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/*
* yppasswdd
* Copyright 1994 Olaf Kirch, <okir@monad.swb.de>
*
* This program is covered by the GNU General Public License, version 2.
* It is provided in the hope that it is useful. However, the author
* disclaims ALL WARRANTIES, expressed or implied. See the GPL for details.
*/
#include <sys/types.h>
#include <sys/errno.h>
#include <sys/ioctl.h>
#include <sys/wait.h>
#include <termios.h>
#include <signal.h>
#include <unistd.h>
#include <fcntl.h>
#include <stdlib.h>
#include <syslog.h>
#include <stdio.h>
#include <string.h>
#include <pwd.h>
#include <rpc/rpc.h>
#include <rpc/pmap_clnt.h>
#include "yppasswd.h"
extern char *optarg;
extern void pw_init __P((void));
static char *program_name = "";
static char *version = "yppsswdd " VERSION;
char *passfile = _PATH_MASTERPASSWD;
int allow_chfn = 0, allow_chsh = 0;
#define xprt_addr(xprt) (svc_getcaller(xprt)->sin_addr)
#define xprt_port(xprt) ntohs(svc_getcaller(xprt)->sin_port)
void yppasswdprog_1( struct svc_req *rqstp, SVCXPRT *transp );
void reaper( int sig );
/*==============================================================*
* RPC dispatch function
*==============================================================*/
void
yppasswdprog_1(struct svc_req *rqstp, SVCXPRT *transp)
{
union {
yppasswd yppasswdproc_update_1_arg;
} argument;
char *result;
xdrproc_t xdr_argument, xdr_result;
char *(*local)();
switch (rqstp->rq_proc) {
case NULLPROC:
(void)svc_sendreply(transp, (xdrproc_t)xdr_void, (char *)NULL);
return;
case YPPASSWDPROC_UPDATE:
xdr_argument = (xdrproc_t) xdr_yppasswd;
xdr_result = (xdrproc_t) xdr_int;
local = (char *(*)()) yppasswdproc_pwupdate_1;
break;
default:
svcerr_noproc(transp);
return;
}
bzero((char *)&argument, sizeof(argument));
if (!svc_getargs(transp, xdr_argument, &argument)) {
svcerr_decode(transp);
return;
}
result = (*local)(&argument, rqstp);
if (result != NULL
&& !svc_sendreply(transp, (xdrproc_t)xdr_result, result)) {
svcerr_systemerr(transp);
}
if (!svc_freeargs(transp, xdr_argument, &argument)) {
(void)fprintf(stderr, "unable to free arguments\n");
exit(1);
}
}
static void
usage(FILE *fp, int n)
{
fprintf (fp, "usage: %s [-m master password file] [-f] [-s] [-h] [-v]\n", program_name );
exit(n);
}
void
reaper( int sig )
{
extern pid_t pid;
extern int pstat;
pid = waitpid(pid, &pstat, 0);
}
void
install_reaper( int on )
{
struct sigaction act, oact;
if (on) {
act.sa_handler = reaper;
sigemptyset(&act.sa_mask);
act.sa_flags = SA_RESTART;
} else {
act.sa_handler = SIG_DFL;
sigemptyset(&act.sa_mask);
act.sa_flags = SA_RESTART;
}
sigaction( SIGCHLD, &act, &oact );
}
int
main(int argc, char **argv)
{
SVCXPRT *transp;
char *sp;
int opterr;
int c;
program_name = argv[0];
if ((sp = strrchr(program_name, '/')) != NULL) {
program_name = ++sp;
}
/* Parse the command line options and arguments. */
opterr = 0;
while ((c = getopt(argc, argv, "m:fshv")) != EOF)
switch (c) {
case 'm':
passfile = strdup(optarg);
break;
case 'f':
allow_chfn = 1;
break;
case 's':
allow_chsh = 1;
break;
case 'h':
usage (stdout, 0);
break;
case 'v':
printf("%s\n", version);
exit(0);
case 0:
break;
case '?':
default:
usage(stderr, 1);
}
if (daemon(0,0)) {
perror("fork");
exit(1);
}
/*
* We can call this here since it does some necessary setup
* for us (blocking signals, setting resourse limits, etc.
*/
pw_init();
/* Initialize logging.
*/
openlog ( "yppasswdd", LOG_PID, LOG_AUTH );
/* Register a signal handler to reap children after they terminated
*/
install_reaper(1);
/*
* Create the RPC server
*/
(void)pmap_unset(YPPASSWDPROG, YPPASSWDVERS);
transp = svcudp_create(RPC_ANYSOCK);
if (transp == NULL) {
(void)fprintf(stderr, "cannot create udp service.\n");
exit(1);
}
if (!svc_register(transp, YPPASSWDPROG, YPPASSWDVERS, yppasswdprog_1,
IPPROTO_UDP)) {
(void)fprintf(stderr, "unable to register yppaswdd udp service.\n");
exit(1);
}
/*
* Run the server
*/
svc_run();
(void)fprintf(stderr, "svc_run returned\n");
return 1;
}
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