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rtnl fd check 

Prevent accidental damage from rtnl library if fd is uninitialized.

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
This commit is contained in:
Stephen Hemminger 2006-09-26 10:41:57 -07:00
parent 77219712bf
commit 3bfa73ff99
2 changed files with 5 additions and 2 deletions
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2
ip/ip.c
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@ -36,7 +36,7 @@ int timestamp = 0;
char * _SL_ = NULL; char * _SL_ = NULL;
char *batch_file = NULL; char *batch_file = NULL;
int force = 0; int force = 0;
struct rtnl_handle rth; struct rtnl_handle rth = { .fd = -1 };
static void usage(void) __attribute__((noreturn)); static void usage(void) __attribute__((noreturn));

5
lib/libnetlink.c
View File

@ -27,7 +27,10 @@
void rtnl_close(struct rtnl_handle *rth) void rtnl_close(struct rtnl_handle *rth)
{ {
close(rth->fd); if (rth->fd >= 0) {
close(rth->fd);
rth->fd = -1;
}
} }
int rtnl_open_byproto(struct rtnl_handle *rth, unsigned subscriptions, int rtnl_open_byproto(struct rtnl_handle *rth, unsigned subscriptions,