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efi_loader: display RO attribute in printenv -e

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Let the 'printenv -e' command display the read only flag.
If the variable is time authenticated write the time stamp.

Avoid EFI_CALL() when calling SetVariable() and GetVariable().

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
This commit is contained in:
Heinrich Schuchardt 2020-06-24 19:55:13 +02:00
parent f2d2b3a11c
commit 2a79c352ca
1 changed files with 16 additions and 8 deletions
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24
cmd/nvedit_efi.c
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@ -9,11 +9,13 @@
#include <common.h>
#include <command.h>
#include <efi_loader.h>
#include <efi_variable.h>
#include <env.h>
#include <exports.h>
#include <hexdump.h>
#include <malloc.h>
#include <mapmem.h>
#include <rtc.h>
#include <uuid.h>
#include <linux/kernel.h>
@ -34,6 +36,7 @@ static const struct {
{EFI_VARIABLE_RUNTIME_ACCESS, "RT"},
{EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS, "AW"},
{EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS, "AT"},
{EFI_VARIABLE_READ_ONLY, "RO"},
};
static const struct {
@ -87,20 +90,22 @@ static void efi_dump_single_var(u16 *name, const efi_guid_t *guid, bool verbose)
{
u32 attributes;
u8 *data;
u64 time;
struct rtc_time tm;
efi_uintn_t size;
int count, i;
efi_status_t ret;
data = NULL;
size = 0;
ret = EFI_CALL(efi_get_variable(name, guid, &attributes, &size, data));
ret = efi_get_variable_int(name, guid, &attributes, &size, data, &time);
if (ret == EFI_BUFFER_TOO_SMALL) {
data = malloc(size);
if (!data)
goto out;
ret = EFI_CALL(efi_get_variable(name, guid, &attributes, &size,
data));
ret = efi_get_variable_int(name, guid, &attributes, &size,
data, &time);
}
if (ret == EFI_NOT_FOUND) {
printf("Error: \"%ls\" not defined\n", name);
@ -109,13 +114,16 @@ static void efi_dump_single_var(u16 *name, const efi_guid_t *guid, bool verbose)
if (ret != EFI_SUCCESS)
goto out;
printf("%ls:\n %s:", name, efi_guid_to_str(guid));
rtc_to_tm(time, &tm);
printf("%ls:\n %s:\n", name, efi_guid_to_str(guid));
if (attributes & EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS)
printf(" %04d-%02d-%02d %02d:%02d:%02d\n", tm.tm_year,
tm.tm_mon, tm.tm_mday, tm.tm_hour, tm.tm_min, tm.tm_sec);
printf(" ");
for (count = 0, i = 0; i < ARRAY_SIZE(efi_var_attrs); i++)
if (attributes & efi_var_attrs[i].mask) {
if (count)
putc('|');
else
putc(' ');
count++;
puts(efi_var_attrs[i].text);
}
@ -592,8 +600,8 @@ int do_env_set_efi(struct cmd_tbl *cmdtp, int flag, int argc,
p = var_name16;
utf8_utf16_strncpy(&p, var_name, len + 1);
ret = EFI_CALL(efi_set_variable(var_name16, &guid, attributes,
size, value));
ret = efi_set_variable_int(var_name16, &guid, attributes, size, value,
true);
unmap_sysmem(value);
if (ret == EFI_SUCCESS) {
ret = CMD_RET_SUCCESS;