fdisk: non-linux support (BLK* and HDIO_*)

BLK* and HDIO_* are not available on all platform. Work around this
in a few places.

[kzak@redhat.com: split the original patch to small patches]

Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Signed-off-by: Karel Zak <kzak@redhat.com>

6 files changed, 30 insertions, 4 deletions

diff --git a/fdisk/cfdisk.c b/fdisk/cfdisk.c
index 9d32a1908..300518d6e 100644
--- a/fdisk/cfdisk.c
+++ b/fdisk/cfdisk.c
@@ -1685,6 +1685,7 @@ fill_p_info(void) {
 	 clear_warning();
     }
 
+#ifdef BLKFLSBUF
     /* Blocks are visible in more than one way:
        e.g. as block on /dev/hda and as block on /dev/hda3
        By a bug in the Linux buffer cache, we will see the old
@@ -1694,6 +1695,7 @@ fill_p_info(void) {
        so this only plays a role if we want to show volume labels. */
     ioctl(fd, BLKFLSBUF);	/* ignore errors */
 				/* e.g. Permission Denied */
+#endif
 
     if (blkdev_get_sectors(fd, &llsectors) == -1)
 	    fatal(_("Cannot get disk size"), 3);
@@ -1903,10 +1905,12 @@ write_part_table(void) {
 	}
 
     if (is_bdev) {
+#ifdef BLKRRPART
 	 sync();
 	 sleep(2);
 	 if (!ioctl(fd,BLKRRPART))
 	      changed = TRUE;
+#endif
 	 sync();
 	 sleep(4);
 
diff --git a/fdisk/fdisk.c b/fdisk/fdisk.c
index 58b8bbdef..d3fb1ea96 100644
--- a/fdisk/fdisk.c
+++ b/fdisk/fdisk.c
@@ -2261,10 +2261,15 @@ reread_partition_table(int leave) {
 
 	i = fstat(fd, &statbuf);
 	if (i == 0 && S_ISBLK(statbuf.st_mode)) {
-		printf(_("Calling ioctl() to re-read partition table.\n"));
 		sync();
 		sleep(2);
+#ifdef BLKRRPART
+		printf(_("Calling ioctl() to re-read partition table.\n"));
 		i = ioctl(fd, BLKRRPART);
+#else
+		errno = ENOSYS;
+		i = 1;
+#endif
         }
 
 	if (i) {
diff --git a/fdisk/fdisksgilabel.c b/fdisk/fdisksgilabel.c
index 14b2d6102..9f87751d3 100644
--- a/fdisk/fdisksgilabel.c
+++ b/fdisk/fdisksgilabel.c
@@ -713,6 +713,7 @@ create_sgilabel(void)
 
 	res = blkdev_get_sectors(fd, &llsectors);
 
+#ifdef HDIO_GETGEO
 	if (!ioctl(fd, HDIO_GETGEO, &geometry)) {
 		heads = geometry.heads;
 		sectors = geometry.sectors;
@@ -733,6 +734,7 @@ create_sgilabel(void)
 				  " > 33.8 GB.\n"), disk_device, cylinders);
 		}
 	}
+#endif
 	for (i = 0; i < 4; i++) {
 		old[i].sysid = 0;
 		if (valid_part_table_flag(MBRbuffer)) {
diff --git a/fdisk/fdisksunlabel.c b/fdisk/fdisksunlabel.c
index f4e8671ef..e6f172564 100644
--- a/fdisk/fdisksunlabel.c
+++ b/fdisk/fdisksunlabel.c
@@ -212,6 +212,7 @@ void create_sunlabel(void)
 	res = blkdev_get_sectors(fd, &llsectors);
 	sec_fac = sector_size / 512;
 
+#ifdef HDIO_GETGEO
 	if (!ioctl(fd, HDIO_GETGEO, &geometry)) {
 	        heads = geometry.heads;
 	        sectors = geometry.sectors;
@@ -228,7 +229,9 @@ void create_sunlabel(void)
 				  "This value may be truncated for devices"
 				  " > 33.8 GB.\n"), disk_device, cylinders);
 		}
-	} else {
+	} else
+#endif
+	{
 	        heads = read_int(1,1,1024,0,_("Heads"));
 		sectors = read_int(1,1,1024,0,_("Sectors/track"));
 		cylinders = read_int(1,1,65535,0,_("Cylinders"));
diff --git a/fdisk/gpt.c b/fdisk/gpt.c
index 2c96b0262..8cdf57f59 100644
--- a/fdisk/gpt.c
+++ b/fdisk/gpt.c
@@ -131,6 +131,7 @@ last_lba(int fd)
 	return sectors - 1;
 }
 
+#ifdef __linux__
 static ssize_t
 read_lastoddsector(int fd, uint64_t lba, void *buffer, size_t count)
 {
@@ -148,6 +149,7 @@ read_lastoddsector(int fd, uint64_t lba, void *buffer, size_t count)
 
         return !rc;
 }
+#endif
 
 static ssize_t
 read_lba(int fd, uint64_t lba, void *buffer, size_t bytes)
@@ -159,6 +161,7 @@ read_lba(int fd, uint64_t lba, void *buffer, size_t bytes)
 	lseek(fd, offset, SEEK_SET);
 	bytesread = read(fd, buffer, bytes);
 
+#ifdef __linux__
         /* Kludge.  This is necessary to read/write the last
            block of an odd-sized disk, until Linux 2.5.x kernel fixes.
            This is only used by gpt.c, and only to read
@@ -166,6 +169,7 @@ read_lba(int fd, uint64_t lba, void *buffer, size_t bytes)
         */
         if (!bytesread && !(last_lba(fd) & 1) && lba == last_lba(fd))
                 bytesread = read_lastoddsector(fd, lba, buffer, bytes);
+#endif
         return bytesread;
 }
 
diff --git a/fdisk/sfdisk.c b/fdisk/sfdisk.c
index d737d69d1..f70b1629c 100644
--- a/fdisk/sfdisk.c
+++ b/fdisk/sfdisk.c
@@ -446,7 +446,10 @@ get_geometry(char *dev, int fd, int silent) {
     unsigned long long sectors;
     struct geometry R;
 
-    if (ioctl(fd, HDIO_GETGEO, &g)) {
+#ifdef HDIO_GETGEO
+    if (ioctl(fd, HDIO_GETGEO, &g))
+#endif
+    {
 	g.heads = g.sectors = g.cylinders = g.start = 0;
 	if (!silent)
 	    do_warn(_("Disk %s: cannot get geometry\n"), dev);
@@ -790,7 +793,12 @@ add_sector_and_offset(struct disk_desc *z) {
 /* tell the kernel to reread the partition tables */
 static int
 reread_ioctl(int fd) {
-    if (ioctl(fd, BLKRRPART)) {
+#ifdef BLKRRPART
+    if (ioctl(fd, BLKRRPART))
+#else
+    errno = ENOSYS;
+#endif
+    {
 	perror("BLKRRPART");
 
 	/* 2.6.8 returns EIO for a zero table */