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-rw-r--r--Documentation/laptops/freefall.c174
1 files changed, 0 insertions, 174 deletions
diff --git a/Documentation/laptops/freefall.c b/Documentation/laptops/freefall.c
deleted file mode 100644
index 5e44b20b1848..000000000000
--- a/Documentation/laptops/freefall.c
+++ /dev/null
@@ -1,174 +0,0 @@
-/* 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.
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <string.h>
-#include <stdint.h>
-#include <errno.h>
-#include <signal.h>
-#include <sys/mman.h>
-#include <sched.h>
-#include <syslog.h>
-
-static int noled;
-static char unload_heads_path[64];
-static char device_path[32];
-static const char app_name[] = "FREE FALL";
-
-static int set_unload_heads_path(char *device)
-{
- if (strlen(device) <= 5 || strncmp(device, "/dev/", 5) != 0)
- return -EINVAL;
- strncpy(device_path, device, sizeof(device_path) - 1);
-
- snprintf(unload_heads_path, sizeof(unload_heads_path) - 1,
- "/sys/block/%s/device/unload_heads", device+5);
- return 0;
-}
-
-static int valid_disk(void)
-{
- int fd = open(unload_heads_path, O_RDONLY);
-
- if (fd < 0) {
- perror(unload_heads_path);
- return 0;
- }
-
- close(fd);
- return 1;
-}
-
-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);
-}
-
-static void set_led(int on)
-{
- if (noled)
- return;
- write_int("/sys/class/leds/hp::hddprotect/brightness", on);
-}
-
-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);
-}
-
-static int on_ac(void)
-{
- /* /sys/class/power_supply/AC0/online */
- return 1;
-}
-
-static int lid_open(void)
-{
- /* /proc/acpi/button/lid/LID/state */
- return 1;
-}
-
-static void ignore_me(int signum)
-{
- protect(0);
- set_led(0);
-}
-
-int main(int argc, char **argv)
-{
- int fd, ret;
- struct stat st;
- struct sched_param param;
-
- if (argc == 1)
- ret = set_unload_heads_path("/dev/sda");
- else if (argc == 2)
- ret = set_unload_heads_path(argv[1]);
- else
- ret = -EINVAL;
-
- if (ret || !valid_disk()) {
- fprintf(stderr, "usage: %s <device> (default: /dev/sda)\n",
- argv[0]);
- exit(1);
- }
-
- fd = open("/dev/freefall", O_RDONLY);
- if (fd < 0) {
- perror("/dev/freefall");
- return EXIT_FAILURE;
- }
-
- 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);
-
- signal(SIGALRM, ignore_me);
-
- for (;;) {
- unsigned char count;
-
- ret = read(fd, &count, sizeof(count));
- alarm(0);
- if ((ret == -1) && (errno == EINTR)) {
- /* Alarm expired, time to unpark the heads */
- continue;
- }
-
- if (ret != sizeof(count)) {
- perror("read");
- break;
- }
-
- protect(21);
- set_led(1);
- if (1 || on_ac() || lid_open())
- alarm(2);
- else
- alarm(20);
- }
-
- closelog();
- close(fd);
- return EXIT_SUCCESS;
-}