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/* $OpenBSD: getent.c,v 1.14 2016/02/01 19:57:28 jca Exp $ */ |
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/* $NetBSD: getent.c,v 1.7 2005/08/24 14:31:02 ginsbach Exp $ */ |
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/*- |
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* Copyright (c) 2004 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/types.h> |
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#include <sys/socket.h> |
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#include <ctype.h> |
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#include <err.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 <net/if.h> |
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#include <netinet/in.h> /* for INET6_ADDRSTRLEN */ |
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#include <netinet/if_ether.h> |
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#include <arpa/inet.h> |
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#include <arpa/nameser.h> |
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#include <rpc/rpc.h> |
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static int usage(void); |
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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 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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extern char *__progname; |
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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 (*fn)(int, char *[]); |
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const char *pledge; |
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} databases[] = { |
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{ "ethers", ethers, "stdio rpath" }, |
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{ "group", group, "stdio getpw" }, |
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{ "hosts", hosts, "stdio dns" }, |
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{ "passwd", passwd, "stdio getpw" }, |
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{ "protocols", protocols, "stdio rpath" }, |
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{ "rpc", rpc, "stdio rpath" }, |
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{ "services", services, "stdio rpath" }, |
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{ "shells", shells, "stdio rpath" }, |
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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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if (pledge("stdio dns rpath getpw flock cpath wpath", NULL) == -1) |
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err(1, "pledge"); |
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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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if (pledge(curdb->pledge, NULL) == -1) |
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err(1, "pledge"); |
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exit(curdb->fn(argc, argv)); |
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break; |
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} |
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} |
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fprintf(stderr, "%s: unknown database: %s\n", __progname, argv[1]); |
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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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fprintf(stderr, "usage: %s database [key ...]\n", __progname); |
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exit(RV_USAGE); |
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/* NOTREACHED */ |
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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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va_end(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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150 |
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#define ETHERSPRINT printf("%-17s %s\n", ether_ntoa(eap), hp) |
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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[HOST_NAME_MAX+1], *hp; |
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int i, rv = RV_OK; |
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struct ether_addr ea, *eap; |
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159 |
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if (argc == 2) { |
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fprintf(stderr, "%s: Enumeration not supported on ethers\n", |
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__progname); |
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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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#define GROUPPRINT \ |
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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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static int |
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group(int argc, char *argv[]) |
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{ |
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int i, rv = RV_OK; |
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struct group *gr; |
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setgroupent(1); |
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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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const char *err; |
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long long id = strtonum(argv[i], 0, UINT_MAX, &err); |
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if (!err) |
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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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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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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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hostsaddrinfo(char* name) |
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{ |
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struct addrinfo hints, *res, *res0; |
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void *src; |
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int rv; |
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char buf[INET6_ADDRSTRLEN]; |
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rv = RV_NOTFOUND; |
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memset(buf, 0, sizeof(buf)); |
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memset(&hints, 0, sizeof(hints)); |
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hints.ai_family = PF_UNSPEC; |
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hints.ai_socktype = SOCK_DGRAM; |
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if (getaddrinfo(name, NULL, &hints, &res0) == 0) { |
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for (res = res0; res; res = res->ai_next) { |
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switch (res->ai_family) { |
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case AF_INET: |
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src = &((struct sockaddr_in*) |
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res->ai_addr)->sin_addr; |
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break; |
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case AF_INET6: |
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src = &((struct sockaddr_in6*) |
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res->ai_addr)->sin6_addr; |
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break; |
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default: /* not reached */ |
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src = NULL; |
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} |
257 |
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if (src==NULL || inet_ntop(res->ai_family, src, buf, |
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sizeof(buf)) == NULL) |
259 |
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strlcpy(buf, "# unknown", sizeof(buf)); |
260 |
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else |
261 |
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rv = RV_OK; |
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printf("%-39s %s\n", buf, name); |
263 |
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} |
264 |
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freeaddrinfo(res0); |
265 |
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} |
266 |
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267 |
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return (rv); |
268 |
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} |
269 |
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270 |
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static int |
271 |
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hosts(int argc, char *argv[]) |
272 |
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{ |
273 |
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char addr[IN6ADDRSZ]; |
274 |
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int i, rv = RV_OK; |
275 |
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struct hostent *he; |
276 |
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277 |
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if (argc == 2) { |
278 |
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fprintf(stderr, "%s: Enumeration not supported on hosts\n", |
279 |
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__progname); |
280 |
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rv = RV_NOENUM; |
281 |
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} else { |
282 |
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for (i = 2; i < argc; i++) { |
283 |
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he = NULL; |
284 |
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if (inet_pton(AF_INET6, argv[i], (void *)addr) > 0) |
285 |
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he = gethostbyaddr(addr, IN6ADDRSZ, AF_INET6); |
286 |
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else if (inet_pton(AF_INET, argv[i], (void *)addr) > 0) |
287 |
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he = gethostbyaddr(addr, INADDRSZ, AF_INET); |
288 |
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if (he != NULL) |
289 |
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hostsprint(he); |
290 |
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else if ((rv = hostsaddrinfo(argv[i])) == RV_NOTFOUND) |
291 |
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break; |
292 |
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} |
293 |
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} |
294 |
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return rv; |
295 |
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} |
296 |
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297 |
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#define PASSWDPRINT \ |
298 |
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printf("%s:%s:%u:%u:%s:%s:%s\n", \ |
299 |
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pw->pw_name, pw->pw_passwd, pw->pw_uid, \ |
300 |
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pw->pw_gid, pw->pw_gecos, pw->pw_dir, pw->pw_shell) |
301 |
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302 |
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static int |
303 |
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passwd(int argc, char *argv[]) |
304 |
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{ |
305 |
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int i, rv = RV_OK; |
306 |
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struct passwd *pw; |
307 |
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308 |
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setpassent(1); |
309 |
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if (argc == 2) { |
310 |
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while ((pw = getpwent()) != NULL) |
311 |
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PASSWDPRINT; |
312 |
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} else { |
313 |
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for (i = 2; i < argc; i++) { |
314 |
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const char *err; |
315 |
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long long id = strtonum(argv[i], 0, UINT_MAX, &err); |
316 |
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317 |
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if (!err) |
318 |
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pw = getpwuid((uid_t)id); |
319 |
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else |
320 |
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pw = getpwnam(argv[i]); |
321 |
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if (pw != NULL) |
322 |
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PASSWDPRINT; |
323 |
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else { |
324 |
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rv = RV_NOTFOUND; |
325 |
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break; |
326 |
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} |
327 |
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} |
328 |
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} |
329 |
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endpwent(); |
330 |
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return rv; |
331 |
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} |
332 |
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333 |
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#define PROTOCOLSPRINT \ |
334 |
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printfmtstrings(pe->p_aliases, " ", " ", \ |
335 |
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"%-16s %5d", pe->p_name, pe->p_proto) |
336 |
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|
337 |
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static int |
338 |
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protocols(int argc, char *argv[]) |
339 |
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{ |
340 |
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struct protoent *pe; |
341 |
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int i, rv = RV_OK; |
342 |
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|
343 |
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setprotoent(1); |
344 |
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if (argc == 2) { |
345 |
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while ((pe = getprotoent()) != NULL) |
346 |
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PROTOCOLSPRINT; |
347 |
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} else { |
348 |
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for (i = 2; i < argc; i++) { |
349 |
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const char *err; |
350 |
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long long id = strtonum(argv[i], 0, UINT_MAX, &err); |
351 |
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352 |
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if (!err) |
353 |
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pe = getprotobynumber((int)id); |
354 |
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else |
355 |
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pe = getprotobyname(argv[i]); |
356 |
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if (pe != NULL) |
357 |
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PROTOCOLSPRINT; |
358 |
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else { |
359 |
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rv = RV_NOTFOUND; |
360 |
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break; |
361 |
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} |
362 |
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} |
363 |
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} |
364 |
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endprotoent(); |
365 |
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return rv; |
366 |
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} |
367 |
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|
368 |
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#define RPCPRINT \ |
369 |
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printfmtstrings(re->r_aliases, " ", " ", \ |
370 |
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"%-16s %6d", re->r_name, re->r_number) |
371 |
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|
372 |
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static int |
373 |
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rpc(int argc, char *argv[]) |
374 |
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{ |
375 |
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struct rpcent *re; |
376 |
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int i, rv = RV_OK; |
377 |
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|
378 |
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setrpcent(1); |
379 |
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if (argc == 2) { |
380 |
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while ((re = getrpcent()) != NULL) |
381 |
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RPCPRINT; |
382 |
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} else { |
383 |
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for (i = 2; i < argc; i++) { |
384 |
|
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const char *err; |
385 |
|
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long long id = strtonum(argv[i], 0, UINT_MAX, &err); |
386 |
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|
387 |
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if (!err) |
388 |
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re = getrpcbynumber((int)id); |
389 |
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else |
390 |
|
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re = getrpcbyname(argv[i]); |
391 |
|
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if (re != NULL) |
392 |
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RPCPRINT; |
393 |
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else { |
394 |
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rv = RV_NOTFOUND; |
395 |
|
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break; |
396 |
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} |
397 |
|
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} |
398 |
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} |
399 |
|
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endrpcent(); |
400 |
|
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return rv; |
401 |
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} |
402 |
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|
403 |
|
|
#define SERVICESPRINT \ |
404 |
|
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printfmtstrings(se->s_aliases, " ", " ", \ |
405 |
|
|
"%-16s %5d/%s", se->s_name, ntohs(se->s_port), se->s_proto) |
406 |
|
|
|
407 |
|
|
static int |
408 |
|
|
services(int argc, char *argv[]) |
409 |
|
|
{ |
410 |
|
|
struct servent *se; |
411 |
|
|
int i, rv = RV_OK; |
412 |
|
|
|
413 |
|
|
setservent(1); |
414 |
|
|
if (argc == 2) { |
415 |
|
|
while ((se = getservent()) != NULL) |
416 |
|
|
SERVICESPRINT; |
417 |
|
|
} else { |
418 |
|
|
for (i = 2; i < argc; i++) { |
419 |
|
|
const char *err; |
420 |
|
|
long long id; |
421 |
|
|
char *proto = strchr(argv[i], '/'); |
422 |
|
|
|
423 |
|
|
if (proto != NULL) |
424 |
|
|
*proto++ = '\0'; |
425 |
|
|
id = strtonum(argv[i], 0, UINT_MAX, &err); |
426 |
|
|
if (!err) |
427 |
|
|
se = getservbyport(htons((u_short)id), proto); |
428 |
|
|
else |
429 |
|
|
se = getservbyname(argv[i], proto); |
430 |
|
|
if (se != NULL) |
431 |
|
|
SERVICESPRINT; |
432 |
|
|
else { |
433 |
|
|
rv = RV_NOTFOUND; |
434 |
|
|
break; |
435 |
|
|
} |
436 |
|
|
} |
437 |
|
|
} |
438 |
|
|
endservent(); |
439 |
|
|
return rv; |
440 |
|
|
} |
441 |
|
|
|
442 |
|
|
#define SHELLSPRINT printf("%s\n", sh) |
443 |
|
|
|
444 |
|
|
static int |
445 |
|
|
shells(int argc, char *argv[]) |
446 |
|
|
{ |
447 |
|
|
const char *sh; |
448 |
|
|
int i, rv = RV_OK; |
449 |
|
|
|
450 |
|
|
setusershell(); |
451 |
|
|
if (argc == 2) { |
452 |
|
|
while ((sh = getusershell()) != NULL) |
453 |
|
|
SHELLSPRINT; |
454 |
|
|
} else { |
455 |
|
|
for (i = 2; i < argc; i++) { |
456 |
|
|
setusershell(); |
457 |
|
|
while ((sh = getusershell()) != NULL) { |
458 |
|
|
if (strcmp(sh, argv[i]) == 0) { |
459 |
|
|
SHELLSPRINT; |
460 |
|
|
break; |
461 |
|
|
} |
462 |
|
|
} |
463 |
|
|
if (sh == NULL) { |
464 |
|
|
rv = RV_NOTFOUND; |
465 |
|
|
break; |
466 |
|
|
} |
467 |
|
|
} |
468 |
|
|
} |
469 |
|
|
endusershell(); |
470 |
|
|
return rv; |
471 |
|
|
} |