Flush the output stream instead of arbitrarily disabling buffering

[slstatus.git] / components / wifi.c

diff --git a/components/wifi.c b/components/wifi.c
index 414d533..b3e1723 100644 (file)
--- a/components/wifi.c
+++ b/components/wifi.c
@@ -23,11 +23,13 @@
                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",
+                             iface) < 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 +39,7 @@
                }
 
                if (!(fp = fopen("/proc/net/wireless", "r"))) {
-                       fprintf(stderr, "fopen '/proc/net/wireless': %s\n",
-                               strerror(errno));
+                       warn("fopen '/proc/net/wireless':");
                        return NULL;
                }
 
@@ -71,16 +72,18 @@
 
                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", iface) < 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;
                }
@@ -111,22 +114,19 @@
                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));
                if ((ioctl(sockfd, SIOCG80211BSSID, &bssid)) < 0) {
-                       fprintf(stderr, "ioctl 'SIOCG80211BSSID': %s\n",
-                               strerror(errno));
+                       warn("ioctl 'SIOCG80211BSSID':");
                        close(sockfd);
                        return 0;
                }
                strlcpy(nr->nr_ifname, iface, 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;
                }