1 files changed, 92 insertions, 0 deletions
diff --git a/src/print_wireless_info.c b/src/print_wireless_info.c
new file mode 100644
index 0000000..f7776c8
--- /dev/null
+++ b/src/print_wireless_info.c
@@ -0,0 +1,92 @@
+// vim:ts=8:expandtab
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+#include <limits.h>
+#include <iwlib.h>
+
+#include "i3status.h"
+
+static const char *get_wireless_essid(const char *interface) {
+        static char part[512];
+#ifdef LINUX
+        int skfd;
+        if ((skfd = iw_sockets_open()) < 0) {
+                perror("socket");
+                exit(-1);
+        }
+        struct wireless_config wcfg;
+        if (iw_get_basic_config(skfd, interface, &wcfg) >= 0)
+                snprintf(part, sizeof(part), "%s", wcfg.essid);
+        else part[0] = '\0';
+        (void)close(skfd);
+#else
+        part[0] = '\0';
+#endif
+        return part;
+}
+
+/*
+ * Just parses /proc/net/wireless looking for lines beginning with
+ * wlan_interface, extracting the quality of the link and adding the
+ * current IP address of wlan_interface.
+ *
+ */
+void print_wireless_info(const char *interface, const char *format_up, const char *format_down) {
+        char buf[1024];
+        int quality = -1;
+        char *interfaces;
+        const char *walk;
+        memset(buf, 0, sizeof(buf));
+
+        if (!slurp("/proc/net/wireless", buf, sizeof(buf)))
+                die("Could not open \"/proc/net/wireless\"\n");
+
+        interfaces = skip_character(buf, '\n', 1) + 1;
+        while ((interfaces = skip_character(interfaces, '\n', 1)+1) < buf+strlen(buf)) {
+                while (isspace((int)*interfaces))
+                        interfaces++;
+                if (!BEGINS_WITH(interfaces, interface))
+                        continue;
+                if (sscanf(interfaces, "%*[^:]: 0000 %d", &quality) != 1)
+                        continue;
+                break;
+        }
+
+        /* Interface could not be found */
+        if (quality == -1)
+                return;
+
+        if ((quality == UCHAR_MAX) || (quality == 0)) {
+                walk = format_down;
+                printf("%s", color("#FF0000"));
+        } else {
+                printf("%s", color("#00FF00"));
+                walk = format_up;
+        }
+
+        for (; *walk != '\0'; walk++) {
+                if (*walk != '%') {
+                        putchar(*walk);
+                        continue;
+                }
+
+                if (BEGINS_WITH(walk+1, "quality")) {
+                        (void)printf("%03d%%", quality);
+                        walk += strlen("quality");
+                }
+
+                if (BEGINS_WITH(walk+1, "essid")) {
+                        (void)printf("%s", get_wireless_essid(interface));
+                        walk += strlen("essid");
+                }
+
+                if (BEGINS_WITH(walk+1, "ip")) {
+                        (void)printf("%s", get_ip_addr(interface));
+                        walk += strlen("ip");
+                }
+        }
+
+        (void)printf("%s", endcolor());
+}