1 /* Disk protection for HP machines.
3 * Copyright 2008 Eric Piel
4 * Copyright 2009 Pavel Machek <pavel@suse.cz>
14 #include <sys/types.h>
20 void write_int(char *path, int i)
23 int fd = open(path, O_RDWR);
28 sprintf(buf, "%d", i);
29 if (write(fd, buf, strlen(buf)) != strlen(buf)) {
38 write_int("/sys/class/leds/hp::hddprotect/brightness", on);
41 void protect(int seconds)
43 write_int("/sys/block/sda/device/unload_heads", seconds*1000);
48 // /sys/class/power_supply/AC0/online
53 // /proc/acpi/button/lid/LID/state
63 int main(int argc, char* argv[])
67 fd = open("/dev/freefall", O_RDONLY);
73 signal(SIGALRM, ignore_me);
78 ret = read(fd, &count, sizeof(count));
80 if ((ret == -1) && (errno == EINTR)) {
81 /* Alarm expired, time to unpark the heads */
85 if (ret != sizeof(count)) {
92 if (1 || on_ac() || lid_open()) {