Consistent paramter naming for components

[slstatus.git] / components / wifi.c

diff --git a/components/wifi.c b/components/wifi.c
index 414d533..9de543b 100644 (file)
--- a/components/wifi.c
+++ b/components/wifi.c
@@ -1,5 +1,4 @@
 /* See LICENSE file for copyright and license details. */
-#include <errno.h>
 #include <ifaddrs.h>
 #include <stdio.h>
 #include <string.h>
@@ -14,7 +13,7 @@
        #include <linux/wireless.h>
 
        const char *
-       wifi_perc(const char *iface)
+       wifi_perc(const char *interface)
        {
                int i, cur;
                int total = 70; /* the max of /proc/net/wireless */
@@ -23,11 +22,13 @@
                char status[5];
                FILE *fp;
 
-               snprintf(path, sizeof(path), "%s%s%s", "/sys/class/net/", iface,
-                        "/operstate");
+               if (esnprintf(path, sizeof(path),
+                             "/sys/class/net/%s/operstate",
+                             interface) < 0) {
+                       return NULL;
+               }
                if (!(fp = fopen(path, "r"))) {
-                       fprintf(stderr, "fopen '%s': %s\n", path,
-                               strerror(errno));
+                       warn("fopen '%s':", path);
                        return NULL;
                }
                p = fgets(status, 5, fp);
@@ -37,8 +38,7 @@
                }
 
                if (!(fp = fopen("/proc/net/wireless", "r"))) {
-                       fprintf(stderr, "fopen '/proc/net/wireless': %s\n",
-                               strerror(errno));
+                       warn("fopen '/proc/net/wireless':");
                        return NULL;
                }
 
@@ -51,11 +51,11 @@
                        return NULL;
                }
 
-               if (!(datastart = strstr(buf, iface))) {
+               if (!(datastart = strstr(buf, interface))) {
                        return NULL;
                }
 
-               datastart = (datastart+(strlen(iface)+1));
+               datastart = (datastart+(strlen(interface)+1));
                sscanf(datastart + 1, " %*d   %d  %*d  %*d\t\t  %*d\t   "
                       "%*d\t\t%*d\t\t %*d\t  %*d\t\t %*d", &cur);
 
@@ -63,7 +63,7 @@
        }
 
        const char *
-       wifi_essid(const char *iface)
+       wifi_essid(const char *interface)
        {
                static char id[IW_ESSID_MAX_SIZE+1];
                int sockfd;
@@ -71,16 +71,18 @@
 
                memset(&wreq, 0, sizeof(struct iwreq));
                wreq.u.essid.length = IW_ESSID_MAX_SIZE+1;
-               snprintf(wreq.ifr_name, sizeof(wreq.ifr_name), "%s", iface);
+               if (esnprintf(wreq.ifr_name, sizeof(wreq.ifr_name),
+                             "%s", interface) < 0) {
+                       return NULL;
+               }
 
                if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
-                       fprintf(stderr, "socket 'AF_INET': %s\n",
-                               strerror(errno));
+                       warn("socket 'AF_INET':");
                        return NULL;
                }
                wreq.u.essid.pointer = id;
                if (ioctl(sockfd,SIOCGIWESSID, &wreq) < 0) {
-                       fprintf(stderr, "ioctl 'SIOCGIWESSID': %s\n", strerror(errno));
+                       warn("ioctl 'SIOCGIWESSID':");
                        close(sockfd);
                        return NULL;
                }
@@ -103,30 +105,34 @@
        #include <sys/types.h>
 
        static int
-       load_ieee80211_nodereq(const char *iface, struct ieee80211_nodereq *nr)
+       load_ieee80211_nodereq(const char *interface, struct ieee80211_nodereq *nr)
        {
                struct ieee80211_bssid bssid;
                int sockfd;
+               uint8_t zero_bssid[IEEE80211_ADDR_LEN];
 
                memset(&bssid, 0, sizeof(bssid));
                memset(nr, 0, sizeof(struct ieee80211_nodereq));
                if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
-                       fprintf(stderr, "socket 'AF_INET': %s\n",
-                               strerror(errno));
+                       warn("socket 'AF_INET':");
                        return 0;
                }
-               strlcpy(bssid.i_name, iface, sizeof(bssid.i_name));
+               strlcpy(bssid.i_name, interface, sizeof(bssid.i_name));
                if ((ioctl(sockfd, SIOCG80211BSSID, &bssid)) < 0) {
-                       fprintf(stderr, "ioctl 'SIOCG80211BSSID': %s\n",
-                               strerror(errno));
+                       warn("ioctl 'SIOCG80211BSSID':");
+                       close(sockfd);
+                       return 0;
+               }
+               memset(&zero_bssid, 0, sizeof(zero_bssid));
+               if (memcmp(bssid.i_bssid, zero_bssid,
+                   IEEE80211_ADDR_LEN) == 0) {
                        close(sockfd);
                        return 0;
                }
-               strlcpy(nr->nr_ifname, iface, sizeof(nr->nr_ifname));
+               strlcpy(nr->nr_ifname, interface, sizeof(nr->nr_ifname));
                memcpy(&nr->nr_macaddr, bssid.i_bssid, sizeof(nr->nr_macaddr));
                if ((ioctl(sockfd, SIOCG80211NODE, nr)) < 0 && nr->nr_rssi) {
-                       fprintf(stderr, "ioctl 'SIOCG80211NODE': %s\n",
-                               strerror(errno));
+                       warn("ioctl 'SIOCG80211NODE':");
                        close(sockfd);
                        return 0;
                }
@@ -135,12 +141,12 @@
        }
 
        const char *
-       wifi_perc(const char *iface)
+       wifi_perc(const char *interface)
        {
                struct ieee80211_nodereq nr;
                int q;
 
-               if (load_ieee80211_nodereq(iface, &nr)) {
+               if (load_ieee80211_nodereq(interface, &nr)) {
                        if (nr.nr_max_rssi) {
                                q = IEEE80211_NODEREQ_RSSI(&nr);
                        } else {
@@ -154,11 +160,11 @@
        }
 
        const char *
-       wifi_essid(const char *iface)
+       wifi_essid(const char *interface)
        {
                struct ieee80211_nodereq nr;
 
-               if (load_ieee80211_nodereq(iface, &nr)) {
+               if (load_ieee80211_nodereq(interface, &nr)) {
                        return bprintf("%s", nr.nr_nwid);
                }