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…and 'suspend' into release
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,101 @@ | ||
| /* Disk protection for HP machines. | ||
| * | ||
| * Copyright 2008 Eric Piel | ||
| * Copyright 2009 Pavel Machek <pavel@suse.cz> | ||
| * | ||
| * 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> | ||
|
|
||
| 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) | ||
| { | ||
| write_int("/sys/class/leds/hp::hddprotect/brightness", on); | ||
| } | ||
|
|
||
| void protect(int seconds) | ||
| { | ||
| write_int("/sys/block/sda/device/unload_heads", seconds*1000); | ||
| } | ||
|
|
||
| int on_ac(void) | ||
| { | ||
| // /sys/class/power_supply/AC0/online | ||
| } | ||
|
|
||
| int lid_open(void) | ||
| { | ||
| // /proc/acpi/button/lid/LID/state | ||
| } | ||
|
|
||
| void ignore_me(void) | ||
| { | ||
| protect(0); | ||
| set_led(0); | ||
|
|
||
| } | ||
|
|
||
| int main(int argc, char* argv[]) | ||
| { | ||
| int fd, ret; | ||
|
|
||
| fd = open("/dev/freefall", O_RDONLY); | ||
| if (fd < 0) { | ||
| perror("open"); | ||
| return EXIT_FAILURE; | ||
| } | ||
|
|
||
| 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); | ||
| } | ||
| } | ||
|
|
||
| close(fd); | ||
| return EXIT_SUCCESS; | ||
| } |
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