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system/helpers.cpp: add code to get hdd standby/active status and flush hdd buffers

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Origin commit data
------------------
Branch: ni/coolstream
Commit: 097e05c083
Author: [CST] Focus <focus.cst@gmail.com>
Date: 2014-02-05 (Wed, 05 Feb 2014)


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This commit was generated by Migit
This commit is contained in:
[CST] Focus
2014-02-05 13:08:03 +04:00
parent 920ee0fdf2
commit 9a9cac4674
2 changed files with 76 additions and 0 deletions
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73
src/system/helpers.cpp
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@@ -38,6 +38,9 @@
#include <fcntl.h>
#include <dirent.h>
#include <stdarg.h>
#include <mntent.h>
#include <linux/hdreg.h>
#include <linux/fs.h>
#include <system/helpers.h>
#include <gui/update_ext.h>
@@ -611,3 +614,73 @@ bool CFileHelpers::removeDir(const char *Dir)
errno = 0;
return true;
}
static int hdd_open_dev(const char * fname)
{
FILE * fp;
struct mntent * mnt;
dev_t dev;
struct stat st;
int fd = -1;
if (stat(fname, &st) != 0) {
perror(fname);
return fd;
}
dev = st.st_dev;
fp = setmntent("/proc/mounts", "r");
if (fp == NULL) {
perror("setmntent");
return fd;
}
while ((mnt = getmntent(fp)) != NULL) {
if (stat(mnt->mnt_fsname, &st) != 0)
continue;
if (S_ISBLK(st.st_mode) && st.st_rdev == dev) {
printf("[hdd] file [%s] -> dev [%s]\n", fname, mnt->mnt_fsname);
fd = open(mnt->mnt_fsname, O_RDONLY|O_NONBLOCK);
if (fd < 0)
perror(mnt->mnt_fsname);
break;
}
}
endmntent(fp);
return fd;
}
bool hdd_get_standby(const char * fname)
{
bool standby = false;
int fd = hdd_open_dev(fname);
if (fd >= 0) {
unsigned char args[4] = {WIN_CHECKPOWERMODE1,0,0,0};
int ret = ioctl(fd, HDIO_DRIVE_CMD, args);
if (ret) {
args[0] = WIN_CHECKPOWERMODE2;
ret = ioctl(fd, HDIO_DRIVE_CMD, args);
}
if ((ret == 0) && (args[2] != 0xFF))
standby = true;
printf("[hdd] %s\n", standby ? "standby" : "active");
close(fd);
}
return standby;
}
void hdd_flush(const char * fname)
{
int fd = hdd_open_dev(fname);
if (fd >= 0) {
printf("[hdd] flush buffers...\n");
fsync(fd);
if (ioctl(fd, BLKFLSBUF, NULL))
perror("BLKFLSBUF");
else
ioctl(fd, HDIO_DRIVE_CMD, NULL);
close(fd);
}
}