From 7fa8c4b9a954647db79f79b78b33d79c00acd250 Mon Sep 17 00:00:00 2001
From: Michael Stapelberg <michael+x200@stapelberg.de>
Date: Tue, 7 Oct 2008 11:45:52 +0200
Subject: [PATCH] Write information in separate files, define order

wmii will show them with little border between, better than the previous
method, where an ascii bar was shown
---
 config.h     |  9 +++++++-
 wmiistatus.c | 63 +++++++++++++++++++++++++++++++++++++++++++---------
 wmiistatus.h |  4 +++-
 3 files changed, 64 insertions(+), 12 deletions(-)

diff --git a/config.h b/config.h
index baaa240..8b4f01e 100644
--- a/config.h
+++ b/config.h
@@ -1,7 +1,14 @@
 const char *wlan_interface = "wlan0";
 const char *eth_interface = "eth0";
-const char *wmii_path = "/mnt/wmii/rbar/status";
+/* wmii_path has to be terminated by slash */
+const char *wmii_path = "/mnt/wmii/rbar/";
 const char *time_format = "%d.%m.%Y %H:%M:%S";
 const char *battery = "/sys/class/power_supply/BAT0/uevent";
 const char *run_watches[] = {"DHCP", "/var/run/dhclient.pid",
 			     "VPN", "/var/run/vpnc*.pid"};
+
+#define ORDER_WLAN 	"0"
+#define ORDER_ETH 	"1"
+#define ORDER_BATTERY 	"2"
+#define ORDER_LOAD 	"3"
+#define ORDER_TIME 	"4"
diff --git a/wmiistatus.c b/wmiistatus.c
index bdb1e6a..c26781a 100644
--- a/wmiistatus.c
+++ b/wmiistatus.c
@@ -48,18 +48,55 @@
 #include <netinet/in.h>
 #include <arpa/inet.h>
 #include <glob.h>
+#include <dirent.h>
 
 #include "wmiistatus.h"
 #include "config.h"
 
-static void write_to_statusbar(const char *message) {
-	int fd = open(wmii_path, O_RDWR);
+static void cleanup_rbar_dir() {
+	struct dirent *ent;
+	DIR *dir;
+	char pathbuf[strlen(wmii_path)+256+1];
+
+	if ((dir = opendir(wmii_path)) == NULL)
+		exit(-3);
+
+	while ((ent = readdir(dir)) != NULL) {
+		if (ent->d_type == DT_REG) {
+			sprintf(pathbuf, "%s%s", wmii_path, ent->d_name);
+			unlink(pathbuf);
+		}
+	}
+
+	closedir(dir);
+}
+
+static void create_file(const char *name) {
+	char pathbuf[strlen(wmii_path)+256+1];
+
+	sprintf(pathbuf, "%s%s", wmii_path, name);
+	int fd = creat(pathbuf, S_IRUSR | S_IWUSR);
+	if (fd < 0)
+		exit(-4);
+	close(fd);
+}
+
+static void write_to_statusbar(const char *name, const char *message) {
+	char pathbuf[strlen(wmii_path)+256+1];
+
+	sprintf(pathbuf, "%s%s", wmii_path, name);
+	int fd = open(pathbuf, O_RDWR);
 	if (fd == -1)
 		exit(-2);
 	write(fd, message, strlen(message));
 	close(fd);
 }
 
+static void write_error_to_statusbar(const char *message) {
+	cleanup_rbar_dir();
+	write_to_statusbar("error", message);
+}
+
 /*
  * Write errormessage to statusbar and exit
  *
@@ -71,7 +108,7 @@ static void die(const char *fmt, ...) {
 	vsprintf(buffer, fmt, ap);
 	va_end(ap);
 
-	write_to_statusbar(buffer);
+	write_error_to_statusbar(buffer);
 	exit(-1);
 }
 
@@ -277,6 +314,13 @@ int main(void) {
 	     *end;
 	unsigned int i;
 
+	cleanup_rbar_dir();
+	create_file(ORDER_WLAN "wlan");
+	create_file(ORDER_ETH "eth");
+	create_file(ORDER_BATTERY "battery");
+	create_file(ORDER_LOAD "load");
+	create_file(ORDER_TIME "time");
+
 	while (1) {
 		memset(output, '\0', sizeof(output));
 		first_push = true;
@@ -287,13 +331,13 @@ int main(void) {
 		}
 
 		char *wireless_info = get_wireless_info();
-		push_part(wireless_info, strlen(wireless_info));
+		write_to_statusbar(ORDER_WLAN "wlan", wireless_info);
 
 		char *eth_info = get_eth_info();
-		push_part(eth_info, strlen(eth_info));
+		write_to_statusbar(ORDER_ETH "eth", eth_info);
 
 		char *battery_info = get_battery_info();
-		push_part(battery_info, strlen(battery_info));
+		write_to_statusbar(ORDER_BATTERY "battery", battery_info);
 
 		/* Get load */
 		int load_avg = open("/proc/loadavg", O_RDONLY);
@@ -302,15 +346,14 @@ int main(void) {
 		read(load_avg, part, sizeof(part));
 		close(load_avg);
 		end = skip_character(part, ' ', 3);
-		push_part(part, (end-part));
+		*end = '\0';
+		write_to_statusbar(ORDER_LOAD "load", part);
 
 		/* Get date & time */
 		time_t current_time = time(NULL);
 		struct tm *current_tm = localtime(&current_time);
 		strftime(part, sizeof(part), time_format, current_tm);
-		push_part(part, strlen(part));
-
-		write_to_statusbar(output);
+		write_to_statusbar(ORDER_TIME "time", part);
 
 		sleep(1);
 	}
diff --git a/wmiistatus.h b/wmiistatus.h
index 1e7f59f..9836dff 100644
--- a/wmiistatus.h
+++ b/wmiistatus.h
@@ -5,7 +5,9 @@ static bool first_push = true;
 
 typedef enum { CS_DISCHARGING, CS_CHARGING, CS_FULL } charging_status_t;
 
-static void write_to_statusbar(const char *message);
+static void cleanup_rbar_dir(void);
+static void write_to_statusbar(const char *name, const char *message);
+static void write_error_to_statusbar(const char *message);
 static void die(const char *fmt, ...);
 static char *skip_character(char *input, char character, int amount);
 static void push_part(const char *input, const int n);
-- 
2.39.5