From 6b0c635ce896fb81f4b3138d8c22b879c7a9988f Mon Sep 17 00:00:00 2001 From: Michael Stapelberg Date: Thu, 30 Apr 2009 19:46:12 +0200 Subject: Fix display of IP addresses (display "no IP" correctly) --- i3status.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) (limited to 'i3status.c') diff --git a/i3status.c b/i3status.c index cb56373..a0415d3 100644 --- a/i3status.c +++ b/i3status.c @@ -360,10 +360,17 @@ static const char *get_ip_address(const char *interface) { socklen_t len = sizeof(struct sockaddr_in); memset(part, 0, sizeof(part)); + /* First check if the interface is running */ + (void)strcpy(ifr.ifr_name, interface); + if (ioctl(general_socket, SIOCGIFFLAGS, &ifr) < 0 || + !(ifr.ifr_flags & IFF_RUNNING)) + return NULL; + + /* Interface is up, get the IP address */ (void)strcpy(ifr.ifr_name, interface); ifr.ifr_addr.sa_family = AF_INET; if (ioctl(general_socket, SIOCGIFADDR, &ifr) < 0) - return NULL; + return "no IP"; memcpy(&addr, &ifr.ifr_addr, len); (void)inet_ntop(AF_INET, &addr.sin_addr.s_addr, part, len); -- cgit v1.2.3