madwifi plugin: Unify ioctl error handling.

If an ioctl fails, a debug message is generated rather than an error message.
There are several types of interfaces manages by the madwifi driver, and not
all interfaces support all ioctls. Thanks to Ondrej for pointing this out.

diff --git a/src/madwifi.c b/src/madwifi.c
index f0230f9..e46420c 100644 (file)
--- a/src/madwifi.c
+++ b/src/madwifi.c
@@ -641,11 +641,20 @@ process_athstats (int sk, const char *dev)
 {
        struct ifreq ifr;
        struct ath_stats stats;
+       int status;
 
        sstrncpy (ifr.ifr_name, dev, sizeof (ifr.ifr_name));
        ifr.ifr_data = (void *) &stats;
-       if (ioctl (sk, SIOCGATHSTATS, &ifr) < 0)
+       status = ioctl (sk, SIOCGATHSTATS, &ifr);
+       if (status < 0)
+       {
+               /* Silent, because not all interfaces support all ioctls. */
+               DEBUG ("madwifi plugin: Sending IO-control "
+                               "SIOCGATHSTATS to device %s "
+                               "failed with status %i.",
+                               dev, status);
                return;
+       }
 
        /* These stats are handled as a special case, because they are
           eight values each */
@@ -667,10 +676,20 @@ process_80211stats (int sk, const char *dev)
 {
        struct ifreq ifr;
        struct ieee80211_stats stats;
+       int status;
+
        sstrncpy (ifr.ifr_name, dev, sizeof (ifr.ifr_name));
        ifr.ifr_data = (void *) &stats;
-       if (ioctl(sk, SIOCG80211STATS, &ifr) < 0)
+       status = ioctl(sk, SIOCG80211STATS, &ifr);
+       if (status < 0)
+       {
+               /* Silent, because not all interfaces support all ioctls. */
+               DEBUG ("madwifi plugin: Sending IO-control "
+                               "SIOCG80211STATS to device %s "
+                               "failed with status %i.",
+                               dev, status);
                return;
+       }
 
        process_stat_struct (IFA_STAT, &stats, dev, NULL, "ath_stat", "is_misc");
 }
@@ -683,6 +702,7 @@ process_station (int sk, const char *dev, struct ieee80211req_sta_info *si)
        static char mac[DATA_MAX_NAME_LEN];
        struct ieee80211req_sta_stats stats;
        const struct ieee80211_nodestats *ns = &stats.is_stats;
+       int status;
 
        macaddr_to_str (mac, sizeof (mac), si->isi_macaddr);
 
@@ -698,8 +718,16 @@ process_station (int sk, const char *dev, struct ieee80211req_sta_info *si)
        iwr.u.data.pointer = (void *) &stats;
        iwr.u.data.length = sizeof (stats);
        memcpy(stats.is_u.macaddr, si->isi_macaddr, IEEE80211_ADDR_LEN);
-       if (ioctl(sk, IEEE80211_IOCTL_STA_STATS, &iwr) < 0)
+       status = ioctl(sk, IEEE80211_IOCTL_STA_STATS, &iwr);
+       if (status < 0)
+       {
+               /* Silent, because not all interfaces support all ioctls. */
+               DEBUG ("madwifi plugin: Sending IO-control "
+                               "IEEE80211_IOCTL_STA_STATS to device %s "
+                               "failed with status %i.",
+                               dev, status);
                return;
+       }
 
        /* These two stats are handled as a special case as they are
           a pair of 64bit values */
@@ -734,7 +762,8 @@ process_stations (int sk, const char *dev)
        status = ioctl (sk, IEEE80211_IOCTL_STA_INFO, &iwr);
        if (status < 0)
        {
-               ERROR ("madwifi plugin: Sending IO-control "
+               /* Silent, because not all interfaces support all ioctls. */
+               DEBUG ("madwifi plugin: Sending IO-control "
                                "IEEE80211_IOCTL_STA_INFO to device %s "
                                "failed with status %i.",
                                dev, status);