diff options
Diffstat (limited to 'Documentation/laptops')
| -rw-r--r-- | Documentation/laptops/00-INDEX | 4 | ||||
| -rw-r--r-- | Documentation/laptops/freefall.c (renamed from Documentation/laptops/hpfall.c) | 59 |
2 files changed, 47 insertions, 16 deletions
diff --git a/Documentation/laptops/00-INDEX b/Documentation/laptops/00-INDEX index d13b9a9a9e00..d399ae1fc724 100644 --- a/Documentation/laptops/00-INDEX +++ b/Documentation/laptops/00-INDEX @@ -8,8 +8,8 @@ disk-shock-protection.txt - information on hard disk shock protection. dslm.c - Simple Disk Sleep Monitor program -hpfall.c - - (HP) laptop accelerometer program for disk protection. +freefall.c + - (HP/DELL) laptop accelerometer program for disk protection. laptop-mode.txt - how to conserve battery power using laptop-mode. sony-laptop.txt diff --git a/Documentation/laptops/hpfall.c b/Documentation/laptops/freefall.c index 67084321dab4..d4173186555c 100644 --- 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. */ @@ -18,25 +20,32 @@ #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); devname[sizeof(devname) - 1] = '\0'; + 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; @@ -46,43 +55,54 @@ 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); @@ -91,6 +111,7 @@ void ignore_me(void) int main(int argc, char **argv) { int fd, ret; + struct stat st; struct sched_param param; if (argc == 1) @@ -112,7 +133,16 @@ 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, ¶m); mlockall(MCL_CURRENT|MCL_FUTURE); @@ -142,6 +172,7 @@ int main(int argc, char **argv) alarm(20); } + closelog(); close(fd); return EXIT_SUCCESS; } |