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Diffstat (limited to 'adns-0.6/client/adh-main.c')
-rw-r--r--adns-0.6/client/adh-main.c243
1 files changed, 243 insertions, 0 deletions
diff --git a/adns-0.6/client/adh-main.c b/adns-0.6/client/adh-main.c
new file mode 100644
index 0000000..81cff54
--- /dev/null
+++ b/adns-0.6/client/adh-main.c
@@ -0,0 +1,243 @@
+/*
+ * adh-main.c
+ * - useful general-purpose resolver client program
+ * main program and useful subroutines
+ */
+/*
+ * This file is
+ * Copyright (C) 1997-1999 Ian Jackson <ian@davenant.greenend.org.uk>
+ *
+ * It is part of adns, which is
+ * Copyright (C) 1997-1999 Ian Jackson <ian@davenant.greenend.org.uk>
+ * Copyright (C) 1999 Tony Finch <dot@dotat.at>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#include "adnshost.h"
+
+void sysfail(const char *what, int errnoval) {
+ fprintf(stderr,"adnshost failed: %s: %s\n",what,strerror(errnoval));
+ exit(10);
+}
+
+void usageerr(const char *fmt, ...) {
+ va_list al;
+ fputs("adnshost usage error: ",stderr);
+ va_start(al,fmt);
+ vfprintf(stderr,fmt,al);
+ va_end(al);
+ putc('\n',stderr);
+ exit(11);
+}
+
+void outerr(void) {
+ sysfail("write to stdout",errno);
+}
+
+void *xmalloc(size_t sz) {
+ void *p;
+
+ p= malloc(sz); if (!p) sysfail("malloc",sz);
+ return p;
+}
+
+char *xstrsave(const char *str) {
+ char *p;
+
+ p= xmalloc(strlen(str)+1);
+ strcpy(p,str);
+ return p;
+}
+
+void of_type(const struct optioninfo *oi, const char *arg) {
+ static const struct typename {
+ adns_rrtype type;
+ const char *desc;
+ } typenames[]= {
+ /* enhanced versions */
+ { adns_r_ns, "ns" },
+ { adns_r_soa, "soa" },
+ { adns_r_ptr, "ptr" },
+ { adns_r_mx, "mx" },
+ { adns_r_rp, "rp" },
+ { adns_r_addr, "addr" },
+
+ /* types with only one version */
+ { adns_r_cname, "cname" },
+ { adns_r_hinfo, "hinfo" },
+ { adns_r_txt, "txt" },
+
+ /* raw versions */
+ { adns_r_a, "a" },
+ { adns_r_ns_raw, "ns-" },
+ { adns_r_soa_raw, "soa-" },
+ { adns_r_ptr_raw, "ptr-" },
+ { adns_r_mx_raw, "mx-" },
+ { adns_r_rp_raw, "rp-" },
+
+ { adns_r_none, 0 }
+ };
+
+ const struct typename *tnp;
+
+ for (tnp=typenames;
+ tnp->type && strcmp(arg,tnp->desc);
+ tnp++);
+ if (!tnp->type) usageerr("unknown RR type %s",arg);
+ ov_type= tnp->type;
+}
+
+int rcode;
+
+static void process_optarg(const char *arg,
+ const char *const **argv_p,
+ const char *value) {
+ const struct optioninfo *oip;
+ int invert;
+
+ if (arg[0] == '-' || arg[0] == '+') {
+ if (arg[0] == '-' && arg[1] == '-') {
+ if (!strncmp(arg,"--no-",5)) {
+ invert= 1;
+ oip= opt_findl(arg+5);
+ } else {
+ invert= 0;
+ oip= opt_findl(arg+2);
+ }
+ if (oip->type == ot_funcarg) {
+ arg= argv_p ? *++(*argv_p) : value;
+ if (!arg) usageerr("option --%s requires a value argument",oip->lopt);
+ } else {
+ if (value) usageerr("option --%s does not take a value",oip->lopt);
+ arg= 0;
+ }
+ opt_do(oip,arg,invert);
+ } else if (arg[0] == '-' && arg[1] == 0) {
+ arg= argv_p ? *++(*argv_p) : value;
+ if (!arg) usageerr("option `-' must be followed by a domain");
+ query_do(arg);
+ } else { /* arg[1] != '-', != '\0' */
+ invert= (arg[0] == '+');
+ ++arg;
+ while (*arg) {
+ oip= opt_finds(&arg);
+ if (oip->type == ot_funcarg) {
+ if (!*arg) {
+ arg= argv_p ? *++(*argv_p) : value;
+ if (!arg) usageerr("option -%s requires a value argument",oip->sopt);
+ } else {
+ if (value) usageerr("two values for option -%s given !",oip->sopt);
+ }
+ opt_do(oip,arg,invert);
+ arg= "";
+ } else {
+ if (value) usageerr("option -%s does not take a value",oip->sopt);
+ opt_do(oip,0,invert);
+ }
+ }
+ }
+ } else { /* arg[0] != '-' */
+ query_do(arg);
+ }
+}
+
+static void read_stdin(void) {
+ static int used, avail;
+ static char *buf;
+
+ int anydone, r;
+ char *newline, *space;
+
+ anydone= 0;
+ while (!anydone || used) {
+ while (!(newline= memchr(buf,'\n',used))) {
+ if (used == avail) {
+ avail += 20; avail <<= 1;
+ buf= realloc(buf,avail);
+ if (!buf) sysfail("realloc stdin buffer",errno);
+ }
+ do {
+ r= read(0,buf+used,avail-used);
+ } while (r < 0 && errno == EINTR);
+ if (r == 0) {
+ if (used) {
+ /* fake up final newline */
+ buf[used++]= '\n';
+ r= 1;
+ } else {
+ ov_pipe= 0;
+ return;
+ }
+ }
+ if (r < 0) sysfail("read stdin",errno);
+ used += r;
+ }
+ *newline++= 0;
+ space= strchr(buf,' ');
+ if (space) *space++= 0;
+ process_optarg(buf,0,space);
+ used -= (newline-buf);
+ memmove(buf,newline,used);
+ anydone= 1;
+ }
+}
+
+int main(int argc, const char *const *argv) {
+ struct timeval *tv, tvbuf;
+ adns_query qu;
+ void *qun_v;
+ adns_answer *answer;
+ int r, maxfd;
+ fd_set readfds, writefds, exceptfds;
+ const char *arg;
+
+ while ((arg= *++argv)) process_optarg(arg,&argv,0);
+
+ if (!ov_pipe && !ads) usageerr("no domains given, and -f/--pipe not used; try --help");
+
+ ensure_adns_init();
+
+ for (;;) {
+ for (;;) {
+ qu= ov_asynch ? 0 : outstanding.head ? outstanding.head->qu : 0;
+ r= adns_check(ads,&qu,&answer,&qun_v);
+ if (r == EAGAIN) break;
+ if (r == ESRCH) { if (!ov_pipe) goto x_quit; else break; }
+ assert(!r);
+ query_done(qun_v,answer);
+ }
+ maxfd= 0;
+ FD_ZERO(&readfds);
+ FD_ZERO(&writefds);
+ FD_ZERO(&exceptfds);
+ if (ov_pipe) {
+ maxfd= 1;
+ FD_SET(0,&readfds);
+ }
+ tv= 0;
+ adns_beforeselect(ads, &maxfd, &readfds,&writefds,&exceptfds, &tv,&tvbuf,0);
+ r= select(maxfd, &readfds,&writefds,&exceptfds, tv);
+ if (r == -1) {
+ if (errno == EINTR) continue;
+ sysfail("select",errno);
+ }
+ adns_afterselect(ads, maxfd, &readfds,&writefds,&exceptfds, 0);
+ if (ov_pipe && FD_ISSET(0,&readfds)) read_stdin();
+ }
+x_quit:
+ if (fclose(stdout)) outerr();
+ exit(rcode);
+}
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