NetBSD/dist/bind/lib/irs/nis_pw.c

285 lines
6.5 KiB
C

/* $NetBSD: nis_pw.c,v 1.1.1.1 1999/11/20 18:54:10 veego Exp $ */
/*
* 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: nis_pw.c,v 1.16 1999/01/30 00:53:16 vixie Exp";
#endif /* LIBC_SCCS and not lint */
/* Imports */
#include "port_before.h"
#if !defined(WANT_IRS_PW) || !defined(WANT_IRS_NIS)
static int __bind_irs_pw_unneeded;
#else
#include <sys/param.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <arpa/nameser.h>
#include <resolv.h>
#include <isc/memcluster.h>
#include <rpc/rpc.h>
#include <rpc/xdr.h>
#include <rpcsvc/yp_prot.h>
#include <rpcsvc/ypclnt.h>
#include <errno.h>
#include <fcntl.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <isc/memcluster.h>
#include <irs.h>
#include "port_after.h"
#include "irs_p.h"
#include "nis_p.h"
/* Definitions */
struct pvt {
int needrewind;
char * nis_domain;
char * curkey_data;
int curkey_len;
char * curval_data;
int curval_len;
struct passwd passwd;
char * pwbuf;
};
enum do_what { do_none = 0x0, do_key = 0x1, do_val = 0x2, do_all = 0x3 };
static /*const*/ char passwd_byname[] = "passwd.byname";
static /*const*/ char passwd_byuid[] = "passwd.byuid";
/* Forward */
static void pw_close(struct irs_pw *);
static struct passwd * pw_next(struct irs_pw *);
static struct passwd * pw_byname(struct irs_pw *, const char *);
static struct passwd * pw_byuid(struct irs_pw *, uid_t);
static void pw_rewind(struct irs_pw *);
static void pw_minimize(struct irs_pw *);
static struct passwd * makepasswdent(struct irs_pw *);
static void nisfree(struct pvt *, enum do_what);
/* Public */
struct irs_pw *
irs_nis_pw(struct irs_acc *this) {
struct irs_pw *pw;
struct pvt *pvt;
if (!(pw = memget(sizeof *pw))) {
errno = ENOMEM;
return (NULL);
}
memset(pw, 0x5e, sizeof *pw);
if (!(pvt = memget(sizeof *pvt))) {
memput(pw, sizeof *pw);
errno = ENOMEM;
return (NULL);
}
memset(pvt, 0, sizeof *pvt);
pvt->needrewind = 1;
pvt->nis_domain = ((struct nis_p *)this->private)->domain;
pw->private = pvt;
pw->close = pw_close;
pw->next = pw_next;
pw->byname = pw_byname;
pw->byuid = pw_byuid;
pw->rewind = pw_rewind;
pw->minimize = pw_minimize;
pw->res_get = NULL;
pw->res_set = NULL;
return (pw);
}
/* Methods */
static void
pw_close(struct irs_pw *this) {
struct pvt *pvt = (struct pvt *)this->private;
if (pvt->pwbuf)
free(pvt->pwbuf);
nisfree(pvt, do_all);
memput(pvt, sizeof *pvt);
memput(this, sizeof *this);
}
static struct passwd *
pw_next(struct irs_pw *this) {
struct pvt *pvt = (struct pvt *)this->private;
struct passwd *rval;
int r;
do {
if (pvt->needrewind) {
nisfree(pvt, do_all);
r = yp_first(pvt->nis_domain, passwd_byname,
&pvt->curkey_data, &pvt->curkey_len,
&pvt->curval_data, &pvt->curval_len);
pvt->needrewind = 0;
} else {
char *newkey_data;
int newkey_len;
nisfree(pvt, do_val);
r = yp_next(pvt->nis_domain, passwd_byname,
pvt->curkey_data, pvt->curkey_len,
&newkey_data, &newkey_len,
&pvt->curval_data, &pvt->curval_len);
nisfree(pvt, do_key);
pvt->curkey_data = newkey_data;
pvt->curkey_len = newkey_len;
}
if (r != 0) {
errno = ENOENT;
return (NULL);
}
rval = makepasswdent(this);
} while (rval == NULL);
return (rval);
}
static struct passwd *
pw_byname(struct irs_pw *this, const char *name) {
struct pvt *pvt = (struct pvt *)this->private;
int r;
nisfree(pvt, do_val);
r = yp_match(pvt->nis_domain, passwd_byname, name, strlen(name),
&pvt->curval_data, &pvt->curval_len);
if (r != 0) {
errno = ENOENT;
return (NULL);
}
return (makepasswdent(this));
}
static struct passwd *
pw_byuid(struct irs_pw *this, uid_t uid) {
struct pvt *pvt = (struct pvt *)this->private;
char tmp[sizeof "4294967295"];
int r;
nisfree(pvt, do_val);
(void) sprintf(tmp, "%u", (unsigned int)uid);
r = yp_match(pvt->nis_domain, passwd_byuid, tmp, strlen(tmp),
&pvt->curval_data, &pvt->curval_len);
if (r != 0) {
errno = ENOENT;
return (NULL);
}
return (makepasswdent(this));
}
static void
pw_rewind(struct irs_pw *this) {
struct pvt *pvt = (struct pvt *)this->private;
pvt->needrewind = 1;
}
static void
pw_minimize(struct irs_pw *this) {
/* NOOP */
}
/* Private */
static struct passwd *
makepasswdent(struct irs_pw *this) {
struct pvt *pvt = (struct pvt *)this->private;
char *cp;
memset(&pvt->passwd, 0, sizeof pvt->passwd);
if (pvt->pwbuf)
free(pvt->pwbuf);
pvt->pwbuf = pvt->curval_data;
pvt->curval_data = NULL;
cp = pvt->pwbuf;
pvt->passwd.pw_name = cp;
if (!(cp = strchr(cp, ':')))
goto cleanup;
pvt->passwd.pw_class = cp; /* Needs to point at a \0. */
*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;
if ((cp = strchr(cp, '\n')) != NULL)
*cp = '\0';
return (&pvt->passwd);
cleanup:
free(pvt->pwbuf);
pvt->pwbuf = NULL;
return (NULL);
}
static void
nisfree(struct pvt *pvt, enum do_what do_what) {
if ((do_what & do_key) && pvt->curkey_data) {
free(pvt->curkey_data);
pvt->curkey_data = NULL;
}
if ((do_what & do_val) && pvt->curval_data) {
free(pvt->curval_data);
pvt->curval_data = NULL;
}
}
#endif /* WANT_IRS_PW && WANT_IRS_NIS */