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getent(1) - get entries from administrative database.

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lukem 2004-11-23 07:35:06 +00:00
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5
usr.bin/getent/Makefile Normal file
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# $NetBSD: Makefile,v 1.1 2004/11/23 07:35:06 lukem Exp $
PROG= getent
.include <bsd.prog.mk>

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usr.bin/getent/getent.1 Normal file
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.\" $NetBSD: getent.1,v 1.1 2004/11/23 07:35:06 lukem Exp $
.\"
.\" Copyright (c) 2004 The NetBSD Foundation, Inc.
.\" All rights reserved.
.\"
.\" This code is derived from software contributed to The NetBSD Foundation
.\" by Luke Mewburn.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\" notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, this list of conditions and the following disclaimer in the
.\" documentation and/or other materials provided with the distribution.
.\" 3. All advertising materials mentioning features or use of this software
.\" must display the following acknowledgement:
.\" This product includes software developed by the NetBSD
.\" Foundation, Inc. and its contributors.
.\" 4. Neither the name of The NetBSD Foundation nor the names of its
.\" contributors may be used to endorse or promote products derived
.\" from this software without specific prior written permission.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
.\" POSSIBILITY OF SUCH DAMAGE.
.\"
.Dd November 22, 2004
.Dt GETENT 1
.Os
.Sh NAME
.Nm getent
.Nd get entries from administrative database
.Sh SYNOPSIS
.Nm
.Ar database
.Op Ar key \&.\&.\&.
.Sh DESCRIPTION
The
.Nm
program retrieves and displays entries from the administrative
database specified by
.Ar database ,
using the lookup order specified in
.Xr nsswitch.conf 5 .
The display format for a given
.Ar database
is as per the
.Dq traditional
file format for that database.
.Pp
.Ar database
may be one of:
.Bl -column "netgroup" -offset indent -compact
.Sy Database Ta Sy Display format
.It group Ta group:passwd:gid:[member[,member]...]
.It hosts Ta address hostname [alias ...]
.It passwd Ta user:passwd:uid:gid:gecos:home_dir_shell
.It shells Ta /path/to/shell
.El
.Pp
If one more more
.Ar key
arguments are provided, they will be looked up in
.Ar database
using the appropriate function.
For example,
.Sy passwd
supports a numeric UID or user name,
and
.Sy hosts
supports an IPv4 address, IPv6 address, or host name.
.Pp
If no
.Ar key
is provided and
.Ar database
supports enumeration, all entries for
.Ar database
will be retrieved using the appropriate enumeration function and printed.
.Sh DIAGNOSTICS
.Nm
exits 0 on success,
1 if there was an error in the command syntax,
2 if one of the specified entry names was not found in
.Ar database ,
or 3 if there is no support for enumeration on
.Ar database .
.Sh SEE ALSO
.Xr nsswitch.conf 5
.Sh HISTORY
A
.Nm
command appeared in
.Nx 3.0 .

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/* $NetBSD: getent.c,v 1.1 2004/11/23 07:35:06 lukem Exp $ */
/*-
* Copyright (c) 2004 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Luke Mewburn.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#ifndef lint
__RCSID("$NetBSD: getent.c,v 1.1 2004/11/23 07:35:06 lukem Exp $");
#endif /* not lint */
#include <sys/socket.h>
#include <assert.h>
#include <ctype.h>
#include <errno.h>
#include <grp.h>
#include <limits.h>
#include <netdb.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <arpa/inet.h>
#include <arpa/nameser.h>
#include <netinet/in.h> /* for INET6_ADDRSTRLEN */
static int usage(void);
static int parsenum(const char *, unsigned long *);
static int group(int, char *[]);
static int hosts(int, char *[]);
static int passwd(int, char *[]);
static int shells(int, char *[]);
enum {
RV_OK = 0,
RV_USAGE = 1,
RV_NOTFOUND = 2,
RV_NOENUM = 3,
};
int
main(int argc, char *argv[])
{
static struct {
const char *name;
int (*callback)(int, char *[]);
} *curdb, dbs[] = {
{ "group", group, },
{ "hosts", hosts, },
/* networks */
{ "passwd", passwd, },
{ "shells", shells, },
{ NULL, NULL, },
};
setprogname(argv[0]);
if (argc < 2)
usage();
for (curdb = dbs; curdb->name != NULL; curdb++) {
if (strcmp(curdb->name, argv[1]) == 0) {
exit(curdb->callback(argc, argv));
break;
}
}
fprintf(stderr, "Unknown database: %s\n", argv[1]);
usage();
/* NOTREACHED */
return RV_USAGE;
}
static int
usage(void)
{
fprintf(stderr, "Usage: %s database [key ...]\n",
getprogname());
exit(RV_USAGE);
/* NOTREACHED */
}
static int
parsenum(const char *word, unsigned long *result)
{
unsigned long num;
char *ep;
assert(word != NULL);
assert(result != NULL);
if (!isdigit((unsigned char)word[0]))
return 0;
errno = 0;
num = strtoul(word, &ep, 10);
if (num == ULONG_MAX && errno == ERANGE)
return 0;
if (*ep != '\0')
return 0;
*result = num;
return 1;
}
/*
* group
*/
static void
groupprint(const struct group *gr)
{
char prefix;
int i;
assert(gr != NULL);
printf("%s:%s:%u",
gr->gr_name, gr->gr_passwd, gr->gr_gid);
prefix = ':';
for (i = 0; gr->gr_mem[i] != NULL; i++) {
printf("%c%s", prefix, gr->gr_mem[i]);
prefix = ',';
}
printf("\n");
}
static int
group(int argc, char *argv[])
{
struct group *gr;
unsigned long id;
int i, rv;
assert(argc > 1);
assert(argv != NULL);
setgroupent(1);
rv = RV_OK;
if (argc == 2) {
while ((gr = getgrent()) != NULL)
groupprint(gr);
} else {
for (i = 2; i < argc; i++) {
if (parsenum(argv[i], &id))
gr = getgrgid((gid_t)id);
else
gr = getgrnam(argv[i]);
if (gr != NULL)
groupprint(gr);
else {
rv = RV_NOTFOUND;
break;
}
}
}
endgrent();
return rv;
}
/*
* hosts
*/
static void
hostsprint(const struct hostent *he)
{
char buf[INET6_ADDRSTRLEN];
int i;
assert(he != NULL);
if (inet_ntop(he->h_addrtype, he->h_addr, buf, sizeof(buf)) == NULL)
strlcpy(buf, "# unknown", sizeof(buf));
printf("%s\t%s",
buf, he->h_name);
for (i = 0; he->h_aliases[i] != NULL; i++) {
printf(" %s", he->h_aliases[i]);
}
printf("\n");
}
static int
hosts(int argc, char *argv[])
{
struct hostent *he;
char addr[IN6ADDRSZ];
int i, rv;
assert(argc > 1);
assert(argv != NULL);
sethostent(1);
rv = RV_OK;
if (argc == 2) {
while ((he = gethostent()) != NULL)
hostsprint(he);
} else {
for (i = 2; i < argc; i++) {
if (inet_pton(AF_INET6, argv[i], (void *)addr) > 0)
he = gethostbyaddr(addr, IN6ADDRSZ, AF_INET6);
else if (inet_pton(AF_INET, argv[i], (void *)addr) > 0)
he = gethostbyaddr(addr, INADDRSZ, AF_INET);
else
he = gethostbyname(argv[i]);
if (he != NULL)
hostsprint(he);
else {
rv = RV_NOTFOUND;
break;
}
}
}
endhostent();
return rv;
}
/*
* passwd
*/
static void
passwdprint(const struct passwd *pw)
{
assert(pw != NULL);
printf("%s:%s:%u:%u:%s:%s:%s\n",
pw->pw_name, pw->pw_passwd, pw->pw_uid, pw->pw_gid,
pw->pw_gecos, pw->pw_dir, pw->pw_shell);
}
static int
passwd(int argc, char *argv[])
{
struct passwd *pw;
unsigned long id;
int i, rv;
assert(argc > 1);
assert(argv != NULL);
setpassent(1);
rv = RV_OK;
if (argc == 2) {
while ((pw = getpwent()) != NULL)
passwdprint(pw);
} else {
for (i = 2; i < argc; i++) {
if (parsenum(argv[i], &id))
pw = getpwuid((uid_t)id);
else
pw = getpwnam(argv[i]);
if (pw != NULL)
passwdprint(pw);
else {
rv = RV_NOTFOUND;
break;
}
}
}
endpwent();
return rv;
}
/*
* shells
*/
static int
shells(int argc, char *argv[])
{
const char *sh;
int i, rv;
assert(argc > 1);
assert(argv != NULL);
setusershell();
rv = RV_OK;
if (argc == 2) {
while ((sh = getusershell()) != NULL)
printf("%s\n", sh);
} else {
for (i = 2; i < argc; i++) {
setusershell();
while ((sh = getusershell()) != NULL) {
if (strcmp(sh, argv[i]) == 0) {
printf("%s\n", sh);
break;
}
}
if (sh == NULL) {
rv = RV_NOTFOUND;
break;
}
}
}
endusershell();
return rv;
}