diff options
Diffstat (limited to 'src/shared/efivars.c')
| -rw-r--r-- | src/shared/efivars.c | 31 |
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; } |