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NetBSD/gnu/dist/postfix/global/mail_params.c

344 lines
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/*++
/* NAME
/* mail_params 3
/* SUMMARY
/* global mail configuration parameters
/* SYNOPSIS
/* #include <mail_params.h>
/*
/* char *var_myhostname;
/* char *var_mydomain;
/* char *var_myorigin;
/* char *var_mydest;
/* char *var_relayhost;
/* char *var_transit_origin;
/* char *var_transit_dest;
/* char *var_mail_name;
/* char *var_mail_owner;
/* uid_t var_owner_uid;
/* gid_t var_owner_gid;
/* char *var_default_privs;
/* uid_t var_default_uid;
/* gid_t var_default_gid;
/* char *var_config_dir;
/* char *var_program_dir;
/* char *var_daemon_dir;
/* char *var_command_dir;
/* char *var_queue_dir;
/* int var_use_limit;
/* int var_idle_limit;
/* int var_bundle_rcpt;
/* char *var_procname;
/* int var_pid;
/* int var_ipc_timeout;
/* char *var_pid_dir;
/* int var_dont_remove;
/* char *var_inet_interfaces;
/* char *var_mynetworks;
/* char *var_double_bounce_sender;
/* int var_line_limit;
/* char *var_alias_db_map;
/* int var_message_limit;
/* char *var_mail_version;
/* int var_ipc_idle_limit;
/* char *var_db_type;
/* char *var_hash_queue_names;
/* int var_hash_queue_depth;
/* int var_trigger_timeout;
/* char *var_rcpt_delim;
/* int var_fork_tries;
/* int var_fork_delay;
/* int var_flock_tries;
/* int var_flock_delay;
/* int var_flock_stale;
/* int var_mailtool_compat;
/* int var_disable_dns;
/* int var_soft_bounce;
/* time_t var_starttime;
/* int var_ownreq_special;
/* int var_daemon_timeout;
/*
/* void mail_params_init()
/* DESCRIPTION
/* This module (actually the associated include file) define the names
/* and defaults of all mail configuration parameters.
/*
/* mail_params_init() initializes the built-in parameters listed above.
/* These parameters are relied upon by library routines, so they are
/* initialized globally so as to avoid hard-to-find errors due to
/* missing initialization. This routine must be called early, at
/* least before entering a chroot jail.
/* DIAGNOSTICS
/* Fatal errors: out of memory; null system or domain name.
/* LICENSE
/* .ad
/* .fi
/* The Secure Mailer license must be distributed with this software.
/* AUTHOR(S)
/* Wietse Venema
/* IBM T.J. Watson Research
/* P.O. Box 704
/* Yorktown Heights, NY 10598, USA
/*--*/
/* System library. */
#include <sys_defs.h>
#include <unistd.h>
#include <string.h>
#include <pwd.h>
#include <time.h>
#ifdef STRCASECMP_IN_STRINGS_H
#include <strings.h>
#endif
/* Utility library. */
#include <msg.h>
#include <get_hostname.h>
#include <valid_hostname.h>
#include <stringops.h>
/* Global library. */
#include "mynetworks.h"
#include "mail_conf.h"
#include "mail_version.h"
#include "mail_params.h"
/*
* Special configuration variables.
*/
char *var_myhostname;
char *var_mydomain;
char *var_myorigin;
char *var_mydest;
char *var_relayhost;
char *var_transit_origin;
char *var_transit_dest;
char *var_mail_name;
char *var_mail_owner;
uid_t var_owner_uid;
gid_t var_owner_gid;
char *var_default_privs;
uid_t var_default_uid;
gid_t var_default_gid;
char *var_config_dir;
char *var_program_dir;
char *var_daemon_dir;
char *var_command_dir;
char *var_queue_dir;
int var_use_limit;
int var_idle_limit;
int var_bundle_rcpt;
char *var_procname;
int var_pid;
int var_ipc_timeout;
char *var_pid_dir;
int var_dont_remove;
char *var_inet_interfaces;
char *var_mynetworks;
char *var_double_bounce_sender;
int var_line_limit;
char *var_alias_db_map;
int var_message_limit;
char *var_mail_version;
int var_ipc_idle_limit;
char *var_db_type;
char *var_hash_queue_names;
int var_hash_queue_depth;
int var_trigger_timeout;
char *var_rcpt_delim;
int var_fork_tries;
int var_fork_delay;
int var_flock_tries;
int var_flock_delay;
int var_flock_stale;
int var_mailtool_compat;
int var_disable_dns;
int var_soft_bounce;
time_t var_starttime;
int var_ownreq_special;
int var_daemon_timeout;
/* check_myhostname - lookup hostname and validate */
static const char *check_myhostname(void)
{
static const char *name;
const char *dot;
const char *domain;
/*
* Use cached result.
*/
if (name)
return (name);
/*
* If the local machine name is not in FQDN form, try to append the
* contents of $mydomain.
*/
name = get_hostname();
if ((dot = strchr(name, '.')) == 0) {
if ((domain = mail_conf_lookup_eval(VAR_MYDOMAIN)) == 0)
msg_fatal("My hostname %s is not a fully qualified name - set %s or %s in %s/main.cf",
name, VAR_MYHOSTNAME, VAR_MYDOMAIN, var_config_dir);
name = concatenate(name, ".", domain, (char *) 0);
}
return (name);
}
/* check_mydomainname - lookup domain name and validate */
static const char *check_mydomainname(void)
{
char *dot;
/*
* Use the hostname when it is not a FQDN ("foo"), or when the hostname
* actually is a domain name ("foo.com").
*/
if ((dot = strchr(var_myhostname, '.')) == 0 || strchr(dot + 1, '.') == 0)
return (var_myhostname);
return (dot + 1);
}
/* check_default_privs - lookup default user attributes and validate */
static void check_default_privs(void)
{
struct passwd *pwd;
if ((pwd = getpwnam(var_default_privs)) == 0)
msg_fatal("unknown %s configuration parameter value: %s",
VAR_DEFAULT_PRIVS, var_default_privs);
if ((var_default_uid = pwd->pw_uid) == 0)
msg_fatal("%s: %s: privileged user is not allowed",
VAR_DEFAULT_PRIVS, var_default_privs);
if ((var_default_gid = pwd->pw_gid) == 0)
msg_fatal("%s: %s: privileged group is not allowed",
VAR_DEFAULT_PRIVS, var_default_privs);
}
/* check_mail_owner - lookup owner user attributes and validate */
static void check_mail_owner(void)
{
struct passwd *pwd;
if ((pwd = getpwnam(var_mail_owner)) == 0)
msg_fatal("unknown %s configuration parameter value: %s",
VAR_MAIL_OWNER, var_mail_owner);
if ((var_owner_uid = pwd->pw_uid) == 0)
msg_fatal("%s: %s: privileged user is not allowed",
VAR_MAIL_OWNER, var_mail_owner);
if ((var_owner_gid = pwd->pw_gid) == 0)
msg_fatal("%s: %s: privileged group is not allowed",
VAR_DEFAULT_PRIVS, var_mail_owner);
}
/* mail_params_init - configure built-in parameters */
void mail_params_init()
{
static CONFIG_STR_FN_TABLE function_str_defaults[] = {
VAR_MYHOSTNAME, check_myhostname, &var_myhostname, 1, 0,
VAR_MYDOMAIN, check_mydomainname, &var_mydomain, 1, 0,
0,
};
static CONFIG_STR_TABLE other_str_defaults[] = {
VAR_MAIL_NAME, DEF_MAIL_NAME, &var_mail_name, 1, 0,
VAR_MAIL_OWNER, DEF_MAIL_OWNER, &var_mail_owner, 1, 0,
VAR_MYDEST, DEF_MYDEST, &var_mydest, 0, 0,
VAR_MYORIGIN, DEF_MYORIGIN, &var_myorigin, 1, 0,
VAR_RELAYHOST, DEF_RELAYHOST, &var_relayhost, 0, 0,
VAR_PROGRAM_DIR, DEF_PROGRAM_DIR, &var_program_dir, 1, 0,
VAR_DAEMON_DIR, DEF_DAEMON_DIR, &var_daemon_dir, 1, 0,
VAR_COMMAND_DIR, DEF_COMMAND_DIR, &var_command_dir, 1, 0,
VAR_QUEUE_DIR, DEF_QUEUE_DIR, &var_queue_dir, 1, 0,
VAR_PID_DIR, DEF_PID_DIR, &var_pid_dir, 1, 0,
VAR_INET_INTERFACES, DEF_INET_INTERFACES, &var_inet_interfaces, 1, 0,
VAR_DOUBLE_BOUNCE, DEF_DOUBLE_BOUNCE, &var_double_bounce_sender, 1, 0,
VAR_DEFAULT_PRIVS, DEF_DEFAULT_PRIVS, &var_default_privs, 1, 0,
VAR_ALIAS_DB_MAP, DEF_ALIAS_DB_MAP, &var_alias_db_map, 1, 0,
VAR_MAIL_VERSION, DEF_MAIL_VERSION, &var_mail_version, 1, 0,
VAR_DB_TYPE, DEF_DB_TYPE, &var_db_type, 1, 0,
VAR_HASH_QUEUE_NAMES, DEF_HASH_QUEUE_NAMES, &var_hash_queue_names, 1, 0,
VAR_RCPT_DELIM, DEF_RCPT_DELIM, &var_rcpt_delim, 0, 1,
0,
};
static CONFIG_STR_FN_TABLE function_str_defaults_2[] = {
VAR_MYNETWORKS, mynetworks, &var_mynetworks, 1, 0,
0,
};
static CONFIG_INT_TABLE other_int_defaults[] = {
VAR_MAX_USE, DEF_MAX_USE, &var_use_limit, 1, 0,
VAR_MAX_IDLE, DEF_MAX_IDLE, &var_idle_limit, 1, 0,
VAR_IPC_TIMEOUT, DEF_IPC_TIMEOUT, &var_ipc_timeout, 1, 0,
VAR_DONT_REMOVE, DEF_DONT_REMOVE, &var_dont_remove, 0, 0,
VAR_LINE_LIMIT, DEF_LINE_LIMIT, &var_line_limit, 512, 0,
VAR_MESSAGE_LIMIT, DEF_MESSAGE_LIMIT, &var_message_limit, 0, 0,
VAR_IPC_IDLE, DEF_IPC_IDLE, &var_ipc_idle_limit, 1, 0,
VAR_HASH_QUEUE_DEPTH, DEF_HASH_QUEUE_DEPTH, &var_hash_queue_depth, 1, 0,
VAR_TRIGGER_TIMEOUT, DEF_TRIGGER_TIMEOUT, &var_trigger_timeout, 1, 0,
VAR_FORK_TRIES, DEF_FORK_TRIES, &var_fork_tries, 1, 0,
VAR_FORK_DELAY, DEF_FORK_DELAY, &var_fork_delay, 1, 0,
VAR_FLOCK_TRIES, DEF_FLOCK_TRIES, &var_flock_tries, 1, 0,
VAR_FLOCK_DELAY, DEF_FLOCK_DELAY, &var_flock_delay, 1, 0,
VAR_FLOCK_STALE, DEF_FLOCK_STALE, &var_flock_stale, 1, 0,
VAR_DAEMON_TIMEOUT, DEF_DAEMON_TIMEOUT, &var_daemon_timeout, 1, 0,
0,
};
static CONFIG_BOOL_TABLE bool_defaults[] = {
VAR_DISABLE_DNS, DEF_DISABLE_DNS, &var_disable_dns,
VAR_SOFT_BOUNCE, DEF_SOFT_BOUNCE, &var_soft_bounce,
VAR_OWNREQ_SPECIAL, DEF_OWNREQ_SPECIAL, &var_ownreq_special,
VAR_MAILTOOL_COMPAT, DEF_MAILTOOL_COMPAT, &var_mailtool_compat,
0,
};
/*
* Variables whose defaults are determined at runtime. Some sites use
* short hostnames in the host table; some sites name their system after
* the domain.
*/
get_mail_conf_str_fn_table(function_str_defaults);
if (!valid_hostname(var_myhostname) || !valid_hostname(var_mydomain))
msg_fatal("host or domain name configuration error");
/*
* Variables that are needed by almost every program.
*/
get_mail_conf_str_table(other_str_defaults);
get_mail_conf_int_table(other_int_defaults);
get_mail_conf_bool_table(bool_defaults);
check_default_privs();
check_mail_owner();
/*
* Variables whose defaults are determined at runtime, after other
* variables have been set. This dependency is admittedly a bit tricky.
* XXX Perhaps we should just register variables, and let the evaluator
* figure out in what order to evaluate things.
*/
get_mail_conf_str_fn_table(function_str_defaults_2);
/*
* The PID variable cannot be set from the configuration file!!
*/
set_mail_conf_int(VAR_PID, var_pid = getpid());
/*
* Neither can the start time variable. It isn't even visible.
*/
time(&var_starttime);
/*
* I have seen this happen just too often.
*/
if (strcasecmp(var_myhostname, var_relayhost) == 0)
msg_fatal("myhostname == relayhost");
}
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