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Diffstat (limited to 'src/shared/efivars.c')
-rw-r--r--src/shared/efivars.c31
1 files changed, 20 insertions, 11 deletions
diff --git a/src/shared/efivars.c b/src/shared/efivars.c
index 70b6ce1cc7..7918c59613 100644
--- a/src/shared/efivars.c
+++ b/src/shared/efivars.c
@@ -288,6 +288,21 @@ int efi_get_boot_order(uint16_t **order) {
return (int) (l / sizeof(uint16_t));
}
+static int boot_id_hex(const char s[4]) {
+ int i;
+ int id = 0;
+
+ for (i = 0; i < 4; i++)
+ if (s[i] >= '0' && s[i] <= '9')
+ id |= (s[i] - '0') << (3 - i) * 4;
+ else if (s[i] >= 'A' && s[i] <= 'F')
+ id |= (s[i] - 'A' + 10) << (3 - i) * 4;
+ else
+ return -1;
+
+ return id;
+}
+
int efi_get_boot_options(uint16_t **options) {
_cleanup_closedir_ DIR *dir = NULL;
struct dirent *de;
@@ -301,26 +316,20 @@ int efi_get_boot_options(uint16_t **options) {
return -errno;
while ((de = readdir(dir))) {
- size_t n;
- int a, b, c, d;
+ int id;
uint16_t *t;
if (strncmp(de->d_name, "Boot", 4) != 0)
continue;
- n = strlen(de->d_name);
- if (n != 45)
+ if (strlen(de->d_name) != 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))
+ id = boot_id_hex(de->d_name + 4);
+ if (id < 0)
continue;
t = realloc(list, (count + 1) * sizeof(uint16_t));
@@ -330,7 +339,7 @@ int efi_get_boot_options(uint16_t **options) {
}
list = t;
- list[count ++] = (a - '0') * 1000 + (b - '0') * 100 + (c - '0') * 10 + (d - '0');
+ list[count ++] = id;
}