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/*++
/* NAME
/* master_conf 3
/* SUMMARY
/* Postfix master - master.cf file processing
/* SYNOPSIS
/* #include "master.h"
/*
/* void master_config(serv)
/* MASTER_SERV *serv;
/*
/* void master_refresh(serv)
/* MASTER_SERV *serv;
/* DESCRIPTION
/* Use master_config() to read the master.cf configuration file
/* during program initialization.
/*
/* Use master_refresh() to re-read the master.cf configuration file
/* when the process is already running.
/* DIAGNOSTICS
/* BUGS
/* SEE ALSO
/* master_ent(3), configuration file programmatic interface.
/* 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
/*
/* Wietse Venema
/* Google, Inc.
/* 111 8th Avenue
/* New York, NY 10011, USA
/*--*/
/* System libraries. */
#include <sys_defs.h>
#include <unistd.h>
#include <string.h>
/* Utility library. */
#include <msg.h>
#include <argv.h>
/* Application-specific. */
#include "master.h"
/* master_refresh - re-read configuration table */
void master_refresh(void)
{
MASTER_SERV *serv;
MASTER_SERV **servp;
/*
* Mark all existing services.
*/
for (serv = master_head; serv != 0; serv = serv->next)
serv->flags |= MASTER_FLAG_MARK;
/*
* Read the master.cf configuration file. The master_conf() routine
* unmarks services upon update. New services are born with the mark bit
* off. After this, anything with the mark bit on should be removed.
*/
master_config();
/*
* Delete all services that are still marked - they disappeared from the
* configuration file and are therefore no longer needed.
*/
for (servp = &master_head; (serv = *servp) != 0; /* void */ ) {
if ((serv->flags & MASTER_FLAG_MARK) != 0) {
*servp = serv->next;
master_stop_service(serv);
free_master_ent(serv);
} else {
servp = &serv->next;
}
}
}
/* master_config - read config file */
void master_config(void)
{
MASTER_SERV *entry;
MASTER_SERV *serv;
#define STR_DIFF strcmp
#define STR_SAME !strcmp
#define SWAP(type,a,b) { type temp = a; a = b; b = temp; }
/*
* A service is identified by its endpoint name AND by its transport
* type, not just by its name alone. The name is unique within its
* transport type. XXX Service privacy is encoded in the service name.
*/
set_master_ent();
while ((entry = get_master_ent()) != 0) {
if (msg_verbose)
print_master_ent(entry);
for (serv = master_head; serv != 0; serv = serv->next)
if (STR_SAME(serv->name, entry->name) && serv->type == entry->type)
break;
/*
* Add a new service entry. We do not really care in what order the
* service entries are kept in memory.
*/
if (serv == 0) {
entry->next = master_head;
master_head = entry;
master_start_service(entry);
}
/*
* Update an existing service entry. Make the current generation of
* child processes commit suicide whenever it is convenient. The next
* generation of child processes will run with the new configuration
* settings.
*/
else {
if ((serv->flags & MASTER_FLAG_MARK) == 0)
msg_warn("duplicate master.cf entry for service \"%s\" (%s) "
"-- using the last entry", serv->ext_name, serv->name);
else
serv->flags &= ~MASTER_FLAG_MARK;
if (entry->flags & MASTER_FLAG_CONDWAKE)
serv->flags |= MASTER_FLAG_CONDWAKE;
else
serv->flags &= ~MASTER_FLAG_CONDWAKE;
serv->wakeup_time = entry->wakeup_time;
serv->max_proc = entry->max_proc;
serv->throttle_delay = entry->throttle_delay;
SWAP(char *, serv->ext_name, entry->ext_name);
SWAP(char *, serv->path, entry->path);
SWAP(ARGV *, serv->args, entry->args);
SWAP(char *, serv->stress_param_val, entry->stress_param_val);
master_restart_service(serv, DO_CONF_RELOAD);
free_master_ent(entry);
}
}
end_master_ent();
}
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