#! /bin/sh /usr/share/dpatch/dpatch-run
# 67_init_hddown.dpatch by Sebastian Reichelt
#
# Make sure SATA disks are powered down as well as IDE disks.  This
# patch could use some more work to make it more dynamic when
# detecting SATA/SCSI disks.  Closes: #348172

@DPATCH@
--- sysvinit-2.86.ds1/src/hddown.c	2004-06-09 14:47:45.000000000 +0200
+++ sysvinit-2.86.ds1-new/src/hddown.c	2006-01-16 18:05:48.000000000 +0100
@@ -25,18 +25,17 @@
 /*
  *	Find all IDE disks through /proc.
  */
-static int find_idedisks(char **dev, int maxdev)
+static int find_idedisks(const char **dev, int maxdev, int *count)
 {
 	DIR *dd;
 	FILE *fp;
 	struct dirent *d;
 	char buf[256];
-	int i = 0;
 
 	if ((dd = opendir(PROC_IDE)) == NULL)
 		return -1;
 
-	while ((d = readdir(dd)) != NULL) {
+	while (*count < maxdev && (d = readdir(dd)) != NULL) {
 		if (strncmp(d->d_name, "hd", 2) != 0)
 			continue;
 		buf[0] = 0;
@@ -50,21 +49,58 @@
 		}
 		fclose(fp);
 		snprintf(buf, sizeof(buf), DEV_BASE "/%s", d->d_name);
-		dev[i++] = strdup(buf);
-		if (i >= maxdev)
-			break;
+		dev[(*count)++] = strdup(buf);
 	}
 	closedir(dd);
-	if (i < maxdev) dev[i] = NULL;
 
 	return 0;
 }
 
 /*
- *	Put an IDE disk in standby mode.
+ *	Find all SCSI/SATA disks.
+ */
+static int find_scsidisks(const char **dev, int maxdev, int *count)
+{
+	if (*count < maxdev) dev[(*count)++] = DEV_BASE "/sda";
+	if (*count < maxdev) dev[(*count)++] = DEV_BASE "/sdb";
+	if (*count < maxdev) dev[(*count)++] = DEV_BASE "/sdc";
+	if (*count < maxdev) dev[(*count)++] = DEV_BASE "/sdd";
+	if (*count < maxdev) dev[(*count)++] = DEV_BASE "/sde";
+	if (*count < maxdev) dev[(*count)++] = DEV_BASE "/sdf";
+	if (*count < maxdev) dev[(*count)++] = DEV_BASE "/sdg";
+	if (*count < maxdev) dev[(*count)++] = DEV_BASE "/sdh";
+
+	return 0;
+}
+
+/*
+ *	Open the device node of a disk.
+ */
+static int open_disk(const char *device)
+{
+	return open(device, O_RDWR);
+}
+
+/*
+ *	Open device nodes of all disks, and store the file descriptors in fds.
+ *	This has to be done in advance because accessing the device nodes
+ *	might cause a disk to spin back up.
+ */
+static int open_disks(const char **disks, int *fds, int count)
+{
+	int i;
+
+	for (i = 0; i < count; i++)
+		fds[i] = open_disk(disks[i]);
+
+	return 0;
+}
+
+/*
+ *	Put an IDE/SCSI/SATA disk in standby mode.
  *	Code stolen from hdparm.c
  */
-static int do_standby_idedisk(char *device)
+static int do_standby_disk(int fd)
 {
 #ifndef WIN_STANDBYNOW1
 #define WIN_STANDBYNOW1 0xE0
@@ -74,9 +110,8 @@
 #endif
 	unsigned char args1[4] = {WIN_STANDBYNOW1,0,0,0};
 	unsigned char args2[4] = {WIN_STANDBYNOW2,0,0,0};
-	int fd;
 
-	if ((fd = open(device, O_RDWR)) < 0)
+	if (fd < 0)
 		return -1;
 
 	if (ioctl(fd, HDIO_DRIVE_CMD, &args1) &&
@@ -87,22 +122,37 @@
 }
 
 /*
- *	First find all IDE disks, then put them in standby mode.
+ *	Put all specified disks in standby mode.
+ */
+static int do_standby_disks(const int *fds, int count)
+{
+	int i;
+
+	for (i = 0; i < count; i++)
+		do_standby_disk(fds[i]);
+
+	return 0;
+}
+
+/*
+ *	First find all IDE/SCSI/SATA disks, then put them in standby mode.
  *	This has the side-effect of flushing the writecache,
  *	which is exactly what we want on poweroff.
  */
 int hddown(void)
 {
-	char *disks[MAX_DISKS+1];
-	int i;
+	const char *disks[MAX_DISKS];
+	int fds[MAX_DISKS];
+	int count = 0;
+	int result1, result2;
 
-	if (find_idedisks(disks, MAX_DISKS) < 0)
-		return -1;
+	result1 = find_idedisks(disks, MAX_DISKS, &count);
+	result2 = find_scsidisks(disks, MAX_DISKS, &count);
 
-	for (i = 0; disks[i] && i < MAX_DISKS; i++)
-		do_standby_idedisk(disks[i]);
+	open_disks(disks, fds, count);
+	do_standby_disks(fds, count);
 
-	return 0;
+	return (result1 ? result1 : result2);
 }
 
 #else /* __linux__ */