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/*
* rquotad Authenticate rquota requests and retrieve file handle.
*
* Copyright (C) 1995 Olaf Kirch <okir@monad.swb.de>
*/
#include <signal.h>
#include <sys/stat.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/vfs.h>
#include <stdio.h>
#include <paths.h>
#include <mntent.h>
#include "rquotad.h"
#include "logging.h"
#include "rpcmisc.h"
#ifndef _PATH_MTAB
#define _PATH_MTAB "/etc/mtab"
#endif
#ifdef HAVE_QUOTACTL
static char * getdevice(char *path);
#endif
static void usage(int exitcode);
static struct option longopts[] =
{
{ "foreground", 0, 0, 'F' },
{ "debug", 1, 0, 'd' },
{ "help", 0, 0, 'h' },
{ "version", 0, 0, 'v' },
{ NULL, 0, 0, 0 }
};
bool_t
rquota_null_1_svc(struct svc_req *rqstp, void *argp, void *resp)
{
return 1;
}
#ifdef HAVE_QUOTACTL
bool_t
rquota_getquota_1_svc(struct svc_req *rqstp, getquota_args *argp,
getquota_rslt *resp)
{
struct sockaddr_in *sin = svc_getcaller(rqstp->rq_xprt);
char *special;
struct dqblk qtinfo;
struct statfs fsinfo;
struct rquota rqot;
uid_t uid = (uid_t) argp->gqa_uid;
/* The rquota.x file suggests that AUTH_UNIX be required;
* but since UNIX credentials can't be trusted much anyway,
* we use simple port checking.
*/
if (ntohs(sin->sin_port) >= IPPORT_RESERVED) {
resp->status = Q_EPERM;
return 1;
}
resp->status = Q_NOQUOTA;
if (!(special = getdevice(argp->gqa_pathp)))
return 1;
if (statfs(argp->gqa_pathp, &fsinfo) < 0
|| quotactl(QCMD(Q_GETQUOTA, USRQUOTA), special, uid, &qtinfo) < 0)
return 1;
rqot = &resp->getquota_rslt_u.gqr_rquota;
rqot->status = Q_OK;
rqot->rq_bsize = fsinfo.f_bsize;
rqot->rq_active = 1; /* always active */
rqot->rq_bhardlimit = qtinfo.dqb_bhardlimit;
rqot->rq_bsoftlimit = qtinfo.dqb_bsoftlimit;
rqot->rq_curblocks = qtinfo.dqb_curblocks;
rqot->rq_fhardlimit = qtinfo.dqb_fhardlimit;
rqot->rq_fsoftlimit = qtinfo.dqb_fsoftlimit;
rqot->rq_curfiles = qtinfo.dqb_curfiles;
rqot->rq_btimeleft = qtinfo.dqb_btimeleft;
rqot->rq_ftimeleft = qtinfo.dqb_ftimeleft;
return 1;
}
#else
bool_t
rquota_getquota_1_svc(struct svc_req *rqstp, getquota_args *argp,
getquota_rslt *resp)
{
resp->status = Q_NOQUOTA;
return 1;
}
#endif
bool_t
rquota_getactivequota_1_svc(struct svc_req *rqstp, getquota_args *argp,
getquota_rslt *resp)
{
/* What's the difference between these two? */
return rquota_getquota_1_svc(rqstp, argp, resp);
}
int
main(int argc, char **argv)
{
int foreground = 0;
int c;
rpc_init("rquotad", RQUOTAPROG, RQUOTAVERS, rquota_dispatch, 0, 0);
/* Parse the command line options and arguments. */
opterr = 0;
while ((c = getopt_long(argc, argv, "Fd:hv", longopts, NULL)) != EOF) {
switch (c) {
case 'F':
foreground = 1;
break;
case 'd':
enable_logging(optarg);
break;
case 'h':
usage(0);
break;
case 'v':
printf("rquotad %s\n", VERSION);
exit(0);
case 0:
break;
case '?':
default:
usage(1);
}
}
/* No more arguments allowed. */
if (optind != argc)
usage(1);
if (!foreground) {
/* We first fork off a child. */
if ((c = fork()) > 0)
exit(0);
if (c < 0) {
Dprintf(L_FATAL, "rquotad: cannot fork: %s\n",
strerror(errno));
}
/* Now we remove ourselves from the foreground. */
close(0);
close(1);
close(2);
setsid();
}
/* Initialize logging. */
log_open("rquotad", foreground);
svc_run();
Dprintf(L_ERROR, "Ack! Gack! svc_run returned!\n");
exit(1);
}
#ifdef HAVE_QUOTACTL
static char *
getdevice(char *path)
{
static char special[PATH_MAX];
struct mntent *mnt;
FILE *fp;
int mlen, plen;
if (!(fp = setmntent(_PATH_MTAB, "r")))
return NULL;
special[0] = '\0';
mlen = 0;
while ((mnt = getmntent(fp)) != NULL) {
plen = strlen(mnt->mnt_dir);
if (!strncmp(mnt->mnt_dir, path, plen) && plen > mlen) {
strcpy(special, mnt->mnt_dir);
mlen = plen;
}
if (path[plen] == '\0')
break;
}
endmntent(fp);
return mlen? special : NULL;
}
#endif
static void
usage(int n)
{
fprintf(stderr,
"Usage: rpc.rquotad [-Fhnpv] [-d kind]\n"
" [--debug kind] [--help] [--version]\n");
exit(n);
}
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