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getpwent.c revision 1.1.1.1.14.1 
      1 /*	$NetBSD: getpwent.c,v 1.1.1.1.14.1 2012/10/30 18:55:27 yamt Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
      5  * Copyright (c) 1996,1999 by Internet Software Consortium.
      6  *
      7  * Permission to use, copy, modify, and distribute this software for any
      8  * purpose with or without fee is hereby granted, provided that the above
      9  * copyright notice and this permission notice appear in all copies.
     10  *
     11  * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
     12  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
     13  * MERCHANTABILITY AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR
     14  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
     15  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
     16  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
     17  * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
     18  */
     19 
     20 #if !defined(LINT) && !defined(CODECENTER)
     21 static const char rcsid[] = "Id: getpwent.c,v 1.3 2005/04/27 04:56:26 sra Exp ";
     22 #endif
     23 
     24 /* Imports */
     25 
     26 #include "port_before.h"
     27 
     28 #if !defined(WANT_IRS_PW) || defined(__BIND_NOSTATIC)
     29 static int __bind_irs_pw_unneeded;
     30 #else
     31 
     32 #include <sys/types.h>
     33 
     34 #include <netinet/in.h>
     35 #include <arpa/nameser.h>
     36 
     37 #include <errno.h>
     38 #include <pwd.h>
     39 #include <resolv.h>
     40 #include <stdio.h>
     41 #include <string.h>
     42 
     43 #include <irs.h>
     44 
     45 #include "port_after.h"
     46 
     47 #include "irs_data.h"
     48 
     49 /* Forward */
     50 
     51 static struct net_data * init(void);
     52 
     53 /* Public */
     54 
     55 struct passwd *
     56 getpwent(void) {
     57 	struct net_data *net_data = init();
     58 
     59 	return (getpwent_p(net_data));
     60 }
     61 
     62 struct passwd *
     63 getpwnam(const char *name) {
     64 	struct net_data *net_data = init();
     65 
     66 	return (getpwnam_p(name, net_data));
     67 }
     68 
     69 struct passwd *
     70 getpwuid(uid_t uid) {
     71 	struct net_data *net_data = init();
     72 
     73 	return (getpwuid_p(uid, net_data));
     74 }
     75 
     76 int
     77 setpassent(int stayopen) {
     78 	struct net_data *net_data = init();
     79 
     80 	return (setpassent_p(stayopen, net_data));
     81 }
     82 
     83 #ifdef SETPWENT_VOID
     84 void
     85 setpwent() {
     86 	struct net_data *net_data = init();
     87 
     88 	setpwent_p(net_data);
     89 }
     90 #else
     91 int
     92 setpwent() {
     93 	struct net_data *net_data = init();
     94 
     95 	return (setpwent_p(net_data));
     96 }
     97 #endif
     98 
     99 void
    100 endpwent() {
    101 	struct net_data *net_data = init();
    102 
    103 	endpwent_p(net_data);
    104 }
    105 
    106 /* Shared private. */
    107 
    108 struct passwd *
    109 getpwent_p(struct net_data *net_data) {
    110 	struct irs_pw *pw;
    111 
    112 	if (!net_data || !(pw = net_data->pw))
    113 		return (NULL);
    114 	net_data->pw_last = (*pw->next)(pw);
    115 	return (net_data->pw_last);
    116 }
    117 
    118 struct passwd *
    119 getpwnam_p(const char *name, struct net_data *net_data) {
    120 	struct irs_pw *pw;
    121 
    122 	if (!net_data || !(pw = net_data->pw))
    123 		return (NULL);
    124 	if (net_data->pw_stayopen && net_data->pw_last &&
    125 	    !strcmp(net_data->pw_last->pw_name, name))
    126 		return (net_data->pw_last);
    127 	net_data->pw_last = (*pw->byname)(pw, name);
    128 	if (!net_data->pw_stayopen)
    129 		endpwent();
    130 	return (net_data->pw_last);
    131 }
    132 
    133 struct passwd *
    134 getpwuid_p(uid_t uid, struct net_data *net_data) {
    135 	struct irs_pw *pw;
    136 
    137 	if (!net_data || !(pw = net_data->pw))
    138 		return (NULL);
    139 	if (net_data->pw_stayopen && net_data->pw_last &&
    140 	    net_data->pw_last->pw_uid == uid)
    141 		return (net_data->pw_last);
    142 	net_data->pw_last = (*pw->byuid)(pw, uid);
    143 	if (!net_data->pw_stayopen)
    144 		endpwent();
    145 	return (net_data->pw_last);
    146 }
    147 
    148 int
    149 setpassent_p(int stayopen, struct net_data *net_data) {
    150 	struct irs_pw *pw;
    151 
    152 	if (!net_data || !(pw = net_data->pw))
    153 		return (0);
    154 	(*pw->rewind)(pw);
    155 	net_data->pw_stayopen = (stayopen != 0);
    156 	if (stayopen == 0)
    157 		net_data_minimize(net_data);
    158 	return (1);
    159 }
    160 
    161 #ifdef SETPWENT_VOID
    162 void
    163 setpwent_p(struct net_data *net_data) {
    164 	(void) setpassent_p(0, net_data);
    165 }
    166 #else
    167 int
    168 setpwent_p(struct net_data *net_data) {
    169 	return (setpassent_p(0, net_data));
    170 }
    171 #endif
    172 
    173 void
    174 endpwent_p(struct net_data *net_data) {
    175 	struct irs_pw *pw;
    176 
    177 	if ((net_data != NULL) && ((pw = net_data->pw) != NULL))
    178 		(*pw->minimize)(pw);
    179 }
    180 
    181 /* Private */
    182 
    183 static struct net_data *
    184 init() {
    185 	struct net_data *net_data;
    186 	if (!(net_data = net_data_init(NULL)))
    187 		goto error;
    188 	if (!net_data->pw) {
    189 		net_data->pw = (*net_data->irs->pw_map)(net_data->irs);
    190 
    191 		if (!net_data->pw || !net_data->res) {
    192  error:
    193 			errno = EIO;
    194 			return (NULL);
    195 		}
    196 		(*net_data->pw->res_set)(net_data->pw, net_data->res, NULL);
    197 	}
    198 
    199 	return (net_data);
    200 }
    201 
    202 #endif /* WANT_IRS_PW */
    203 /*! \file */
    204