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cryptocheck: Add --quiet option

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The option can be used to suppress output if we only want to test the
return value of the command.

Also, mention this option in the documentation.

Signed-off-by: Michael Chang <mchang@suse.com>
Signed-off-by: Maxim Suhanov <dfirblog@gmail.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
This commit is contained in:
Michael Chang 2025-03-14 19:03:39 +08:00 committed by Daniel Kiper
parent dbc0eb5bd1
commit 73d1c959ea
3 changed files with 28 additions and 8 deletions
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4
docs/grub.texi
View File

@ -6743,12 +6743,14 @@ Alias for @code{hashsum --hash crc32 arg @dots{}}. See command @command{hashsum}
@node cryptocheck
@subsection cryptocheck
@deffn Command cryptocheck device
@deffn Command cryptocheck [ @option{--quiet} ] device
Check if a given diskfilter device is backed by encrypted devices
(@pxref{cryptomount} for additional information).
The command examines all backing devices, physical volumes, of a specified
logical volume, like LVM2, and fails when at least one of them is unencrypted.
The option @option{--quiet} can be given to suppress the output.
@end deffn
@node cryptomount

7
grub-core/commands/search.c
View File

@ -67,6 +67,9 @@ is_unencrypted_disk (grub_disk_t disk)
if (disk->dev->id == GRUB_DISK_DEVICE_DISKFILTER_ID)
{
char opt[] = "--quiet";
char *args[2];
cmd = grub_command_find ("cryptocheck");
if (cmd == NULL) /* No diskfilter module loaded for some reason. */
return true;
@ -77,7 +80,9 @@ is_unencrypted_disk (grub_disk_t disk)
return true;
grub_snprintf (disk_str, disk_str_len, "(%s)", disk->name);
res = cmd->func (cmd, 1, &disk_str);
args[0] = opt;
args[1] = disk_str;
res = cmd->func (cmd, 2, args);
grub_free (disk_str);
return (res != GRUB_ERR_NONE) ? true : false; /* GRUB_ERR_NONE for encrypted. */
}

17
grub-core/disk/diskfilter.c
View File

@ -1414,6 +1414,19 @@ grub_cmd_cryptocheck (grub_command_t cmd __attribute__ ((unused)),
int check_pvs_res;
int namelen;
int pvs_cnt;
int opt_quiet = 0;
if (argc == 2)
{
if (grub_strcmp (args[0], "--quiet") == 0)
{
opt_quiet = 1;
argc--;
args++;
}
else
return grub_error (GRUB_ERR_BAD_ARGUMENT, N_("unrecognized option: %s"), args[0]);
}
if (argc != 1)
return grub_error (GRUB_ERR_BAD_ARGUMENT, N_("disk name expected"));
@ -1436,7 +1449,7 @@ grub_cmd_cryptocheck (grub_command_t cmd __attribute__ ((unused)),
check_pvs_res = grub_diskfilter_check_pvs_encrypted (disk, &pvs_cnt);
grub_disk_close (disk);
if (!opt_quiet)
grub_printf ("%s is %sencrypted (%d pv%s examined)\n", &args[0][1],
(check_pvs_res == GRUB_ERR_NONE) ? "" : "un",
pvs_cnt,
@ -1468,7 +1481,7 @@ GRUB_MOD_INIT(diskfilter)
{
grub_disk_dev_register (&grub_diskfilter_dev);
cmd = grub_register_command ("cryptocheck", grub_cmd_cryptocheck,
N_("DEVICE"),
N_("[--quiet] DEVICE"),
N_("Check if a logical volume resides on encrypted disks."));
}