2 files changed, 22 insertions, 0 deletions
diff --git a/src/shared/util.c b/src/shared/util.c
index b1689e651f..d8a75bdc6a 100644
--- a/src/shared/util.c
+++ b/src/shared/util.c
@@ -332,6 +332,26 @@ int safe_atoi(const char *s, int *ret_i) {
         return 0;
 }
 
+int safe_atou8(const char *s, uint8_t *ret) {
+        char *x = NULL;
+        unsigned long l;
+
+        assert(s);
+        assert(ret);
+
+        errno = 0;
+        l = strtoul(s, &x, 0);
+
+        if (!x || x == s || *x || errno)
+                return errno > 0 ? -errno : -EINVAL;
+
+        if ((unsigned long) (uint8_t) l != l)
+                return -ERANGE;
+
+        *ret = (uint8_t) l;
+        return 0;
+}
+
 int safe_atollu(const char *s, long long unsigned *ret_llu) {
         char *x = NULL;
         unsigned long long l;
diff --git a/src/shared/util.h b/src/shared/util.h
index d9d525e8a5..81da59b20c 100644
--- a/src/shared/util.h
+++ b/src/shared/util.h
@@ -192,6 +192,8 @@ int safe_atolli(const char *s, long long int *ret_i);
 
 int safe_atod(const char *s, double *ret_d);
 
+int safe_atou8(const char *s, uint8_t *ret);
+
 #if __WORDSIZE == 32
 static inline int safe_atolu(const char *s, unsigned long *ret_u) {
         assert_cc(sizeof(unsigned long) == sizeof(unsigned));