int main(int argc, char *argv[])
{
int c = 0;
int maxcore = 0;
bool do_daemonize = false;
char *pid_file = "/tmp/memlockd.pid";
char *username = NULL;
struct passwd *pw = NULL;
struct rlimit rlim;
/* register signal callback */
signals_init();
/* init settings */
settings_init();
/* set stderr non-buffering (for running under, say, daemontools) */
setbuf(stderr, NULL);
/* process arguments */
while ((c = getopt(argc, argv, "a:U:p:s:c:hivl:dru:P:t")) != -1) {
switch (c) {
case 'a':
/* access for unix domain socket, as octal mask (like chmod)*/
settings.access = strtol(optarg, NULL, 8);
break;
case 'p':
settings.port = atoi(optarg);
break;
case 's':
settings.socketpath = optarg;
break;
case 'c':
settings.maxconns = atoi(optarg);
break;
case 'h':
usage();
exit(EXIT_SUCCESS);
case 'i':
usage_license();
exit(EXIT_SUCCESS);
case 'v':
settings.verbose++;
break;
case 'l':
settings.inter = strdup(optarg);
break;
case 'd':
do_daemonize = true;
break;
case 'r':
maxcore = 1;
break;
case 'u':
username = optarg;
break;
case 'P':
pid_file = optarg;
break;
#ifdef USE_THREADS
case 't':
settings.num_threads = atoi(optarg);
if (0 == settings.num_threads) {
fprintf(stderr, "Number of threads must be greater than 0\n");
exit(EXIT_FAILURE);
}
break;
#endif
default:
fprintf(stderr, "Illegal argument \"%c\"\n", c);
exit(EXIT_FAILURE);
}
}
/*
* If needed, increase rlimits to allow as many connections
* as needed.
*/
if (getrlimit(RLIMIT_NOFILE, &rlim) != 0) {
fprintf(stderr, "failed to getrlimit number of files\n");
exit(EXIT_FAILURE);
}
else {
int maxfiles = settings.maxconns;
if (rlim.rlim_cur < maxfiles) {
rlim.rlim_cur = maxfiles + 3;
}
if (rlim.rlim_max < rlim.rlim_cur) {
rlim.rlim_max = rlim.rlim_cur;
}
if (setrlimit(RLIMIT_NOFILE, &rlim) != 0) {
fprintf(stderr, "failed to set rlimit for open files. Try "
"running as root or requesting smaller maxconns value.\n");
exit(EXIT_FAILURE);
}
}
/* do_daemonize if requested */
/* if we want to ensure our ability to dump core, don't chdir to / */
if (do_daemonize) {
int res = 0;
res = daemon_init();
if (res != 0) {
fprintf(stderr, "failed to daemon() in order to do_daemonize\n");
return -1;
}
}
/* lose root privileges if we have them */
if (0 == getuid() || 0 == geteuid()) {
if (NULL == username || '\0' == *username) {
fprintf(stderr, "can't run as root without the -u switch\n");
return -1;
}
if ((pw = getpwnam(username)) == NULL) {
fprintf(stderr, "can't find the user %s to switch to\n", username);
return 1;
}
if (setgid(pw->pw_gid) < 0 || setuid(pw->pw_uid) < 0) {
fprintf(stderr, "failed to assume identity of user %s\n", username);
return 1;
}
}
/* initialize main thread libevent instance */
main_base = event_init();
/* initialize other stuff */
hashlist_init();
conn_init();
stats.started = time(NULL);
/* start up worker threads if MT mode */
//thread_init(settings.num_threads, main_base);
if (do_daemonize) {
if (daemon_already_running(pid_file) < 0) {
fprintf(stderr, "server is already running.\n");
exit(EXIT_FAILURE);
}
}
INIT_LIST_HEAD(&listen_conn);
/* create unix mode sockets after dropping privileges */
if (settings.socketpath != NULL) {
if (socket_unix_init(settings.socketpath, settings.access)) {
fprintf(stderr, "failed to listen\n");
exit(EXIT_FAILURE);
}
}
/* create the listening socket, bind it, and init */
if (settings.socketpath == NULL) {
if (socket_init(settings.port) < 0) {
fprintf(stderr, "failed to listen\n");
exit(EXIT_FAILURE);
}
}
/* start checkpoint and deadlock detect thread */
/* enter the event loop */
event_base_loop(main_base, 0);
hashlist_close();
if (do_daemonize) {
unlink(pid_file);
}
return 0;
}
int main(int argc, char *argv[])
{
int c;
int do_daemonize= 0;
int maxcore = 0;
struct rlimit rlim;
char unit = '\0';
int size_max = 0;
int protocol_specified = 0;
int tcp_specified = 0;
int udp_specified = 0;
char *subopts;
char *subopts_value;
enum {
MAXCONNS_FAST = 0,
HASHPOWER_INIT,
SLAB_REASSIGN,
SLAB_AUTOMOVE
};
char *const subopts_tokens[] = {
[MAXCONNS_FAST] = "maxconns_fast",
[HASHPOWER_INIT]= "hashpower",
[SLAB_REASSIGN] = "slab_reassign",
[SLAB_AUTOMOVE] = "slab_automove",
NULL
};
/* init settings */
settings_init();
/* set stderr non-buffering (for running under, say, daemontools) */
setbuf(stderr, NULL);
/* process arguments */
while (-1 != (c = getopt(argc, argv,
"a:" /* access mask for unix socket */
"A" /* enable admin shutdown commannd */
"p:" /* TCP port number to listen on */
"s:" /* unix socket path to listen on */
"U:" /* UDP port number to listen on */
"m:" /* max memory to use for items in megabytes */
"M" /* return error on memory exhausted */
"c:" /* max simultaneous connections */
"hi" /* help, licence info */
"r" /* maximize core file limit */
"v" /* verbose */
"d" /* daemon mode */
"l:" /* interface to listen on */
"f:" /* factor? */
"n:" /* minimum space allocated for key+value+flags */
"D:" /* prefix delimiter? */
"L" /* Large memory pages */
"R:" /* max requests per event */
"C" /* Disable use of CAS */
"b:" /* backlog queue limit */
"B:" /* Binding protocol */
"I:" /* Max item size */
"S" /* Sasl ON */
"o:" /* Extended generic options */
))) {
switch (c) {
case 'A':
/* enables "shutdown" command */
settings.shutdown_command = 1;
break;
case 'a':
/* access for unix domain socket, as octal mask (like chmod)*/
settings.access= strtol(optarg,NULL,8);
break;
case 'U':
settings.udpport = atoi(optarg);
udp_specified = 1;
break;
case 'p':
settings.port = atoi(optarg);
tcp_specified = 1;
break;
case 's':
settings.socketpath = optarg;
break;
case 'm':
settings.maxbytes = ((size_t)atoi(optarg)) * 1024 * 1024;
break;
case 'M':
settings.evict_to_free = 0;
break;
case 'c':
settings.maxconns = atoi(optarg);
break;
case 'h':
usage();
exit(EXIT_SUCCESS);
case 'i':
usage_license();
exit(EXIT_SUCCESS);
case 'v':
settings.verbose++;
break;
case 'l':
if (settings.inter != NULL) {
size_t len = strlen(settings.inter) + strlen(optarg) + 2;
char *p = malloc(len);
if (p == NULL) {
fprintf(stderr, "Failed to allocate memory\n");
return 1;
}
snprintf(p, len, "%s,%s", settings.inter, optarg);
free(settings.inter);
settings.inter = p;
} else {
settings.inter= strdup(optarg);
}
break;
case 'd':
do_daemonize = 1;
break;
case 'r':
maxcore = 1;
break;
case 'R':
settings.reqs_per_event = atoi(optarg);
if (settings.reqs_per_event == 0) {
fprintf(stderr, "Number of requests per event must be greater than 0\n");
return 1;
}
break;
case 'f':
if (atof(optarg) <= 1.0) {
fprintf(stderr, "Factor must be greater than 1\n");
return 1;
}
double_int(optarg, &settings.factor_numerator, &settings.factor_denominator);
break;
case 'n':
settings.chunk_size = atoi(optarg);
if (settings.chunk_size == 0) {
fprintf(stderr, "Chunk size must be greater than 0\n");
return 1;
}
break;
case 'D':
if (! optarg || ! optarg[0]) {
fprintf(stderr, "No delimiter specified\n");
return 1;
}
settings.prefix_delimiter = optarg[0];
settings.detail_enabled = 1;
break;
case 'L' :
if (enable_large_pages() == 0) {
settings.preallocate = 1;
} else {
fprintf(stderr, "Cannot enable large pages on this system\n"
"(There is no Linux support as of this version)\n");
return 1;
}
break;
case 'C' :
settings.use_cas = 0;
break;
case 'b' :
settings.backlog = atoi(optarg);
break;
case 'B':
protocol_specified = 1;
if (strcmp(optarg, "auto") == 0) {
settings.binding_protocol = negotiating_prot;
} else if (strcmp(optarg, "binary") == 0) {
settings.binding_protocol = binary_prot;
} else if (strcmp(optarg, "ascii") == 0) {
settings.binding_protocol = ascii_prot;
} else {
fprintf(stderr, "Invalid value for binding protocol: %s\n"
" -- should be one of auto, binary, or ascii\n", optarg);
exit(EX_USAGE);
}
break;
case 'I':
unit = optarg[strlen(optarg)-1];
if (unit == 'k' || unit == 'm' ||
unit == 'K' || unit == 'M') {
optarg[strlen(optarg)-1] = '\0';
size_max = atoi(optarg);
if (unit == 'k' || unit == 'K')
size_max *= 1024;
if (unit == 'm' || unit == 'M')
size_max *= 1024 * 1024;
settings.item_size_max = size_max;
} else {
settings.item_size_max = atoi(optarg);
}
if (settings.item_size_max < 1024) {
fprintf(stderr, "Item max size cannot be less than 1024 bytes.\n");
return 1;
}
if (settings.item_size_max > 1024 * 1024 * 128) {
fprintf(stderr, "Cannot set item size limit higher than 128 mb.\n");
return 1;
}
if (settings.item_size_max > 1024 * 1024) {
fprintf(stderr, "WARNING: Setting item max size above 1MB is not"
" recommended!\n"
" Raising this limit increases the minimum memory requirements\n"
" and will decrease your memory efficiency.\n"
);
}
break;
case 'S': /* set Sasl authentication to 1. Default is 0 */
#ifndef ENABLE_SASL
fprintf(stderr, "This server is not built with SASL support.\n");
exit(EX_USAGE);
#endif
settings.sasl = 1;
break;
case 'o': /* It's sub-opts time! */
subopts = optarg;
while (*subopts != '\0') {
switch (getsubopt(&subopts, subopts_tokens, &subopts_value)) {
case MAXCONNS_FAST:
settings.maxconns_fast = 1;
break;
case HASHPOWER_INIT:
if (subopts_value == NULL) {
fprintf(stderr, "Missing numeric argument for hashpower\n");
return 1;
}
settings.hashpower_init = atoi(subopts_value);
if (settings.hashpower_init < 12) {
fprintf(stderr, "Initial hashtable multiplier of %d is too low\n",
settings.hashpower_init);
return 1;
} else if (settings.hashpower_init > 64) {
fprintf(stderr, "Initial hashtable multiplier of %d is too high\n"
"Choose a value based on \"STAT hash_power_level\" from a running instance\n",
settings.hashpower_init);
return 1;
}
break;
case SLAB_REASSIGN:
settings.slab_reassign = 1;
break;
case SLAB_AUTOMOVE:
if (subopts_value == NULL) {
settings.slab_automove = 1;
break;
}
settings.slab_automove = atoi(subopts_value);
if (settings.slab_automove < 0 || settings.slab_automove > 2) {
fprintf(stderr, "slab_automove must be between 0 and 2\n");
return 1;
}
break;
default:
printf("Illegal suboption \"%s\"\n", subopts_value);
return 1;
}
}
break;
default:
fprintf(stderr, "Illegal argument \"%c\"\n", c);
return 1;
}
}
/*
* Use one workerthread to serve each UDP port if the user specified
* multiple ports
*/
if (settings.inter != NULL && strchr(settings.inter, ',')) {
settings.num_threads_per_udp = 1;
} else {
settings.num_threads_per_udp = 0x7fffffff;
}
if (settings.sasl) {
if (!protocol_specified) {
settings.binding_protocol = binary_prot;
} else {
if (settings.binding_protocol != binary_prot) {
fprintf(stderr, "ERROR: You cannot allow the ASCII protocol while using SASL.\n");
exit(EX_USAGE);
}
}
}
if (tcp_specified && !udp_specified) {
settings.udpport = settings.port;
} else if (udp_specified && !tcp_specified) {
settings.port = settings.udpport;
}
if (maxcore != 0) {
struct rlimit rlim_new;
/*
* First try raising to infinity; if that fails, try bringing
* the soft limit to the hard.
*/
if (getrlimit(RLIMIT_CORE, &rlim) == 0) {
rlim_new.rlim_cur = rlim_new.rlim_max = RLIM_INFINITY;
if (setrlimit(RLIMIT_CORE, &rlim_new)!= 0) {
/* failed. try raising just to the old max */
rlim_new.rlim_cur = rlim_new.rlim_max = rlim.rlim_max;
(void)setrlimit(RLIMIT_CORE, &rlim_new);
}
}
/*
* getrlimit again to see what we ended up with. Only fail if
* the soft limit ends up 0, because then no core files will be
* created at all.
*/
if ((getrlimit(RLIMIT_CORE, &rlim) != 0) || rlim.rlim_cur == 0) {
fprintf(stderr, "failed to ensure corefile creation\n");
exit(EX_OSERR);
}
}
/*
* If needed, increase rlimits to allow as many connections
* as needed.
*/
if (getrlimit(RLIMIT_NOFILE, &rlim) != 0) {
fprintf(stderr, "failed to getrlimit number of files\n");
exit(EX_OSERR);
} else {
rlim.rlim_cur = settings.maxconns;
rlim.rlim_max = settings.maxconns;
if (setrlimit(RLIMIT_NOFILE, &rlim) != 0) {
fprintf(stderr, "failed to set rlimit for open files. Try starting as root or requesting smaller maxconns value.\n");
exit(EX_OSERR);
}
}
/* lose root privileges if we have them */
if (getuid() != 0 || geteuid() != 0) {
fprintf(stderr, "run as root\n");
exit(EX_USAGE);
}
/* Initialize Sasl if -S was specified */
if (settings.sasl) {
// init_sasl();
}
/* daemonize if requested */
/* if we want to ensure our ability to dump core, don't chdir to / */
if (do_daemonize) {
if (sigignore(SIGHUP) == -1) {
perror("Failed to ignore SIGHUP");
}
if (daemonize(maxcore, settings.verbose) == -1) {
fprintf(stderr, "failed to daemon() in order to daemonize\n");
exit(EXIT_FAILURE);
}
}
main_loop();
return 0;
}
int main (int argc, char **argv) {
int c;
conn *l_conn;
struct in_addr addr;
int lock_memory = 0;
int daemonize = 0;
int maxcore = 0;
char *username = 0;
struct passwd *pw;
struct sigaction sa;
struct rlimit rlim;
char *pid_file = NULL;
/* init settings */
settings_init();
/* process arguments */
while ((c = getopt(argc, argv, "p:m:Mc:khirvdl:u:P:")) != -1) {
switch (c) {
case 'p':
settings.port = atoi(optarg);
break;
case 'm':
settings.maxbytes = atoi(optarg)*1024*1024;
break;
case 'M':
settings.evict_to_free = 0;
break;
case 'c':
settings.maxconns = atoi(optarg);
break;
case 'h':
usage();
exit(0);
case 'i':
usage_license();
exit(0);
case 'k':
lock_memory = 1;
break;
case 'v':
settings.verbose++;
break;
case 'l':
if (!inet_aton(optarg, &addr)) {
fprintf(stderr, "Illegal address: %s\n", optarg);
return 1;
} else {
settings.interface = addr;
}
break;
case 'd':
daemonize = 1;
break;
case 'r':
maxcore = 1;
break;
case 'u':
username = optarg;
break;
case 'P':
pid_file = optarg;
break;
default:
fprintf(stderr, "Illegal argument \"%c\"\n", c);
return 1;
}
}
if (maxcore) {
struct rlimit rlim_new;
/*
* First try raising to infinity; if that fails, try bringing
* the soft limit to the hard.
*/
if (getrlimit(RLIMIT_CORE, &rlim)==0) {
rlim_new.rlim_cur = rlim_new.rlim_max = RLIM_INFINITY;
if (setrlimit(RLIMIT_CORE, &rlim_new)!=0) {
/* failed. try raising just to the old max */
rlim_new.rlim_cur = rlim_new.rlim_max =
rlim.rlim_max;
(void) setrlimit(RLIMIT_CORE, &rlim_new);
}
}
/*
* getrlimit again to see what we ended up with. Only fail if
* the soft limit ends up 0, because then no core files will be
* created at all.
*/
if ((getrlimit(RLIMIT_CORE, &rlim)!=0) || rlim.rlim_cur==0) {
fprintf(stderr, "failed to ensure corefile creation\n");
exit(1);
}
}
/*
* If needed, increase rlimits to allow as many connections
* as needed.
*/
if (getrlimit(RLIMIT_NOFILE, &rlim) != 0) {
fprintf(stderr, "failed to getrlimit number of files\n");
exit(1);
} else {
int maxfiles = settings.maxconns;
if (rlim.rlim_cur < maxfiles)
rlim.rlim_cur = maxfiles + 3;
if (rlim.rlim_max < rlim.rlim_cur)
rlim.rlim_max = rlim.rlim_cur;
if (setrlimit(RLIMIT_NOFILE, &rlim) != 0) {
fprintf(stderr, "failed to set rlimit for open files. Try running as root or requesting smaller maxconns value.\n");
exit(1);
}
}
/*
* initialization order: first create the listening socket
* (may need root on low ports), then drop root if needed,
* then daemonise if needed, then init libevent (in some cases
* descriptors created by libevent wouldn't survive forking).
*/
/* create the listening socket and bind it */
l_socket = server_socket(settings.port);
if (l_socket == -1) {
fprintf(stderr, "failed to listen\n");
exit(1);
}
/* lose root privileges if we have them */
if (getuid()== 0 || geteuid()==0) {
if (username==0 || *username=='\0') {
fprintf(stderr, "can't run as root without the -u switch\n");
return 1;
}
if ((pw = getpwnam(username)) == 0) {
fprintf(stderr, "can't find the user %s to switch to\n", username);
return 1;
}
if (setgid(pw->pw_gid)<0 || setuid(pw->pw_uid)<0) {
fprintf(stderr, "failed to assume identity of user %s\n", username);
return 1;
}
}
/* daemonize if requested */
/* if we want to ensure our ability to dump core, don't chdir to / */
if (daemonize) {
int res;
res = daemon(maxcore, settings.verbose);
if (res == -1) {
fprintf(stderr, "failed to daemon() in order to daemonize\n");
return 1;
}
}
/* initialize other stuff */
item_init();
event_init();
stats_init();
assoc_init();
conn_init();
slabs_init(settings.maxbytes);
/* lock paged memory if needed */
if (lock_memory) {
#ifdef HAVE_MLOCKALL
mlockall(MCL_CURRENT | MCL_FUTURE);
#else
fprintf(stderr, "warning: mlockall() not supported on this platform. proceeding without.\n");
#endif
}
/*
* ignore SIGPIPE signals; we can use errno==EPIPE if we
* need that information
*/
sa.sa_handler = SIG_IGN;
sa.sa_flags = 0;
if (sigemptyset(&sa.sa_mask) == -1 ||
sigaction(SIGPIPE, &sa, 0) == -1) {
perror("failed to ignore SIGPIPE; sigaction");
exit(1);
}
/* create the initial listening connection */
if (!(l_conn = conn_new(l_socket, conn_listening, EV_READ | EV_PERSIST))) {
fprintf(stderr, "failed to create listening connection");
exit(1);
}
/* initialise deletion array and timer event */
deltotal = 200;
delcurr = 0;
todelete = malloc(sizeof(item *)*deltotal);
delete_handler(0,0,0); /* sets up the event */
/* save the PID in if we're a daemon */
if (daemonize)
save_pid(getpid(),pid_file);
/* enter the loop */
event_loop(0);
/* remove the PID file if we're a daemon */
if (daemonize)
remove_pidfile(pid_file);
return 0;
}