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@@ -13,6 +13,7 @@
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#include <exports.h>
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#include <hexdump.h>
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#include <malloc.h>
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+#include <mapmem.h>
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#include <linux/kernel.h>
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/*
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@@ -34,15 +35,49 @@ static const struct {
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{EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS, "AT"},
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};
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+static const struct {
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+ efi_guid_t guid;
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+ char *text;
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+} efi_guid_text[] = {
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+ /* signature database */
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+ {EFI_GLOBAL_VARIABLE_GUID, "EFI_GLOBAL_VARIABLE_GUID"},
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+};
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+
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+/* "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx" */
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+static char unknown_guid[37];
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+
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+/**
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+ * efi_guid_to_str() - convert guid to readable name
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+ *
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+ * @guid: GUID
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+ * Return: string for GUID
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+ *
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+ * convert guid to readable name
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+ */
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+static const char *efi_guid_to_str(const efi_guid_t *guid)
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+{
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+ int i;
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+
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+ for (i = 0; i < ARRAY_SIZE(efi_guid_text); i++)
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+ if (!guidcmp(guid, &efi_guid_text[i].guid))
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+ return efi_guid_text[i].text;
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+
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+ uuid_bin_to_str((unsigned char *)guid->b, unknown_guid,
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+ UUID_STR_FORMAT_GUID);
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+
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+ return unknown_guid;
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+}
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+
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/**
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* efi_dump_single_var() - show information about a UEFI variable
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*
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* @name: Name of the variable
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* @guid: Vendor GUID
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+ * @verbose: if true, dump data
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*
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* Show information encoded in one UEFI variable
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*/
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-static void efi_dump_single_var(u16 *name, efi_guid_t *guid)
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+static void efi_dump_single_var(u16 *name, const efi_guid_t *guid, bool verbose)
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{
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u32 attributes;
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u8 *data;
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@@ -68,7 +103,7 @@ static void efi_dump_single_var(u16 *name, efi_guid_t *guid)
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if (ret != EFI_SUCCESS)
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goto out;
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- printf("%ls:", name);
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+ printf("%ls:\n %s:", name, efi_guid_to_str(guid));
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for (count = 0, i = 0; i < ARRAY_SIZE(efi_var_attrs); i++)
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if (attributes & efi_var_attrs[i].mask) {
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if (count)
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@@ -79,7 +114,9 @@ static void efi_dump_single_var(u16 *name, efi_guid_t *guid)
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puts(efi_var_attrs[i].text);
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}
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printf(", DataSize = 0x%zx\n", size);
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- print_hex_dump(" ", DUMP_PREFIX_OFFSET, 16, 1, data, size, true);
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+ if (verbose)
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+ print_hex_dump(" ", DUMP_PREFIX_OFFSET, 16, 1,
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+ data, size, true);
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out:
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free(data);
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@@ -90,11 +127,13 @@ out:
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*
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* @argc: Number of arguments (variables)
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* @argv: Argument (variable name) array
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+ * @verbose: if true, dump data
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* Return: CMD_RET_SUCCESS on success, or CMD_RET_RET_FAILURE
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*
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* Show information encoded in named UEFI variables
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*/
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-static int efi_dump_vars(int argc, char * const argv[])
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+static int efi_dump_vars(int argc, char * const argv[],
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+ const efi_guid_t *guid, bool verbose)
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{
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u16 *var_name16, *p;
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efi_uintn_t buf_size, size;
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@@ -119,8 +158,7 @@ static int efi_dump_vars(int argc, char * const argv[])
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p = var_name16;
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utf8_utf16_strcpy(&p, argv[0]);
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- efi_dump_single_var(var_name16,
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- (efi_guid_t *)&efi_global_variable_guid);
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+ efi_dump_single_var(var_name16, guid, verbose);
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}
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free(var_name16);
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@@ -128,20 +166,56 @@ static int efi_dump_vars(int argc, char * const argv[])
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return CMD_RET_SUCCESS;
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}
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+static bool match_name(int argc, char * const argv[], u16 *var_name16)
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+{
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+ char *buf, *p;
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+ size_t buflen;
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+ int i;
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+ bool result = false;
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+
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+ buflen = utf16_utf8_strlen(var_name16) + 1;
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+ buf = calloc(1, buflen);
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+ if (!buf)
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+ return result;
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+
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+ p = buf;
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+ utf16_utf8_strcpy(&p, var_name16);
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+
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+ for (i = 0; i < argc; argc--, argv++) {
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+ if (!strcmp(buf, argv[i])) {
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+ result = true;
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+ goto out;
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+ }
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+ }
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+
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+out:
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+ free(buf);
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+
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+ return result;
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+}
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+
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/**
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- * efi_dump_vars() - show information about all the UEFI variables
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+ * efi_dump_var_all() - show information about all the UEFI variables
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*
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+ * @argc: Number of arguments (variables)
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+ * @argv: Argument (variable name) array
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+ * @verbose: if true, dump data
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* Return: CMD_RET_SUCCESS on success, or CMD_RET_RET_FAILURE
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*
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* Show information encoded in all the UEFI variables
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*/
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-static int efi_dump_var_all(void)
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+static int efi_dump_var_all(int argc, char * const argv[],
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+ const efi_guid_t *guid_p, bool verbose)
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{
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u16 *var_name16, *p;
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efi_uintn_t buf_size, size;
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efi_guid_t guid;
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efi_status_t ret;
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+ if (argc && guid_p)
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+ /* simplified case */
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+ return efi_dump_vars(argc, argv, guid_p, verbose);
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+
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buf_size = 128;
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var_name16 = malloc(buf_size);
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if (!var_name16)
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@@ -171,7 +245,9 @@ static int efi_dump_var_all(void)
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return CMD_RET_FAILURE;
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}
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- efi_dump_single_var(var_name16, &guid);
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+ if ((!guid_p || !guidcmp(guid_p, &guid)) &&
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+ (!argc || match_name(argc, argv, var_name16)))
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+ efi_dump_single_var(var_name16, &guid, verbose);
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}
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free(var_name16);
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@@ -189,12 +265,15 @@ static int efi_dump_var_all(void)
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* Return: CMD_RET_SUCCESS on success, or CMD_RET_RET_FAILURE
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*
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* This function is for "env print -e" or "printenv -e" command:
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- * => env print -e [var [...]]
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+ * => env print -e [-n] [-guid <guid> | -all] [var [...]]
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* If one or more variable names are specified, show information
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* named UEFI variables, otherwise show all the UEFI variables.
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*/
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int do_env_print_efi(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
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{
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+ efi_guid_t guid;
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+ const efi_guid_t *guid_p;
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+ bool default_guid, guid_any, verbose;
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efi_status_t ret;
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/* Initialize EFI drivers */
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@@ -205,12 +284,47 @@ int do_env_print_efi(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
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return CMD_RET_FAILURE;
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}
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- if (argc > 1)
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- /* show specified UEFI variables */
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- return efi_dump_vars(--argc, ++argv);
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+ default_guid = true;
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+ guid_any = false;
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+ verbose = true;
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+ for (argc--, argv++; argc > 0 && argv[0][0] == '-'; argc--, argv++) {
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+ if (!strcmp(argv[0], "-guid")) {
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+ if (argc == 1)
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+ return CMD_RET_USAGE;
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+
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+ /* -a already specified */
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+ if (!default_guid & guid_any)
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+ return CMD_RET_USAGE;
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+
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+ argc--;
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+ argv++;
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+ if (uuid_str_to_bin(argv[0], guid.b,
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+ UUID_STR_FORMAT_GUID))
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+ return CMD_RET_USAGE;
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+ default_guid = false;
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+ } else if (!strcmp(argv[0], "-all")) {
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+ /* -guid already specified */
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+ if (!default_guid && !guid_any)
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+ return CMD_RET_USAGE;
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+
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+ guid_any = true;
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+ default_guid = false;
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+ } else if (!strcmp(argv[0], "-n")) {
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+ verbose = false;
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+ } else {
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+ return CMD_RET_USAGE;
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+ }
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+ }
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+
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+ if (guid_any)
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+ guid_p = NULL;
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+ else if (default_guid)
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+ guid_p = &efi_global_variable_guid;
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+ else
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+ guid_p = (const efi_guid_t *)guid.b;
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/* enumerate and show all UEFI variables */
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- return efi_dump_var_all();
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+ return efi_dump_var_all(argc, argv, guid_p, verbose);
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}
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/**
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@@ -339,18 +453,22 @@ out:
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* Return: CMD_RET_SUCCESS on success, or CMD_RET_RET_FAILURE
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*
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* This function is for "env set -e" or "setenv -e" command:
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- * => env set -e var [value ...]]
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+ * => env set -e [-guid guid][-nv][-bs][-rt][-a][-v]
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+ * [-i address,size] var, or
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+ * var [value ...]
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* Encode values specified and set given UEFI variable.
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* If no value is specified, delete the variable.
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*/
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int do_env_set_efi(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
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{
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- char *var_name, *value = NULL;
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- efi_uintn_t size = 0;
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- u16 *var_name16 = NULL, *p;
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- size_t len;
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+ char *var_name, *value, *ep;
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+ ulong addr;
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+ efi_uintn_t size;
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efi_guid_t guid;
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u32 attributes;
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+ bool default_guid, verbose, value_on_memory;
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+ u16 *var_name16 = NULL, *p;
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+ size_t len;
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efi_status_t ret;
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if (argc == 1)
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@@ -364,32 +482,88 @@ int do_env_set_efi(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
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return CMD_RET_FAILURE;
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}
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- attributes = EFI_VARIABLE_BOOTSERVICE_ACCESS |
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- EFI_VARIABLE_RUNTIME_ACCESS;
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- if (!strcmp(argv[1], "-nv")) {
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- attributes |= EFI_VARIABLE_NON_VOLATILE;
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- argc--;
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- argv++;
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- if (argc == 1)
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- return CMD_RET_SUCCESS;
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+ /*
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+ * attributes = EFI_VARIABLE_BOOTSERVICE_ACCESS |
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+ * EFI_VARIABLE_RUNTIME_ACCESS;
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+ */
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+ value = NULL;
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+ size = 0;
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+ attributes = 0;
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+ guid = efi_global_variable_guid;
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+ default_guid = true;
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+ verbose = false;
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+ value_on_memory = false;
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+ for (argc--, argv++; argc > 0 && argv[0][0] == '-'; argc--, argv++) {
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+ if (!strcmp(argv[0], "-guid")) {
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+ if (argc == 1)
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+ return CMD_RET_USAGE;
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+
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+ argc--;
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+ argv++;
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+ if (uuid_str_to_bin(argv[0], guid.b,
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+ UUID_STR_FORMAT_GUID)) {
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+ printf("## Guid not specified or in XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX format\n");
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+ return CMD_RET_FAILURE;
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+ }
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+ default_guid = false;
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+ } else if (!strcmp(argv[0], "-bs")) {
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+ attributes |= EFI_VARIABLE_BOOTSERVICE_ACCESS;
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+ } else if (!strcmp(argv[0], "-rt")) {
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+ attributes |= EFI_VARIABLE_RUNTIME_ACCESS;
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+ } else if (!strcmp(argv[0], "-nv")) {
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+ attributes |= EFI_VARIABLE_NON_VOLATILE;
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+ } else if (!strcmp(argv[0], "-a")) {
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+ attributes |= EFI_VARIABLE_APPEND_WRITE;
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+ } else if (!strcmp(argv[0], "-i")) {
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+ /* data comes from memory */
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+ if (argc == 1)
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+ return CMD_RET_USAGE;
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+
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+ argc--;
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+ argv++;
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+ addr = simple_strtoul(argv[0], &ep, 16);
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+ if (*ep != ',')
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+ return CMD_RET_USAGE;
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+
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+ size = simple_strtoul(++ep, NULL, 16);
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+ if (!size)
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+ return CMD_RET_FAILURE;
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+ value_on_memory = true;
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+ } else if (!strcmp(argv[0], "-v")) {
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+ verbose = true;
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+ } else {
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+ return CMD_RET_USAGE;
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+ }
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}
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+ if (!argc)
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+ return CMD_RET_USAGE;
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- var_name = argv[1];
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- if (argc == 2) {
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- /* delete */
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- value = NULL;
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- size = 0;
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- } else { /* set */
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- argc -= 2;
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- argv += 2;
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+ var_name = argv[0];
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+ if (default_guid)
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+ guid = efi_global_variable_guid;
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+
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+ if (verbose) {
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+ printf("GUID: %s\n", efi_guid_to_str((const efi_guid_t *)
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+ &guid));
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+ printf("Attributes: 0x%x\n", attributes);
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+ }
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- for ( ; argc > 0; argc--, argv++)
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+ /* for value */
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+ if (value_on_memory)
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+ value = map_sysmem(addr, 0);
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+ else if (argc > 1)
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+ for (argc--, argv++; argc > 0; argc--, argv++)
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if (append_value(&value, &size, argv[0]) < 0) {
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printf("## Failed to process an argument, %s\n",
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argv[0]);
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ret = CMD_RET_FAILURE;
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goto out;
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}
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+
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+ if (size && verbose) {
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+ printf("Value:\n");
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+ print_hex_dump(" ", DUMP_PREFIX_OFFSET,
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+ 16, 1, value, size, true);
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}
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len = utf8_utf16_strnlen(var_name, strlen(var_name));
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@@ -402,17 +576,42 @@ int do_env_set_efi(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
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p = var_name16;
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utf8_utf16_strncpy(&p, var_name, len + 1);
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- guid = efi_global_variable_guid;
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ret = EFI_CALL(efi_set_variable(var_name16, &guid, attributes,
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size, value));
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+ unmap_sysmem(value);
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if (ret == EFI_SUCCESS) {
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ret = CMD_RET_SUCCESS;
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} else {
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- printf("## Failed to set EFI variable\n");
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+ const char *msg;
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+
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+ switch (ret) {
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+ case EFI_NOT_FOUND:
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+ msg = " (not found)";
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+ break;
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+ case EFI_WRITE_PROTECTED:
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+ msg = " (read only)";
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+ break;
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+ case EFI_INVALID_PARAMETER:
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+ msg = " (invalid parameter)";
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+ break;
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+ case EFI_SECURITY_VIOLATION:
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+ msg = " (validation failed)";
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+ break;
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+ case EFI_OUT_OF_RESOURCES:
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+ msg = " (out of memory)";
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+ break;
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+ default:
|
|
|
+ msg = "";
|
|
|
+ break;
|
|
|
+ }
|
|
|
+ printf("## Failed to set EFI variable%s\n", msg);
|
|
|
ret = CMD_RET_FAILURE;
|
|
|
}
|
|
|
out:
|
|
|
- free(value);
|
|
|
+ if (value_on_memory)
|
|
|
+ unmap_sysmem(value);
|
|
|
+ else
|
|
|
+ free(value);
|
|
|
free(var_name16);
|
|
|
|
|
|
return ret;
|