wfp);
- alarm (0);
- }
-
- status = pidwait (sm_child, OK);
-
- sm_child = NOTOK;
- sm_rfp = sm_wfp = NULL;
-
- return (status ? RP_BHST : RP_OK);
-}
-
-
-static int
-sm_ierror (char *fmt, ...)
-{
- va_list ap;
-
- va_start(ap, fmt);
- vsnprintf (sm_reply.text, sizeof(sm_reply.text), fmt, ap);
- va_end(ap);
-
- sm_reply.length = strlen (sm_reply.text);
- sm_reply.code = NOTOK;
-
- return RP_BHST;
-}
-
-
-static int
-smtalk (int time, char *fmt, ...)
-{
- int result;
- char buffer[BUFSIZ];
- va_list ap;
-
- va_start(ap, fmt);
- vsnprintf (buffer, sizeof(buffer), fmt, ap);
- va_end(ap);
-
- if (sm_debug) {
- printf ("=> %s\n", buffer);
- fflush (stdout);
- }
-
-#ifdef MPOP
- if (sm_ispool) {
- char file[BUFSIZ];
-
- if (strcmp (buffer, ".") == 0)
- time = SM_DOT;
- fprintf (sm_wfp, "%s\r\n", buffer);
- switch (time) {
- case SM_DOT:
- fflush (sm_wfp);
- if (ferror (sm_wfp))
- return sm_werror ();
- snprintf (file, sizeof(file), "%s%c.bulk", sm_tmpfil,
- (char) (sm_ispool + 'a' - 1));
- if (rename (sm_tmpfil, file) == NOTOK) {
- int len;
- char *bp;
-
- snprintf (sm_reply.text, sizeof(sm_reply.text),
- "error renaming %s to %s: ", sm_tmpfil, file);
- bp = sm_reply.text;
- len = strlen (bp);
- bp += len;
- if ((s = strerror (errno)))
- strncpy (bp, s, sizeof(sm_reply.text) - len);
- else
- snprintf (bp, sizeof(sm_reply.text) - len,
- "unknown error %d", errno);
- sm_reply.length = strlen (sm_reply.text);
- sm_reply.code = NOTOK;
- return RP_BHST;
- }
- fclose (sm_wfp);
- if (sm_wfp = fopen (sm_tmpfil, "w"))
- chmod (sm_tmpfil, 0600);
- sm_ispool++;
- /* and fall... */
-
- case SM_MAIL:
- case SM_RCPT:
- result = 250;
- break;
-
- case SM_RSET:
- fflush (sm_wfp);
- ftruncate (fileno (sm_wfp), 0L);
- fseek (sm_wfp, 0L, SEEK_SET);
- result = 250;
- break;
-
- case SM_DATA:
- result = 354;
- break;
-
- case SM_QUIT:
- unlink (sm_tmpfil);
- sm_ispool = 0;
- result = 221;
- break;
-
- default:
- result = 500;
- break;
- }
- if (sm_debug) {
- printf ("<= %d\n", result);
- fflush (stdout);
- }
-
- sm_reply.text[sm_reply.length = 0] = NULL;
- return (sm_reply.code = result);
- }
-#endif /* MPOP */
-
- sm_alarmed = 0;
- alarm ((unsigned) time);
- if ((result = sm_wrecord (buffer, strlen (buffer))) != NOTOK)
- result = smhear ();
- alarm (0);
-
- return result;
-}
-
-
-static int
-sm_wrecord (char *buffer, int len)
-{
- if (sm_wfp == NULL)
- return sm_werror ();
-
- fwrite (buffer, sizeof *buffer, len, sm_wfp);
- fputs ("\r\n", sm_wfp);
- fflush (sm_wfp);
-
- return (ferror (sm_wfp) ? sm_werror () : OK);
-}
-
-
-static int
-sm_wstream (char *buffer, int len)
-{
- char *bp;
- static char lc = 0;
-
- if (sm_wfp == NULL)
- return sm_werror ();
-
- if (buffer == NULL && len == 0) {
- if (lc != '\n')
- fputs ("\r\n", sm_wfp);
- lc = 0;
- return (ferror (sm_wfp) ? sm_werror () : OK);
- }
-
- for (bp = buffer; len > 0; bp++, len--) {
- switch (*bp) {
- case '\n':
- sm_nl = TRUE;
- fputc ('\r', sm_wfp);
- break;
-
- case '.':
- if (sm_nl)
- fputc ('.', sm_wfp);/* FALL THROUGH */
- default:
- sm_nl = FALSE;
- }
- fputc (*bp, sm_wfp);
- if (ferror (sm_wfp))
- return sm_werror ();
- }
-
- if (bp > buffer)
- lc = *--bp;
- return (ferror (sm_wfp) ? sm_werror () : OK);
-}
-
-
-#ifdef _AIX
-/*
- * AIX by default will inline the strlen and strcpy commands by redefining
- * them as __strlen and __strcpy respectively. This causes compile problems
- * with the #ifdef MPOP in the middle. Should the #ifdef MPOP be removed,
- * remove these #undefs.
- */
-# undef strlen
-# undef strcpy
-#endif /* _AIX */
-
-static int
-sm_werror (void)
-{
- sm_reply.length =
- strlen (strcpy (sm_reply.text, sm_wfp == NULL ? "no pipe opened"
- : sm_alarmed ? "write to pipe timed out"
- : "error writing to pipe"));
-
- return (sm_reply.code = NOTOK);
-}
-
-
-static int
-smhear (void)
-{
- int i, code, cont, bc, rc, more;
- char *bp, *rp;
- char **ehlo, buffer[BUFSIZ];
-
- if (doingEHLO) {
- static int at_least_once = 0;
-
- if (at_least_once) {
- for (ehlo = EHLOkeys; *ehlo; ehlo++)
- free (*ehlo);
- } else {
- at_least_once = 1;
- }
-
- *(ehlo = EHLOkeys) = NULL;
- }
-
-again:
-
- sm_reply.text[sm_reply.length = 0] = 0;
-
- rp = sm_reply.text;
- rc = sizeof(sm_reply.text) - 1;
-
- for (more = FALSE; sm_rrecord (bp = buffer, &bc) != NOTOK;) {
- if (sm_debug) {
- printf ("<= %s\n", buffer);
- fflush (stdout);
- }
-
- if (doingEHLO
- && strncmp (buffer, "250", sizeof("250") - 1) == 0
- && (buffer[3] == '-' || doingEHLO == 2)
- && buffer[4]) {
- if (doingEHLO == 2) {
- if ((*ehlo = malloc ((size_t) (strlen (buffer + 4) + 1)))) {
- strcpy (*ehlo++, buffer + 4);
- *ehlo = NULL;
- if (ehlo >= EHLOkeys + MAXEHLO)
- doingEHLO = 0;
- }
- else
- doingEHLO = 0;
- }
- else
- doingEHLO = 2;
- }
-
- for (; bc > 0 && (!isascii (*bp) || !isdigit (*bp)); bp++, bc--)
- continue;
-
- cont = FALSE;
- code = atoi (bp);
- bp += 3, bc -= 3;
- for (; bc > 0 && isspace (*bp); bp++, bc--)
- continue;
- if (bc > 0 && *bp == '-') {
- cont = TRUE;
- bp++, bc--;
- for (; bc > 0 && isspace (*bp); bp++, bc--)
- continue;
- }
-
- if (more) {
- if (code != sm_reply.code || cont)
- continue;
- more = FALSE;
- } else {
- sm_reply.code = code;
- more = cont;
- if (bc <= 0) {
- strncpy (buffer, sm_noreply, sizeof(buffer));
- bp = buffer;
- bc = strlen (sm_noreply);
- }
- }
- if ((i = min (bc, rc)) > 0) {
- strncpy (rp, bp, i);
- rp += i;
- rc -= i;
- if (more && rc > strlen (sm_moreply) + 1) {
- strncpy (sm_reply.text + rc, sm_moreply, sizeof(sm_reply.text) - rc);
- rc += strlen (sm_moreply);
- }
- }
- if (more)
- continue;
- if (sm_reply.code < 100) {
- if (sm_verbose) {
- printf ("%s\n", sm_reply.text);
- fflush (stdout);
- }
- goto again;
- }
-
- sm_reply.length = rp - sm_reply.text;
-
- return sm_reply.code;
- }
-
- return NOTOK;
-}
-
-
-static int
-sm_rrecord (char *buffer, int *len)
-{
- if (sm_rfp == NULL)
- return sm_rerror ();
-
- buffer[*len = 0] = 0;
-
- fgets (buffer, BUFSIZ, sm_rfp);
- *len = strlen (buffer);
- if (ferror (sm_rfp) || feof (sm_rfp))
- return sm_rerror ();
- if (buffer[*len - 1] != '\n')
- while (getc (sm_rfp) != '\n' && !ferror (sm_rfp) && !feof (sm_rfp))
- continue;
- else
- if (buffer[*len - 2] == '\r')
- *len -= 1;
- buffer[*len - 1] = 0;
-
- return OK;
-}
-
-
-static int
-sm_rerror (void)
-{
- sm_reply.length =
- strlen (strcpy (sm_reply.text, sm_rfp == NULL ? "no pipe opened"
- : sm_alarmed ? "read from pipe timed out"
- : feof (sm_rfp) ? "premature end-of-file on pipe"
- : "error reading from pipe"));
-
- return (sm_reply.code = NOTOK);
-}
-
-
-static RETSIGTYPE
-alrmser (int i)
-{
-#ifndef RELIABLE_SIGNALS
- SIGNAL (SIGALRM, alrmser);
-#endif
-
- sm_alarmed++;
- if (sm_debug) {
- printf ("timed out...\n");
- fflush (stdout);
- }
-}
-
-
-char *
-rp_string (int code)
-{
- char *text;
- static char buffer[BUFSIZ];
-
- switch (sm_reply.code != NOTOK ? code : NOTOK) {
- case RP_AOK:
- text = "AOK";
- break;
-
- case RP_MOK:
- text = "MOK";
- break;
-
- case RP_OK:
- text = "OK";
- break;
-
- case RP_RPLY:
- text = "RPLY";
- break;
-
- case RP_BHST:
- default:
- text = "BHST";
- snprintf (buffer, sizeof(buffer), "[%s] %s", text, sm_reply.text);
- return buffer;
-
- case RP_PARM:
- text = "PARM";
- break;
-
- case RP_NO:
- text = "NO";
- break;
-
- case RP_USER:
- text = "USER";
- break;
-
- case RP_NDEL:
- text = "NDEL";
- break;
- }
-
- snprintf (buffer, sizeof(buffer), "[%s] %3d %s",
- text, sm_reply.code, sm_reply.text);
- return buffer;
-}
-
projects / mmh / blobdiff