#include <sys/cdefs.h>
#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>
#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();
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);
}
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;
}
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);
}
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;
}
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;
}
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;
}
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;
}
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;
}
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;
}
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;
}
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;
}
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;
}
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;
}
#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);
}
