Patch from Dennis Vlasenko resetting values that get reused.
diff --git a/miscutils/hdparm.c b/miscutils/hdparm.c
index f237d32..f473add 100644
--- a/miscutils/hdparm.c
+++ b/miscutils/hdparm.c
@@ -1325,11 +1325,8 @@
}
if_printf((!(id->field_valid&1))," (maybe):");
-#if __BYTE_ORDER == __BIG_ENDIAN
- capacity = (id->cur_capacity0 << 16) | id->cur_capacity1;
-#else
- capacity = (id->cur_capacity1 << 16) | id->cur_capacity0;
-#endif
+ if (BB_BIG_ENDIAN) capacity = (id->cur_capacity0 << 16) | id->cur_capacity1;
+ else capacity = (id->cur_capacity1 << 16) | id->cur_capacity0;
printf(" CurCHS=%u/%u/%u, CurSects=%lu, LBA=%s",id->cur_cyls, id->cur_heads,
id->cur_sectors, capacity ,
((id->capability&2)==0)?"no":"yes");
@@ -1827,6 +1824,8 @@
#ifndef HDIO_DRIVE_CMD
int force_operation = 0;
#endif
+ /* Please restore args[n] to these values after each ioctl
+ except for args[2] */
unsigned char args[4] = {WIN_SETFEATURES,0,0,0};
fd = bb_xopen(devname, O_RDONLY|O_NONBLOCK);
@@ -1852,6 +1851,8 @@
args[1] = hwif_ctrl;
args[2] = hwif_irq;
bb_ioctl(fd, HDIO_SCAN_HWIF, args, "HDIO_SCAN_HWIF");
+ args[0] = WIN_SETFEATURES;
+ args[1] = 0;
}
#endif
if (set_piomode)
@@ -1921,8 +1922,10 @@
if (set_doorlock)
{
args[0] = doorlock ? WIN_DOORLOCK : WIN_DOORUNLOCK;
+ args[2] = 0;
if_printf_on_off(get_doorlock," setting drive doorlock to %ld", doorlock);
bb_ioctl(fd, HDIO_DRIVE_CMD, &args,"HDIO_DRIVE_CMD(doorlock)");
+ args[0] = WIN_SETFEATURES;
}
if (set_dkeep)
{
@@ -1943,6 +1946,7 @@
args[2] = 0xab;
if_printf(get_prefetch," setting drive prefetch to %ld\n", prefetch);
bb_ioctl(fd, HDIO_DRIVE_CMD, &args, "HDIO_DRIVE_CMD(setprefetch)");
+ args[1] = 0;
}
if (set_xfermode)
{
@@ -1954,6 +1958,7 @@
interpret_xfermode(xfermode_requested);
}
bb_ioctl(fd, HDIO_DRIVE_CMD, &args,"HDIO_DRIVE_CMD(setxfermode)");
+ args[1] = 0;
}
if (set_lookahead)
{
@@ -1980,6 +1985,7 @@
if_printf(get_apmmode," 0x%02lX (%ld)\n",apmmode,apmmode);
}
bb_ioctl(fd, HDIO_DRIVE_CMD, &args,"HDIO_DRIVE_CMD");
+ args[1] = 0;
}
if (set_wcache)
{
@@ -2001,6 +2007,11 @@
bb_ioctl(fd, HDIO_DRIVE_CMD, &flushcache, "HDIO_DRIVE_CMD(flushcache)");
#endif /* DO_FLUSHCACHE */
}
+
+ /* In code below, we do not preserve args[0], but the rest
+ is preserved, including args[2] */
+ args[2] = 0;
+
if (set_standbynow)
{
#ifndef WIN_STANDBYNOW1
@@ -2041,6 +2052,7 @@
interpret_standby(standby_requested);
}
bb_ioctl(fd, HDIO_DRIVE_CMD, &args, "HDIO_DRIVE_CMD(setidle1)");
+ args[1] = 0;
}
#else /* HDIO_DRIVE_CMD */
if (force_operation)
@@ -2173,6 +2185,7 @@
}
else
state = (args[2] == 255) ? "active/idle" : "standby";
+ args[1] = args[2] = 0;
printf(" drive state is: %s\n", state);
}