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-rw-r--r--src/shared/efivars.c126
-rw-r--r--src/shared/efivars.h9
-rw-r--r--src/shared/missing.h8
3 files changed, 108 insertions, 35 deletions
diff --git a/src/shared/efivars.c b/src/shared/efivars.c
index e16c61029b..70b6ce1cc7 100644
--- a/src/shared/efivars.c
+++ b/src/shared/efivars.c
@@ -22,16 +22,23 @@
#include <unistd.h>
#include <string.h>
#include <fcntl.h>
+#include <ctype.h>
#include "util.h"
#include "utf8.h"
#include "efivars.h"
-bool is_efiboot(void) {
+bool is_efi_boot(void) {
return access("/sys/firmware/efi", F_OK) >= 0;
}
-int efi_get_variable(sd_id128_t vendor, const char *name, uint32_t *attribute, void **value, size_t *size) {
+int efi_get_variable(
+ sd_id128_t vendor,
+ const char *name,
+ uint32_t *attribute,
+ void **value,
+ size_t *size) {
+
_cleanup_close_ int fd = -1;
_cleanup_free_ char *p = NULL;
uint32_t a;
@@ -61,7 +68,7 @@ int efi_get_variable(sd_id128_t vendor, const char *name, uint32_t *attribute, v
n = read(fd, &a, sizeof(a));
if (n < 0)
- return (int) n;
+ return -errno;
if (n != sizeof(a))
return -EIO;
@@ -92,15 +99,22 @@ int efi_get_variable(sd_id128_t vendor, const char *name, uint32_t *attribute, v
return 0;
}
-char *efi_get_variable_string(sd_id128_t vendor, const char *name) {
+int efi_get_variable_string(sd_id128_t vendor, const char *name, char **p) {
_cleanup_free_ void *s = NULL;
size_t ss;
- int err;
+ int r;
+ char *x;
- err = efi_get_variable(vendor, name, NULL, &s, &ss);
- if (err < 0)
- return NULL;
- return utf16_to_utf8(s, ss);
+ r = efi_get_variable(vendor, name, NULL, &s, &ss);
+ if (r < 0)
+ return r;
+
+ x = utf16_to_utf8(s, ss);
+ if (!x)
+ return -ENOMEM;
+
+ *p = x;
+ return 0;
}
static size_t utf16_size(const uint16_t *s) {
@@ -108,6 +122,7 @@ static size_t utf16_size(const uint16_t *s) {
while (s[l] > 0)
l++;
+
return (l+1) * sizeof(uint16_t);
}
@@ -131,7 +146,12 @@ static void efi_guid_to_id128(const void *guid, sd_id128_t *id128) {
memcpy(&id128->bytes[8], uuid->u4, sizeof(uuid->u4));
}
-int efi_get_boot_option(uint32_t id, uint32_t *attributes, char **title, sd_id128_t *part_uuid, char **path, char **data, size_t *data_size) {
+int efi_get_boot_option(
+ uint16_t id,
+ char **title,
+ sd_id128_t *part_uuid,
+ char **path) {
+
struct boot_option {
uint32_t attr;
uint16_t path_len;
@@ -157,23 +177,20 @@ int efi_get_boot_option(uint32_t id, uint32_t *attributes, char **title, sd_id12
};
} _packed_;
- char boot_id[32];
- _cleanup_free_ char *buf = NULL;
+ char boot_id[9];
+ _cleanup_free_ uint8_t *buf = NULL;
size_t l;
struct boot_option *header;
size_t title_size;
char *s = NULL;
char *p = NULL;
sd_id128_t p_uuid = SD_ID128_NULL;
- char *d = NULL;
- size_t d_size = 0;
int err;
snprintf(boot_id, sizeof(boot_id), "Boot%04X", id);
err = efi_get_variable(EFI_VENDOR_GLOBAL, boot_id, NULL, (void **)&buf, &l);
if (err < 0)
return err;
-
if (l < sizeof(struct boot_option))
return -ENOENT;
@@ -189,7 +206,7 @@ int efi_get_boot_option(uint32_t id, uint32_t *attributes, char **title, sd_id12
}
if (header->path_len > 0) {
- char *dbuf;
+ uint8_t *dbuf;
size_t dnext;
dbuf = buf + offsetof(struct boot_option, title) + title_size;
@@ -233,45 +250,92 @@ int efi_get_boot_option(uint32_t id, uint32_t *attributes, char **title, sd_id12
}
}
- *title = s;
+ if (title)
+ *title = s;
if (part_uuid)
*part_uuid = p_uuid;
if (path)
*path = p;
- if (data)
- *data = d;
- if (data_size)
- *data_size = d_size;
+
return 0;
err:
free(s);
free(p);
- free(d);
return err;
}
-int efi_get_boot_order(uint16_t **order, size_t *count) {
+int efi_get_boot_order(uint16_t **order) {
void *buf;
size_t l;
- int err;
+ int r;
- err = efi_get_variable(EFI_VENDOR_GLOBAL, "BootOrder", NULL, &buf, &l);
- if (err < 0)
- return err;
+ r = efi_get_variable(EFI_VENDOR_GLOBAL, "BootOrder", NULL, &buf, &l);
+ if (r < 0)
+ return r;
- if (l == 0) {
+ if (l <= 0) {
free(buf);
return -ENOENT;
}
- if ((l % sizeof(uint16_t) > 0)) {
+ if ((l % sizeof(uint16_t) > 0) ||
+ (l / sizeof(uint16_t) > INT_MAX)) {
free(buf);
return -EINVAL;
}
*order = buf;
- *count = l / sizeof(uint16_t);
- return 0;
+ return (int) (l / sizeof(uint16_t));
+}
+
+int efi_get_boot_options(uint16_t **options) {
+ _cleanup_closedir_ DIR *dir = NULL;
+ struct dirent *de;
+ uint16_t *list = NULL;
+ int count = 0;
+
+ assert(options);
+
+ dir = opendir("/sys/firmware/efi/efivars/");
+ if (!dir)
+ return -errno;
+
+ while ((de = readdir(dir))) {
+ size_t n;
+ int a, b, c, d;
+ uint16_t *t;
+
+ if (strncmp(de->d_name, "Boot", 4) != 0)
+ continue;
+
+ n = strlen(de->d_name);
+ if (n != 45)
+ continue;
+
+ if (strcmp(de->d_name + 8, "-8be4df61-93ca-11d2-aa0d-00e098032b8c") != 0)
+ continue;
+
+ a = de->d_name[4];
+ b = de->d_name[5];
+ c = de->d_name[6];
+ d = de->d_name[7];
+
+ if (!isdigit(a) || !isdigit(b) || !isdigit(c) || !isdigit(d))
+ continue;
+
+ t = realloc(list, (count + 1) * sizeof(uint16_t));
+ if (!t) {
+ free(list);
+ return -ENOMEM;
+ }
+
+ list = t;
+ list[count ++] = (a - '0') * 1000 + (b - '0') * 100 + (c - '0') * 10 + (d - '0');
+
+ }
+
+ *options = list;
+ return count;
}
static int read_usec(sd_id128_t vendor, const char *name, usec_t *u) {
diff --git a/src/shared/efivars.h b/src/shared/efivars.h
index d54cc433b2..380e038f69 100644
--- a/src/shared/efivars.h
+++ b/src/shared/efivars.h
@@ -31,13 +31,14 @@
#define EFI_VENDOR_LOADER SD_ID128_MAKE(4a,67,b0,82,0a,4c,41,cf,b6,c7,44,0b,29,bb,8c,4f)
#define EFI_VENDOR_GLOBAL SD_ID128_MAKE(8b,e4,df,61,93,ca,11,d2,aa,0d,00,e0,98,03,2b,8c)
-bool is_efiboot(void);
+bool is_efi_boot(void);
int efi_get_variable(sd_id128_t vendor, const char *name, uint32_t *attribute, void **value, size_t *size);
-char *efi_get_variable_string(sd_id128_t vendor, const char *name);
+int efi_get_variable_string(sd_id128_t vendor, const char *name, char **p);
-int efi_get_boot_option(uint32_t nr, uint32_t *attributes, char **title, sd_id128_t *partuuid, char **path, char **data, size_t *data_size);
-int efi_get_boot_order(uint16_t **order, size_t *count);
+int efi_get_boot_option(uint16_t nr, char **title, sd_id128_t *partuuid, char **path);
+int efi_get_boot_order(uint16_t **order);
+int efi_get_boot_options(uint16_t **options);
int efi_get_boot_timestamps(const dual_timestamp *n, dual_timestamp *firmware, dual_timestamp *loader);
diff --git a/src/shared/missing.h b/src/shared/missing.h
index c53579ff7f..d4ba0d3dcf 100644
--- a/src/shared/missing.h
+++ b/src/shared/missing.h
@@ -196,6 +196,14 @@ static inline pid_t gettid(void) {
#define MS_STRICTATIME (1<<24)
#endif
+#ifndef MS_REC
+#define MS_REC 16384
+#endif
+
+#ifndef MS_SHARED
+#define MS_SHARED (1<<20)
+#endif
+
#ifndef PR_SET_NO_NEW_PRIVS
#define PR_SET_NO_NEW_PRIVS 38
#endif
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-12-12 21:14:45 +0000