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/* qmailn.c - qmail initialization routines
* Copyright (C)2006 Bruce Guenter <bruce@untroubled.org>
*
* 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
*/
#include <errno.h>
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "qmail.h"
const char* qmail_root = "/var/qmail";
const char* qmail_me = 0;
const char* qmail_envnoathost = 0;
static int read_control(const char* control,
const char** s,
str* path)
{
/* Hostnames are realistically limited to 256 bytes. This is overkill. */
char buf[4096];
int fd;
long rd;
char* nl;
char* news;
long len;
if (!str_copy3s(path, qmail_root, "/control/", control))
return -1;
if ((fd = open(path->s, O_RDONLY)) == -1)
return (errno == ENOENT) ? 0 : -1;
rd = read(fd, buf, sizeof buf);
close(fd);
if (rd <= 0)
return rd;
if ((nl = memchr(buf, '\n', rd)) == 0)
nl = buf + rd;
len = nl - buf;
if ((news = malloc(len + 1)) == 0)
return -1;
memcpy(news, buf, len);
news[len] = 0;
*s = news;
return 0;
}
int qmail_init(void)
{
str path = { 0,0,0 };
const char* tmp;
if ((tmp = getenv("QMAIL_ROOT")) != 0)
qmail_root = tmp;
if (read_control("envnoathost", &qmail_envnoathost, &path) != 0)
return -1;
if (read_control("me", &qmail_me, &path) != 0)
return -1;
if (qmail_envnoathost == 0)
qmail_envnoathost = (qmail_me == 0) ? "envnoathost" : qmail_me;
if (qmail_me == 0)
qmail_me = "me";
str_free(&path);
return 0;
}
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