853 lines
16 KiB
C
853 lines
16 KiB
C
/* $NetBSD: getent.c,v 1.19 2012/03/15 02:02:23 joerg 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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*
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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 1.19 2012/03/15 02:02:23 joerg 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 <netgroup.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 <stdbool.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 <paths.h>
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#include <err.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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#include <disktab.h>
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static int usage(void) __attribute__((__noreturn__));
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static int parsenum(const char *, unsigned long *);
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static int disktab(int, char *[]);
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static int gettytab(int, char *[]);
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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 netgroup(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 printcap(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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{ "disktab", disktab, },
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{ "ethers", ethers, },
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{ "gettytab", gettytab, },
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{ "group", group, },
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{ "hosts", hosts, },
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{ "netgroup", netgroup, },
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{ "networks", networks, },
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{ "passwd", passwd, },
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{ "printcap", printcap, },
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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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return (*curdb->callback)(argc, argv);
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warn("Unknown database `%s'", argv[1]);
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usage();
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/* NOTREACHED */
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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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size_t i;
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(void)fprintf(stderr, "Usage: %s database [key ...]\n",
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getprogname());
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(void)fprintf(stderr, "\tdatabase may be one of:");
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for (i = 0, curdb = databases; curdb->name != NULL; curdb++, i++) {
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if (i % 7 == 0)
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(void)fputs("\n\t\t", stderr);
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(void)fprintf(stderr, "%s%s", i % 7 == 0 ? "" : " ",
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curdb->name);
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}
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(void)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 __printflike(4, 5) 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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size_t i;
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va_start(ap, fmt);
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(void)vprintf(fmt, ap);
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va_end(ap);
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curpref = prefix;
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for (i = 0; strings[i] != NULL; i++) {
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(void)printf("%s%s", curpref, strings[i]);
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curpref = sep;
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}
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(void)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 (void)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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warnx("Enumeration not supported on ethers");
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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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(void)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((gid_t)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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(void)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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* netgroup
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*/
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static int
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netgroup(int argc, char *argv[])
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{
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int rv, i;
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bool first;
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const char *host, *user, *domain;
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assert(argc > 1);
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assert(argv != NULL);
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#define NETGROUPPRINT(s) (((s) != NULL) ? (s) : "")
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rv = RV_OK;
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if (argc == 2) {
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warnx("Enumeration not supported on netgroup");
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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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setnetgrent(argv[i]);
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first = true;
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while (getnetgrent(&host, &user, &domain) != 0) {
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if (first) {
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first = false;
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(void)fputs(argv[i], stdout);
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}
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(void)printf(" (%s,%s,%s)",
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NETGROUPPRINT(host),
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NETGROUPPRINT(user),
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NETGROUPPRINT(domain));
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}
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if (!first)
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(void)putchar('\n');
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endnetgrent();
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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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* 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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(void)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 (void)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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(void)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((uid_t)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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static char *
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mygetent(const char * const * db_array, const char *name)
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{
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char *buf = NULL;
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int error;
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switch (error = cgetent(&buf, db_array, name)) {
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case -3:
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warnx("tc= loop in record `%s' in `%s'", name, db_array[0]);
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break;
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case -2:
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warn("system error fetching record `%s' in `%s'", name,
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db_array[0]);
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break;
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case -1:
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case 0:
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break;
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case 1:
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warnx("tc= reference not found in record for `%s' in `%s'",
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name, db_array[0]);
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break;
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default:
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warnx("unknown error %d in record `%s' in `%s'", error, name,
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db_array[0]);
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break;
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}
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return buf;
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}
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static char *
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mygetone(const char * const * db_array, int first)
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{
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char *buf = NULL;
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int error;
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switch (error = (first ? cgetfirst : cgetnext)(&buf, db_array)) {
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case -2:
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warnx("tc= loop in `%s'", db_array[0]);
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break;
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case -1:
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warn("system error fetching record in `%s'", db_array[0]);
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break;
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case 0:
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case 1:
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break;
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case 2:
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warnx("tc= reference not found in `%s'", db_array[0]);
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break;
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default:
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warnx("unknown error %d in `%s'", error, db_array[0]);
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break;
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}
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return buf;
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}
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static void
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capprint(const char *cap)
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{
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char *c = strchr(cap, ':');
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if (c)
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if (c == cap)
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(void)printf("true\n");
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else {
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int l = (int)(c - cap);
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(void)printf("%*.*s\n", l, l, cap);
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}
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else
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(void)printf("%s\n", cap);
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}
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static void
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prettyprint(char *b)
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{
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#define TERMWIDTH 65
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int did = 0;
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size_t len;
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char *s, c;
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for (;;) {
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len = strlen(b);
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if (len <= TERMWIDTH) {
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done:
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if (did)
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printf("\t:");
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printf("%s\n", b);
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return;
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}
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for (s = b + TERMWIDTH; s > b && *s != ':'; s--)
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continue;
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if (*s++ != ':')
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goto done;
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c = *s;
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*s = '\0';
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if (did)
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printf("\t:");
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did++;
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printf("%s\\\n", b);
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*s = c;
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b = s;
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}
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}
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static void
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handleone(const char * const *db_array, char *b, int recurse, int pretty,
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int level)
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{
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char *tc;
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if (level && pretty)
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|
printf("\n");
|
|
if (pretty)
|
|
prettyprint(b);
|
|
else
|
|
printf("%s\n", b);
|
|
if (!recurse || cgetstr(b, "tc", &tc) <= 0)
|
|
return;
|
|
|
|
b = mygetent(db_array, tc);
|
|
free(tc);
|
|
|
|
if (b == NULL)
|
|
return;
|
|
|
|
handleone(db_array, b, recurse, pretty, ++level);
|
|
free(b);
|
|
}
|
|
|
|
static int
|
|
handlecap(const char *db, int argc, char *argv[])
|
|
{
|
|
static const char sfx[] = "=#:";
|
|
const char *db_array[] = { db, NULL };
|
|
char *b, *cap;
|
|
int i, rv, c;
|
|
size_t j;
|
|
int expand = 1, recurse = 0, pretty = 0;
|
|
|
|
assert(argc > 1);
|
|
assert(argv != NULL);
|
|
|
|
argc--;
|
|
argv++;
|
|
while ((c = getopt(argc, argv, "pnr")) != -1)
|
|
switch (c) {
|
|
case 'n':
|
|
expand = 0;
|
|
break;
|
|
case 'r':
|
|
expand = 0;
|
|
recurse = 1;
|
|
break;
|
|
case 'p':
|
|
pretty = 1;
|
|
break;
|
|
default:
|
|
usage();
|
|
break;
|
|
}
|
|
|
|
argc -= optind;
|
|
argv += optind;
|
|
csetexpandtc(expand);
|
|
rv = RV_OK;
|
|
if (argc == 0) {
|
|
for (b = mygetone(db_array, 1); b; b = mygetone(db_array, 0)) {
|
|
handleone(db_array, b, recurse, pretty, 0);
|
|
free(b);
|
|
}
|
|
} else {
|
|
if ((b = mygetent(db_array, argv[0])) == NULL)
|
|
return RV_NOTFOUND;
|
|
if (argc == 1)
|
|
handleone(db_array, b, recurse, pretty, 0);
|
|
else {
|
|
for (i = 2; i < argc; i++) {
|
|
for (j = 0; j < sizeof(sfx) - 1; j++) {
|
|
cap = cgetcap(b, argv[i], sfx[j]);
|
|
if (cap) {
|
|
capprint(cap);
|
|
break;
|
|
}
|
|
}
|
|
if (j == sizeof(sfx) - 1)
|
|
printf("false\n");
|
|
}
|
|
}
|
|
free(b);
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
/*
|
|
* gettytab
|
|
*/
|
|
|
|
static int
|
|
gettytab(int argc, char *argv[])
|
|
{
|
|
return handlecap(_PATH_GETTYTAB, argc, argv);
|
|
}
|
|
|
|
/*
|
|
* printcap
|
|
*/
|
|
|
|
static int
|
|
printcap(int argc, char *argv[])
|
|
{
|
|
return handlecap(_PATH_PRINTCAP, argc, argv);
|
|
}
|
|
|
|
/*
|
|
* disktab
|
|
*/
|
|
|
|
static int
|
|
disktab(int argc, char *argv[])
|
|
{
|
|
return handlecap(_PATH_DISKTAB, argc, argv);
|
|
}
|
|
|
|
/*
|
|
* protocols
|
|
*/
|
|
|
|
static int
|
|
protocols(int argc, char *argv[])
|
|
{
|
|
struct protoent *pe;
|
|
unsigned long id;
|
|
int i, rv;
|
|
|
|
assert(argc > 1);
|
|
assert(argv != NULL);
|
|
|
|
#define PROTOCOLSPRINT printfmtstrings(pe->p_aliases, " ", " ", \
|
|
"%-16s %5d", pe->p_name, pe->p_proto)
|
|
|
|
setprotoent(1);
|
|
rv = RV_OK;
|
|
if (argc == 2) {
|
|
while ((pe = getprotoent()) != NULL)
|
|
PROTOCOLSPRINT;
|
|
} else {
|
|
for (i = 2; i < argc; i++) {
|
|
if (parsenum(argv[i], &id))
|
|
pe = getprotobynumber((int)id);
|
|
else
|
|
pe = getprotobyname(argv[i]);
|
|
if (pe != NULL)
|
|
PROTOCOLSPRINT;
|
|
else {
|
|
rv = RV_NOTFOUND;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
endprotoent();
|
|
return rv;
|
|
}
|
|
|
|
/*
|
|
* rpc
|
|
*/
|
|
|
|
static int
|
|
rpc(int argc, char *argv[])
|
|
{
|
|
struct rpcent *re;
|
|
unsigned long id;
|
|
int i, rv;
|
|
|
|
assert(argc > 1);
|
|
assert(argv != NULL);
|
|
|
|
#define RPCPRINT printfmtstrings(re->r_aliases, " ", " ", \
|
|
"%-16s %6d", \
|
|
re->r_name, re->r_number)
|
|
|
|
setrpcent(1);
|
|
rv = RV_OK;
|
|
if (argc == 2) {
|
|
while ((re = getrpcent()) != NULL)
|
|
RPCPRINT;
|
|
} else {
|
|
for (i = 2; i < argc; i++) {
|
|
if (parsenum(argv[i], &id))
|
|
re = getrpcbynumber((int)id);
|
|
else
|
|
re = getrpcbyname(argv[i]);
|
|
if (re != NULL)
|
|
RPCPRINT;
|
|
else {
|
|
rv = RV_NOTFOUND;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
endrpcent();
|
|
return rv;
|
|
}
|
|
|
|
/*
|
|
* services
|
|
*/
|
|
|
|
static int
|
|
services(int argc, char *argv[])
|
|
{
|
|
struct servent *se;
|
|
unsigned long id;
|
|
char *proto;
|
|
int i, rv;
|
|
|
|
assert(argc > 1);
|
|
assert(argv != NULL);
|
|
|
|
#define SERVICESPRINT printfmtstrings(se->s_aliases, " ", " ", \
|
|
"%-16s %5d/%s", \
|
|
se->s_name, ntohs(se->s_port), se->s_proto)
|
|
|
|
setservent(1);
|
|
rv = RV_OK;
|
|
if (argc == 2) {
|
|
while ((se = getservent()) != NULL)
|
|
SERVICESPRINT;
|
|
} else {
|
|
for (i = 2; i < argc; i++) {
|
|
proto = strchr(argv[i], '/');
|
|
if (proto != NULL)
|
|
*proto++ = '\0';
|
|
if (parsenum(argv[i], &id))
|
|
se = getservbyport(htons(id), proto);
|
|
else
|
|
se = getservbyname(argv[i], proto);
|
|
if (se != NULL)
|
|
SERVICESPRINT;
|
|
else {
|
|
rv = RV_NOTFOUND;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
endservent();
|
|
return rv;
|
|
}
|
|
|
|
|
|
/*
|
|
* shells
|
|
*/
|
|
|
|
static int
|
|
shells(int argc, char *argv[])
|
|
{
|
|
const char *sh;
|
|
int i, rv;
|
|
|
|
assert(argc > 1);
|
|
assert(argv != NULL);
|
|
|
|
#define SHELLSPRINT (void)printf("%s\n", sh)
|
|
|
|
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;
|
|
}
|