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Implement efi-set and efi-unset

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This commit is contained in:
Warner Losh 2016-05-20 19:37:54 +00:00
parent 8f190a8c0e
commit d52a88fe7c
1 changed files with 67 additions and 3 deletions
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70
sys/boot/efi/loader/main.c
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@ -75,8 +75,23 @@ EFI_GUID inputid = SIMPLE_TEXT_INPUT_PROTOCOL;
static void efi_zfs_probe(void);
#endif
/*
* cpy8to16 copies a traditional C string into a CHAR16 string and
* 0 terminates it. len is the size of *dst in bytes.
*/
static void
cp16to8(const CHAR16 *src, char *dst, size_t len)
cpy8to16(const char *src, CHAR16 *dst, size_t len)
{
len <<= 1; /* Assume CHAR16 is 2 bytes */
while (len > 0 && *src) {
*dst++ = *src++;
len--;
}
*dst++ = (CHAR16)0;
}
static void
cpy16to8(const CHAR16 *src, char *dst, size_t len)
{
size_t i;
@ -256,14 +271,14 @@ main(int argc, CHAR16 *argv[])
if (i + 1 == argc) {
setenv("comconsole_speed", "115200", 1);
} else {
cp16to8(&argv[i + 1][0], var,
cpy16to8(&argv[i + 1][0], var,
sizeof(var));
setenv("comconsole_speedspeed", var, 1);
}
i++;
break;
} else {
cp16to8(&argv[i][j + 1], var,
cpy16to8(&argv[i][j + 1], var,
sizeof(var));
setenv("comconsole_speed", var, 1);
break;
@ -909,6 +924,32 @@ COMMAND_SET(efiset, "efi-set", "set EFI variables", command_efi_set);
static int
command_efi_set(int argc, char *argv[])
{
char *uuid, *var, *val;
CHAR16 wvar[128];
EFI_GUID guid;
uint32_t status;
EFI_STATUS err;
if (argc != 4) {
printf("efi-set uuid var new-value\n");
return (CMD_ERROR);
}
uuid = argv[1];
var = argv[2];
val = argv[3];
uuid_from_string(uuid, (uuid_t *)&guid, &status);
if (status != uuid_s_ok) {
printf("Invalid uuid %s\n", uuid);
return (CMD_ERROR);
}
cpy8to16(var, wvar, sizeof(wvar));
err = RS->SetVariable(wvar, &guid,
EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_RUNTIME_ACCESS,
strlen(val) + 1, val);
if (EFI_ERROR(err)) {
printf("Failed to set variable: error %d\n", EFI_ERROR_CODE(err));
return (CMD_ERROR);
}
return (CMD_OK);
}
@ -917,6 +958,29 @@ COMMAND_SET(efiunset, "efi-unset", "delete / unset EFI variables", command_efi_u
static int
command_efi_unset(int argc, char *argv[])
{
char *uuid, *var;
CHAR16 wvar[128];
EFI_GUID guid;
uint32_t status;
EFI_STATUS err;
if (argc != 3) {
printf("efi-unset uuid var\n");
return (CMD_ERROR);
}
uuid = argv[1];
var = argv[2];
uuid_from_string(uuid, (uuid_t *)&guid, &status);
if (status != uuid_s_ok) {
printf("Invalid uuid %s\n", uuid);
return (CMD_ERROR);
}
cpy8to16(var, wvar, sizeof(wvar));
err = RS->SetVariable(wvar, &guid, 0, 0, NULL);
if (EFI_ERROR(err)) {
printf("Failed to unset variable: error %d\n", EFI_ERROR_CODE(err));
return (CMD_ERROR);
}
return (CMD_OK);
}