libs/newlib-cygwin
libs
/
newlib-cygwin
mirror of git://sourceware.org/git/newlib-cygwin.git
4
0
Fork 0
Code Issues Projects Releases Wiki Activity

Cygwin: Fix access to block devices below /proc/sys. 

Use fhandler_dev_floppy instead of fhandler_procsys for such devices.
The read()/write() functions from fhandler_procsys do not ensure
sector aligned transfers and lseek() fails always.

Signed-off-by: Christian Franke <franke@computer.org>
This commit is contained in:
Christian Franke 2020-11-28 22:09:23 +01:00 committed by Corinna Vinschen
parent 7fa8405d3f
commit 3434d35a64
1 changed files with 19 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

29
winsup/cygwin/path.cc
View File

@ -863,19 +863,28 @@ path_conv::check (const char *src, unsigned opt,
dev.parse (FH_FS);
goto is_fs_via_procsys;
case virt_blk:
/* Block special device. If the trailing slash has been
requested, the target is the root directory of the
filesystem on this block device. So we convert this
to a real file and attach the backslash. */
if (component == 0 && need_directory)
/* Block special device. Convert to a /dev/sd* like
block device unless the trailing slash has been
requested. In this case, the target is the root
directory of the filesystem on this block device.
So we convert this to a real file and attach the
backslash. */
if (component == 0)
{
dev.parse (FH_FS);
strcat (full_path, "\\");
fileattr = FILE_ATTRIBUTE_DIRECTORY
| FILE_ATTRIBUTE_DEVICE;
fileattr = FILE_ATTRIBUTE_DEVICE;
if (!need_directory)
/* Use a /dev/sd* device number > /dev/sddx.
FIXME: Define a new major DEV_ice number. */
dev.parse (DEV_SD_HIGHPART_END, 9999);
else
{
dev.parse (FH_FS);
strcat (full_path, "\\");
fileattr |= FILE_ATTRIBUTE_DIRECTORY;
}
goto out;
}
fallthrough;
break;
case virt_chr:
if (component == 0)
fileattr = FILE_ATTRIBUTE_DEVICE;