systemd-detect-virt: detect s390 virtualization

[elogind.git] / src / shared / efivars.c

diff --git a/src/shared/efivars.c b/src/shared/efivars.c
index f3eb6a6e5d1ca321555820a4141f2a0b7291f377..f18f5c4b16aa4b81057c5e2cbb96f0968f26e1a8 100644 (file)
--- a/src/shared/efivars.c
+++ b/src/shared/efivars.c
@@ -37,7 +37,7 @@ bool is_efi_boot(void) {
 
 static int read_flag(const char *varname) {
         int r;
-        void *v;
+        _cleanup_free_ void *v = NULL;
         size_t s;
         uint8_t b;
 
@@ -45,15 +45,11 @@ static int read_flag(const char *varname) {
         if (r < 0)
                 return r;
 
-        if (s != 1) {
-                r = -EINVAL;
-                goto finish;
-        }
+        if (s != 1)
+                return -EINVAL;
 
         b = *(uint8_t *)v;
         r = b > 0;
-finish:
-        free(v);
         return r;
 }
 
@@ -134,7 +130,7 @@ int efi_get_variable(
 
 int efi_get_variable_string(sd_id128_t vendor, const char *name, char **p) {
         _cleanup_free_ void *s = NULL;
-        size_t ss;
+        size_t ss = 0;
         int r;
         char *x;
 
@@ -397,7 +393,7 @@ fail:
 static int read_usec(sd_id128_t vendor, const char *name, usec_t *u) {
         _cleanup_free_ char *j = NULL;
         int r;
-        uint64_t x;
+        uint64_t x = 0;
 
         assert(name);
         assert(u);
@@ -444,9 +440,6 @@ int efi_loader_get_boot_usec(usec_t *firmware, usec_t *loader) {
 int efi_loader_get_device_part_uuid(sd_id128_t *u) {
         _cleanup_free_ char *p = NULL;
         int r, parsed[16];
-        unsigned i;
-
-        assert(u);
 
         r = efi_get_variable_string(EFI_VENDOR_LOADER, "LoaderDevicePartUUID", &p);
         if (r < 0)
@@ -459,8 +452,12 @@ int efi_loader_get_device_part_uuid(sd_id128_t *u) {
                    &parsed[12], &parsed[13], &parsed[14], &parsed[15]) != 16)
                 return -EIO;
 
-        for (i = 0; i < ELEMENTSOF(parsed); i++)
-                u->bytes[i] = parsed[i];
+        if (u) {
+                unsigned i;
+
+                for (i = 0; i < ELEMENTSOF(parsed); i++)
+                        u->bytes[i] = parsed[i];
+        }
 
         return 0;
 }