Breaks configfiles! Major refactoring of i3status, see below

We finally switched to libconfuse for a configuration file format
which does not require much work for the programmer nor for the user.
Plus, it avoids the Not-Invented-Here syndrome of yet another config
file format.

Furthermore, as a consequence of providing format strings for every
"module" (ipv6, wireless, …), we directly print the output and thus
we needed to drop support for wmii. This allowed us to get rid of
quite some complexity.

Documentation about the new configuration file and options will
follow. This commit is the beginning of what will be i3status v2.0.

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());
+}