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freebsd-nq/usr.sbin/rpc.lockd/lockd.c

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/* $NetBSD: lockd.c,v 1.7 2000/08/12 18:08:44 thorpej Exp $ */
/* $FreeBSD$ */
/*
* Copyright (c) 1995
* A.R. Gordon (andrew.gordon@net-tel.co.uk). All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed for the FreeBSD project
* 4. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY ANDREW GORDON AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
#include <sys/cdefs.h>
#ifndef lint
__RCSID("$NetBSD: lockd.c,v 1.7 2000/08/12 18:08:44 thorpej Exp $");
#endif
/*
* main() function for NFS lock daemon. Most of the code in this
* file was generated by running rpcgen /usr/include/rpcsvc/nlm_prot.x.
*
* The actual program logic is in the file lock_proc.c
*/
#include <sys/param.h>
#include <sys/linker.h>
#include <sys/module.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <syslog.h>
#include <signal.h>
#include <string.h>
#include <unistd.h>
#include <libutil.h>
#include <netconfig.h>
#include <netdb.h>
#include <rpc/rpc.h>
#include <rpc/rpc_com.h>
#include <rpcsvc/sm_inter.h>
#include "lockd.h"
#include <rpcsvc/nlm_prot.h>
int debug_level = 0; /* 0 = no debugging syslog() calls */
int _rpcsvcdirty = 0;
int grace_expired;
int nsm_state;
int kernel_lockd;
pid_t client_pid;
struct mon mon_host;
char **hosts, *svcport_str = NULL;
int nhosts = 0;
int xcreated = 0;
char **addrs; /* actually (netid, uaddr) pairs */
int naddrs; /* count of how many (netid, uaddr) pairs */
void create_service(struct netconfig *nconf);
void lookup_addresses(struct netconfig *nconf);
void init_nsm(void);
void nlm_prog_0(struct svc_req *, SVCXPRT *);
void nlm_prog_1(struct svc_req *, SVCXPRT *);
void nlm_prog_3(struct svc_req *, SVCXPRT *);
void nlm_prog_4(struct svc_req *, SVCXPRT *);
void out_of_mem(void);
void usage(void);
void sigalarm_handler(void);
/*
* XXX move to some header file.
*/
#define _PATH_RPCLOCKDSOCK "/var/run/rpclockd.sock"
int
main(int argc, char **argv)
{
int ch, i, s;
void *nc_handle;
char *endptr, **hosts_bak;
struct sigaction sigalarm;
int grace_period = 30;
struct netconfig *nconf;
int have_v6 = 1;
int maxrec = RPC_MAXDATASIZE;
in_port_t svcport = 0;
while ((ch = getopt(argc, argv, "d:g:h:p:")) != (-1)) {
switch (ch) {
case 'd':
debug_level = atoi(optarg);
if (!debug_level) {
usage();
/* NOTREACHED */
}
break;
case 'g':
grace_period = atoi(optarg);
if (!grace_period) {
usage();
/* NOTREACHED */
}
break;
case 'h':
++nhosts;
hosts_bak = hosts;
hosts_bak = realloc(hosts, nhosts * sizeof(char *));
if (hosts_bak == NULL) {
if (hosts != NULL) {
for (i = 0; i < nhosts; i++)
free(hosts[i]);
free(hosts);
out_of_mem();
}
}
hosts = hosts_bak;
hosts[nhosts - 1] = strdup(optarg);
if (hosts[nhosts - 1] == NULL) {
for (i = 0; i < (nhosts - 1); i++)
free(hosts[i]);
free(hosts);
out_of_mem();
}
break;
case 'p':
endptr = NULL;
svcport = (in_port_t)strtoul(optarg, &endptr, 10);
if (endptr == NULL || *endptr != '\0' ||
svcport == 0 || svcport >= IPPORT_MAX)
usage();
svcport_str = strdup(optarg);
break;
default:
case '?':
usage();
/* NOTREACHED */
}
}
if (geteuid()) { /* This command allowed only to root */
fprintf(stderr, "Sorry. You are not superuser\n");
exit(1);
}
kernel_lockd = FALSE;
if (modfind("nfslockd") < 0) {
if (kldload("nfslockd") < 0) {
fprintf(stderr, "Can't find or load kernel support for rpc.lockd - using non-kernel implementation\n");
}
kernel_lockd = TRUE;
} else {
kernel_lockd = TRUE;
}
(void)rpcb_unset(NLM_PROG, NLM_SM, NULL);
(void)rpcb_unset(NLM_PROG, NLM_VERS, NULL);
(void)rpcb_unset(NLM_PROG, NLM_VERSX, NULL);
(void)rpcb_unset(NLM_PROG, NLM_VERS4, NULL);
/*
* Check if IPv6 support is present.
*/
s = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP);
if (s < 0)
have_v6 = 0;
else
close(s);
rpc_control(RPC_SVC_CONNMAXREC_SET, &maxrec);
/*
* If no hosts were specified, add a wildcard entry to bind to
* INADDR_ANY. Otherwise make sure 127.0.0.1 and ::1 are added to the
* list.
*/
if (nhosts == 0) {
hosts = malloc(sizeof(char**));
if (hosts == NULL)
out_of_mem();
hosts[0] = "*";
nhosts = 1;
} else {
hosts_bak = hosts;
if (have_v6) {
hosts_bak = realloc(hosts, (nhosts + 2) *
sizeof(char *));
if (hosts_bak == NULL) {
for (i = 0; i < nhosts; i++)
free(hosts[i]);
free(hosts);
out_of_mem();
} else
hosts = hosts_bak;
nhosts += 2;
hosts[nhosts - 2] = "::1";
} else {
hosts_bak = realloc(hosts, (nhosts + 1) * sizeof(char *));
if (hosts_bak == NULL) {
for (i = 0; i < nhosts; i++)
free(hosts[i]);
free(hosts);
out_of_mem();
} else {
nhosts += 1;
hosts = hosts_bak;
}
}
hosts[nhosts - 1] = "127.0.0.1";
}
if (kernel_lockd) {
/*
* For the kernel lockd case, we run a cut-down RPC
* service on a local-domain socket. The kernel's RPC
* server will pass what it can't handle (mainly
* client replies) down to us. This can go away
* entirely if/when we move the client side of NFS
* locking into the kernel.
*/
struct sockaddr_un sun;
int fd, oldmask;
SVCXPRT *xprt;
memset(&sun, 0, sizeof sun);
sun.sun_family = AF_LOCAL;
unlink(_PATH_RPCLOCKDSOCK);
strcpy(sun.sun_path, _PATH_RPCLOCKDSOCK);
sun.sun_len = SUN_LEN(&sun);
fd = socket(AF_LOCAL, SOCK_STREAM, 0);
if (!fd) {
err(1, "Can't create local lockd socket");
}
oldmask = umask(S_IXUSR|S_IRWXG|S_IRWXO);
if (bind(fd, (struct sockaddr *) &sun, sun.sun_len) < 0) {
err(1, "Can't bind local lockd socket");
}
umask(oldmask);
if (listen(fd, SOMAXCONN) < 0) {
err(1, "Can't listen on local lockd socket");
}
xprt = svc_vc_create(fd, RPC_MAXDATASIZE, RPC_MAXDATASIZE);
if (!xprt) {
err(1, "Can't create transport for local lockd socket");
}
if (!svc_reg(xprt, NLM_PROG, NLM_VERS4, nlm_prog_4, NULL)) {
err(1, "Can't register service for local lockd socket");
}
/*
* We need to look up the addresses so that we can
* hand uaddrs (ascii encoded address+port strings) to
* the kernel.
*/
nc_handle = setnetconfig();
while ((nconf = getnetconfig(nc_handle))) {
/* We want to listen only on udp6, tcp6, udp, tcp transports */
if (nconf->nc_flag & NC_VISIBLE) {
/* Skip if there's no IPv6 support */
if (have_v6 == 0 && strcmp(nconf->nc_protofmly, "inet6") == 0) {
/* DO NOTHING */
} else {
lookup_addresses(nconf);
}
}
}
endnetconfig(nc_handle);
} else {
nc_handle = setnetconfig();
while ((nconf = getnetconfig(nc_handle))) {
/* We want to listen only on udp6, tcp6, udp, tcp transports */
if (nconf->nc_flag & NC_VISIBLE) {
/* Skip if there's no IPv6 support */
if (have_v6 == 0 && strcmp(nconf->nc_protofmly, "inet6") == 0) {
/* DO NOTHING */
} else {
create_service(nconf);
}
}
}
endnetconfig(nc_handle);
}
/*
* Note that it is NOT sensible to run this program from inetd - the
* protocol assumes that it will run immediately at boot time.
*/
if (daemon(0, debug_level > 0)) {
err(1, "cannot fork");
/* NOTREACHED */
}
openlog("rpc.lockd", 0, LOG_DAEMON);
if (debug_level)
syslog(LOG_INFO, "Starting, debug level %d", debug_level);
else
syslog(LOG_INFO, "Starting");
sigalarm.sa_handler = (sig_t) sigalarm_handler;
sigemptyset(&sigalarm.sa_mask);
sigalarm.sa_flags = SA_RESETHAND; /* should only happen once */
sigalarm.sa_flags |= SA_RESTART;
if (sigaction(SIGALRM, &sigalarm, NULL) != 0) {
syslog(LOG_WARNING, "sigaction(SIGALRM) failed: %s",
strerror(errno));
exit(1);
}
if (kernel_lockd) {
client_pid = client_request();
/*
* Create a child process to enter the kernel and then
* wait for RPCs on our local domain socket.
*/
if (!fork())
nlm_syscall(debug_level, grace_period, naddrs, addrs);
else
svc_run();
} else {
grace_expired = 0;
alarm(grace_period);
init_nsm();
client_pid = client_request();
svc_run(); /* Should never return */
}
exit(1);
}
/*
* This routine creates and binds sockets on the appropriate
* addresses. It gets called one time for each transport and
* registrates the service with rpcbind on that trasport.
*/
void
create_service(struct netconfig *nconf)
{
struct addrinfo hints, *res = NULL;
struct sockaddr_in *sin;
struct sockaddr_in6 *sin6;
struct __rpc_sockinfo si;
struct netbuf servaddr;
SVCXPRT *transp = NULL;
int aicode;
int fd;
int nhostsbak;
int r;
int registered = 0;
u_int32_t host_addr[4]; /* IPv4 or IPv6 */
if ((nconf->nc_semantics != NC_TPI_CLTS) &&
(nconf->nc_semantics != NC_TPI_COTS) &&
(nconf->nc_semantics != NC_TPI_COTS_ORD))
return; /* not my type */
/*
* XXX - using RPC library internal functions.
*/
if (!__rpc_nconf2sockinfo(nconf, &si)) {
syslog(LOG_ERR, "cannot get information for %s",
nconf->nc_netid);
return;
}
/* Get rpc.statd's address on this transport */
memset(&hints, 0, sizeof hints);
hints.ai_flags = AI_PASSIVE;
hints.ai_family = si.si_af;
hints.ai_socktype = si.si_socktype;
hints.ai_protocol = si.si_proto;
/*
* Bind to specific IPs if asked to
*/
nhostsbak = nhosts;
while (nhostsbak > 0) {
--nhostsbak;
/*
* XXX - using RPC library internal functions.
*/
if ((fd = __rpc_nconf2fd(nconf)) < 0) {
syslog(LOG_ERR, "cannot create socket for %s",
nconf->nc_netid);
continue;
}
switch (hints.ai_family) {
case AF_INET:
if (inet_pton(AF_INET, hosts[nhostsbak],
host_addr) == 1) {
hints.ai_flags &= AI_NUMERICHOST;
} else {
/*
* Skip if we have an AF_INET6 address.
*/
if (inet_pton(AF_INET6, hosts[nhostsbak],
host_addr) == 1) {
close(fd);
continue;
}
}
break;
case AF_INET6:
if (inet_pton(AF_INET6, hosts[nhostsbak],
host_addr) == 1) {
hints.ai_flags &= AI_NUMERICHOST;
} else {
/*
* Skip if we have an AF_INET address.
*/
if (inet_pton(AF_INET, hosts[nhostsbak],
host_addr) == 1) {
close(fd);
continue;
}
}
break;
default:
break;
}
/*
* If no hosts were specified, just bind to INADDR_ANY
*/
if (strcmp("*", hosts[nhostsbak]) == 0) {
if (svcport_str == NULL) {
res = malloc(sizeof(struct addrinfo));
if (res == NULL)
out_of_mem();
res->ai_flags = hints.ai_flags;
res->ai_family = hints.ai_family;
res->ai_protocol = hints.ai_protocol;
switch (res->ai_family) {
case AF_INET:
sin = malloc(sizeof(struct sockaddr_in));
if (sin == NULL)
out_of_mem();
sin->sin_family = AF_INET;
sin->sin_port = htons(0);
sin->sin_addr.s_addr = htonl(INADDR_ANY);
res->ai_addr = (struct sockaddr*) sin;
res->ai_addrlen = (socklen_t)
sizeof(res->ai_addr);
break;
case AF_INET6:
sin6 = malloc(sizeof(struct sockaddr_in6));
if (sin6 == NULL)
out_of_mem();
sin6->sin6_family = AF_INET6;
sin6->sin6_port = htons(0);
sin6->sin6_addr = in6addr_any;
res->ai_addr = (struct sockaddr*) sin6;
res->ai_addrlen = (socklen_t) sizeof(res->ai_addr);
break;
default:
break;
}
} else {
if ((aicode = getaddrinfo(NULL, svcport_str,
&hints, &res)) != 0) {
syslog(LOG_ERR,
"cannot get local address for %s: %s",
nconf->nc_netid,
gai_strerror(aicode));
continue;
}
}
} else {
if ((aicode = getaddrinfo(hosts[nhostsbak], svcport_str,
&hints, &res)) != 0) {
syslog(LOG_ERR,
"cannot get local address for %s: %s",
nconf->nc_netid, gai_strerror(aicode));
continue;
}
}
r = bindresvport_sa(fd, res->ai_addr);
if (r != 0) {
syslog(LOG_ERR, "bindresvport_sa: %m");
exit(1);
}
if (nconf->nc_semantics != NC_TPI_CLTS)
listen(fd, SOMAXCONN);
transp = svc_tli_create(fd, nconf, NULL,
RPC_MAXDATASIZE, RPC_MAXDATASIZE);
if (transp != (SVCXPRT *) NULL) {
if (!svc_reg(transp, NLM_PROG, NLM_SM, nlm_prog_0,
NULL))
syslog(LOG_ERR,
"can't register %s NLM_PROG, NLM_SM service",
nconf->nc_netid);
if (!svc_reg(transp, NLM_PROG, NLM_VERS, nlm_prog_1,
NULL))
syslog(LOG_ERR,
"can't register %s NLM_PROG, NLM_VERS service",
nconf->nc_netid);
if (!svc_reg(transp, NLM_PROG, NLM_VERSX, nlm_prog_3,
NULL))
syslog(LOG_ERR,
"can't register %s NLM_PROG, NLM_VERSX service",
nconf->nc_netid);
if (!svc_reg(transp, NLM_PROG, NLM_VERS4, nlm_prog_4,
NULL))
syslog(LOG_ERR,
"can't register %s NLM_PROG, NLM_VERS4 service",
nconf->nc_netid);
} else
syslog(LOG_WARNING, "can't create %s services",
nconf->nc_netid);
if (registered == 0) {
registered = 1;
memset(&hints, 0, sizeof hints);
hints.ai_flags = AI_PASSIVE;
hints.ai_family = si.si_af;
hints.ai_socktype = si.si_socktype;
hints.ai_protocol = si.si_proto;
if (svcport_str == NULL) {
svcport_str = malloc(NI_MAXSERV * sizeof(char));
if (svcport_str == NULL)
out_of_mem();
if (getnameinfo(res->ai_addr,
res->ai_addr->sa_len, NULL, NI_MAXHOST,
svcport_str, NI_MAXSERV * sizeof(char),
NI_NUMERICHOST | NI_NUMERICSERV))
errx(1, "Cannot get port number");
}
if((aicode = getaddrinfo(NULL, svcport_str, &hints,
&res)) != 0) {
syslog(LOG_ERR, "cannot get local address: %s",
gai_strerror(aicode));
exit(1);
}
servaddr.buf = malloc(res->ai_addrlen);
memcpy(servaddr.buf, res->ai_addr, res->ai_addrlen);
servaddr.len = res->ai_addrlen;
rpcb_set(NLM_PROG, NLM_SM, nconf, &servaddr);
rpcb_set(NLM_PROG, NLM_VERS, nconf, &servaddr);
rpcb_set(NLM_PROG, NLM_VERSX, nconf, &servaddr);
rpcb_set(NLM_PROG, NLM_VERS4, nconf, &servaddr);
xcreated++;
freeaddrinfo(res);
}
} /* end while */
}
/*
* Look up addresses for the kernel to create transports for.
*/
void
lookup_addresses(struct netconfig *nconf)
{
struct addrinfo hints, *res = NULL;
struct sockaddr_in *sin;
struct sockaddr_in6 *sin6;
struct __rpc_sockinfo si;
struct netbuf servaddr;
SVCXPRT *transp = NULL;
int aicode;
int nhostsbak;
int r;
int registered = 0;
u_int32_t host_addr[4]; /* IPv4 or IPv6 */
char *uaddr;
if ((nconf->nc_semantics != NC_TPI_CLTS) &&
(nconf->nc_semantics != NC_TPI_COTS) &&
(nconf->nc_semantics != NC_TPI_COTS_ORD))
return; /* not my type */
/*
* XXX - using RPC library internal functions.
*/
if (!__rpc_nconf2sockinfo(nconf, &si)) {
syslog(LOG_ERR, "cannot get information for %s",
nconf->nc_netid);
return;
}
/* Get rpc.statd's address on this transport */
memset(&hints, 0, sizeof hints);
hints.ai_flags = AI_PASSIVE;
hints.ai_family = si.si_af;
hints.ai_socktype = si.si_socktype;
hints.ai_protocol = si.si_proto;
/*
* Bind to specific IPs if asked to
*/
nhostsbak = nhosts;
while (nhostsbak > 0) {
--nhostsbak;
switch (hints.ai_family) {
case AF_INET:
if (inet_pton(AF_INET, hosts[nhostsbak],
host_addr) == 1) {
hints.ai_flags &= AI_NUMERICHOST;
} else {
/*
* Skip if we have an AF_INET6 address.
*/
if (inet_pton(AF_INET6, hosts[nhostsbak],
host_addr) == 1) {
continue;
}
}
break;
case AF_INET6:
if (inet_pton(AF_INET6, hosts[nhostsbak],
host_addr) == 1) {
hints.ai_flags &= AI_NUMERICHOST;
} else {
/*
* Skip if we have an AF_INET address.
*/
if (inet_pton(AF_INET, hosts[nhostsbak],
host_addr) == 1) {
continue;
}
}
break;
default:
break;
}
/*
* If no hosts were specified, just bind to INADDR_ANY
*/
if (strcmp("*", hosts[nhostsbak]) == 0) {
if (svcport_str == NULL) {
res = malloc(sizeof(struct addrinfo));
if (res == NULL)
out_of_mem();
res->ai_flags = hints.ai_flags;
res->ai_family = hints.ai_family;
res->ai_protocol = hints.ai_protocol;
switch (res->ai_family) {
case AF_INET:
sin = malloc(sizeof(struct sockaddr_in));
if (sin == NULL)
out_of_mem();
sin->sin_family = AF_INET;
sin->sin_port = htons(0);
sin->sin_addr.s_addr = htonl(INADDR_ANY);
res->ai_addr = (struct sockaddr*) sin;
res->ai_addrlen = (socklen_t)
sizeof(res->ai_addr);
break;
case AF_INET6:
sin6 = malloc(sizeof(struct sockaddr_in6));
if (sin6 == NULL)
out_of_mem();
sin6->sin6_family = AF_INET6;
sin6->sin6_port = htons(0);
sin6->sin6_addr = in6addr_any;
res->ai_addr = (struct sockaddr*) sin6;
res->ai_addrlen = (socklen_t) sizeof(res->ai_addr);
break;
default:
break;
}
} else {
if ((aicode = getaddrinfo(NULL, svcport_str,
&hints, &res)) != 0) {
syslog(LOG_ERR,
"cannot get local address for %s: %s",
nconf->nc_netid,
gai_strerror(aicode));
continue;
}
}
} else {
if ((aicode = getaddrinfo(hosts[nhostsbak], svcport_str,
&hints, &res)) != 0) {
syslog(LOG_ERR,
"cannot get local address for %s: %s",
nconf->nc_netid, gai_strerror(aicode));
continue;
}
}
servaddr.len = servaddr.maxlen = res->ai_addr->sa_len;
servaddr.buf = res->ai_addr;
uaddr = taddr2uaddr(nconf, &servaddr);
addrs = realloc(addrs, 2 * (naddrs + 1) * sizeof(char *));
if (!addrs)
out_of_mem();
addrs[2 * naddrs] = strdup(nconf->nc_netid);
addrs[2 * naddrs + 1] = uaddr;
naddrs++;
} /* end while */
}
void
sigalarm_handler(void)
{
grace_expired = 1;
}
void
usage()
{
errx(1, "usage: rpc.lockd [-d <debuglevel>]"
" [-g <grace period>] [-h <bindip>] [-p <port>]");
}
/*
* init_nsm --
* Reset the NSM state-of-the-world and acquire its state.
*/
void
init_nsm(void)
{
enum clnt_stat ret;
my_id id;
sm_stat stat;
char name[] = "NFS NLM";
char localhost[] = "localhost";
/*
* !!!
* The my_id structure isn't used by the SM_UNMON_ALL call, as far
* as I know. Leave it empty for now.
*/
memset(&id, 0, sizeof(id));
id.my_name = name;
/*
* !!!
* The statd program must already be registered when lockd runs.
*/
do {
ret = callrpc("localhost", SM_PROG, SM_VERS, SM_UNMON_ALL,
(xdrproc_t)xdr_my_id, &id, (xdrproc_t)xdr_sm_stat, &stat);
if (ret == RPC_PROGUNAVAIL) {
syslog(LOG_WARNING, "%lu %s", SM_PROG,
clnt_sperrno(ret));
sleep(2);
continue;
}
break;
} while (0);
if (ret != 0) {
syslog(LOG_ERR, "%lu %s", SM_PROG, clnt_sperrno(ret));
exit(1);
}
nsm_state = stat.state;
/* setup constant data for SM_MON calls */
mon_host.mon_id.my_id.my_name = localhost;
mon_host.mon_id.my_id.my_prog = NLM_PROG;
mon_host.mon_id.my_id.my_vers = NLM_SM;
mon_host.mon_id.my_id.my_proc = NLM_SM_NOTIFY; /* bsdi addition */
}
/*
* Out of memory, fatal
*/
void out_of_mem()
{
syslog(LOG_ERR, "out of memory");
exit(2);
}
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