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mimedefang-multiplexor.c
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mimedefang-multiplexor.c
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/***********************************************************************
*
* mimedefang-multiplexor.c
*
* Main program which manages a pool of e-mail scanning processes.
*
* Copyright (C) 2001-2005 Roaring Penguin Software Inc.
* http://www.roaringpenguin.com
*
* This program may be distributed under the terms of the GNU General
* Public License, Version 2.
*
***********************************************************************/
#include "config.h"
#include "event_tcp.h"
#include "mimedefang.h"
#ifdef HAVE_GETOPT_H
#include <getopt.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_STDINT_H
#include <stdint.h>
#include <inttypes.h>
#define BIG_INT int64_t
#define BIG_INT_FMT PRIi64
#elif HAVE_LONG_LONG_INT
#define BIG_INT long long
#define BIG_INT_FMT "lld"
#else
#define BIG_INT long
#define BIG_INT_FMT "ld"
#endif
#include <time.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <sys/stat.h>
#include <signal.h>
#include <fcntl.h>
#include <syslog.h>
#include <stdarg.h>
#include <pwd.h>
#ifdef HAVE_SETRLIMIT
#include <sys/resource.h>
static void limit_mem_usage(unsigned long rss, unsigned long as);
#endif
static char *pidfile = NULL;
static char *lockfile = NULL;
/* Number of file descriptors to close when forking */
#define CLOSEFDS 256
/* Weird case, but hey... */
#if defined(HAVE_WAIT3) && !defined(HAVE_SETRLIMIT)
#include <sys/resource.h>
#endif
#define STR(x) STR2(x)
#define STR2(x) #x
#define MAX_CMD_LEN 4096 /* Maximum length of command from mimedefang */
#define MAX_DIR_LEN 511 /* Maximum length of working directory */
#define MAX_QID_LEN 31 /* Maximum length of a Sendmail queue-id */
#define MAX_STATUS_LEN 64 /* Maximum length of status tag */
#define MAX_UNPRIV_CONNS 20 /* Maximum number of simultaneous unprivileged connections */
#define MAX_DOMAIN_LEN 128 /* Maximum length of a domain name for tracking per-domain recipok workers */
#define DOLOG Settings.doSyslog
#define WORKERNO(s) ((int) ((s) - AllWorkers))
/* A worker can be in one of four states:
Stopped -- Worker has no associated Perl process
Idle -- Worker has an associated process, but is not doing work
Busy -- Worker is processing a command
Killed -- Worker has been killed, but we're waiting for it to exit */
#define STATE_STOPPED 0
#define STATE_IDLE 1
#define STATE_BUSY 2
#define STATE_KILLED 3
#define NUM_WORKER_STATES 4
/* Structure of a worker process */
typedef struct Worker_t {
struct Worker_t *next; /* Link in free/busy list */
EventSelector *es; /* Event selector */
pid_t pid; /* Process ID of worker process */
int numRequests; /* Number of requests handled by worker */
int numScans; /* Number of messages scanned */
time_t idleTime; /* Time when worker became idle */
time_t activationTime; /* Time when worker was activated */
time_t firstReqTime; /* Time when worker received its first job */
time_t lastStateChange; /* Time when worker last changed state */
unsigned int activated; /* Activation order */
int workerStdin; /* Worker's stdin descriptor */
int workerStdout; /* Worker's stdout descriptor */
int workerStderr; /* Worker's stderr descriptor */
int workerStatusFD; /* File descriptor for worker status reports */
int clientFD; /* Client file descriptor */
int oom; /* Did worker run out of memory? */
EventTcpState *event; /* Pending event handler */
EventHandler *errHandler; /* Read handler for stderr */
EventHandler *statusHandler; /* Read handler for status descriptor */
EventHandler *termHandler; /* Timer after which we send SIGTERM */
char workdir[MAX_DIR_LEN+1]; /* Working directory for current scan */
char qid[MAX_QID_LEN+1]; /* Current Sendmail queue ID */
char status_tag[MAX_STATUS_LEN]; /* Status tag */
char domain[MAX_DOMAIN_LEN]; /* Current domain for recipok */
int generation; /* Worker's generation */
int state; /* Worker's state */
unsigned int histo; /* Kind of double-duty as histogram value */
int tick_no; /* Which tick are we handling? */
struct timeval start_cmd; /* Time when current command started */
int cmd; /* Which of the 4 commands with history? */
int last_cmd; /* Last command executed */
} Worker;
/* A queued request */
typedef struct Request_t {
struct Request_t *next; /* Next request in linked list */
EventSelector *es; /* Event selector */
EventHandler *timeoutHandler; /* Time out if we're queued too long */
int fd; /* File descriptor for client communication */
char *cmd; /* Command to send to worker */
} Request;
#define MAX_QUEUE_SIZE 128 /* Hard-coded limit */
Request RequestQueue[MAX_QUEUE_SIZE];
int NumQueuedRequests = 0;
Request *RequestHead;
Request *RequestTail;
Worker *AllWorkers; /* Array of all workers */
Worker *Workers[NUM_WORKER_STATES]; /* Lists of workers in each state */
int WorkerCount[NUM_WORKER_STATES]; /* Count of workers in each state */
int Generation = 0; /* Current generation */
int NumMsgsProcessed = 0; /* Number of messages processed since last
"msgs" query */
unsigned int Activations = 0; /* Incremented when a worker is activated */
static int Old_NumFreeWorkers = -1;
int NumUnprivConnections = 0;
static pid_t ParentPid = (pid_t) -1;
static char **Env;
struct Settings_t {
int minWorkers; /* Minimum number of workers to keep running */
int maxWorkers; /* Maximum possible number of workers */
int maxRecipokPerDomain; /* Maximum workers doing recipok for a given domain */
int maxRequests; /* Maximum number of requests per worker */
int maxLifetime; /* Maximum lifetime of a worker in seconds. */
int maxIdleTime; /* Excess workers should be killed after time */
int busyTimeout; /* Timeout after which we kill scanner */
int clientTimeout; /* Timeout for client request/reply */
int slewTime; /* Time to wait between workers' activation */
int waitTime; /* Minimum time to wait between activations */
int doSyslog; /* If true, log various things with syslog */
char const *sockName; /* Socket name for talking to mimedefang */
char const *progPath; /* Program to execute for filter */
char const *statsFile; /* File name for logging statistics */
char const *subFilter; /* Sub-filter to pass to filter */
char const *unprivSockName; /* Socket for unprivileged commands */
char const *spoolDir; /* Spool directory to chdir into */
FILE *statsFP; /* File pointer for stats file */
int statsToSyslog; /* If true, log stats using syslog */
int flushStats; /* If non-zero, flush stats file after write*/
unsigned long maxRSS; /* Maximum RSS for workers (if supported) */
unsigned long maxAS; /* Maximum address space for workers */
int logStatusInterval; /* How often to log status to syslog */
char const *mapSock; /* Socket for Sendmail TCP map requests */
int requestQueueSize;
int requestQueueTimeout;
int listenBacklog; /* Listen backlog */
int useEmbeddedPerl; /* Use embedded Perl interpreter */
char const *notifySock; /* Socket for notifications */
int tick_interval; /* Do "tick" request every tick_interval s */
int num_ticks; /* How many tick types to cycle through */
char const *syslog_label; /* Syslog label */
int wantStatusReports; /* Do we want status reports from workers? */
int debugWorkerScheduling; /* Log details about worker scheduling */
} Settings;
/* Structure for keeping statistics on number of messages processed in
last 10 minutes */
#define NO_CMD -2
#define OTHER_CMD -1
#define MIN_CMD 0
#define SCAN_CMD 0
#define RELAYOK_CMD 1
#define SENDEROK_CMD 2
#define RECIPOK_CMD 3
#define MAX_CMD 3
#define NUM_CMDS (MAX_CMD+1)
static char *CmdName[] = {
"scan",
"relayok",
"senderok",
"recipok"
};
/* Not real commands */
#define HISTORY_SECONDS (10*60)
#define HISTORY_HOURS 24
typedef struct {
time_t first; /* Time at which first entry was made */
time_t last; /* Time at which last entry was made */
int elapsed; /* Seconds or hours since epoch for this bucket */
int count; /* Number of messages processed */
int workers; /* TOTAL number of workers (active workers * count) */
int ms; /* TOTAL scan time in milliseconds */
int activated; /* Number of workers activated */
int reaped; /* Number of workers reaped */
} HistoryBucket;
static HistoryBucket history[NUM_CMDS][HISTORY_SECONDS];
static HistoryBucket hourly_history[NUM_CMDS][HISTORY_HOURS];
/* Pipe written on reception of SIGCHLD */
static int Pipe[2] = {-1, -1};
#ifndef HAVE_SIG_ATOMIC_T
#define sig_atomic_t int
#endif
static volatile sig_atomic_t ReapPending = 0;
static volatile sig_atomic_t HupPending = 0;
static volatile sig_atomic_t IntPending = 0;
static volatile sig_atomic_t CharPending = 0;
static int DebugEvents = 0;
static time_t LastWorkerActivation = (time_t) 0;
static time_t TimeOfProgramStart = (time_t) 0;
extern int drop_privs(char const *user, uid_t uid, gid_t gid);
extern int find_syslog_facility(char const *facility_name);
/* Prototypes */
#ifdef HAVE_WAIT3
static void log_worker_resource_usage(Worker *s, struct rusage *usage);
#endif
extern int make_notifier_socket(EventSelector *es, char const *name);
extern void notify_listeners(EventSelector *es, char const *msg);
extern void notify_worker_status(EventSelector *es, int workerno,
char const *status);
extern void notify_worker_state_change(EventSelector *es,
int workerno,
char const *old_state,
char const *new_state);
static Worker *findFreeWorker(int cmdno);
static void shutDescriptors(Worker *s);
static void reapTerminatedWorkers(int killed);
static Worker *findWorkerByPid(pid_t pid);
static int update_worker_status(Worker *s, char const *buf);
static void set_worker_status_from_command(Worker *s, char const *buf);
static pid_t activateWorker(Worker *s, char const *reason);
static void killWorker(Worker *s, char const *reason);
static void terminateWorker(EventSelector *es, int fd, unsigned int flags,
void *data);
static void nukeWorker(EventSelector *es, int fd, unsigned int flags,
void *data);
/* List-management functions */
static void unlinkFromList(Worker *s);
static void putOnList(Worker *s, int state);
static void handleAccept(EventSelector *es, int fd);
static void handleUnprivAccept(EventSelector *es, int fd);
static void handleCommand(EventSelector *es, int fd,
char *buf, int len, int flag, void *data);
static void handleWorkerReceivedCommand(EventSelector *es, int fd,
char *buf, int len, int flag,
void *data);
static void handleWorkerReceivedTick(EventSelector *es, int fd,
char *buf, int len, int flag,
void *data);
static void handleWorkerReceivedAnswer(EventSelector *es, int fd,
char *buf, int len, int flag,
void *data);
static void handleWorkerReceivedAnswerFromTick(EventSelector *es, int fd,
char *buf, int len, int flag,
void *data);
static void doScan(EventSelector *es, int fd, char *cmd);
static void doWorkerInfo(EventSelector *es, int fd, char *cmd);
static void doScanAux(EventSelector *es, int fd, char *cmd, int queueable);
static void doStatus(EventSelector *es, int fd);
static void doHelp(EventSelector *es, int fd, int unpriv);
static void doWorkerReport(EventSelector *es, int fd, int only_busy);
static void doLoad(EventSelector *es, int fd, int cmd);
static void doLoad1(EventSelector *es, int fd, int back);
static void doHourlyLoad(EventSelector *es, int fd, int cmd);
static void doHistogram(EventSelector *es, int fd);
static void doWorkerCommand(EventSelector *es, int fd, char *cmd);
static void doWorkerCommandAux(EventSelector *es, int fd, char *cmd, int queueable);
static void checkWorkerForExpiry(Worker *s);
static void handlePipe(EventSelector *es,
int fd, unsigned int flags, void *data);
static void handleWorkerStderr(EventSelector *es,
int fd,
unsigned int flags,
void *data);
static void handleWorkerStatusFD(EventSelector *es,
int fd,
unsigned int flags,
void *data);
static void childHandler(int sig);
static void hupHandler(int sig);
static void intHandler(int sig);
static void sigterm(int sig);
static void newGeneration(void);
static void handleIdleTimeout(EventSelector *es, int fd, unsigned int flags,
void *data);
static void doStatusLog(EventSelector *es, int fd, unsigned int flags,
void *data);
static void logWorkerReaped(Worker *s, int status);
static int queue_request(EventSelector *es, int fd, char *cmd);
static int handle_queued_request(void);
static void handleRequestQueueTimeout(EventSelector *es, int fd,
unsigned int flags, void *data);
static void statsReopenFile(void);
static void statsLog(char const *event, int workerno, char const *fmt, ...);
static void bringWorkersUpToMin(EventSelector *es, int fd, unsigned int flags,
void *data);
static void scheduleBringWorkersUpToMin(EventSelector *es);
static int minScheduled = 0;
static void schedule_tick(EventSelector *es, int tick_no);
static void handleMapAccept(EventSelector *es, int fd);
static void init_history(void);
static HistoryBucket *get_history_bucket(int cmd);
static HistoryBucket *get_hourly_history_bucket(int cmd);
static int get_history_totals(int cmd, time_t now, int back, int *total, int *workers, BIG_INT *ms, int *activated, int *reaped);
static int get_hourly_history_totals(int cmd, time_t now, int hours, int *total, int *workers, BIG_INT *ms, int *secs);
#define NUM_FREE_WORKERS (WorkerCount[STATE_IDLE] + WorkerCount[STATE_STOPPED])
#define NUM_RUNNING_WORKERS (WorkerCount[STATE_IDLE] + WorkerCount[STATE_BUSY] + WorkerCount[STATE_KILLED])
#define REPORT_FAILURE(msg) do { if (kidpipe[1] >= 0) { write(kidpipe[1], "E" msg, strlen(msg)+1); } else { fprintf(stderr, "%s\n", msg); } } while(0)
/**********************************************************************
* %FUNCTION: state_name
* %ARGUMENTS:
* state -- a state number
* %RETURNS:
* A string representing the name of the state
***********************************************************************/
static char const *
state_name(int state)
{
switch(state) {
case STATE_STOPPED: return "Stopped";
case STATE_IDLE: return "Idle";
case STATE_BUSY: return "Busy";
case STATE_KILLED: return "Killed";
}
return "Unknown";
}
/**********************************************************************
* %FUNCTION: state_name_lc
* %ARGUMENTS:
* state -- a state number
* %RETURNS:
* A string representing the name of the state in all lower-case
***********************************************************************/
static char const *
state_name_lc(int state)
{
switch(state) {
case STATE_STOPPED: return "stopped";
case STATE_IDLE: return "idle";
case STATE_BUSY: return "busy";
case STATE_KILLED: return "killed";
}
return "unknown";
}
/**********************************************************************
* %FUNCTION: reply_to_mimedefang_with_len
* %ARGUMENTS:
* es -- event selector
* fd -- file descriptor
* msg -- message to send back
* len -- length of message
* %RETURNS:
* The event associated with the reply, or NULL.
* %DESCRIPTION:
* Sends a final message back to mimedefang. Closes fd after message has
* been sent.
***********************************************************************/
static EventTcpState *
reply_to_mimedefang_with_len(EventSelector *es,
int fd,
char const *msg,
int len)
{
EventTcpState *e;
if (len == 0) {
/* Nothing to say. */
close(fd);
return NULL;
}
e = EventTcp_WriteBuf(es, fd, msg, len, NULL,
Settings.clientTimeout, NULL);
if (!e) {
if (DOLOG) {
syslog(LOG_ERR, "reply_to_mimedefang: EventTcp_WriteBuf failed: %m");
}
close(fd);
}
return e;
}
/**********************************************************************
* %FUNCTION: reply_to_mimedefang
* %ARGUMENTS:
* es -- event selector
* fd -- file descriptor
* msg -- message to send back
* %RETURNS:
* The event associated with the reply, or NULL.
* %DESCRIPTION:
* Sends a final message back to mimedefang.
***********************************************************************/
EventTcpState *
reply_to_mimedefang(EventSelector *es,
int fd,
char const *msg)
{
return reply_to_mimedefang_with_len(es, fd, msg, strlen(msg));
}
/**********************************************************************
* %FUNCTION: findWorkerByPid
* %ARGUMENTS:
* pid -- Process-ID we're looking for
* %RETURNS:
* The worker with given pid, or NULL if not found
* %DESCRIPTION:
* Searches the killed, idle and busy lists for specified worker.
***********************************************************************/
static Worker *
findWorkerByPid(pid_t pid)
{
Worker *s;
/* Most likely to be on killed list, so search there first */
s = Workers[STATE_KILLED];
while(s) {
if (s->pid == pid) return s;
s = s->next;
}
s = Workers[STATE_IDLE];
while(s) {
if (s->pid == pid) return s;
s = s->next;
}
s = Workers[STATE_BUSY];
while(s) {
if (s->pid == pid) return s;
s = s->next;
}
return NULL;
}
/**********************************************************************
* %FUNCTION: usage
* %ARGUMENTS:
* None
* %RETURNS:
* Nothing (exits)
* %DESCRIPTION:
* Prints usage information
***********************************************************************/
static void
usage(void)
{
fprintf(stderr, "mimedefang-multiplexor version %s\n", VERSION);
fprintf(stderr, "Usage: mimedefang-multiplexor [options]\n");
fprintf(stderr, "Options:\n");
fprintf(stderr, " -h -- Print usage info and exit\n");
fprintf(stderr, " -v -- Print version and exit\n");
fprintf(stderr, " -t filename -- Log statistics to filename\n");
fprintf(stderr, " -p filename -- Write process-ID in filename\n");
fprintf(stderr, " -o file -- Use specified file as a lock file\n");
fprintf(stderr, " -T -- Log statistics to syslog\n");
fprintf(stderr, " -u -- Flush stats file after each write\n");
fprintf(stderr, " -Z -- Accept and process status updates from busy workers\n");
fprintf(stderr, " -U username -- Run as username, not root\n");
fprintf(stderr, " -m minWorkers -- Minimum number of workers\n");
fprintf(stderr, " -x maxWorkers -- Maximum number of workers\n");
fprintf(stderr, " -y recipokPerDom -- Maximum concurrent recipoks per domain\n");
fprintf(stderr, " -r maxRequests -- Maximum number of requests per worker\n");
fprintf(stderr, " -V maxLifetime -- Maximum lifetime of a worker in seconds\n");
fprintf(stderr, " -i idleTime -- Idle time (seconds) for killing excess workers\n");
fprintf(stderr, " -b busyTime -- Busy time (seconds) for killing hung workers\n");
fprintf(stderr, " -c cmdTime -- Request/reply transmission timeout (seconds)\n");
fprintf(stderr, " -w waitTime -- How long to wait between worker activations (seconds)\n");
fprintf(stderr, " -W waitTime -- Absolute minimum to wait between worker activations\n");
fprintf(stderr, " -z dir -- Spool directory\n");
fprintf(stderr, " -s sock -- UNIX-domain socket for communication\n");
fprintf(stderr, " -a u_sock -- Socket for unprivileged communication\n");
fprintf(stderr, " -f /dir/filter -- Specify full path of filter program\n");
fprintf(stderr, " -d -- Debug events in /var/log/mdefang-event-debug.log\n");
fprintf(stderr, " -l -- Log events with syslog\n");
#ifdef HAVE_SETRLIMIT
fprintf(stderr, " -R size -- Limit RSS to size kB (if supported on your OS)\n");
fprintf(stderr, " -M size -- Limit memory address space to size kB\n");
#endif
fprintf(stderr, " -L interval -- Log worker status every interval seconds\n");
fprintf(stderr, " -S facility -- Set syslog(3) facility\n");
fprintf(stderr, " -N sock -- Listen for Sendmail map requests on sock\n");
fprintf(stderr, " -O sock -- Listen for notification requests on sock\n");
fprintf(stderr, " -q size -- Size of request queue (default 0)\n");
fprintf(stderr, " -Q timeout -- Timeout for queued requests\n");
fprintf(stderr, " -I backlog -- 'backlog' argument for listen on multiplexor socket\n");
fprintf(stderr, " -D -- Do not become a daemon (stay in foreground)\n");
fprintf(stderr, " -X interval -- Run a 'tick' request every interval seconds\n");
fprintf(stderr, " -P n -- Run 'n' parallel tick requests\n");
fprintf(stderr, " -Y label -- Set syslog label to 'label'\n");
fprintf(stderr, " -G -- Make sockets group-writable\n");
#ifdef EMBED_PERL
fprintf(stderr, " -E -- Use embedded Perl interpreter\n");
#endif
exit(EXIT_FAILURE);
}
static int
set_sigchld_handler(void)
{
struct sigaction act;
/* Set signal handler for SIGCHLD */
act.sa_handler = childHandler;
sigemptyset(&act.sa_mask);
act.sa_flags = SA_NOCLDSTOP | SA_RESTART;
return sigaction(SIGCHLD, &act, NULL);
}
/**********************************************************************
* %FUNCTION: main
* %ARGUMENTS:
* argc, argv -- usual suspects
* %RETURNS:
* Nothing -- runs in an infinite loop
* %DESCRIPTION:
* Main program
***********************************************************************/
int
main(int argc, char *argv[], char **env)
{
int i;
int sock, unpriv_sock;
int c;
int n;
int pidfile_fd = -1;
int lockfile_fd = -1;
char *user = NULL;
char *options;
int facility = LOG_MAIL;
int kidpipe[2] = {-1, -1};
char kidmsg[256];
time_t now;
mode_t socket_umask = 077;
mode_t file_umask = 077;
EventSelector *es;
struct sigaction act;
struct timeval t;
struct passwd *pw = NULL;
int nodaemon = 0;
/* Record program start time */
TimeOfProgramStart = time(NULL);
Env = env;
/* Paranoia time */
umask(077);
/* Paranoia time II */
if (getuid() != geteuid()) {
fprintf(stderr, "ERROR: %s is NOT intended to run suid! Exiting.\n",
argv[0]);
exit(EXIT_FAILURE);
}
if (getgid() != getegid()) {
fprintf(stderr, "ERROR: %s is NOT intended to run sgid! Exiting.\n",
argv[0]);
exit(EXIT_FAILURE);
}
Settings.minWorkers = 0;
Settings.maxWorkers = 2;
Settings.maxRecipokPerDomain = 0;
Settings.maxRequests = 500;
Settings.maxLifetime = 0; /* Unlimited */
Settings.maxIdleTime = 300;
Settings.busyTimeout = 120;
Settings.slewTime = 3;
Settings.waitTime = 0;
Settings.clientTimeout = 10;
Settings.doSyslog = 0;
Settings.spoolDir = NULL;
Settings.sockName = NULL;
Settings.unprivSockName = NULL;
Settings.progPath = MIMEDEFANG_PL;
Settings.subFilter = NULL;
Settings.statsFile = NULL;
Settings.statsFP = NULL;
Settings.flushStats = 0;
Settings.statsToSyslog = 0;
Settings.maxRSS = 0;
Settings.maxAS = 0;
Settings.logStatusInterval = 0;
Settings.requestQueueSize = 0;
Settings.requestQueueTimeout = 30;
Settings.listenBacklog = -1;
Settings.useEmbeddedPerl = 0;
Settings.notifySock = NULL;
Settings.tick_interval = 0;
Settings.num_ticks = 1;
Settings.mapSock = NULL;
Settings.wantStatusReports = 0;
Settings.debugWorkerScheduling = 0;
#ifndef HAVE_SETRLIMIT
options = "GAa:Tt:um:x:y:r:i:b:c:s:hdlf:p:o:w:F:W:U:S:q:Q:I:DEO:X:Y:N:vZP:z:V:";
#else
options = "GAa:Tt:um:x:y:r:i:b:c:s:hdlf:p:o:w:F:W:U:S:q:Q:L:R:M:I:DEO:X:Y:N:vZP:z:V:";
#endif
while((c = getopt(argc, argv, options)) != -1) {
switch(c) {
case 'G':
socket_umask = 007;
file_umask = 027;
break;
case 'A':
Settings.debugWorkerScheduling = 1;
break;
case 'z':
Settings.spoolDir = strdup(optarg);
if (!Settings.spoolDir) {
fprintf(stderr, "%s: Out of memory\n", argv[0]);
exit(EXIT_FAILURE);
}
break;
case 'Z':
Settings.wantStatusReports = 1;
break;
case 'a':
Settings.unprivSockName = strdup(optarg);
if (!Settings.unprivSockName) {
fprintf(stderr, "%s: Out of memory\n", argv[0]);
exit(EXIT_FAILURE);
}
break;
case 'v':
printf("mimedefang-multiplexor version %s\n", VERSION);
exit(EXIT_SUCCESS);
case 'E':
#ifdef EMBED_PERL
Settings.useEmbeddedPerl = 1;
#else
fprintf(stderr, "mimedefang-multiplexor compiled without support for embedded perl. Ignoring -E flag.\n");
#endif
break;
case 'D':
nodaemon = 1;
break;
case 'P':
if (sscanf(optarg, "%d", &n) != 1) usage();
if (n < 1) {
n = 1;
} else if (n > 30) {
n = 30;
}
Settings.num_ticks = n;
break;
case 'I':
if (sscanf(optarg, "%d", &n) != 1) usage();
if (n < 5) {
n = 5;
} else if (n > 200) {
n = 200;
}
Settings.listenBacklog = n;
break;
case 'q':
if (sscanf(optarg, "%d", &n) != 1) usage();
if (n <= 0) {
n = 0;
} else if (n > MAX_QUEUE_SIZE) {
fprintf(stderr, "%s: Request queue size %d too big (%d max)\n",
argv[0], n, MAX_QUEUE_SIZE);
exit(EXIT_FAILURE);
}
Settings.requestQueueSize = n;
break;
case 'X':
if (sscanf(optarg, "%d", &n) != 1) usage();
if (n < 0) {
n = 0;
}
Settings.tick_interval = n;
break;
case 'Q':
if (sscanf(optarg, "%d", &n) != 1) usage();
if (n <= 1) {
n = 1;
} else if (n > 600) {
n = 600;
}
Settings.requestQueueTimeout = n;
break;
case 'S':
facility = find_syslog_facility(optarg);
if (facility < 0) {
fprintf(stderr, "%s: Unknown syslog facility %s\n",
argv[0], optarg);
exit(EXIT_FAILURE);
}
break;
case 'L':
if (sscanf(optarg, "%d", &n) != 1) usage();
if (n <= 0) {
n = 0;
} else if (n < 5) {
n = 5;
}
Settings.logStatusInterval = n;
break;
case 'R':
case 'M':
if (sscanf(optarg, "%d", &n) != 1) usage();
if (c == 'R') {
Settings.maxRSS = (unsigned long) n;
} else {
Settings.maxAS = (unsigned long) n;
}
break;
case 'Y':
Settings.syslog_label = strdup(optarg);
if (!Settings.syslog_label) {
fprintf(stderr, "%s: Out of memory\n", argv[0]);
exit(EXIT_FAILURE);
}
break;
case 'O':
Settings.notifySock = strdup(optarg);
if (!Settings.notifySock) {
fprintf(stderr, "%s: Out of memory\n", argv[0]);
exit(EXIT_FAILURE);
}
break;
case 'N':
Settings.mapSock = strdup(optarg);
if (!Settings.mapSock) {
fprintf(stderr, "%s: Out of memory\n", argv[0]);
exit(EXIT_FAILURE);
}
break;
case 'U':
/* User to run as */
if (user) {
free(user);
}
user = strdup(optarg);
if (!user) {
fprintf(stderr, "%s: Out of memory\n", argv[0]);
exit(EXIT_FAILURE);
}
break;
case 'F':
/* Sub-filter */
if (Settings.subFilter) {
free((void *) Settings.subFilter);
}
Settings.subFilter = strdup(optarg);
if (!Settings.subFilter) {
fprintf(stderr, "%s: Out of memory\n", argv[0]);
exit(EXIT_FAILURE);
}
break;
case 'W':
/* Absolute minimum to wait between each worker's start-up */
if (sscanf(optarg, "%d", &Settings.waitTime) != 1) usage();
if (Settings.waitTime < 0) {
Settings.waitTime = 0;
}
break;
case 'w':
/* How long to wait between each worker's start-up */
if (sscanf(optarg, "%d", &Settings.slewTime) != 1) usage();
if (Settings.slewTime < 1) {
Settings.slewTime = 1;
}
break;
case 'p':
/* Write our pid to this file */
if (pidfile != NULL) free(pidfile);
pidfile = strdup(optarg);
if (!pidfile) {
fprintf(stderr, "%s: Out of memory\n", argv[0]);
exit(EXIT_FAILURE);
}
break;
case 'o':
/* Use this as our lock file */
if (lockfile != NULL) free(lockfile);
lockfile = strdup(optarg);
if (!lockfile) {
fprintf(stderr, "%s: Out of memory\n", argv[0]);
exit(EXIT_FAILURE);
}
break;
case 'f':
/* Filter program */
if (optarg[0] != '/') {
fprintf(stderr, "%s: -f: You must supply an absolute path for filter program\n", argv[0]);
exit(EXIT_FAILURE);
}
Settings.progPath = strdup(optarg);
if (!Settings.progPath) {
fprintf(stderr, "%s: Out of memory\n", argv[0]);
exit(EXIT_FAILURE);
}
break;
case 'u':
Settings.flushStats = 1;
break;
case 't':
Settings.statsFile = strdup(optarg);
if (!Settings.statsFile) {
fprintf(stderr, "%s: Out of memory\n", argv[0]);
exit(EXIT_FAILURE);
}
break;
case 'T':
Settings.statsToSyslog = 1;
break;
case 'l':
Settings.doSyslog = 1;
break;
case 'd':
DebugEvents = 1;
break;
case 'h':
usage();
break;
case 'm':
if (sscanf(optarg, "%d", &Settings.minWorkers) != 1) usage();
if (Settings.minWorkers < 1) Settings.minWorkers = 1;
break;
case 'x':
if (sscanf(optarg, "%d", &Settings.maxWorkers) != 1) usage();
break;
case 'y':
if (sscanf(optarg, "%d", &Settings.maxRecipokPerDomain) != 1) usage();
break;
case 'r':
if (sscanf(optarg, "%d", &Settings.maxRequests) != 1) usage();
if (Settings.maxRequests < 1) Settings.maxRequests = 1;
break;
case 'V':
if (sscanf(optarg, "%d", &Settings.maxLifetime) != 1) usage();
if (Settings.maxLifetime <= 0) {
Settings.maxLifetime = -1;
}
break;
case 'i':
if (sscanf(optarg, "%d", &Settings.maxIdleTime) != 1) usage();
if (Settings.maxIdleTime < 10) Settings.maxIdleTime = 10;
break;
case 'b':
if (sscanf(optarg, "%d", &Settings.busyTimeout) != 1) usage();
if (Settings.busyTimeout < 10) Settings.busyTimeout = 10;
break;
case 'c':
if (sscanf(optarg, "%d", &Settings.clientTimeout) != 1) usage();
if (Settings.clientTimeout < 10) Settings.clientTimeout = 10;
break;
case 's':
Settings.sockName = strdup(optarg);
if (!Settings.sockName) {
fprintf(stderr, "%s: Out of memory\n", argv[0]);
exit(EXIT_FAILURE);
}
break;
default:
fprintf(stderr, "\n");
usage();
}
}
/* Set spooldir, if it's not set */
if (!Settings.spoolDir) {
Settings.spoolDir = SPOOLDIR;
}
/* Set sockName, if it's not set */
if (!Settings.sockName) {
Settings.sockName = malloc(strlen(Settings.spoolDir) + strlen("/mimedefang-multiplexor.sock") + 1);
if (!Settings.sockName) {
fprintf(stderr, "%s: Out of memory\n", argv[0]);
exit(EXIT_FAILURE);
}
strcpy((char *) Settings.sockName, Settings.spoolDir);
strcat((char *) Settings.sockName, "/mimedefang-multiplexor.sock");
}
/* Open the pidfile as root. We'll write the pid later on in the grandchild */
if (pidfile) {
pidfile_fd = open(pidfile, O_RDWR|O_CREAT, 0666);
if (pidfile_fd < 0) {
syslog(LOG_ERR, "Could not open PID file %s: %m", pidfile);
exit(EXIT_FAILURE);
}
/* It needs to be world-readable */
fchmod(pidfile_fd, 0644);
}
/* Drop privileges */
if (user) {
pw = getpwnam(user);
if (!pw) {
fprintf(stderr, "%s: Unknown user '%s'\n", argv[0], user);
exit(EXIT_FAILURE);
}
if (drop_privs(user, pw->pw_uid, pw->pw_gid) < 0) {
exit(EXIT_FAILURE);
}
free(user);
}
/* Warn */
if (!getuid() || !geteuid()) {
fprintf(stderr,
"ERROR: You must not run mimedefang-multiplexor as root.\n"
"Use the -U option to set a non-root user.\n");
exit(EXIT_FAILURE);
}
if (chdir(Settings.spoolDir) < 0) {
fprintf(stderr, "%s: Unable to chdir(%s): %s\n",
argv[0], Settings.spoolDir, strerror(errno));
exit(EXIT_FAILURE);
}
/* Fix obvious stupidities */
if (Settings.maxWorkers < 1) {
Settings.maxWorkers = 1;
}
if (Settings.minWorkers < 1) {
Settings.minWorkers = 1;
}
if (Settings.minWorkers > Settings.maxWorkers) {
Settings.minWorkers = Settings.maxWorkers;
}