grub2/include/grub/emu/hostfile.h
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

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C

/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2013 Free Software Foundation, Inc.
*
* GRUB is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* GRUB is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef GRUB_HOSTFILE_EMU_HEADER
#define GRUB_HOSTFILE_EMU_HEADER 1
#include <grub/disk.h>
#include <grub/partition.h>
#include <sys/types.h>
#include <grub/osdep/hostfile.h>
int
grub_util_is_directory (const char *path);
int
grub_util_is_special_file (const char *path);
int
grub_util_is_regular (const char *path);
char *
grub_util_path_concat (size_t n, ...);
char *
grub_util_path_concat_ext (size_t n, ...);
int
grub_util_fd_seek (grub_util_fd_t fd, grub_uint64_t off);
ssize_t
EXPORT_FUNC(grub_util_fd_read) (grub_util_fd_t fd, char *buf, size_t len);
ssize_t
EXPORT_FUNC(grub_util_fd_write) (grub_util_fd_t fd, const char *buf, size_t len);
grub_util_fd_t
EXPORT_FUNC(grub_util_fd_open) (const char *os_dev, int flags);
const char *
EXPORT_FUNC(grub_util_fd_strerror) (void);
int
grub_util_fd_sync (grub_util_fd_t fd);
void
grub_util_disable_fd_syncs (void);
int
EXPORT_FUNC(grub_util_fd_close) (grub_util_fd_t fd);
grub_uint64_t
grub_util_get_fd_size (grub_util_fd_t fd, const char *name, unsigned *log_secsize);
char *
grub_util_make_temporary_file (void);
char *
grub_util_make_temporary_dir (void);
void
grub_util_unlink_recursive (const char *name);
grub_uint32_t
grub_util_get_mtime (const char *name);
#endif /* ! GRUB_BIOSDISK_MACHINE_UTIL_HEADER */