grub/grub-core/osdep/unix
Colin Watson 62daa27056 util: Detect more I/O errors
Many of GRUB's utilities don't check anywhere near all the possible
write errors.  For example, if grub-install runs out of space when
copying a file, it won't notice.  There were missing checks for the
return values of write, fflush, fsync, and close (or the equivalents on
other OSes), all of which must be checked.

I tried to be consistent with the existing logging practices of the
various hostdisk implementations, but they weren't entirely consistent
to start with so I used my judgement.  The result at least looks
reasonable on GNU/Linux when I provoke a write error:

  Installing for x86_64-efi platform.
  grub-install: error: cannot copy `/usr/lib/grub/x86_64-efi-signed/grubx64.efi.signed' to `/boot/efi/EFI/debian/grubx64.efi': No space left on device.

There are more missing checks in other utilities, but this should fix
the most critical ones.

Fixes Debian bug #922741.

Signed-off-by: Colin Watson <cjwatson@ubuntu.com>
Reviewed-by: Steve McIntyre <93sam@debian.org>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
2019-03-05 10:23:47 +01:00
..
compress.c Rewrite grub-install, grub-mkrescue, grub-mkstandalone and grub-mknetdir 2013-11-16 20:21:16 +01:00
config.c * grub-core/osdep/unix/config.c: Remove extraneous comma. 2014-09-21 17:49:13 +02:00
cputime.c unix/cputime.c: Cache sc_clk_tck and check it for sanity. 2015-01-21 17:42:15 +01:00
dl.c Move OS-dependent mprotect for module loading to grub-core/osdep/*/dl.c 2013-12-08 18:08:23 +01:00
emuconsole.c * grub-core/osdep/unix/emuconsole.c (put): Pacify the compiler on 2013-11-13 13:34:57 +00:00
exec.c unix exec: avoid atexit handlers when child exits 2017-08-30 15:20:13 +02:00
getroot.c grub-probe: Don't skip /dev/mapper/dm-* devices 2018-05-29 15:55:27 +02:00
hostdisk.c util: Detect more I/O errors 2019-03-05 10:23:47 +01:00
password.c unix: do not close stdin in grub_passwd_get 2015-11-18 22:23:58 +03:00
platform.c unix/platform: Initialize variable to fix grub-install on UEFI system 2018-11-09 13:34:16 +01:00
random.c Add a wrapper for fopen. On unix-like systems just pass-through. On 2013-10-13 20:36:28 +02:00
relpath.c unix/relpath: memory leak 2015-06-19 18:38:25 +03:00
sleep.c Move sleep routines to grub-core/osdep. 2013-10-08 17:38:46 +02:00