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2007-08-13 Dan Williams <dcbw@redhat.com>

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* src/dhcp-manager/nm-dhcp-manager.c
		- Stop any dhclient instance that might be already running for a
			particular interface before starting an NM spawned dhclient.  Fixes
			dhclient processes left over if NM crashes, stuff like that.



git-svn-id: http://svn-archive.gnome.org/svn/NetworkManager/trunk@2674 4912f4e0-d625-0410-9fb7-b9a5a253dbdc
This commit is contained in:
Dan Williams
2007-08-13 20:38:47 +00:00
parent 146a4374b0
commit 07db7f145d
2 changed files with 40 additions and 13 deletions
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46
src/dhcp-manager/nm-dhcp-manager.c
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@@ -81,6 +81,8 @@ static NMDHCPManager *nm_dhcp_manager_new (void);
static void nm_dhcp_manager_cancel_transaction_real (NMDHCPDevice *device, gboolean blocking);
static void stop_dhclient (const char * iface, const pid_t pid, gboolean blocking);
static char *
get_pidfile_for_iface (const char * iface)
{
@@ -626,6 +628,7 @@ dhclient_run (NMDHCPDevice *device, gchar *xtra_arg)
char * pidfile = NULL;
char * leasefile = NULL;
gboolean success = FALSE;
char * pid_contents = NULL;
/* Find dhclient */
dhclient_binary = dhclient_binary_paths;
@@ -652,7 +655,14 @@ dhclient_run (NMDHCPDevice *device, gchar *xtra_arg)
goto out;
}
// FIXME: look for existing pidfile and kill dhclient
/* Kill any existing dhclient bound to this interface */
if (g_file_get_contents (pidfile, &pid_contents, NULL, NULL)) {
unsigned long int tmp = strtoul (pid_contents, NULL, 10);
if (!((tmp == ULONG_MAX) && (errno == ERANGE)))
stop_dhclient (device->iface, (pid_t) tmp, TRUE);
remove (pidfile);
}
dhclient_argv = g_ptr_array_new ();
g_ptr_array_add (dhclient_argv, (gpointer) (*dhclient_binary));
@@ -691,6 +701,7 @@ dhclient_run (NMDHCPDevice *device, gchar *xtra_arg)
success = TRUE;
out:
g_free (pid_contents);
g_free (leasefile);
g_free (pidfile);
g_ptr_array_free (dhclient_argv, TRUE);
@@ -735,22 +746,19 @@ nm_dhcp_manager_begin_transaction (NMDHCPManager *manager,
}
static void
nm_dhcp_manager_cancel_transaction_real (NMDHCPDevice *device, gboolean blocking)
stop_dhclient (const char * iface,
pid_t pid,
gboolean blocking)
{
int i = 20; /* 4 seconds */
char * pidfile;
char * leasefile;
if (!device->dhclient_pid)
return;
/* Tell it to quit */
kill (pid, SIGTERM);
kill (device->dhclient_pid, SIGTERM);
/* Yes, the state has to reach DHC_END. */
while (blocking && i-- > 0) {
gint child_status;
int ret;
ret = waitpid (device->dhclient_pid, &child_status, WNOHANG);
ret = waitpid (pid, &child_status, WNOHANG);
if (ret > 0) {
break;
} else if (ret == -1) {
@@ -765,10 +773,22 @@ nm_dhcp_manager_cancel_transaction_real (NMDHCPDevice *device, gboolean blocking
}
if (i <= 0) {
nm_warning ("%s: dhclient pid %d didn't exit, will kill it.",
device->iface, device->dhclient_pid);
kill (device->dhclient_pid, SIGKILL);
nm_warning ("%s: dhclient pid %d didn't exit, will kill it.", iface, pid);
kill (pid, SIGKILL);
}
}
static void
nm_dhcp_manager_cancel_transaction_real (NMDHCPDevice *device, gboolean blocking)
{
char * pidfile;
char * leasefile;
if (!device->dhclient_pid)
return;
stop_dhclient (device->iface, device->dhclient_pid, blocking);
nm_info ("%s: canceled DHCP transaction, dhclient pid %d",
device->iface,
device->dhclient_pid);