picnoir/Systemd
1
0
Fork 0
Code Issues Pull requests Projects Releases Wiki Activity

rtnl: complain if used after fork

Browse source
This commit is contained in:
Tom Gundersen 2013-10-29 17:38:31 +01:00
parent 98dd77e86e
commit adf412b9ec
2 changed files with 13 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

1
src/libsystemd-rtnl/rtnl-internal.h
View file

@ -32,6 +32,7 @@ struct sd_rtnl {
} sockaddr;
unsigned serial;
pid_t original_pid;
};
#define RTNL_DEFAULT_TIMEOUT ((usec_t) (10 * USEC_PER_SEC))

12
src/libsystemd-rtnl/sd-rtnl.c
View file

@ -43,10 +43,21 @@ static int sd_rtnl_new(sd_rtnl **ret) {
rtnl->sockaddr.nl.nl_family = AF_NETLINK;
rtnl->original_pid = getpid();
*ret = rtnl;
return 0;
}
static bool rtnl_pid_changed(sd_rtnl *rtnl) {
assert(rtnl);
/* We don't support people creating an rtnl connection and
* keeping it around over a fork(). Let's complain. */
return rtnl->original_pid != getpid();
}
int sd_rtnl_open(uint32_t groups, sd_rtnl **ret) {
_cleanup_sd_rtnl_unref_ sd_rtnl *rtnl = NULL;
int r;
@ -98,6 +109,7 @@ int sd_rtnl_send_with_reply_and_block(sd_rtnl *nl,
int r, serial;
assert_return(nl, -EINVAL);
assert_return(!rtnl_pid_changed(nl), -ECHILD);
assert_return(message, -EINVAL);
r = message_seal(nl, message);