serialize: add serialize_item_hexmem()

src/shared/serialize.c

@@ -7,6 +7,7 @@
 #include "escape.h"
 #include "fd-util.h"
 #include "fileio.h"
+#include "hexdecoct.h"
 #include "memfd-util.h"
 #include "missing_mman.h"
 #include "missing_syscall.h"
@@ -173,6 +174,28 @@ int serialize_pidref(FILE *f, FDSet *fds, const char *key, PidRef *pidref) {
         return serialize_item_format(f, key, "@%i", copy);
 }
 
+int serialize_item_hexmem(FILE *f, const char *key, const void *p, size_t l) {
+        _cleanup_free_ char *encoded = NULL;
+        int r;
+
+        assert(f);
+        assert(key);
+        assert(p || l == 0);
+
+        if (l == 0)
+                return 0;
+
+        encoded = hexmem(p, l);
+        if (!encoded)
+                return log_oom_debug();
+
+        r = serialize_item(f, key, encoded);
+        if (r < 0)
+                return r;
+
+        return 1;
+}
+
 int deserialize_read_line(FILE *f, char **ret) {
         _cleanup_free_ char *line = NULL;
         int r;

src/shared/serialize.h

@@ -12,6 +12,7 @@
 int serialize_item(FILE *f, const char *key, const char *value);
 int serialize_item_escaped(FILE *f, const char *key, const char *value);
 int serialize_item_format(FILE *f, const char *key, const char *value, ...) _printf_(3,4);
+int serialize_item_hexmem(FILE *f, const char *key, const void *p, size_t l);
 int serialize_fd(FILE *f, FDSet *fds, const char *key, int fd);
 int serialize_usec(FILE *f, const char *key, usec_t usec);
 int serialize_dual_timestamp(FILE *f, const char *key, const dual_timestamp *t);