Merge branches 'acpi-scan' and 'acpi-video'

[karo-tx-linux.git] / Documentation / laptops / freefall.c

diff --git a/Documentation/laptops/hpfall.c b/Documentation/laptops/freefall.c
similarity index 64%
rename from Documentation/laptops/hpfall.c
rename to Documentation/laptops/freefall.c
index b85dbbac049933dd9dc6f6f45568f3725246f032..aab2ff09e86842aec48ba0d61b7972f4cae1f4c3 100644 (file)
--- a/Documentation/laptops/hpfall.c
+++ b/Documentation/laptops/freefall.c
@@ -1,7 +1,9 @@
-/* Disk protection for HP machines.
+/* Disk protection for HP/DELL machines.
  *
  * Copyright 2008 Eric Piel
  * Copyright 2009 Pavel Machek <pavel@ucw.cz>
+ * Copyright 2012 Sonal Santan
+ * Copyright 2014 Pali Rohár <pali.rohar@gmail.com>
  *
  * GPLv2.
  */
@@ -18,24 +20,31 @@
 #include <signal.h>
 #include <sys/mman.h>
 #include <sched.h>
+#include <syslog.h>
 
-char unload_heads_path[64];
+static int noled;
+static char unload_heads_path[64];
+static char device_path[32];
+static const char app_name[] = "FREE FALL";
 
-int set_unload_heads_path(char *device)
+static int set_unload_heads_path(char *device)
 {
        char devname[64];
 
        if (strlen(device) <= 5 || strncmp(device, "/dev/", 5) != 0)
                return -EINVAL;
-       strncpy(devname, device + 5, sizeof(devname));
+       strncpy(devname, device + 5, sizeof(devname) - 1);
+       strncpy(device_path, device, sizeof(device_path) - 1);
 
        snprintf(unload_heads_path, sizeof(unload_heads_path) - 1,
                                "/sys/block/%s/device/unload_heads", devname);
        return 0;
 }
-int valid_disk(void)
+
+static int valid_disk(void)
 {
        int fd = open(unload_heads_path, O_RDONLY);
+
        if (fd < 0) {
                perror(unload_heads_path);
                return 0;
@@ -45,43 +54,54 @@ int valid_disk(void)
        return 1;
 }
 
-void write_int(char *path, int i)
+static void write_int(char *path, int i)
 {
        char buf[1024];
        int fd = open(path, O_RDWR);
+
        if (fd < 0) {
                perror("open");
                exit(1);
        }
+
        sprintf(buf, "%d", i);
+
        if (write(fd, buf, strlen(buf)) != strlen(buf)) {
                perror("write");
                exit(1);
        }
+
        close(fd);
 }
 
-void set_led(int on)
+static void set_led(int on)
 {
+       if (noled)
+               return;
        write_int("/sys/class/leds/hp::hddprotect/brightness", on);
 }
 
-void protect(int seconds)
+static void protect(int seconds)
 {
+       const char *str = (seconds == 0) ? "Unparked" : "Parked";
+
        write_int(unload_heads_path, seconds*1000);
+       syslog(LOG_INFO, "%s %s disk head\n", str, device_path);
 }
 
-int on_ac(void)
+static int on_ac(void)
 {
-//     /sys/class/power_supply/AC0/online
+       /* /sys/class/power_supply/AC0/online */
+       return 1;
 }
 
-int lid_open(void)
+static int lid_open(void)
 {
-//     /proc/acpi/button/lid/LID/state
+       /* /proc/acpi/button/lid/LID/state */
+       return 1;
 }
 
-void ignore_me(void)
+static void ignore_me(int signum)
 {
        protect(0);
        set_led(0);
@@ -90,6 +110,7 @@ void ignore_me(void)
 int main(int argc, char **argv)
 {
        int fd, ret;
+       struct stat st;
        struct sched_param param;
 
        if (argc == 1)
@@ -111,7 +132,16 @@ int main(int argc, char **argv)
                return EXIT_FAILURE;
        }
 
-       daemon(0, 0);
+       if (stat("/sys/class/leds/hp::hddprotect/brightness", &st))
+               noled = 1;
+
+       if (daemon(0, 0) != 0) {
+               perror("daemon");
+               return EXIT_FAILURE;
+       }
+
+       openlog(app_name, LOG_CONS | LOG_PID | LOG_NDELAY, LOG_LOCAL1);
+
        param.sched_priority = sched_get_priority_max(SCHED_FIFO);
        sched_setscheduler(0, SCHED_FIFO, &param);
        mlockall(MCL_CURRENT|MCL_FUTURE);
@@ -141,6 +171,7 @@ int main(int argc, char **argv)
                        alarm(20);
        }
 
+       closelog();
        close(fd);
        return EXIT_SUCCESS;
 }