438 lines
9.2 KiB
C
438 lines
9.2 KiB
C
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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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* Timo Teräs cleaned up the code for use in Alpine Linux with musl libc.
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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/socket.h>
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#include <sys/param.h>
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#include <ctype.h>
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#include <errno.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 <grp.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/ethernet.h>
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#include <netinet/ether.h>
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#include <netinet/in.h>
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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 int usage(const char *);
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static int 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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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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__attribute__ ((format (printf, 4, 5)))
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static void 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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static int 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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if (argc == 2) {
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warnx("Enumeration not supported on ethers");
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return RV_NOENUM;
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}
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rv = RV_OK;
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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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(void)printf("%-17s %s\n", ether_ntoa(eap), hp);
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}
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return rv;
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}
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static void groupprint(const struct group *gr)
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{
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printfmtstrings(gr->gr_mem, ":", ",", "%s:%s:%u",
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gr->gr_name, gr->gr_passwd, gr->gr_gid);
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}
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static int 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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rv = RV_OK;
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if (argc == 2) {
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while ((gr = getgrent()) != NULL)
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groupprint(gr);
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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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rv = RV_NOTFOUND;
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break;
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}
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groupprint(gr);
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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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static void hostsprint(const struct hostent *he)
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{
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char buf[INET6_ADDRSTRLEN];
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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 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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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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rv = RV_NOTFOUND;
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break;
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}
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hostsprint(he);
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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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static void 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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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 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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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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rv = RV_NOTFOUND;
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break;
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}
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networksprint(ne);
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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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static void passwdprint(struct passwd *pw)
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{
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(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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}
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static int 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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rv = RV_OK;
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if (argc == 2) {
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while ((pw = getpwent()) != NULL)
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passwdprint(pw);
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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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rv = RV_NOTFOUND;
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break;
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}
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passwdprint(pw);
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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 void protocolsprint(struct protoent *pe)
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{
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printfmtstrings(pe->p_aliases, " ", " ",
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"%-16s %5d", pe->p_name, pe->p_proto);
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}
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static int 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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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(pe);
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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((int)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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rv = RV_NOTFOUND;
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break;
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}
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protocolsprint(pe);
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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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static void servicesprint(struct servent *se)
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{
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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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}
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static int 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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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(se);
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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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rv = RV_NOTFOUND;
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break;
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}
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servicesprint(se);
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}
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}
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endservent();
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return rv;
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}
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static int 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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setusershell();
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rv = RV_OK;
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if (argc == 2) {
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while ((sh = getusershell()) != NULL)
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(void)printf("%s\n", sh);
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} else {
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for (i = 2; i < argc; i++) {
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setusershell();
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while ((sh = getusershell()) != NULL) {
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if (strcmp(sh, argv[i]) == 0) {
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(void)printf("%s\n", sh);
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break;
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}
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}
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if (sh == NULL) {
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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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endusershell();
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return rv;
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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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|
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{ "ethers", ethers, },
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|
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{ "group", group, },
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|
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{ "hosts", hosts, },
|
||
|
|
{ "networks", networks, },
|
||
|
|
{ "passwd", passwd, },
|
||
|
|
{ "protocols", protocols, },
|
||
|
|
{ "services", services, },
|
||
|
|
{ "shells", shells, },
|
||
|
|
|
||
|
|
{ NULL, NULL, },
|
||
|
|
};
|
||
|
|
|
||
|
|
static int usage(const char *arg0)
|
||
|
|
{
|
||
|
|
struct getentdb *curdb;
|
||
|
|
size_t i;
|
||
|
|
|
||
|
|
(void)fprintf(stderr, "Usage: %s database [key ...]\n", arg0);
|
||
|
|
(void)fprintf(stderr, "\tdatabase may be one of:");
|
||
|
|
for (i = 0, curdb = databases; curdb->name != NULL; curdb++, i++) {
|
||
|
|
if (i % 7 == 0)
|
||
|
|
(void)fputs("\n\t\t", stderr);
|
||
|
|
(void)fprintf(stderr, "%s%s", i % 7 == 0 ? "" : " ",
|
||
|
|
curdb->name);
|
||
|
|
}
|
||
|
|
(void)fprintf(stderr, "\n");
|
||
|
|
exit(RV_USAGE);
|
||
|
|
/* NOTREACHED */
|
||
|
|
}
|
||
|
|
|
||
|
|
int
|
||
|
|
main(int argc, char *argv[])
|
||
|
|
{
|
||
|
|
struct getentdb *curdb;
|
||
|
|
|
||
|
|
if (argc < 2)
|
||
|
|
usage(argv[0]);
|
||
|
|
for (curdb = databases; curdb->name != NULL; curdb++)
|
||
|
|
if (strcmp(curdb->name, argv[1]) == 0)
|
||
|
|
return (*curdb->callback)(argc, argv);
|
||
|
|
|
||
|
|
warn("Unknown database `%s'", argv[1]);
|
||
|
|
usage(argv[0]);
|
||
|
|
/* NOTREACHED */
|
||
|
|
}
|