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wic: call os.ftruncate instead of running truncate 

Replaced running of truncate utility with the standard library
call os.ftruncate

(From OE-Core rev: 1ba6101ceaee354816e690d44bc9a5dd8dcf4011)

Signed-off-by: Ed Bartosh <ed.bartosh@linux.intel.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Ed Bartosh 2016-11-02 22:33:07 +02:00 committed by Richard Purdie
parent eb345ca720
commit c8669749e3
2 changed files with 13 additions and 7 deletions
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5
scripts/lib/wic/imager/direct.py
View File

@ -56,8 +56,9 @@ class DiskImage():
if self.created:
return
# create sparse disk image
cmd = "truncate %s -s %s" % (self.device, self.size)
exec_cmd(cmd)
with open(self.device, 'w') as sparse:
os.ftruncate(sparse.fileno(), self.size)
self.created = True
class DirectImageCreator(BaseImageCreator):

15
scripts/lib/wic/partition.py
View File

@ -217,7 +217,8 @@ class Partition():
msger.debug("Added %d extra blocks to %s to get to %d total blocks" % \
(extra_blocks, self.mountpoint, rootfs_size))
exec_cmd("truncate %s -s %d" % (rootfs, rootfs_size * 1024))
with open(rootfs, 'w') as sparse:
os.ftruncate(sparse.fileno(), rootfs_size * 1024)
extra_imagecmd = "-i 8192"
@ -250,7 +251,8 @@ class Partition():
msger.debug("Added %d extra blocks to %s to get to %d total blocks" % \
(extra_blocks, self.mountpoint, rootfs_size))
exec_cmd("truncate %s -s %d" % (rootfs, rootfs_size * 1024))
with open(rootfs, 'w') as sparse:
os.ftruncate(sparse.fileno(), rootfs_size * 1024)
label_str = ""
if self.label:
@ -305,7 +307,8 @@ class Partition():
"""
Prepare an empty ext2/3/4 partition.
"""
exec_cmd("truncate %s -s %d" % (rootfs, self.size * 1024))
with open(rootfs, 'w') as sparse:
os.ftruncate(sparse.fileno(), rootfs_size * 1024)
extra_imagecmd = "-i 8192"
@ -322,7 +325,8 @@ class Partition():
"""
Prepare an empty btrfs partition.
"""
exec_cmd("truncate %s -s %d" % (rootfs, self.size * 1024))
with open(rootfs, 'w') as sparse:
os.ftruncate(sparse.fileno(), rootfs_size * 1024)
label_str = ""
if self.label:
@ -383,7 +387,8 @@ class Partition():
"""
path = "%s/fs.%s" % (cr_workdir, self.fstype)
exec_cmd("truncate %s -s %d" % (path, self.size * 1024))
with open(path, 'w') as sparse:
os.ftruncate(sparse.fileno(), self.size * 1024)
import uuid
label_str = ""