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vdelivermail.c
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vdelivermail.c
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/*
* Copyright (C) 1999-2009 Inter7 Internet Technologies, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
/* code review/cleanup/rewrite October 2004 through March, 2005
* by Tom Collins <[email protected]>
*
*/
/* include files */
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>
#include "config.h"
#include "maildirquota.h"
#include "vauth.h"
#include "vpopmail.h"
#ifdef MAKE_SEEKABLE
#include "seek.h"
#endif
#include "vlimits.h"
/* Globals */
#define AUTH_SIZE 300
char TheUser[AUTH_SIZE];
char TheUserFull[AUTH_SIZE];
char TheDomain[AUTH_SIZE];
char TheDomainDir[AUTH_SIZE];
uid_t TheDomainUid;
gid_t TheDomainGid;
char TheDir[AUTH_SIZE];
char CurrentDir[AUTH_SIZE];
char DeliveredTo[AUTH_SIZE];
struct vqpasswd *vpw;
ssize_t message_size = 0;
char bounce[AUTH_SIZE];
int CurrentQuotaSizeFd;
#ifdef QMAIL_EXT
/* the User with '-' and following chars out if any */
char TheUserExt[AUTH_SIZE];
char TheExt[AUTH_SIZE];
#endif
#define FILE_SIZE 156
char loop_buf[FILE_SIZE];
#ifdef SPAMASSASSIN
int InHeaders = 1;
int is_spam();
#endif
int DeleteMail = 0;
int MoveMail = 0;
int local = 1;
#define MSG_BUF_SIZE 5000
char msgbuf[MSG_BUF_SIZE];
#define BUFF_SIZE 300
int fdm;
#define EXIT_BOUNCE 100
#define EXIT_DEFER 111
#define EXIT_OK 0
#define EXIT_OVERQUOTA EXIT_BOUNCE
/* Forward declarations */
int process_valias(void);
void get_arguments(int argc, char **argv);
ssize_t get_message_size();
void deliver_mail(char *address, char *quota);
int check_forward_deliver(char *dir);
int is_looping(char *address);
static void run_command(char *prog);
void checkuser(void);
void usernotfound(void);
int is_loop_match(const char *dt, const char *address);
int deliver_quota_warning(const char *dir, const char *q);
/* print an error string and then exit
* vexit() never returns, so vexiterr() and vexit() should actually return void
*/
int vexiterr(int err, char *errstr) {
if (errstr) printf("%s\n", errstr);
return vexit(err);
}
/*
* The email message comes in on file descriptor 0 - stdin
* The user to deliver the email to is in the EXT environment variable
* The domain to deliver the email to is in the HOST environment variable
*/
int main(int argc, char **argv) {
char loopcheck[255];
int r;
/* get the arguments to the program and setup things */
get_arguments(argc, argv);
r = snprintf(loopcheck, sizeof(loopcheck), "%s@%s", TheUser, TheDomain);
if (r == -1) {
vexiterr(EXIT_DEFER, "vdelivermail: email too long");
}
if (is_looping(loopcheck) == 1) {
vexiterr(EXIT_BOUNCE, "mail is looping");
}
#ifdef VALIAS
/* process valiases if configured */
if (process_valias() == 1)
vexiterr(EXIT_OK, "vdelivermail: valiases processed");
/* if the database is down, deferr */
if (verrori == VA_NO_AUTH_CONNECTION)
vexiterr(EXIT_DEFER, "vdelivermail: deferred, database down");
#endif
/* get the user from vpopmail database */
if ((vpw = vauth_getpw(TheUser, TheDomain)) != NULL) {
checkuser();
}
#ifdef QMAIL_EXT
/* try and find user that matches the QmailEXT address if: no user found,
* and the QmailEXT address is different, meaning there was an extension
*/
else if (strcmp(TheUser, TheUserExt) != 0) {
/* get the user from vpopmail database */
if ((vpw = vauth_getpw(TheUserExt, TheDomain)) != NULL) {
checkuser();
} else {
usernotfound();
}
}
#endif
/* Additions by Steve Fulton - [email protected]
* - added error code handling for error codes generated by Autoresponder
* 99 = deliver mail
* 100 = bounce mail
*/
else if (verrori == 100)
vexit(EXIT_BOUNCE);
else if (verrori == 99)
vexit(EXIT_OK);
/* End of additions by Steve Fulton */
else if (verrori != 0)
vexit(EXIT_DEFER);
else
usernotfound();
/* exit successfully and have qmail delete the email */
return (vexit(EXIT_OK));
}
/*
* Get the command line arguments and the environment variables.
* Force addresses to be lower case and set the default domain
*/
void get_arguments(int argc, char **argv) {
#ifdef QMAIL_EXT
int i;
#endif
char *tmpstr;
if (argc != 3) {
/* exit with temporary error */
vexiterr(EXIT_DEFER, "vdelivermail: invalid syntax in .qmail-default file");
}
/* get the last parameter in the .qmail-default file */
strncpy(bounce, argv[2], sizeof(bounce));
if ((tmpstr = getenv("EXT")) == NULL) {
vexiterr(EXIT_BOUNCE, "vdelivermail: no EXT environment varilable");
}
snprintf(TheUser, sizeof(TheUser), "%s", tmpstr);
if ((tmpstr = getenv("HOST")) == NULL) {
vexiterr(EXIT_BOUNCE, "vdelivermail: no HOST environment varilable");
}
snprintf(TheDomain, sizeof(TheDomain), "%s", tmpstr);
lowerit(TheUser);
lowerit(TheDomain);
if (is_username_valid(TheUser) != 0)
vexiterr(EXIT_BOUNCE, "invalid username");
if (is_domain_valid(TheDomain) != 0)
vexiterr(EXIT_BOUNCE, "invalid domain name");
snprintf(TheUserFull, sizeof(TheUserFull), "%s", TheUser);
#ifdef QMAIL_EXT
/* !! Shouldn't this work its way backwards, and try all possibilities?
* e.g., a-b-c-d should try a-b-c then a-b then a, instead of just a?
*/
/* delete the '-' and following chars if any and store in TheUserExt */
for (i = 0; (TheUser[i] != 0) && (TheUser[i] != '-'); i++) {
TheUserExt[i] = TheUser[i];
}
TheUserExt[i] = 0;
if (is_username_valid(TheUserExt) != 0) {
vexit(EXIT_BOUNCE);
}
strncpy(TheExt, &TheUser[i + 1], AUTH_SIZE);
for (i = 0; (TheExt[i] != 0); i++) {
if (TheExt[i] == '.') TheExt[i] = ':';
}
#endif
vget_assign(TheDomain, TheDomainDir, sizeof(TheDomainDir), &TheDomainUid,
&TheDomainGid);
}
#ifdef VALIAS
/*
* Process any valiases for this user@domain
*
* This will look up any valiases in vpopmail and
* deliver the email to the entries
*
* Return 1 if aliases found
* Return 0 if no aliases found
*/
int process_valias(void) {
int found = 0;
char *tmpstr;
char tmpuser[350];
char def[350];
int i;
int j = 0;
/* Get the first alias for this user@domain */
tmpstr = valias_select(TheUser, TheDomain);
/* check for wildcard if there's no match */
if (tmpstr == NULL) {
for (i = strlen(TheUser); i > 0 && j != 1; --i) {
if (TheUser[i - 1] == '-') {
tmpuser[0] = '\0';
strncat(tmpuser, TheUser, i);
strcat(tmpuser, "default");
tmpstr = valias_select(tmpuser, TheDomain);
if (tmpstr != NULL) {
sprintf(def, "DEFAULT=%s", &TheUser[i]);
putenv(def);
j = 1;
}
}
}
}
/* tmpstr will be NULL if there are no more aliases */
while (tmpstr != NULL) {
/* We found one */
found = 1;
/* deliver the mail */
deliver_mail(tmpstr, "");
/* Get the next alias for this user@domain */
tmpstr = valias_select_next();
}
#ifdef QMAIL_EXT
/* try and find alias that matches the QmailEXT address
* if: no alias found,
* and the QmailEXT address is different, meaning there was an extension
*/
if ((!found) && (strcmp(TheUser, TheUserExt) != 0)) {
/* Get the first alias for this user@domain */
tmpstr = valias_select(TheUserExt, TheDomain);
/* tmpstr will be NULL if there are no more aliases */
while (tmpstr != NULL) {
/* We found one */
found = 1;
/* deliver the mail */
deliver_mail(tmpstr, "");
/* Get the next alias for this user@domain */
tmpstr = valias_select_next();
}
}
#endif
/* Return whether we found an alias or not */
return (found);
}
#endif
/* Forks off qmail-inject. Returns PID of child, or 0 for failure. */
static pid_t qmail_inject_open(char *address) {
int pim[2];
pid_t pid;
static char *binqqargs[4];
if (pipe(pim) == -1) return 0;
switch (pid = fork()) {
case -1:
close(pim[0]);
close(pim[1]);
printf("Unable to fork: %d.", errno);
return 0;
case 0:
close(pim[1]);
if (vfd_move(0, pim[0]) == -1) _exit(-1);
binqqargs[0] = QMAILINJECT;
binqqargs[1] = "--";
binqqargs[2] = (*address == '&' ? &address[1] : &address[0]);
execv(*binqqargs, binqqargs);
printf("Unable to launch qmail-inject.");
exit(EXIT_DEFER); /* child's exit caught later */
}
fdm = pim[1];
close(pim[0]);
return (pid);
}
/**
* @returns if delivery worked
* @retval 0 message was delivered as is
* @retval 1 the file has changed the size during delivery
* @retval -1 error
*/
static int fdcopy(int write_fd, int read_fd, const char *extra_headers,
size_t headerlen, char *address) {
ssize_t file_count;
struct vlimits limits;
#ifdef SPAMASSASSIN
long unsigned pid;
int pim[2];
#endif
int has_changed_size = 0;
/* write the Return-Path: and Delivered-To: headers */
if (headerlen > 0) {
if (write(write_fd, extra_headers, headerlen) != headerlen) return -1;
}
/* fork the SpamAssassin client - based on work by Alex Dupre */
if (local == 1) {
vget_limits(TheDomain, &limits);
if (vpw == NULL) {
parse_email(address, TheUser, TheDomain, AUTH_SIZE);
vpw = vauth_getpw(TheUser, TheDomain);
}
#ifdef SPAMASSASSIN
if (limits.disable_spamassassin == 0 && vpw != NULL &&
!(vpw->pw_gid & NO_SPAMASSASSIN)) {
if (!pipe(pim)) {
pid = fork();
switch (pid) {
case -1:
close(pim[0]);
close(pim[1]);
break;
case 0:
close(pim[0]);
dup2(pim[1], 1);
close(pim[1]);
if (execl(SPAMC_PROG, SPAMC_PROG, "-f", "-u", address, 0) == -1) {
while ((file_count = read(0, msgbuf, sizeof(msgbuf))) > 0) {
write(1, msgbuf, file_count);
}
_exit(0);
}
}
close(pim[1]);
dup2(pim[0], 0);
close(pim[0]);
has_changed_size = 1;
}
}
#endif
#ifdef MAILDROP
if (limits.disable_maildrop == 0 && vpw != NULL &&
!(vpw->pw_gid & NO_MAILDROP)) {
char maildrop_command[256];
sprintf(maildrop_command, "preline %s", MAILDROP_PROG);
run_command(maildrop_command);
DeleteMail = 1;
return (0);
}
#endif
}
/* read it in chunks and write it to the new file */
while ((file_count = read(read_fd, msgbuf, sizeof(msgbuf))) > 0) {
#ifdef SPAMASSASSIN
if (local == 1 && InHeaders == 1
#if defined(SPAM_THRESHOLD) || defined(SPAM_JUNKFOLDER)
) {
#else
&& (limits.delete_spam == 1 || vpw->pw_gid & DELETE_SPAM)) {
#endif
switch (is_spam(msgbuf, file_count)) {
case 2:
#ifdef SPAM_THRESHOLD
DeleteMail = 1;
return (0);
#endif
case 1:
if (limits.delete_spam == 1 || vpw->pw_gid & DELETE_SPAM) {
DeleteMail = 1;
return (0);
}
#ifdef SPAM_JUNKFOLDER
MoveMail = 1;
#endif
}
}
#endif
if (write(write_fd, msgbuf, file_count) == -1) return -1;
}
#ifdef SPAMASSASSIN
/* No body */
if (InHeaders == 1) DeleteMail = 1;
#endif
return has_changed_size;
}
void read_quota_from_maildir(const char *maildir, char *qbuf, size_t qlen) {
FILE *quota_file;
char quotafn[FILE_SIZE];
char *newline;
if (qlen == 0) return;
*qbuf = '\0';
snprintf(quotafn, sizeof(quotafn), "%s/maildirsize", maildir);
quota_file = fopen(quotafn, "r");
if (quota_file == NULL) {
/* add code here to use current user's quota if maildir matches */
if (vpw == NULL) {
// fprintf (stderr, "Don't know quota for %s\n", maildir);
} else {
char *usermaildir;
usermaildir = malloc(strlen(vpw->pw_dir) + sizeof("/Maildir") + 1);
if (usermaildir) {
sprintf(usermaildir, "%s/Maildir", vpw->pw_dir);
if (strcmp(usermaildir, maildir) == 0)
snprintf(qbuf, qlen, "%s", vpw->pw_shell);
// fprintf (stderr, "Quota for %s (from user entry) is %s\n", maildir,
// quota);
free(usermaildir);
}
}
} else {
fgets(qbuf, qlen, quota_file);
fclose(quota_file);
newline = strchr(qbuf, '\n');
if (newline != NULL) *newline = '\0';
// fprintf (stderr, "Quota for %s (from maildirsize) is %s\n", maildir,
// quota);
}
}
/* save email in maildir, starting with extra_headers and then msgsize bytes
* read from read_fd
*
* Return: 0 = success, -1 = over quota, -2 = system failure, -3 = looping
*/
int deliver_to_maildir(const char *maildir, const char *extra_headers,
int read_fd) {
#ifdef HOST_NAME_MAX
char hostname[HOST_NAME_MAX];
#else
char hostname[256];
#endif
long unsigned pid, tm;
char local_file_tmp[FILE_SIZE];
char local_file_new[FILE_SIZE];
size_t headerlen;
struct stat sb;
size_t msgsize;
int write_fd;
char quota[80];
int fdr;
#ifdef SPAM_JUNKFOLDER
struct stat mystatbuf;
char dir[MAX_BUFF];
char calling_dir[MAX_BUFF];
#endif
headerlen = strlen(extra_headers);
if ((getenv("DELIVER_TO_STDOUT")) != NULL) {
if (fdcopy(1, read_fd, extra_headers, headerlen,
maildir_to_email(maildir)) < 0) {
printf("echo to stdout failed\n");
return -2;
} else {
/* Email sent to STDOUT */
return 0;
}
}
/* Format the email file name */
/* we get the whole hostname, even though we only use 32 chars of it */
gethostname(hostname, sizeof(hostname));
pid = (long unsigned)getpid();
tm = (long unsigned)time((time_t *)NULL);
snprintf(local_file_tmp, sizeof(local_file_tmp), "%stmp/%lu.%lu.%.32s",
maildir, tm, pid, hostname);
read_quota_from_maildir(maildir, quota, sizeof(quota));
/* open the new email file */
if ((write_fd = open(local_file_tmp, O_CREAT | O_RDWR, S_IRUSR | S_IWUSR)) ==
-1) {
if (errno == EDQUOT) return -1;
printf("can not open new email file errno=%d file=%s\n", errno,
local_file_tmp);
return (-2);
}
local = 1;
fdr = fdcopy(write_fd, read_fd, extra_headers, headerlen,
maildir_to_email(maildir));
if (fdr < 0) {
/* Did the write fail because we were over quota? */
if (errno == EDQUOT) {
close(write_fd);
unlink(local_file_tmp);
return -1;
} else {
printf("write failed errno = %d\n", errno);
close(write_fd);
unlink(local_file_tmp);
return -2;
}
} else if (fdr == 1) {
/* the file has changed it's size during delivery, e.g. because
* SpamAssassin has written it's report to it. */
struct stat st;
if (fstat(write_fd, &st) == 0 && st.st_size != msgsize)
snprintf(local_file_new, sizeof(local_file_new),
"%snew/%lu.%lu.%.32s,S=%lu", maildir, tm, pid, hostname,
(long unsigned)st.st_size);
}
/* completed write to tmp directory, now move it into the new directory */
/* sync the data to disk and close the file */
errno = 0;
if (
#ifdef FILE_SYNC
#ifdef HAVE_FDATASYNC
fdatasync(write_fd) == 0 &&
#else
fsync(write_fd) == 0 &&
#endif
#endif
close(write_fd) == 0) {
if (stat(local_file_tmp, &sb) == -1) DeleteMail = 1;
if (DeleteMail == 1) {
if (unlink(local_file_tmp) != 0) {
printf("unlink failed %s errno = %d\n", local_file_tmp, errno);
return (errno);
}
return (0);
}
msgsize = sb.st_size;
snprintf(local_file_new, sizeof(local_file_new),
"%snew/%lu.%lu.%.32s,S=%lu", maildir, tm, pid, hostname,
(long unsigned)msgsize);
/* if this succeeds link the file to the new directory */
#ifdef SPAM_JUNKFOLDER
if (MoveMail == 1) {
snprintf(dir, sizeof(local_file_new), "%s/.Junk", maildir);
if (stat(dir, &mystatbuf) == -1) {
/* record the dir where the vdelivermail command was run from */
getcwd(calling_dir, sizeof(calling_dir));
if (mkdir(dir, VPOPMAIL_DIR_MODE) == -1) {
chdir(calling_dir);
unlink(local_file_tmp);
return (-2);
}
if (chdir(dir) == -1) {
chdir(calling_dir);
unlink(local_file_tmp);
return (-2);
}
if (mkdir("cur", VPOPMAIL_DIR_MODE) == -1) {
chdir(calling_dir);
unlink(local_file_tmp);
return (-2);
}
if (mkdir("new", VPOPMAIL_DIR_MODE) == -1) {
chdir(calling_dir);
unlink(local_file_tmp);
return (-2);
}
if (mkdir("tmp", VPOPMAIL_DIR_MODE) == -1) {
chdir(calling_dir);
unlink(local_file_tmp);
return (-2);
}
/* change back to the original dir */
chdir(calling_dir);
}
snprintf(local_file_new, sizeof(local_file_new),
"%s/.Junk/new/%lu.%lu.%.32s,S=%lu", maildir, tm, pid, hostname,
(long unsigned)msgsize);
}
#endif
if (link(local_file_tmp, local_file_new) == 0) {
/* file was successfully delivered, remove temp file */
if (unlink(local_file_tmp) != 0) {
/* not a critical error */
printf("unlink failed %s errno = %d\n", local_file_tmp, errno);
}
if (*quota) maildir_addquota(maildir, -1, quota, msgsize, 1);
return 0;
} else if (rename(local_file_tmp, local_file_new) == 0) {
/* file was successfully delivered */
if (*quota) maildir_addquota(maildir, -1, quota, msgsize, 1);
return 0;
} else {
/* even rename failed, time to give up */
printf("rename failed %s %s errno = %d\n", local_file_tmp, local_file_new,
errno);
unlink(local_file_tmp); /* remove temp file */
return -2;
}
}
/* return failure (sync/close failed, message NOT delivered) */
return -2;
}
/*
* Deliver an email to an address
* calls vexit on failure
*/
void deliver_mail(char *address, char *quota) {
pid_t inject_pid = 0;
int child;
unsigned int xcode;
FILE *fs;
int r;
char tmp_file[256];
char maildirquota[80];
char *email;
#ifdef MAILDROP
struct vlimits limits;
#endif
/* This is a comment, ignore it */
if (*address == '#') return;
/* check if the email is looping to this user */
if (is_looping(address) == 1) {
vexiterr(EXIT_BOUNCE, "mail is looping");
}
#ifdef MAKE_SEEKABLE
/* at this point we know the message size - if its 0 drop out silently */
if (message_size == 0) return;
#endif
/* rewind the message */
lseek(0, 0L, SEEK_SET);
/* reinitialize for each dot-qmail line */
DeleteMail = 0;
/* This is an command */
if (*address == '|') {
/* run the command */
run_command(address);
return;
}
/* Starts with '.' or '/', then it's an mbox or maildir delivery */
else if ((*address == '.') || (*address == '/')) {
/* check for mbox delivery and exit accordingly */
if (address[strlen(address) - 1] != '/') {
printf("can't handle mbox delivery for %s", address);
vexit(EXIT_DEFER);
}
if ((quota == NULL) || (*quota == '\0')) {
read_quota_from_maildir(address, maildirquota, sizeof(maildirquota));
quota = maildirquota;
}
/* if the user has a quota set */
#ifdef MAILDROP
vget_limits(TheDomain, &limits);
if (vpw == NULL) {
parse_email(maildir_to_email(address), TheUser, TheDomain, AUTH_SIZE);
vpw = vauth_getpw(TheUser, TheDomain);
}
if ( vpw!=NULL && (limits.disable_maildrop==1 || (vpw->pw_gid & NO_MAILDROP))) {
#endif
if (strncmp(quota, "NOQUOTA", 2) != 0) {
/* If the user is over their quota, return it back
* to the sender.
*/
if (user_over_maildirquota(address, format_maildirquota(quota)) == 1) {
/* check for over quota message in domain */
r = snprintf(tmp_file, sizeof(tmp_file), "%s/.over-quota.msg",
TheDomainDir);
if (r == -1) {
printf("temporary string buffer too short\n");
vexit(EXIT_DEFER);
}
if ((fs = fopen(tmp_file, "r")) == NULL) {
/* if no domain over quota then check in vpopmail dir */
snprintf(tmp_file, sizeof(tmp_file), "%s/%s/.over-quota.msg",
VPOPMAILDIR, DOMAINS_DIR);
fs = fopen(tmp_file, "r");
}
if (fs == NULL) {
printf("user is over quota\n");
} else {
while (fgets(tmp_file, sizeof(tmp_file), fs) != NULL) {
fputs(tmp_file, stdout);
}
fclose(fs);
}
deliver_quota_warning(address, format_maildirquota(quota));
vexiterr(EXIT_OVERQUOTA, "");
}
if (QUOTA_WARN_PERCENT >= 0 &&
vmaildir_readquota(address, format_maildirquota(quota)) >=
QUOTA_WARN_PERCENT) {
deliver_quota_warning(address, format_maildirquota(quota));
}
}
#ifdef MAILDROP
}
#endif
#ifdef DOMAIN_QUOTAS
/* bk: check domain quota */
if (domain_over_maildirquota(address) == 1) {
/* check for over quota message in domain */
r = snprintf(tmp_file, sizeof(tmp_file), "%s/.over-quota.msg", TheDomainDir);
if (r == -1) {
printf("temporary string buffer too short\n");
vexit(EXIT_DEFER);
}
if ((fs = fopen(tmp_file, "r")) == NULL) {
/* if no domain over quota then check in vpopmail dir */
snprintf(tmp_file, sizeof(tmp_file), "%s/%s/.over-quota.msg",
VPOPMAILDIR, DOMAINS_DIR);
fs = fopen(tmp_file, "r");
}
if (fs == NULL) {
printf("domain is over quota\n");
} else {
while (fgets(tmp_file, sizeof(tmp_file), fs) != NULL) {
fputs(tmp_file, stdout);
}
fclose(fs);
}
deliver_quota_warning(address, format_maildirquota(quota));
vexiterr(EXIT_OVERQUOTA, "");
}
#endif
/* Get the email address from the maildir */
email = maildir_to_email(address);
/* Set the Delivered-To: header */
if (strcmp(address, bounce) == 0 || strcmp(email, "") == 0) {
r = snprintf(DeliveredTo, sizeof(DeliveredTo), "%sDelivered-To: %s@%s\n",
getenv("RPLINE"), TheUser, TheDomain);
if (r == -1) {
printf("temporary string buffer too short\n");
vexit(EXIT_DEFER);
}
} else {
snprintf(DeliveredTo, sizeof(DeliveredTo), "%sDelivered-To: %s\n",
getenv("RPLINE"), email);
}
switch (deliver_to_maildir(address, DeliveredTo, 0)) {
case -1:
vexiterr(EXIT_OVERQUOTA, "user is over quota");
break;
case -2:
vexiterr(EXIT_DEFER, "system error");
break;
case -3:
vexiterr(EXIT_BOUNCE, "mail is looping");
break;
default:
return;
}
/* must be an email address */
} else {
char *dtline;
char *atpos;
int dtlen;
if (*address == '&') ++address; /* will this case ever happen? */
inject_pid = qmail_inject_open(address);
if (inject_pid == 0)
vexiterr(EXIT_DEFER, "system error, can't open qmail-inject");
/* use the DTLINE variable, but skip past the dash in
* domain-user@domain
*/
if ((dtline = getenv("DTLINE")) != NULL) {
dtlen = strlen(dtline);
/* make sure dtline is at least as long as "Delivered-To: " */
if (dtlen < 15) {
dtline = NULL;
} else {
dtline += 14; /* skip "Delivered-To: " */
dtlen -= 14;
atpos = strchr(dtline, '@');
/* ex: dtline = "[email protected]\n"
* dtlen = 25, atpos = dtline+14
* add 25 - 14 - 1 = 10 bytes to dtline,
* now points to "[email protected]\n".
*/
if (atpos != NULL) {
dtline += (dtlen - (atpos - dtline) - 1);
}
}
}
if (dtline == NULL) {
snprintf(DeliveredTo, sizeof(DeliveredTo), "%sDelivered-To: %s\n",
getenv("RPLINE"), address);
} else {
snprintf(DeliveredTo, sizeof(DeliveredTo), "%sDelivered-To: %s",
getenv("RPLINE"), dtline);
}
local = 0;
if (fdcopy(fdm, 0, DeliveredTo, strlen(DeliveredTo), address) < 0) {
printf("write to qmail-inject failed: %d\n", errno);
close(fdm);
waitpid(inject_pid, &child, 0);
vexiterr(EXIT_DEFER, "system error calling qmail-inject");
}
close(fdm);
if (waitpid(inject_pid, &child, 0) <= 0 || !WIFEXITED(child)) {
xcode = EXIT_DEFER;
} else {
xcode = WEXITSTATUS(child);
if (xcode == 0) return;
}
vexiterr(xcode, "system error calling qmail-inject");
}
}
/* Check if the vpopmail user has a .qmail file in their directory
* and foward to each email address, Maildir or program
* that is found there in that file
*
* Return: 1 if we found and delivered email
* : 0 if not found
* : -1 if no user .qmail file
*
*/
int check_forward_deliver(char *dir) {
static char qmail_line[500];
FILE *fs;
int i;
int return_value = 0;
#ifdef QMAIL_EXT
char tmpbuf[500];
#endif
chdir(dir);
#ifdef QMAIL_EXT
fs = NULL;
/* format the file name */
if (strlen(TheExt)) {
strcpy(tmpbuf, ".qmail-");
strcat(tmpbuf, TheExt);
if ((fs = fopen(tmpbuf, "r")) == NULL) {
for (i = strlen(TheExt); i >= 0; --i) {
if (!i || TheExt[i - 1] == '-') {
strcpy(tmpbuf, ".qmail-");
strncat(tmpbuf, TheExt, i);
strcat(tmpbuf, "default");
if ((fs = fopen(tmpbuf, "r")) != NULL) {
break;
}
}
}
}
}
if (fs == NULL) fs = fopen(".qmail", "r");
#else
fs = fopen(".qmail", "r");
#endif
/* no .qmail file at all */
if (fs == NULL) {
/* no file, so just return */
return (-1);
}
/* read the file, line by line */
while (fgets(qmail_line, sizeof(qmail_line), fs) != NULL) {
if (*qmail_line == '#') {
return_value = 1;
continue;
}
/* remove the trailing new line */
for (i = 0; qmail_line[i] != 0; ++i) {
if (qmail_line[i] == '\n') qmail_line[i] = 0;
}
deliver_mail(qmail_line, "");
return_value = 1;
}
/* close the file */
fclose(fs);
/* return if we found one or not */
return (return_value);
}
void sig_catch(sig, f) int sig;
void (*f)();
{
#ifdef HAVE_SIGACTION
struct sigaction sa;
sa.sa_handler = f;
sa.sa_flags = 0;
sigemptyset(&sa.sa_mask);
sigaction(sig, &sa, (struct sigaction *)0);
#else
signal(sig, f); /* won't work under System V, even nowadays---dorks */
#endif
}
/* open a pipe to a command
* return the pid or -1 if error
*/
void run_command(char *prog) {
int child;
int wstat;
char *(args[4]);
while ((*prog == ' ') || (*prog == '|')) ++prog;