Date: Sat, 24 Nov 2001 22:40:06 +0700 From: Igor M Podlesny <poige@morning.ru> To: freebsd-hackers@FreeBSD.ORG Cc: Dima Dorfman <dima@trit.org> Subject: jail.c.patch (allowing to use hostnames when invoking jail(8)) Message-ID: <95121839796.20011124224006@morning.ru>
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A small patch allowing to use hostnames when invoking jail(8):
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--- jail.c.org Sat Nov 24 22:12:21 2001
+++ jail.c Sat Nov 24 22:25:46 2001
@@ -10,13 +10,18 @@
*
*/
+#include <err.h>
+#include <netdb.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
-#include <err.h>
-#include <sys/types.h>
-#include <sys/jail.h>
+#include <unistd.h>
+
#include <netinet/in.h>
+#include <sys/jail.h>
+#include <sys/socket.h>
+#include <sys/types.h>
+#include <arpa/inet.h>
int
main(int argc, char **argv)
@@ -26,7 +31,7 @@
struct in_addr in;
if (argc < 5)
- errx(1, "Usage: %s path hostname ip-number command ...\n",
+ errx(1, "Usage: %s path hostname hostname_or_ip_addr command ...\n",
argv[0]);
i = chdir(argv[1]);
if (i)
@@ -36,8 +41,23 @@
j.path = argv[1];
j.hostname = argv[2];
i = inet_aton(argv[3], &in);
- if (!i)
- errx(1, "Couldn't make sense of ip-number\n");
+ if (!i) {
+ /* check if it is resolveable */
+ struct hostent *hp;
+ hp = gethostbyname(argv[3]);
+ if (hp == NULL) {
+ errx(1, "Couldn't make sense of the jail address\n");
+ }
+ else {
+ char **p = hp->h_addr_list;
+ if (p[1] != NULL) {
+ errx(1, "Jail should have only one ip-address associated with!\n");
+ }
+ else {
+ memcpy(&in.s_addr, p[0], sizeof(in.s_addr));
+ }
+ }
+ }
j.ip_number = ntohl(in.s_addr);
i = jail(&j);
if (i)
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I consider this useful, hope you do also...
--
Best regards,
Igor mailto:poige@morning.ru
http://morning.ru/~poige
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