583 lines
11 KiB
C
583 lines
11 KiB
C
/* $NetBSD: getent.c,v 1.9 2006/08/27 06:58:55 simonb Exp $ */
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/*-
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* Copyright (c) 2004-2006 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Luke Mewburn.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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__RCSID("$NetBSD: getent.c,v 1.9 2006/08/27 06:58:55 simonb Exp $");
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#endif /* not lint */
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#include <sys/socket.h>
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#include <assert.h>
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#include <ctype.h>
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#include <errno.h>
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#include <grp.h>
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#include <limits.h>
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#include <netdb.h>
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#include <pwd.h>
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#include <stdio.h>
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#include <stdarg.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <arpa/inet.h>
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#include <arpa/nameser.h>
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#include <net/if.h>
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#include <net/if_ether.h>
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#include <netinet/in.h> /* for INET6_ADDRSTRLEN */
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#include <rpc/rpcent.h>
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static int usage(void);
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static int parsenum(const char *, unsigned long *);
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static int ethers(int, char *[]);
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static int group(int, char *[]);
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static int hosts(int, char *[]);
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static int networks(int, char *[]);
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static int passwd(int, char *[]);
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static int protocols(int, char *[]);
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static int rpc(int, char *[]);
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static int services(int, char *[]);
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static int shells(int, char *[]);
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enum {
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RV_OK = 0,
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RV_USAGE = 1,
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RV_NOTFOUND = 2,
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RV_NOENUM = 3,
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};
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static struct getentdb {
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const char *name;
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int (*callback)(int, char *[]);
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} databases[] = {
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{ "ethers", ethers, },
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{ "group", group, },
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{ "hosts", hosts, },
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{ "networks", networks, },
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{ "passwd", passwd, },
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{ "protocols", protocols, },
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{ "rpc", rpc, },
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{ "services", services, },
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{ "shells", shells, },
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{ NULL, NULL, },
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};
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int
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main(int argc, char *argv[])
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{
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struct getentdb *curdb;
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setprogname(argv[0]);
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if (argc < 2)
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usage();
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for (curdb = databases; curdb->name != NULL; curdb++) {
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if (strcmp(curdb->name, argv[1]) == 0) {
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exit(curdb->callback(argc, argv));
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break;
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}
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}
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fprintf(stderr, "Unknown database: %s\n", argv[1]);
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usage();
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/* NOTREACHED */
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return RV_USAGE;
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}
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static int
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usage(void)
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{
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struct getentdb *curdb;
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fprintf(stderr, "Usage: %s database [key ...]\n",
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getprogname());
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fprintf(stderr, " database may be one of:\n\t");
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for (curdb = databases; curdb->name != NULL; curdb++) {
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fprintf(stderr, " %s", curdb->name);
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}
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fprintf(stderr, "\n");
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exit(RV_USAGE);
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/* NOTREACHED */
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}
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static int
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parsenum(const char *word, unsigned long *result)
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{
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unsigned long num;
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char *ep;
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assert(word != NULL);
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assert(result != NULL);
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if (!isdigit((unsigned char)word[0]))
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return 0;
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errno = 0;
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num = strtoul(word, &ep, 10);
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if (num == ULONG_MAX && errno == ERANGE)
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return 0;
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if (*ep != '\0')
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return 0;
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*result = num;
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return 1;
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}
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/*
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* printfmtstrings --
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* vprintf(format, ...),
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* then the aliases (beginning with prefix, separated by sep),
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* then a newline
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*/
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static void
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printfmtstrings(char *strings[], const char *prefix, const char *sep,
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const char *fmt, ...)
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{
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va_list ap;
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const char *curpref;
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int i;
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va_start(ap, fmt);
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vprintf(fmt, ap);
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curpref = prefix;
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for (i = 0; strings[i] != NULL; i++) {
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printf("%s%s", curpref, strings[i]);
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curpref = sep;
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}
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printf("\n");
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}
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/*
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* ethers
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*/
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static int
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ethers(int argc, char *argv[])
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{
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char hostname[MAXHOSTNAMELEN + 1], *hp;
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struct ether_addr ea, *eap;
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int i, rv;
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assert(argc > 1);
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assert(argv != NULL);
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#define ETHERSPRINT printf("%-17s %s\n", ether_ntoa(eap), hp)
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rv = RV_OK;
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if (argc == 2) {
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fprintf(stderr, "Enumeration not supported on ethers\n");
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rv = RV_NOENUM;
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} else {
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for (i = 2; i < argc; i++) {
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if ((eap = ether_aton(argv[i])) == NULL) {
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eap = &ea;
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hp = argv[i];
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if (ether_hostton(hp, eap) != 0) {
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rv = RV_NOTFOUND;
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break;
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}
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} else {
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hp = hostname;
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if (ether_ntohost(hp, eap) != 0) {
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rv = RV_NOTFOUND;
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break;
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}
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}
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ETHERSPRINT;
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}
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}
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return rv;
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}
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/*
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* group
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*/
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static int
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group(int argc, char *argv[])
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{
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struct group *gr;
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unsigned long id;
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int i, rv;
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assert(argc > 1);
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assert(argv != NULL);
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#define GROUPPRINT printfmtstrings(gr->gr_mem, ":", ",", "%s:%s:%u", \
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gr->gr_name, gr->gr_passwd, gr->gr_gid)
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setgroupent(1);
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rv = RV_OK;
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if (argc == 2) {
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while ((gr = getgrent()) != NULL)
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GROUPPRINT;
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} else {
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for (i = 2; i < argc; i++) {
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if (parsenum(argv[i], &id))
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gr = getgrgid(id);
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else
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gr = getgrnam(argv[i]);
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if (gr != NULL)
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GROUPPRINT;
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else {
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rv = RV_NOTFOUND;
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break;
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}
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}
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}
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endgrent();
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return rv;
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}
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/*
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* hosts
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*/
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static void
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hostsprint(const struct hostent *he)
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{
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char buf[INET6_ADDRSTRLEN];
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assert(he != NULL);
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if (inet_ntop(he->h_addrtype, he->h_addr, buf, sizeof(buf)) == NULL)
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strlcpy(buf, "# unknown", sizeof(buf));
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printfmtstrings(he->h_aliases, " ", " ", "%-16s %s", buf, he->h_name);
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}
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static int
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hosts(int argc, char *argv[])
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{
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struct hostent *he;
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char addr[IN6ADDRSZ];
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int i, rv;
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assert(argc > 1);
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assert(argv != NULL);
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sethostent(1);
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rv = RV_OK;
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if (argc == 2) {
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while ((he = gethostent()) != NULL)
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hostsprint(he);
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} else {
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for (i = 2; i < argc; i++) {
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if (inet_pton(AF_INET6, argv[i], (void *)addr) > 0)
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he = gethostbyaddr(addr, IN6ADDRSZ, AF_INET6);
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else if (inet_pton(AF_INET, argv[i], (void *)addr) > 0)
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he = gethostbyaddr(addr, INADDRSZ, AF_INET);
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else
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he = gethostbyname(argv[i]);
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if (he != NULL)
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hostsprint(he);
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else {
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rv = RV_NOTFOUND;
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break;
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}
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}
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}
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endhostent();
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return rv;
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}
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/*
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* networks
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*/
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static void
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networksprint(const struct netent *ne)
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{
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char buf[INET6_ADDRSTRLEN];
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struct in_addr ianet;
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assert(ne != NULL);
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ianet = inet_makeaddr(ne->n_net, 0);
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if (inet_ntop(ne->n_addrtype, &ianet, buf, sizeof(buf)) == NULL)
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strlcpy(buf, "# unknown", sizeof(buf));
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printfmtstrings(ne->n_aliases, " ", " ", "%-16s %s", ne->n_name, buf);
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}
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static int
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networks(int argc, char *argv[])
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{
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struct netent *ne;
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in_addr_t net;
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int i, rv;
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assert(argc > 1);
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assert(argv != NULL);
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setnetent(1);
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rv = RV_OK;
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if (argc == 2) {
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while ((ne = getnetent()) != NULL)
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networksprint(ne);
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} else {
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for (i = 2; i < argc; i++) {
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net = inet_network(argv[i]);
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if (net != INADDR_NONE)
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ne = getnetbyaddr(net, AF_INET);
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else
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ne = getnetbyname(argv[i]);
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if (ne != NULL)
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networksprint(ne);
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else {
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rv = RV_NOTFOUND;
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break;
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}
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}
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}
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endnetent();
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return rv;
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}
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/*
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* passwd
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*/
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static int
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passwd(int argc, char *argv[])
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{
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struct passwd *pw;
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unsigned long id;
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int i, rv;
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assert(argc > 1);
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assert(argv != NULL);
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#define PASSWDPRINT printf("%s:%s:%u:%u:%s:%s:%s\n", \
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pw->pw_name, pw->pw_passwd, pw->pw_uid, \
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pw->pw_gid, pw->pw_gecos, pw->pw_dir, pw->pw_shell)
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setpassent(1);
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rv = RV_OK;
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if (argc == 2) {
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while ((pw = getpwent()) != NULL)
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PASSWDPRINT;
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} else {
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for (i = 2; i < argc; i++) {
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if (parsenum(argv[i], &id))
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pw = getpwuid(id);
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else
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pw = getpwnam(argv[i]);
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if (pw != NULL)
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PASSWDPRINT;
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else {
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rv = RV_NOTFOUND;
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break;
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}
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}
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}
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endpwent();
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return rv;
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}
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/*
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* protocols
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*/
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static int
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protocols(int argc, char *argv[])
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{
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struct protoent *pe;
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unsigned long id;
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int i, rv;
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assert(argc > 1);
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assert(argv != NULL);
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#define PROTOCOLSPRINT printfmtstrings(pe->p_aliases, " ", " ", \
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"%-16s %5d", pe->p_name, pe->p_proto)
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setprotoent(1);
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rv = RV_OK;
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if (argc == 2) {
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while ((pe = getprotoent()) != NULL)
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PROTOCOLSPRINT;
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} else {
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for (i = 2; i < argc; i++) {
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if (parsenum(argv[i], &id))
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pe = getprotobynumber(id);
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else
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pe = getprotobyname(argv[i]);
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if (pe != NULL)
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PROTOCOLSPRINT;
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else {
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rv = RV_NOTFOUND;
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break;
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}
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}
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}
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endprotoent();
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return rv;
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}
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/*
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* rpc
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*/
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static int
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rpc(int argc, char *argv[])
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{
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struct rpcent *re;
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unsigned long id;
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int i, rv;
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assert(argc > 1);
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assert(argv != NULL);
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#define RPCPRINT printfmtstrings(re->r_aliases, " ", " ", \
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"%-16s %6d", \
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re->r_name, re->r_number)
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setrpcent(1);
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rv = RV_OK;
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if (argc == 2) {
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while ((re = getrpcent()) != NULL)
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RPCPRINT;
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} else {
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for (i = 2; i < argc; i++) {
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if (parsenum(argv[i], &id))
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re = getrpcbynumber(id);
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else
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re = getrpcbyname(argv[i]);
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if (re != NULL)
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RPCPRINT;
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else {
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rv = RV_NOTFOUND;
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break;
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}
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}
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}
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endrpcent();
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return rv;
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}
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/*
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* services
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*/
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static int
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services(int argc, char *argv[])
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{
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struct servent *se;
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unsigned long id;
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char *proto;
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int i, rv;
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assert(argc > 1);
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assert(argv != NULL);
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#define SERVICESPRINT printfmtstrings(se->s_aliases, " ", " ", \
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"%-16s %5d/%s", \
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se->s_name, ntohs(se->s_port), se->s_proto)
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setservent(1);
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rv = RV_OK;
|
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if (argc == 2) {
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while ((se = getservent()) != NULL)
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SERVICESPRINT;
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} else {
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for (i = 2; i < argc; i++) {
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proto = strchr(argv[i], '/');
|
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if (proto != NULL)
|
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*proto++ = '\0';
|
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if (parsenum(argv[i], &id))
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se = getservbyport(htons(id), proto);
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else
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se = getservbyname(argv[i], proto);
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if (se != NULL)
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SERVICESPRINT;
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else {
|
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rv = RV_NOTFOUND;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
endservent();
|
|
return rv;
|
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}
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|
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/*
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|
* shells
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|
*/
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|
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static int
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shells(int argc, char *argv[])
|
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{
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|
const char *sh;
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int i, rv;
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|
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assert(argc > 1);
|
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assert(argv != NULL);
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|
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#define SHELLSPRINT printf("%s\n", sh)
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|
|
setusershell();
|
|
rv = RV_OK;
|
|
if (argc == 2) {
|
|
while ((sh = getusershell()) != NULL)
|
|
SHELLSPRINT;
|
|
} else {
|
|
for (i = 2; i < argc; i++) {
|
|
setusershell();
|
|
while ((sh = getusershell()) != NULL) {
|
|
if (strcmp(sh, argv[i]) == 0) {
|
|
SHELLSPRINT;
|
|
break;
|
|
}
|
|
}
|
|
if (sh == NULL) {
|
|
rv = RV_NOTFOUND;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
endusershell();
|
|
return rv;
|
|
}
|