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/*
* Copyright (c) 1996,1999 by Internet Software Consortium.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
* ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
* CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
* ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
* SOFTWARE.
*/
#if defined(LIBC_SCCS) && !defined(lint)
static const char rcsid[] = "$Id: dns_pw.c,v 1.19 2001/05/29 05:48:32 marka Exp $";
#endif
#include "port_before.h"
#ifndef WANT_IRS_PW
static int __bind_irs_pw_unneeded;
#else
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <arpa/nameser.h>
#include <resolv.h>
#include <isc/memcluster.h>
#include <irs.h>
#include "port_after.h"
#include "irs_p.h"
#include "hesiod.h"
#include "dns_p.h"
/* Types. */
struct pvt {
struct dns_p * dns;
struct passwd passwd;
char * pwbuf;
};
/* Forward. */
static void pw_close(struct irs_pw *);
static struct passwd * pw_byname(struct irs_pw *, const char *);
static struct passwd * pw_byuid(struct irs_pw *, uid_t);
static struct passwd * pw_next(struct irs_pw *);
static void pw_rewind(struct irs_pw *);
static void pw_minimize(struct irs_pw *);
static struct __res_state * pw_res_get(struct irs_pw *);
static void pw_res_set(struct irs_pw *,
struct __res_state *,
void (*)(void *));
static struct passwd * getpwcommon(struct irs_pw *, const char *,
const char *);
/* Public. */
struct irs_pw *
irs_dns_pw(struct irs_acc *this) {
struct dns_p *dns = (struct dns_p *)this->private;
struct irs_pw *pw;
struct pvt *pvt;
if (!dns || !dns->hes_ctx) {
errno = ENODEV;
return (NULL);
}
if (!(pvt = memget(sizeof *pvt))) {
errno = ENOMEM;
return (NULL);
}
memset(pvt, 0, sizeof *pvt);
pvt->dns = dns;
if (!(pw = memget(sizeof *pw))) {
memput(pvt, sizeof *pvt);
errno = ENOMEM;
return (NULL);
}
memset(pw, 0x5e, sizeof *pw);
pw->private = pvt;
pw->close = pw_close;
pw->byname = pw_byname;
pw->byuid = pw_byuid;
pw->next = pw_next;
pw->rewind = pw_rewind;
pw->minimize = pw_minimize;
pw->res_get = pw_res_get;
pw->res_set = pw_res_set;
return (pw);
}
/* Methods. */
static void
pw_close(struct irs_pw *this) {
struct pvt *pvt = (struct pvt *)this->private;
if (pvt->pwbuf)
free(pvt->pwbuf);
memput(pvt, sizeof *pvt);
memput(this, sizeof *this);
}
static struct passwd *
pw_byname(struct irs_pw *this, const char *nam) {
return (getpwcommon(this, nam, "passwd"));
}
static struct passwd *
pw_byuid(struct irs_pw *this, uid_t uid) {
char uidstr[16];
sprintf(uidstr, "%lu", (u_long)uid);
return (getpwcommon(this, uidstr, "uid"));
}
static struct passwd *
pw_next(struct irs_pw *this) {
UNUSED(this);
errno = ENODEV;
return (NULL);
}
static void
pw_rewind(struct irs_pw *this) {
UNUSED(this);
/* NOOP */
}
static void
pw_minimize(struct irs_pw *this) {
UNUSED(this);
/* NOOP */
}
static struct __res_state *
pw_res_get(struct irs_pw *this) {
struct pvt *pvt = (struct pvt *)this->private;
struct dns_p *dns = pvt->dns;
return (__hesiod_res_get(dns->hes_ctx));
}
static void
pw_res_set(struct irs_pw *this, struct __res_state * res,
void (*free_res)(void *)) {
struct pvt *pvt = (struct pvt *)this->private;
struct dns_p *dns = pvt->dns;
__hesiod_res_set(dns->hes_ctx, res, free_res);
}
/* Private. */
static struct passwd *
getpwcommon(struct irs_pw *this, const char *arg, const char *type) {
struct pvt *pvt = (struct pvt *)this->private;
char **hes_list, *cp;
if (!(hes_list = hesiod_resolve(pvt->dns->hes_ctx, arg, type)))
return (NULL);
if (!*hes_list) {
hesiod_free_list(pvt->dns->hes_ctx, hes_list);
errno = ENOENT;
return (NULL);
}
memset(&pvt->passwd, 0, sizeof pvt->passwd);
if (pvt->pwbuf)
free(pvt->pwbuf);
pvt->pwbuf = strdup(*hes_list);
hesiod_free_list(pvt->dns->hes_ctx, hes_list);
cp = pvt->pwbuf;
pvt->passwd.pw_name = cp;
if (!(cp = strchr(cp, ':')))
goto cleanup;
*cp++ = '\0';
pvt->passwd.pw_passwd = cp;
if (!(cp = strchr(cp, ':')))
goto cleanup;
*cp++ = '\0';
pvt->passwd.pw_uid = atoi(cp);
if (!(cp = strchr(cp, ':')))
goto cleanup;
*cp++ = '\0';
pvt->passwd.pw_gid = atoi(cp);
if (!(cp = strchr(cp, ':')))
goto cleanup;
*cp++ = '\0';
pvt->passwd.pw_gecos = cp;
if (!(cp = strchr(cp, ':')))
goto cleanup;
*cp++ = '\0';
pvt->passwd.pw_dir = cp;
if (!(cp = strchr(cp, ':')))
goto cleanup;
*cp++ = '\0';
pvt->passwd.pw_shell = cp;
return (&pvt->passwd);
cleanup:
free(pvt->pwbuf);
pvt->pwbuf = NULL;
return (NULL);
}
#endif /* WANT_IRS_PW */
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