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freebsd-dev/contrib/bind/bin/dig/dig.c
Jeroen Ruigrok van der Werven a1f80258eb Virgin import of BIND v8.2.3-T5B
2000-05-26 07:17:19 +00:00

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#ifndef lint
static const char rcsid[] = "$Id: dig.c,v 8.41 2000/04/20 07:36:04 vixie Exp $";
#endif
/*
* Copyright (c) 1989
* The Regents of the University of California. All rights reserved.
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
*/
/*
* Portions Copyright (c) 1993 by Digital Equipment Corporation.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies, and that
* the name of Digital Equipment Corporation not be used in advertising or
* publicity pertaining to distribution of the document or software without
* specific, written prior permission.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
* WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT
* CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
* ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
* SOFTWARE.
*/
/*
* Portions Copyright (c) 1996-1999 by Internet Software Consortium
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
* ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
* CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
* ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
* SOFTWARE.
*/
/*********************** Notes for the BIND 4.9 release (Paul Vixie, DEC)
* dig 2.0 was written by copying sections of libresolv.a and nslookup
* and modifying them to be more useful for a general lookup utility.
* as of BIND 4.9, the changes needed to support dig have mostly been
* incorporated into libresolv.a and nslookup; dig now links against
* some of nslookup's .o files rather than #including them or maintaining
* local copies of them.
*
* while merging dig back into the BIND release, i made a number of
* structural changes. for one thing, i put all of dig's private
* library routines into this file rather than maintaining them in
* separate, #included, files. i don't like to #include ".c" files.
* i removed all calls to "bcopy", replacing them with structure
* assignments. i removed all "extern"'s of standard functions,
* replacing them with #include's of standard header files. this
* version of dig is probably as portable as the rest of BIND.
*
* i had to remove the query-time and packet-count statistics since
* the current libresolv.a is a lot harder to modify to maintain these
* than the 4.8 one (used in the original dig) was. for consolation,
* i added a "usage" message with extensive help text.
*
* to save my (limited, albeit) sanity, i ran "indent" over the source.
* i also added the standard berkeley/DEC copyrights, since this file now
* contains a fair amount of non-USC code. note that the berkeley and
* DEC copyrights do not prohibit redistribution, with or without fee;
* we add them only to protect ourselves (you have to claim copyright
* in order to disclaim liability and warranty).
*
* Paul Vixie, Palo Alto, CA, April 1993
****************************************************************************
******************************************************************
* DiG -- Domain Information Groper *
* *
* dig.c - Version 2.1 (7/12/94) ("BIND takeover") *
* *
* Developed by: Steve Hotz & Paul Mockapetris *
* USC Information Sciences Institute (USC-ISI) *
* Marina del Rey, California *
* 1989 *
* *
* dig.c - *
* Version 2.0 (9/1/90) *
* o renamed difftime() difftv() to avoid *
* clash with ANSI C *
* o fixed incorrect # args to strcmp,gettimeofday *
* o incorrect length specified to strncmp *
* o fixed broken -sticky -envsa -envset functions *
* o print options/flags redefined & modified *
* *
* Version 2.0.beta (5/9/90) *
* o output format - helpful to `doc` *
* o minor cleanup *
* o release to beta testers *
* *
* Version 1.1.beta (10/26/89) *
* o hanging zone transer (when REFUSED) fixed *
* o trailing dot added to domain names in RDATA *
* o ISI internal *
* *
* Version 1.0.tmp (8/27/89) *
* o Error in prnttime() fixed *
* o no longer dumps core on large pkts *
* o zone transfer (axfr) added *
* o -x added for inverse queries *
* (i.e. "dig -x 128.9.0.32") *
* o give address of default server *
* o accept broadcast to server @255.255.255.255 *
* *
* Version 1.0 (3/27/89) *
* o original release *
* *
* DiG is Public Domain, and may be used for any purpose as *
* long as this notice is not removed. *
******************************************************************/
/* Import. */
#include "port_before.h"
#include <sys/types.h>
#include <sys/param.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <sys/wait.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <arpa/nameser.h>
#include <isc/dst.h>
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <netdb.h>
#include <resolv.h>
#include <setjmp.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "port_after.h"
#include "../nslookup/res.h"
/* Global. */
#define VERSION 83
#define VSTRING "8.3"
#define PRF_DEF 0x2ff9
#define PRF_MIN 0xA930
#define PRF_ZONE 0x24f9
#ifndef MAXHOSTNAMELEN
#define MAXHOSTNAMELEN 256
#endif
#define SAVEENV "DiG.env"
#define DIG_MAXARGS 30
static int eecode = 0;
static FILE * qfp;
static int sockFD;
static char *defsrv, *srvmsg;
static char defbuf[40] = "default -- ";
static char srvbuf[60];
static char myhostname[MAXHOSTNAMELEN];
static struct sockaddr_in myaddress;
static u_int32_t ixfr_serial;
/* stuff for nslookup modules */
struct __res_state res;
FILE *filePtr;
jmp_buf env;
HostInfo *defaultPtr = NULL;
HostInfo curHostInfo, defaultRec;
int curHostValid = FALSE;
int queryType, queryClass;
extern int StringToClass(), StringToType(); /* subr.c */
#if defined(BSD) && BSD >= 199006 && !defined(RISCOS_BSD)
FILE *yyin = NULL;
void yyrestart(FILE *f) { }
#endif
char *pager = NULL;
/* end of nslookup stuff */
/* Forward. */
static void Usage(void);
static int SetOption(const char *);
static void res_re_init(void);
static int xstrtonum(char *);
static int printZone(ns_type, const char *,
const struct sockaddr_in *, ns_tsig_key *);
static int print_axfr(FILE *output, const u_char *msg,
size_t msglen);
static struct timeval difftv(struct timeval, struct timeval);
static void prnttime(struct timeval);
static void stackarg(char *, char **);
/* Public. */
int
main(int argc, char **argv) {
struct hostent *hp;
short port = htons(NAMESERVER_PORT);
/* Wierd stuff for SPARC alignment, hurts nothing else. */
union {
HEADER header_;
u_char packet_[PACKETSZ];
} packet_;
#define header (packet_.header_)
#define packet (packet_.packet_)
u_char answer[64*1024];
int n;
char doping[90];
char pingstr[50];
char *afile;
char *addrc, *addrend, *addrbegin;
time_t exectime;
struct timeval tv1, tv2, start_time, end_time, query_time;
char *srv;
int anyflag = 0;
int sticky = 0;
int tmp;
int qtypeSet;
int addrflag = 0;
ns_type xfr = ns_t_invalid;
int bytes_out, bytes_in;
char cmd[512];
char domain[MAXDNAME];
char msg[120], *msgptr;
char **vtmp;
char *args[DIG_MAXARGS];
char **ax;
int once = 1, dofile = 0; /* batch -vs- interactive control */
char fileq[384];
int fp;
int wait=0, delay;
int envset=0, envsave=0;
struct __res_state res_x, res_t;
char *pp;
ns_tsig_key key;
char *keyfile = NULL, *keyname = NULL;
res_ninit(&res);
res.pfcode = PRF_DEF;
qtypeSet = 0;
memset(domain, 0, sizeof domain);
gethostname(myhostname, (sizeof myhostname));
#ifdef HAVE_SA_LEN
myaddress.sin_len = sizeof(struct sockaddr_in);
#endif
myaddress.sin_family = AF_INET;
myaddress.sin_addr.s_addr = INADDR_ANY;
myaddress.sin_port = 0; /*INPORT_ANY*/;
defsrv = strcat(defbuf, inet_ntoa(res.nsaddr.sin_addr));
res_x = res;
/*
* If LOCALDEF in environment, should point to file
* containing local favourite defaults. Also look for file
* DiG.env (i.e. SAVEENV) in local directory.
*/
if ((((afile = (char *) getenv("LOCALDEF")) != (char *) NULL) &&
((fp = open(afile, O_RDONLY)) > 0)) ||
((fp = open(SAVEENV, O_RDONLY)) > 0)) {
read(fp, (char *)&res_x, (sizeof res_x));
close(fp);
res = res_x;
}
/*
* Check for batch-mode DiG; also pre-scan for 'help'.
*/
vtmp = argv;
ax = args;
while (*vtmp != NULL) {
if (strcmp(*vtmp, "-h") == 0 ||
strcmp(*vtmp, "-help") == 0 ||
strcmp(*vtmp, "-usage") == 0 ||
strcmp(*vtmp, "help") == 0) {
Usage();
exit(0);
}
if (strcmp(*vtmp, "-f") == 0) {
dofile++; once=0;
if ((qfp = fopen(*++vtmp, "r")) == NULL) {
fflush(stdout);
perror("file open");
fflush(stderr);
exit(10);
}
} else {
if (ax - args == DIG_MAXARGS) {
fprintf(stderr, "dig: too many arguments\n");
exit(10);
}
*ax++ = *vtmp;
}
vtmp++;
}
res.id = 1;
gettimeofday(&tv1, NULL);
/*
* Main section: once if cmd-line query
* while !EOF if batch mode
*/
*fileq = '\0';
while ((dofile && fgets(fileq, sizeof fileq, qfp) != NULL) ||
(!dofile && once--))
{
if (*fileq == '\n' || *fileq == '#' || *fileq==';') {
printf("%s", fileq); /* echo but otherwise ignore */
continue; /* blank lines and comments */
}
/*
* "Sticky" requests that before current parsing args
* return to current "working" environment (X******).
*/
if (sticky) {
printf(";; (using sticky settings)\n");
res = res_x;
}
/*
* Concat cmd-line and file args.
*/
stackarg(fileq, ax);
/* defaults */
queryType = ns_t_ns;
queryClass = ns_c_in;
xfr = ns_t_invalid;
*pingstr = 0;
srv = NULL;
sprintf(cmd, "\n; <<>> DiG %s <<>> ", VSTRING);
argv = args;
argc = ax - args;
/*
* More cmd-line options than anyone should ever have to
* deal with ....
*/
while (*(++argv) != NULL && **argv != '\0') {
strcat(cmd, *argv);
strcat(cmd, " ");
if (**argv == '@') {
srv = (*argv+1);
continue;
}
if (**argv == '%')
continue;
if (**argv == '+') {
SetOption(*argv+1);
continue;
}
if (**argv == '=') {
ixfr_serial = strtoul(*argv+1, NULL, 0);
continue;
}
if (strncmp(*argv, "-nost", 5) == 0) {
sticky = 0;
continue;
} else if (strncmp(*argv, "-st", 3) == 0) {
sticky++;
continue;
} else if (strncmp(*argv, "-envsa", 6) == 0) {
envsave++;
continue;
} else if (strncmp(*argv, "-envse", 6) == 0) {
envset++;
continue;
}
if (**argv == '-') {
switch (argv[0][1]) {
case 'T':
wait = atoi(*++argv);
break;
case 'c':
if ((tmp = atoi(*++argv))
|| *argv[0]=='0') {
queryClass = tmp;
} else if ((tmp = StringToClass(*argv,
0, NULL)
) != 0) {
queryClass = tmp;
} else {
printf(
"; invalid class specified\n"
);
}
break;
case 't':
if ((tmp = atoi(*++argv))
|| *argv[0]=='0') {
queryType = tmp;
qtypeSet++;
} else if ((tmp = StringToType(*argv,
0, NULL)
) != 0) {
queryType = tmp;
qtypeSet++;
} else {
printf(
"; invalid type specified\n"
);
}
break;
case 'x':
if (!qtypeSet) {
queryType = T_ANY;
qtypeSet++;
}
if (!(addrc = *++argv)) {
printf(
"; no arg for -x?\n"
);
break;
}
addrend = addrc + strlen(addrc);
if (*addrend == '.')
*addrend = '\0';
*domain = '\0';
while ((addrbegin = strrchr(addrc,'.'))) {
strcat(domain, addrbegin+1);
strcat(domain, ".");
*addrbegin = '\0';
}
strcat(domain, addrc);
strcat(domain, ".in-addr.arpa.");
break;
case 'p':
if (argv[0][2] != '\0')
port = ntohs(atoi(argv[0]+2));
else
port = htons(atoi(*++argv));
break;
case 'P':
if (argv[0][2] != '\0')
strcpy(pingstr, argv[0]+2);
else
strcpy(pingstr, "ping -s");
break;
case 'n':
if (argv[0][2] != '\0')
res.ndots = atoi(argv[0]+2);
else
res.ndots = atoi(*++argv);
break;
case 'b': {
char *a, *p;
if (argv[0][2] != '\0')
a = argv[0]+2;
else
a = *++argv;
if ((p = strchr(a, ':')) != NULL) {
*p++ = '\0';
myaddress.sin_port =
ntohs(atoi(p));
}
if (!inet_aton(a,&myaddress.sin_addr)){
fprintf(stderr,
";; bad -b addr\n");
exit(1);
}
}
break;
case 'k':
/* -k keydir:keyname */
if (argv[0][2] != '\0')
keyfile = argv[0]+2;
else
keyfile = *++argv;
keyname = strchr(keyfile, ':');
if (keyname == NULL) {
fprintf(stderr,
"key option argument should be keydir:keyname\n");
exit(1);
}
*keyname++='\0';
break;
} /* switch - */
continue;
} /* if '-' */
if ((tmp = StringToType(*argv, -1, NULL)) != -1) {
if ((T_ANY == tmp) && anyflag++) {
queryClass = C_ANY;
continue;
}
if (ns_t_xfr_p(tmp) &&
(tmp == ns_t_axfr ||
(res.options & RES_USEVC) != 0)
) {
res.pfcode = PRF_ZONE;
xfr = (ns_type)tmp;
} else {
queryType = tmp;
qtypeSet++;
}
} else if ((tmp = StringToClass(*argv, -1, NULL))
!= -1) {
queryClass = tmp;
} else {
memset(domain, 0, sizeof domain);
sprintf(domain,"%s",*argv);
}
} /* while argv remains */
/* process key options */
if (keyfile) {
#ifdef PARSE_KEYFILE
int i, n1;
char buf[BUFSIZ], *p;
FILE *fp = NULL;
int file_major, file_minor, alg;
fp = fopen(keyfile, "r");
if (fp == NULL) {
perror(keyfile);
exit(1);
}
/* Now read the header info from the file. */
i = fread(buf, 1, BUFSIZ, fp);
if (i < 5) {
fclose(fp);
exit(1);
}
fclose(fp);
p = buf;
n=strlen(p); /* get length of strings */
n1=strlen("Private-key-format: v");
if (n1 > n ||
strncmp(buf, "Private-key-format: v", n1)) {
fprintf(stderr, "Invalid key file format\n");
exit(1); /* not a match */
}
p+=n1; /* advance pointer */
sscanf((char *)p, "%d.%d", &file_major, &file_minor);
/* should do some error checking with these someday */
while (*p++!='\n'); /* skip to end of line */
n=strlen(p); /* get length of strings */
n1=strlen("Algorithm: ");
if (n1 > n || strncmp(p, "Algorithm: ", n1)) {
fprintf(stderr, "Invalid key file format\n");
exit(1); /* not a match */
}
p+=n1; /* advance pointer */
if (sscanf((char *)p, "%d", &alg)!=1) {
fprintf(stderr, "Invalid key file format\n");
exit(1);
}
while (*p++!='\n'); /* skip to end of line */
n=strlen(p); /* get length of strings */
n1=strlen("Key: ");
if (n1 > n || strncmp(p, "Key: ", n1)) {
fprintf(stderr, "Invalid key file format\n");
exit(1); /* not a match */
}
p+=n1; /* advance pointer */
pp=p;
while (*pp++!='\n'); /* skip to end of line,
* terminate it */
*--pp='\0';
key.data=malloc(1024*sizeof(char));
key.len=b64_pton(p, key.data, 1024);
strcpy(key.name, keyname);
strcpy(key.alg, "HMAC-MD5.SIG-ALG.REG.INT");
#else
/* use the dst* routines to parse the key files
*
* This requires that both the .key and the .private
* files exist in your cwd, so the keyfile parmeter
* here is assumed to be a path in which the
* K*.{key,private} files exist.
*/
DST_KEY *dst_key;
char cwd[PATH_MAX+1];
if (getcwd(cwd, PATH_MAX)==NULL) {
perror("unable to get current directory");
exit(1);
}
if (chdir(keyfile)<0) {
fprintf(stderr,
"unable to chdir to %s: %s\n", keyfile,
strerror(errno));
exit(1);
}
dst_init();
dst_key = dst_read_key(keyname,
0 /* not used for priv keys */,
KEY_HMAC_MD5, DST_PRIVATE);
if (!dst_key) {
fprintf(stderr,
"dst_read_key: error reading key\n");
exit(1);
}
key.data=malloc(1024*sizeof(char));
dst_key_to_buffer(dst_key, key.data, 1024);
key.len=dst_key->dk_key_size;
strcpy(key.name, keyname);
strcpy(key.alg, "HMAC-MD5.SIG-ALG.REG.INT");
if (chdir(cwd)<0) {
fprintf(stderr, "unable to chdir to %s: %s\n",
cwd, strerror(errno));
exit(1);
}
#endif
}
if (res.pfcode & 0x80000)
printf("; pfcode: %08lx, options: %08lx\n",
res.pfcode, res.options);
/*
* Current env. (after this parse) is to become the
* new "working" environmnet. Used in conj. with sticky.
*/
if (envset) {
res_x = res;
envset = 0;
}
/*
* Current env. (after this parse) is to become the
* new default saved environmnet. Save in user specified
* file if exists else is SAVEENV (== "DiG.env").
*/
if (envsave) {
afile = (char *) getenv("LOCALDEF");
if ((afile &&
((fp = open(afile,
O_WRONLY|O_CREAT|O_TRUNC,
S_IREAD|S_IWRITE)) > 0))
||
((fp = open(SAVEENV,
O_WRONLY|O_CREAT|O_TRUNC,
S_IREAD|S_IWRITE)) > 0)) {
write(fp, (char *)&res, (sizeof res));
close(fp);
}
envsave = 0;
}
if (res.pfcode & RES_PRF_CMD)
printf("%s\n", cmd);
addrflag = anyflag = 0;
/*
* Find address of server to query. If not dot-notation, then
* try to resolve domain-name (if so, save and turn off print
* options, this domain-query is not the one we want. Restore
* user options when done.
* Things get a bit wierd since we need to use resolver to be
* able to "put the resolver to work".
*/
srvbuf[0] = 0;
srvmsg = defsrv;
if (srv != NULL) {
struct in_addr addr;
if (inet_aton(srv, &addr)) {
res.nscount = 1;
res.nsaddr.sin_addr = addr;
srvmsg = strcat(srvbuf, srv);
} else {
res_t = res;
res_ninit(&res);
res.pfcode = 0;
res.options = RES_DEFAULT;
hp = gethostbyname(srv);
res = res_t;
if (hp == NULL
|| hp->h_addr_list == NULL
|| *hp->h_addr_list == NULL) {
fflush(stdout);
fprintf(stderr,
"; Bad server: %s -- using default server and timer opts\n",
srv);
fflush(stderr);
srvmsg = defsrv;
srv = NULL;
} else {
u_int32_t **addr;
res.nscount = 0;
for (addr = (u_int32_t**)hp->h_addr_list;
*addr && (res.nscount < MAXNS);
addr++) {
res.nsaddr_list[
res.nscount++
].sin_addr.s_addr = **addr;
}
srvmsg = strcat(srvbuf,srv);
strcat(srvbuf, " ");
strcat(srvmsg,
inet_ntoa(res.nsaddr.sin_addr));
}
}
printf("; (%d server%s found)\n",
res.nscount, (res.nscount==1)?"":"s");
res.id += res.retry;
}
{
int i;
for (i = 0; i < res.nscount; i++) {
res.nsaddr_list[i].sin_family = AF_INET;
res.nsaddr_list[i].sin_port = port;
}
res.id += res.retry;
}
if (ns_t_xfr_p(xfr)) {
int i;
for (i = 0; i < res.nscount; i++) {
int x;
if (keyfile)
x = printZone(xfr, domain,
&res.nsaddr_list[i],
&key);
else
x = printZone(xfr, domain,
&res.nsaddr_list[i],
NULL);
if (res.pfcode & RES_PRF_STATS) {
exectime = time(NULL);
printf(";; FROM: %s to SERVER: %s\n",
myhostname,
inet_ntoa(res.nsaddr_list[i]
.sin_addr));
printf(";; WHEN: %s", ctime(&exectime));
}
if (!x)
break; /* success */
}
fflush(stdout);
continue;
}
if (*domain && !qtypeSet) {
queryType = T_A;
qtypeSet++;
}
bytes_out = n = res_nmkquery(&res, QUERY, domain,
queryClass, queryType,
NULL, 0, NULL,
packet, sizeof packet);
if (n < 0) {
fflush(stderr);
printf(";; res_nmkquery: buffer too small\n\n");
continue;
}
if (queryType == T_IXFR) {
HEADER *hp = (HEADER *) packet;
u_char *cpp = packet + bytes_out;
hp->nscount = htons(1+ntohs(hp->nscount));
n = dn_comp(domain, cpp,
(sizeof packet) - (cpp - packet),
NULL, NULL);
cpp += n;
PUTSHORT(T_SOA, cpp); /* type */
PUTSHORT(C_IN, cpp); /* class */
PUTLONG(0, cpp); /* ttl */
PUTSHORT(22, cpp); /* dlen */
*cpp++ = 0; /* mname */
*cpp++ = 0; /* rname */
PUTLONG(ixfr_serial, cpp);
PUTLONG(0xDEAD, cpp); /* Refresh */
PUTLONG(0xBEEF, cpp); /* Retry */
PUTLONG(0xABCD, cpp); /* Expire */
PUTLONG(0x1776, cpp); /* Min TTL */
bytes_out = n = cpp - packet;
};
eecode = 0;
if (res.pfcode & RES_PRF_HEAD1)
fp_resstat(&res, stdout);
(void) gettimeofday(&start_time, NULL);
if (keyfile)
n = res_nsendsigned(&res, packet, n, &key, answer, sizeof answer);
else
n = res_nsend(&res, packet, n, answer, sizeof answer);
if ((bytes_in = n) < 0) {
fflush(stdout);
n = 0 - n;
msg[0]=0;
if (keyfile)
strcat(msg,";; res_nsendsigned to server ");
else
strcat(msg,";; res_nsend to server ");
strcat(msg,srvmsg);
perror(msg);
fflush(stderr);
if (!dofile) {
if (eecode)
exit(eecode);
else
exit(9);
}
}
(void) gettimeofday(&end_time, NULL);
if (res.pfcode & RES_PRF_STATS) {
time_t t;
query_time = difftv(start_time, end_time);
printf(";; Total query time: ");
prnttime(query_time);
putchar('\n');
exectime = time(NULL);
printf(";; FROM: %s to SERVER: %s\n",
myhostname, srvmsg);
printf(";; WHEN: %s", ctime(&exectime));
printf(";; MSG SIZE sent: %d rcvd: %d\n",
bytes_out, bytes_in);
}
fflush(stdout);
/*
* Argh ... not particularly elegant. Should put in *real* ping code.
* Would necessitate root priviledges for icmp port though!
*/
if (*pingstr) {
sprintf(doping,"%s %s 56 3 | tail -3",pingstr,
(srv==NULL)?(defsrv+10):srv);
system(doping);
}
putchar('\n');
/*
* Fairly crude method and low overhead method of keeping two
* batches started at different sites somewhat synchronized.
*/
gettimeofday(&tv2, NULL);
delay = (int)(tv2.tv_sec - tv1.tv_sec);
if (delay < wait) {
sleep(wait - delay);
}
}
return (eecode);
}
/* Private. */
static void
Usage() {
fputs("\
usage: dig [@server] [domain] [q-type] [q-class] {q-opt} {d-opt} [%comment]\n\
where: server,\n\
domain are names in the Domain Name System\n\
q-class is one of (in,any,...) [default: in]\n\
q-type is one of (a,any,mx,ns,soa,hinfo,axfr,txt,...) [default: a]\n\
", stderr);
fputs("\
q-opt is one of:\n\
-x dot-notation-address (shortcut to in-addr.arpa lookups)\n\
-f file (batch mode input file name)\n\
-T time (batch mode time delay, per query)\n\
-p port (nameserver is on this port) [53]\n\
-b addr[:port] (bind to this tcp address) [*]\n\
-P[ping-string] (see man page)\n\
-t query-type (synonym for q-type)\n\
-c query-class (synonym for q-class)\n\
-k keydir:keyname (sign the query with this TSIG key)\n\
-envsav,-envset (see man page)\n\
-[no]stick (see man page)\n\
", stderr);
fputs("\
d-opt is of the form ``+keyword=value'' where keyword is one of:\n\
[no]debug [no]d2 [no]recurse retry=# time=# [no]ko [no]vc\n\
[no]defname [no]search domain=NAME [no]ignore [no]primary\n\
[no]aaonly [no]cmd [no]stats [no]Header [no]header\n\
[no]ttlid [no]cl [no]qr [no]reply [no]ques [no]answer\n\
[no]author [no]addit pfdef pfmin pfset=# pfand=# pfor=#\n\
", stderr);
fputs("\
notes: defname and search don't work; use fully-qualified names.\n\
this is DiG version " VSTRING "\n\
$Id: dig.c,v 8.41 2000/04/20 07:36:04 vixie Exp $\n\
", stderr);
}
static int
SetOption(const char *string) {
char option[NAME_LEN], type[NAME_LEN], *ptr;
int i;
i = pickString(string, option, sizeof option);
if (i == 0) {
fprintf(stderr, ";*** Invalid option: %s\n", string);
/* this is ugly, but fixing the caller to behave
properly with an error return value would require a major
cleanup. */
exit(9);
}
if (strncmp(option, "aa", 2) == 0) { /* aaonly */
res.options |= RES_AAONLY;
} else if (strncmp(option, "noaa", 4) == 0) {
res.options &= ~RES_AAONLY;
} else if (strncmp(option, "deb", 3) == 0) { /* debug */
res.options |= RES_DEBUG;
} else if (strncmp(option, "nodeb", 5) == 0) {
res.options &= ~(RES_DEBUG | RES_DEBUG2);
} else if (strncmp(option, "ko", 2) == 0) { /* keepopen */
res.options |= (RES_STAYOPEN | RES_USEVC);
} else if (strncmp(option, "noko", 4) == 0) {
res.options &= ~RES_STAYOPEN;
} else if (strncmp(option, "d2", 2) == 0) { /* d2 (more debug) */
res.options |= (RES_DEBUG | RES_DEBUG2);
} else if (strncmp(option, "nod2", 4) == 0) {
res.options &= ~RES_DEBUG2;
} else if (strncmp(option, "def", 3) == 0) { /* defname */
res.options |= RES_DEFNAMES;
} else if (strncmp(option, "nodef", 5) == 0) {
res.options &= ~RES_DEFNAMES;
} else if (strncmp(option, "sea", 3) == 0) { /* search list */
res.options |= RES_DNSRCH;
} else if (strncmp(option, "nosea", 5) == 0) {
res.options &= ~RES_DNSRCH;
} else if (strncmp(option, "do", 2) == 0) { /* domain */
ptr = strchr(option, '=');
if (ptr != NULL) {
i = pickString(++ptr, res.defdname, sizeof res.defdname);
if (i == 0) { /* value's too long or non-existant. This actually
shouldn't happen due to pickString()
above */
fprintf(stderr, "*** Invalid domain: %s\n", ptr) ;
exit(9); /* see comment at previous call to exit()*/
}
}
} else if (strncmp(option, "ti", 2) == 0) { /* timeout */
ptr = strchr(option, '=');
if (ptr != NULL)
sscanf(++ptr, "%d", &res.retrans);
} else if (strncmp(option, "ret", 3) == 0) { /* retry */
ptr = strchr(option, '=');
if (ptr != NULL)
sscanf(++ptr, "%d", &res.retry);
} else if (strncmp(option, "i", 1) == 0) { /* ignore */
res.options |= RES_IGNTC;
} else if (strncmp(option, "noi", 3) == 0) {
res.options &= ~RES_IGNTC;
} else if (strncmp(option, "pr", 2) == 0) { /* primary */
res.options |= RES_PRIMARY;
} else if (strncmp(option, "nop", 3) == 0) {
res.options &= ~RES_PRIMARY;
} else if (strncmp(option, "rec", 3) == 0) { /* recurse */
res.options |= RES_RECURSE;
} else if (strncmp(option, "norec", 5) == 0) {
res.options &= ~RES_RECURSE;
} else if (strncmp(option, "v", 1) == 0) { /* vc */
res.options |= RES_USEVC;
} else if (strncmp(option, "nov", 3) == 0) {
res.options &= ~RES_USEVC;
} else if (strncmp(option, "pfset", 5) == 0) {
ptr = strchr(option, '=');
if (ptr != NULL)
res.pfcode = xstrtonum(++ptr);
} else if (strncmp(option, "pfand", 5) == 0) {
ptr = strchr(option, '=');
if (ptr != NULL)
res.pfcode = res.pfcode & xstrtonum(++ptr);
} else if (strncmp(option, "pfor", 4) == 0) {
ptr = strchr(option, '=');
if (ptr != NULL)
res.pfcode |= xstrtonum(++ptr);
} else if (strncmp(option, "pfmin", 5) == 0) {
res.pfcode = PRF_MIN;
} else if (strncmp(option, "pfdef", 5) == 0) {
res.pfcode = PRF_DEF;
} else if (strncmp(option, "an", 2) == 0) { /* answer section */
res.pfcode |= RES_PRF_ANS;
} else if (strncmp(option, "noan", 4) == 0) {
res.pfcode &= ~RES_PRF_ANS;
} else if (strncmp(option, "qu", 2) == 0) { /* question section */
res.pfcode |= RES_PRF_QUES;
} else if (strncmp(option, "noqu", 4) == 0) {
res.pfcode &= ~RES_PRF_QUES;
} else if (strncmp(option, "au", 2) == 0) { /* authority section */
res.pfcode |= RES_PRF_AUTH;
} else if (strncmp(option, "noau", 4) == 0) {
res.pfcode &= ~RES_PRF_AUTH;
} else if (strncmp(option, "ad", 2) == 0) { /* addition section */
res.pfcode |= RES_PRF_ADD;
} else if (strncmp(option, "noad", 4) == 0) {
res.pfcode &= ~RES_PRF_ADD;
} else if (strncmp(option, "tt", 2) == 0) { /* TTL & ID */
res.pfcode |= RES_PRF_TTLID;
} else if (strncmp(option, "nott", 4) == 0) {
res.pfcode &= ~RES_PRF_TTLID;
} else if (strncmp(option, "he", 2) == 0) { /* head flags stats */
res.pfcode |= RES_PRF_HEAD2;
} else if (strncmp(option, "nohe", 4) == 0) {
res.pfcode &= ~RES_PRF_HEAD2;
} else if (strncmp(option, "H", 1) == 0) { /* header all */
res.pfcode |= RES_PRF_HEADX;
} else if (strncmp(option, "noH", 3) == 0) {
res.pfcode &= ~(RES_PRF_HEADX);
} else if (strncmp(option, "qr", 2) == 0) { /* query */
res.pfcode |= RES_PRF_QUERY;
} else if (strncmp(option, "noqr", 4) == 0) {
res.pfcode &= ~RES_PRF_QUERY;
} else if (strncmp(option, "rep", 3) == 0) { /* reply */
res.pfcode |= RES_PRF_REPLY;
} else if (strncmp(option, "norep", 5) == 0) {
res.pfcode &= ~RES_PRF_REPLY;
} else if (strncmp(option, "cm", 2) == 0) { /* command line */
res.pfcode |= RES_PRF_CMD;
} else if (strncmp(option, "nocm", 4) == 0) {
res.pfcode &= ~RES_PRF_CMD;
} else if (strncmp(option, "cl", 2) == 0) { /* class mnemonic */
res.pfcode |= RES_PRF_CLASS;
} else if (strncmp(option, "nocl", 4) == 0) {
res.pfcode &= ~RES_PRF_CLASS;
} else if (strncmp(option, "st", 2) == 0) { /* stats*/
res.pfcode |= RES_PRF_STATS;
} else if (strncmp(option, "nost", 4) == 0) {
res.pfcode &= ~RES_PRF_STATS;
} else {
fprintf(stderr, "; *** Invalid option: %s\n", option);
return (ERROR);
}
res_re_init();
return (SUCCESS);
}
/*
* Force a reinitialization when the domain is changed.
*/
static void
res_re_init() {
static char localdomain[] = "LOCALDOMAIN";
u_long pfcode = res.pfcode, options = res.options;
unsigned ndots = res.ndots;
int retrans = res.retrans, retry = res.retry;
char *buf;
/*
* This is ugly but putenv() is more portable than setenv().
*/
buf = malloc((sizeof localdomain) + strlen(res.defdname) +10/*fuzz*/);
sprintf(buf, "%s=%s", localdomain, res.defdname);
putenv(buf); /* keeps the argument, so we won't free it */
res_ninit(&res);
res.pfcode = pfcode;
res.options = options;
res.ndots = ndots;
res.retrans = retrans;
res.retry = retry;
}
/*
* convert char string (decimal, octal, or hex) to integer
*/
static int
xstrtonum(char *p) {
int v = 0;
int i;
int b = 10;
int flag = 0;
while (*p != 0) {
if (!flag++)
if (*p == '0') {
b = 8; p++;
continue;
}
if (isupper(*p))
*p = tolower(*p);
if (*p == 'x') {
b = 16; p++;
continue;
}
if (isdigit(*p)) {
i = *p - '0';
} else if (isxdigit(*p)) {
i = *p - 'a' + 10;
} else {
fprintf(stderr,
"; *** Bad char in numeric string..ignored\n");
i = -1;
}
if (i >= b) {
fprintf(stderr,
"; *** Bad char in numeric string..ignored\n");
i = -1;
}
if (i >= 0)
v = v * b + i;
p++;
}
return (v);
}
typedef union {
HEADER qb1;
u_char qb2[PACKETSZ];
} querybuf;
static int
printZone(ns_type xfr, const char *zone, const struct sockaddr_in *sin,
ns_tsig_key *key)
{
static u_char *answer = NULL;
static int answerLen = 0;
querybuf buf;
HEADER *headerPtr;
int msglen, amtToRead, numRead, result = 0, sockFD, len;
int count, type, class, rlen, done, n;
int numAnswers = 0, numRecords = 0, soacnt = 0;
u_char *cp, tmp[NS_INT16SZ];
char dname[2][NS_MAXDNAME], file[NAME_LEN];
enum { NO_ERRORS, ERR_READING_LEN, ERR_READING_MSG, ERR_PRINTING }
error = NO_ERRORS;
pid_t zpid;
u_char *newmsg;
int newmsglen;
ns_tcp_tsig_state tsig_state;
int tsig_ret, tsig_required, tsig_present;
switch (xfr) {
case ns_t_axfr:
case ns_t_zxfr:
break;
default:
fprintf(stderr, ";; %s - transfer type not supported\n",
p_type(xfr));
return (ERROR);
}
/*
* Create a query packet for the requested zone name.
*/
msglen = res_nmkquery(&res, ns_o_query, zone,
queryClass, ns_t_axfr, NULL,
0, 0, buf.qb2, sizeof buf);
if (msglen < 0) {
if (res.options & RES_DEBUG)
fprintf(stderr, ";; res_nmkquery failed\n");
return (ERROR);
}
/*
* Sign the message if a key was sent
*/
if (key == NULL) {
newmsg = (u_char *)&buf;
newmsglen = msglen;
} else {
DST_KEY *dstkey;
int bufsize, siglen;
u_char sig[64];
int ret;
/* ns_sign() also calls dst_init(), but there is no harm
* doing it twice
*/
dst_init();
bufsize = msglen + 1024;
newmsg = (u_char *) malloc(bufsize);
if (newmsg == NULL) {
errno = ENOMEM;
return (-1);
}
memcpy(newmsg, (u_char *)&buf, msglen);
newmsglen = msglen;
if (strcmp(key->alg, NS_TSIG_ALG_HMAC_MD5) != 0)
dstkey = NULL;
else
dstkey = dst_buffer_to_key(key->name, KEY_HMAC_MD5,
NS_KEY_TYPE_AUTH_ONLY,
NS_KEY_PROT_ANY,
key->data, key->len);
if (dstkey == NULL) {
errno = EINVAL;
if (key)
free(newmsg);
return (-1);
}
siglen = sizeof(sig);
/* newmsglen++; */
ret = ns_sign(newmsg, &newmsglen, bufsize, NOERROR, dstkey, NULL, 0,
sig, &siglen, 0);
if (ret < 0) {
if (key)
free (newmsg);
if (ret == NS_TSIG_ERROR_NO_SPACE)
errno = EMSGSIZE;
else if (ret == -1)
errno = EINVAL;
return (ret);
}
ns_verify_tcp_init(dstkey, sig, siglen, &tsig_state);
}
/*
* Set up a virtual circuit to the server.
*/
if ((sockFD = socket(sin->sin_family, SOCK_STREAM, 0)) < 0) {
int e = errno;
perror(";; socket");
return (e);
}
if (bind(sockFD, (struct sockaddr *)&myaddress, sizeof myaddress) < 0){
int e = errno;
fprintf(stderr, ";; bind(%s:%u): %s\n",
inet_ntoa(myaddress.sin_addr),
ntohs(myaddress.sin_port),
strerror(e));
(void) close(sockFD);
sockFD = -1;
return (e);
}
if (connect(sockFD, (struct sockaddr *)sin, sizeof *sin) < 0) {
int e = errno;
perror(";; connect");
(void) close(sockFD);
sockFD = -1;
return (e);
}
/*
* Send length & message for zone transfer
*/
ns_put16(newmsglen, tmp);
if (write(sockFD, (char *)tmp, NS_INT16SZ) != NS_INT16SZ ||
write(sockFD, (char *)newmsg, newmsglen) != newmsglen) {
int e = errno;
if (key)
free (newmsg);
perror(";; write");
(void) close(sockFD);
sockFD = -1;
return (e);
}
/*
* If we're compressing, push a gzip into the pipeline.
*/
if (xfr == ns_t_zxfr) {
enum { rd = 0, wr = 1 };
int z[2];
if (pipe(z) < 0) {
int e = errno;
if (key)
free (newmsg);
perror(";; pipe");
(void) close(sockFD);
sockFD = -1;
return (e);
}
zpid = vfork();
if (zpid < 0) {
int e = errno;
if (key)
free (newmsg);
perror(";; fork");
(void) close(sockFD);
sockFD = -1;
return (e);
} else if (zpid == 0) {
/* Child. */
(void) close(z[rd]);
(void) dup2(sockFD, STDIN_FILENO);
(void) close(sockFD);
(void) dup2(z[wr], STDOUT_FILENO);
(void) close(z[wr]);
execlp("gzip", "gzip", "-d", "-v", NULL);
perror(";; child: execlp(gunzip)");
_exit(1);
}
/* Parent. */
(void) close(z[wr]);
(void) dup2(z[rd], sockFD);
(void) close(z[rd]);
}
dname[0][0] = '\0';
for (done = 0; !done; (void)NULL) {
/*
* Read the length of the response.
*/
cp = tmp;
amtToRead = INT16SZ;
while (amtToRead > 0 &&
(numRead = read(sockFD, cp, amtToRead)) > 0) {
cp += numRead;
amtToRead -= numRead;
}
if (numRead <= 0) {
error = ERR_READING_LEN;
break;
}
len = ns_get16(tmp);
if (len == 0)
break; /* nothing left to read */
/*
* The server sent too much data to fit the existing buffer --
* allocate a new one.
*/
if (len > answerLen) {
if (answerLen != 0)
free(answer);
answerLen = len;
answer = (u_char *)Malloc(answerLen);
}
/*
* Read the response.
*/
amtToRead = len;
cp = answer;
while (amtToRead > 0 &&
(numRead = read(sockFD, cp, amtToRead)) > 0) {
cp += numRead;
amtToRead -= numRead;
}
if (numRead <= 0) {
error = ERR_READING_MSG;
break;
}
result = print_axfr(stdout, answer, len);
if (result != 0) {
error = ERR_PRINTING;
break;
}
numRecords += htons(((HEADER *)answer)->ancount);
numAnswers++;
/* Header. */
cp = answer + HFIXEDSZ;
/* Question. */
for (count = ntohs(((HEADER *)answer)->qdcount);
count > 0;
count--) {
n = dn_skipname(cp, answer + len);
if (n < 0) {
error = ERR_PRINTING;
done++;
break;
}
cp += n + QFIXEDSZ;
if (cp > answer + len) {
error = ERR_PRINTING;
done++;
break;
}
}
/* Answer. */
for (count = ntohs(((HEADER *)answer)->ancount);
count > 0 && !done;
count--) {
n = dn_expand(answer, answer + len, cp,
dname[soacnt], sizeof dname[0]);
if (n < 0) {
error = ERR_PRINTING;
done++;
break;
}
cp += n;
if (cp + 3 * INT16SZ + INT32SZ > answer + len) {
error = ERR_PRINTING;
done++;
break;
}
GETSHORT(type, cp);
GETSHORT(class, cp);
cp += INT32SZ; /* ttl */
GETSHORT(rlen, cp);
cp += rlen;
if (cp > answer + len) {
error = ERR_PRINTING;
done++;
break;
}
if (type == T_SOA && soacnt++ &&
ns_samename(dname[0], dname[1]) == 1) {
done++;
break;
}
}
/*
* Verify the TSIG
*/
if (key) {
if (ns_find_tsig(answer, answer + len) != NULL)
tsig_present = 1;
else
tsig_present = 0;
if (numAnswers == 1 || soacnt > 1)
tsig_required = 1;
else
tsig_required = 0;
tsig_ret = ns_verify_tcp(answer, &len, &tsig_state,
tsig_required);
if (tsig_ret == 0) {
if (tsig_present)
printf("; TSIG ok\n");
}
else
printf("; TSIG invalid\n");
}
}
printf(";; Received %d answer%s (%d record%s).\n",
numAnswers, (numAnswers != 1) ? "s" : "",
numRecords, (numRecords != 1) ? "s" : "");
(void) close(sockFD);
sockFD = -1;
/*
* If we were uncompressing, reap the uncompressor.
*/
if (xfr == ns_t_zxfr) {
pid_t pid;
int status;
pid = wait(&status);
if (pid < 0) {
int e = errno;
perror(";; wait");
return (e);
}
if (pid != zpid) {
fprintf(stderr, ";; wrong pid (%lu != %lu)\n",
(u_long)pid, (u_long)zpid);
return (ERROR);
}
printf(";; pid %lu: exit %d, signal %d, core %c\n",
pid, WEXITSTATUS(status),
WIFSIGNALED(status) ? WTERMSIG(status) : 0,
WCOREDUMP(status) ? 't' : 'f');
}
/* XXX This should probably happen sooner than here */
if (key)
free (newmsg);
switch (error) {
case NO_ERRORS:
return (0);
case ERR_READING_LEN:
return (EMSGSIZE);
case ERR_PRINTING:
return (result);
case ERR_READING_MSG:
return (EMSGSIZE);
default:
return (EFAULT);
}
}
static int
print_axfr(FILE *file, const u_char *msg, size_t msglen) {
ns_msg handle;
if (ns_initparse(msg, msglen, &handle) < 0) {
fprintf(file, ";; ns_initparse: %s\n", strerror(errno));
return (ns_r_formerr);
}
if (ns_msg_getflag(handle, ns_f_rcode) != ns_r_noerror)
return (ns_msg_getflag(handle, ns_f_rcode));
/*
* We are looking for info from answer resource records.
* If there aren't any, return with an error. We assume
* there aren't any question records.
*/
if (ns_msg_count(handle, ns_s_an) == 0)
return (NO_INFO);
#ifdef PROTOCOLDEBUG
printf(";;; (message of %d octets has %d answers)\n",
msglen, ns_msg_count(handle, ns_s_an));
#endif
for (;;) {
static char origin[NS_MAXDNAME], name_ctx[NS_MAXDNAME];
const char *name;
char buf[2048]; /* XXX need to malloc/realloc. */
ns_rr rr;
if (ns_parserr(&handle, ns_s_an, -1, &rr)) {
if (errno != ENODEV) {
fprintf(file, ";; ns_parserr: %s\n",
strerror(errno));
return (FORMERR);
}
break;
}
name = ns_rr_name(rr);
if (origin[0] == '\0' && name[0] != '\0') {
if (strcmp(name, ".") != 0)
strcpy(origin, name);
fprintf(file, "$ORIGIN %s.\n", origin);
if (strcmp(name, ".") == 0)
strcpy(origin, name);
strcpy(name_ctx, "@");
}
if (ns_sprintrr(&handle, &rr, name_ctx, origin,
buf, sizeof buf) < 0) {
fprintf(file, ";; ns_sprintrr: %s\n", strerror(errno));
return (FORMERR);
}
strcpy(name_ctx, name);
fputs(buf, file);
fputc('\n', file);
}
return (SUCCESS);
}
static struct timeval
difftv(struct timeval a, struct timeval b) {
static struct timeval diff;
diff.tv_sec = b.tv_sec - a.tv_sec;
if ((diff.tv_usec = b.tv_usec - a.tv_usec) < 0) {
diff.tv_sec--;
diff.tv_usec += 1000000;
}
return (diff);
}
static void
prnttime(struct timeval t) {
printf("%lu msec", (u_long)(t.tv_sec * 1000 + (t.tv_usec / 1000)));
}
/*
* Take arguments appearing in simple string (from file or command line)
* place in char**.
*/
static void
stackarg(char *l, char **y) {
int done = 0;
while (!done) {
switch (*l) {
case '\t':
case ' ':
l++;
break;
case '\0':
case '\n':
done++;
*y = NULL;
break;
default:
*y++ = l;
while (!isspace(*l))
l++;
if (*l == '\n')
done++;
*l++ = '\0';
*y = NULL;
}
}
}
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