Signed-off-by: Alexey Zaytsev <[email protected]>
---
Hello, uml people. Does someone still maintain the uml utilities? You've been
a bit quiet for the last 4 years, but now I've got a patch for you to apply.
It's
handy when you run qemu (or anything else that wants persistent tunnels)
inside openvz containers:
http://wiki.openvz.org/VPN_via_the_TUN/TAP_device#The_tunctl_problem
tunctl/tunctl.c | 39 +++++++++++++++++++++++++++++++--------
1 files changed, 31 insertions(+), 8 deletions(-)
diff --git a/tunctl/tunctl.c b/tunctl/tunctl.c
index 16e24a2..0eca752 100644
--- a/tunctl/tunctl.c
+++ b/tunctl/tunctl.c
@@ -21,13 +21,16 @@
static void Usage(char *name)
{
- fprintf(stderr, "Create: %s [-b] [-u owner] [-g group] [-t device-name] "
+ fprintf(stderr, "Create: %s [-b] [-n [-m]] [-u owner] [-g group] [-t
device-name] "
"[-f tun-clone-device]\n", name);
fprintf(stderr, "Delete: %s -d device-name [-f tun-clone-device]\n\n",
name);
fprintf(stderr, "The default tun clone device is /dev/net/tun - some systems"
" use\n/dev/misc/net/tun instead\n\n");
- fprintf(stderr, "-b will result in brief output (just the device name)\n");
+ fprintf(stderr, "\t-b will result in brief output (just the device name)\n");
+ fprintf(stderr, "\t-n will create a non-persistent tunnel, and sleep until
killed\n");
+ fprintf(stderr, "\t-m will daemonize before slleeping, only makes sense with
-n\n");
+
exit(1);
}
@@ -38,10 +41,10 @@ int main(int argc, char **argv)
struct group *gr;
uid_t owner = -1;
gid_t group = -1;
- int tap_fd, opt, delete = 0, brief = 0;
+ int tap_fd, opt, delete = 0, brief = 0, persistent = 1, daemonize = 0;
char *tun = "", *file = "/dev/net/tun", *name = argv[0], *end;
- while((opt = getopt(argc, argv, "bd:f:t:u:g:")) > 0){
+ while((opt = getopt(argc, argv, "bd:f:t:u:g:nm")) > 0){
switch(opt) {
case 'b':
brief = 1;
@@ -83,6 +86,13 @@ int main(int argc, char **argv)
case 't':
tun = optarg;
break;
+ case 'n':
+ persistent = 0;
+ break;
+ case 'm':
+ daemonize = 1;
+ break;
+
case 'h':
default:
Usage(name);
@@ -136,21 +146,34 @@ int main(int argc, char **argv)
}
}
- if(ioctl(tap_fd, TUNSETPERSIST, 1) < 0){
- perror("enabling TUNSETPERSIST");
- exit(1);
+ if (persistent) {
+ if(ioctl(tap_fd, TUNSETPERSIST, 1) < 0){
+ perror("enabling TUNSETPERSIST");
+ exit(1);
+ }
}
if(brief)
printf("%s\n", ifr.ifr_name);
else {
- printf("Set '%s' persistent and owned by", ifr.ifr_name);
+ if (persistent) {
+ printf("Set '%s' persistent and owned by", ifr.ifr_name);
+ } else {
+ printf("(%u) Sleeping on non-persistent '%s' owned by",
+ getpid(), ifr.ifr_name);
+ }
if(owner != -1)
printf(" uid %d", owner);
if(group != -1)
printf(" gid %d", group);
printf("\n");
}
+
+ if (!persistent) {
+ if (daemonize)
+ daemon(1, 1);
+ pause();
+ }
}
return(0);
}
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