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freebsd/usr.bin/getent/getent.c
Pedro F. Giffuni 1de7b4b805 various: general adoption of SPDX licensing ID tags.
Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error
prone - task.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

No functional change intended.
2017-11-27 15:37:16 +00:00

718 lines
14 KiB
C

/* $NetBSD: getent.c,v 1.7 2005/08/24 14:31:02 ginsbach Exp $ */
/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2004 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Luke Mewburn.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/socket.h>
#include <sys/param.h>
#include <arpa/inet.h>
#include <arpa/nameser.h>
#include <net/if.h>
#include <netinet/if_ether.h>
#include <netinet/in.h> /* for INET6_ADDRSTRLEN */
#include <rpc/rpcent.h>
#include <assert.h>
#include <ctype.h>
#include <errno.h>
#include <grp.h>
#include <limits.h>
#include <netdb.h>
#include <pwd.h>
#include <stdarg.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <utmpx.h>
static int usage(void);
static int parsenum(const char *, unsigned long *);
static int ethers(int, char *[]);
static int group(int, char *[]);
static int hosts(int, char *[]);
static int netgroup(int, char *[]);
static int networks(int, char *[]);
static int passwd(int, char *[]);
static int protocols(int, char *[]);
static int rpc(int, char *[]);
static int services(int, char *[]);
static int shells(int, char *[]);
static int utmpx(int, char *[]);
enum {
RV_OK = 0,
RV_USAGE = 1,
RV_NOTFOUND = 2,
RV_NOENUM = 3
};
static struct getentdb {
const char *name;
int (*callback)(int, char *[]);
} databases[] = {
{ "ethers", ethers, },
{ "group", group, },
{ "hosts", hosts, },
{ "netgroup", netgroup, },
{ "networks", networks, },
{ "passwd", passwd, },
{ "protocols", protocols, },
{ "rpc", rpc, },
{ "services", services, },
{ "shells", shells, },
{ "utmpx", utmpx, },
{ NULL, NULL, },
};
int
main(int argc, char *argv[])
{
struct getentdb *curdb;
setprogname(argv[0]);
if (argc < 2)
usage();
for (curdb = databases; curdb->name != NULL; curdb++) {
if (strcmp(curdb->name, argv[1]) == 0) {
exit(curdb->callback(argc, argv));
}
}
fprintf(stderr, "Unknown database: %s\n", argv[1]);
usage();
/* NOTREACHED */
return RV_USAGE;
}
static int
usage(void)
{
struct getentdb *curdb;
fprintf(stderr, "Usage: %s database [key ...]\n",
getprogname());
fprintf(stderr, " database may be one of:\n\t");
for (curdb = databases; curdb->name != NULL; curdb++) {
fprintf(stderr, " %s", curdb->name);
}
fprintf(stderr, "\n");
exit(RV_USAGE);
/* NOTREACHED */
}
static int
parsenum(const char *word, unsigned long *result)
{
unsigned long num;
char *ep;
assert(word != NULL);
assert(result != NULL);
if (!isdigit((unsigned char)word[0]))
return 0;
errno = 0;
num = strtoul(word, &ep, 10);
if (num == ULONG_MAX && errno == ERANGE)
return 0;
if (*ep != '\0')
return 0;
*result = num;
return 1;
}
/*
* printfmtstrings --
* vprintf(format, ...),
* then the aliases (beginning with prefix, separated by sep),
* then a newline
*/
static void
printfmtstrings(char *strings[], const char *prefix, const char *sep,
const char *fmt, ...)
{
va_list ap;
const char *curpref;
int i;
va_start(ap, fmt);
vprintf(fmt, ap);
curpref = prefix;
for (i = 0; strings[i] != NULL; i++) {
printf("%s%s", curpref, strings[i]);
curpref = sep;
}
printf("\n");
va_end(ap);
}
/*
* ethers
*/
static int
ethers(int argc, char *argv[])
{
char hostname[MAXHOSTNAMELEN + 1], *hp;
struct ether_addr ea, *eap;
int i, rv;
assert(argc > 1);
assert(argv != NULL);
#define ETHERSPRINT printf("%-17s %s\n", ether_ntoa(eap), hp)
rv = RV_OK;
if (argc == 2) {
fprintf(stderr, "Enumeration not supported on ethers\n");
rv = RV_NOENUM;
} else {
for (i = 2; i < argc; i++) {
if ((eap = ether_aton(argv[i])) == NULL) {
eap = &ea;
hp = argv[i];
if (ether_hostton(hp, eap) != 0) {
rv = RV_NOTFOUND;
break;
}
} else {
hp = hostname;
if (ether_ntohost(hp, eap) != 0) {
rv = RV_NOTFOUND;
break;
}
}
ETHERSPRINT;
}
}
return rv;
}
/*
* group
*/
static int
group(int argc, char *argv[])
{
struct group *gr;
unsigned long id;
int i, rv;
assert(argc > 1);
assert(argv != NULL);
#define GROUPPRINT printfmtstrings(gr->gr_mem, ":", ",", "%s:%s:%u", \
gr->gr_name, gr->gr_passwd, gr->gr_gid)
setgroupent(1);
rv = RV_OK;
if (argc == 2) {
while ((gr = getgrent()) != NULL)
GROUPPRINT;
} else {
for (i = 2; i < argc; i++) {
if (parsenum(argv[i], &id))
gr = getgrgid((gid_t)id);
else
gr = getgrnam(argv[i]);
if (gr != NULL)
GROUPPRINT;
else {
rv = RV_NOTFOUND;
break;
}
}
}
endgrent();
return rv;
}
/*
* hosts
*/
static void
hostsprint(const struct hostent *he)
{
char buf[INET6_ADDRSTRLEN];
assert(he != NULL);
if (inet_ntop(he->h_addrtype, he->h_addr, buf, sizeof(buf)) == NULL)
strlcpy(buf, "# unknown", sizeof(buf));
printfmtstrings(he->h_aliases, " ", " ", "%-16s %s", buf, he->h_name);
}
static int
hosts(int argc, char *argv[])
{
struct hostent *he4, *he6;
char addr[IN6ADDRSZ];
int i, rv;
assert(argc > 1);
assert(argv != NULL);
sethostent(1);
he4 = he6 = NULL;
rv = RV_OK;
if (argc == 2) {
while ((he4 = gethostent()) != NULL)
hostsprint(he4);
} else {
for (i = 2; i < argc; i++) {
if (inet_pton(AF_INET6, argv[i], (void *)addr) > 0) {
he6 = gethostbyaddr(addr, IN6ADDRSZ, AF_INET6);
if (he6 != NULL)
hostsprint(he6);
} else if (inet_pton(AF_INET, argv[i],
(void *)addr) > 0) {
he4 = gethostbyaddr(addr, INADDRSZ, AF_INET);
if (he4 != NULL)
hostsprint(he4);
} else {
he6 = gethostbyname2(argv[i], AF_INET6);
if (he6 != NULL)
hostsprint(he6);
he4 = gethostbyname(argv[i]);
if (he4 != NULL)
hostsprint(he4);
}
if ( he4 == NULL && he6 == NULL ) {
rv = RV_NOTFOUND;
break;
}
}
}
endhostent();
return rv;
}
/*
* networks
*/
static void
networksprint(const struct netent *ne)
{
char buf[INET6_ADDRSTRLEN];
struct in_addr ianet;
assert(ne != NULL);
ianet = inet_makeaddr(ne->n_net, 0);
if (inet_ntop(ne->n_addrtype, &ianet, buf, sizeof(buf)) == NULL)
strlcpy(buf, "# unknown", sizeof(buf));
printfmtstrings(ne->n_aliases, " ", " ", "%-16s %s", ne->n_name, buf);
}
static int
networks(int argc, char *argv[])
{
struct netent *ne;
in_addr_t net;
int i, rv;
assert(argc > 1);
assert(argv != NULL);
setnetent(1);
rv = RV_OK;
if (argc == 2) {
while ((ne = getnetent()) != NULL)
networksprint(ne);
} else {
for (i = 2; i < argc; i++) {
net = inet_network(argv[i]);
if (net != INADDR_NONE)
ne = getnetbyaddr(net, AF_INET);
else
ne = getnetbyname(argv[i]);
if (ne != NULL)
networksprint(ne);
else {
rv = RV_NOTFOUND;
break;
}
}
}
endnetent();
return rv;
}
/*
* passwd
*/
static int
passwd(int argc, char *argv[])
{
struct passwd *pw;
unsigned long id;
int i, rv;
assert(argc > 1);
assert(argv != NULL);
#define PASSWDPRINT printf("%s:%s:%u:%u:%s:%s:%s\n", \
pw->pw_name, pw->pw_passwd, pw->pw_uid, \
pw->pw_gid, pw->pw_gecos, pw->pw_dir, pw->pw_shell)
setpassent(1);
rv = RV_OK;
if (argc == 2) {
while ((pw = getpwent()) != NULL)
PASSWDPRINT;
} else {
for (i = 2; i < argc; i++) {
if (parsenum(argv[i], &id))
pw = getpwuid((uid_t)id);
else
pw = getpwnam(argv[i]);
if (pw != NULL)
PASSWDPRINT;
else {
rv = RV_NOTFOUND;
break;
}
}
}
endpwent();
return rv;
}
/*
* 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((u_short)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 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;
}
/*
* netgroup
*/
static int
netgroup(int argc, char *argv[])
{
char *host, *user, *domain;
int first;
int rv, i;
assert(argc > 1);
assert(argv != NULL);
#define NETGROUPPRINT(s) (((s) != NULL) ? (s) : "")
rv = RV_OK;
if (argc == 2) {
fprintf(stderr, "Enumeration not supported on netgroup\n");
rv = RV_NOENUM;
} else {
for (i = 2; i < argc; i++) {
setnetgrent(argv[i]);
first = 1;
while (getnetgrent(&host, &user, &domain) != 0) {
if (first) {
first = 0;
(void)fputs(argv[i], stdout);
}
(void)printf(" (%s,%s,%s)",
NETGROUPPRINT(host),
NETGROUPPRINT(user),
NETGROUPPRINT(domain));
}
if (!first)
(void)putchar('\n');
endnetgrent();
}
}
return rv;
}
/*
* utmpx
*/
#define UTMPXPRINTID do { \
size_t i; \
for (i = 0; i < sizeof ut->ut_id; i++) \
printf("%02hhx", ut->ut_id[i]); \
} while (0)
static void
utmpxprint(const struct utmpx *ut)
{
if (ut->ut_type == EMPTY)
return;
printf("[%jd.%06u -- %.24s] ",
(intmax_t)ut->ut_tv.tv_sec, (unsigned int)ut->ut_tv.tv_usec,
ctime(&ut->ut_tv.tv_sec));
switch (ut->ut_type) {
case BOOT_TIME:
printf("system boot\n");
return;
case SHUTDOWN_TIME:
printf("system shutdown\n");
return;
case OLD_TIME:
printf("old system time\n");
return;
case NEW_TIME:
printf("new system time\n");
return;
case USER_PROCESS:
printf("user process: id=\"");
UTMPXPRINTID;
printf("\" pid=\"%d\" user=\"%s\" line=\"%s\" host=\"%s\"\n",
ut->ut_pid, ut->ut_user, ut->ut_line, ut->ut_host);
break;
case INIT_PROCESS:
printf("init process: id=\"");
UTMPXPRINTID;
printf("\" pid=\"%d\"\n", ut->ut_pid);
break;
case LOGIN_PROCESS:
printf("login process: id=\"");
UTMPXPRINTID;
printf("\" pid=\"%d\" user=\"%s\" line=\"%s\" host=\"%s\"\n",
ut->ut_pid, ut->ut_user, ut->ut_line, ut->ut_host);
break;
case DEAD_PROCESS:
printf("dead process: id=\"");
UTMPXPRINTID;
printf("\" pid=\"%d\"\n", ut->ut_pid);
break;
default:
printf("unknown record type %hu\n", ut->ut_type);
break;
}
}
static int
utmpx(int argc, char *argv[])
{
const struct utmpx *ut;
const char *file = NULL;
int rv = RV_OK, db = 0;
assert(argc > 1);
assert(argv != NULL);
if (argc == 3 || argc == 4) {
if (strcmp(argv[2], "active") == 0)
db = UTXDB_ACTIVE;
else if (strcmp(argv[2], "lastlogin") == 0)
db = UTXDB_LASTLOGIN;
else if (strcmp(argv[2], "log") == 0)
db = UTXDB_LOG;
else
rv = RV_USAGE;
if (argc == 4)
file = argv[3];
} else {
rv = RV_USAGE;
}
if (rv == RV_USAGE) {
fprintf(stderr,
"Usage: %s utmpx active | lastlogin | log [filename]\n",
getprogname());
} else if (rv == RV_OK) {
if (setutxdb(db, file) != 0)
return (RV_NOTFOUND);
while ((ut = getutxent()) != NULL)
utmpxprint(ut);
endutxent();
}
return (rv);
}