shared/json: add json_dispatch_absolute_path

diff --git a/src/shared/json.c b/src/shared/json.c
index edfae5b47be12b4fb85177c98526456535cdd4f8..e1ee98ef2d5e8a61af8b76c7675c5adf66ac2f89 100644 (file)
--- a/src/shared/json.c
+++ b/src/shared/json.c
@@ -23,6 +23,7 @@
 #include "math-util.h"
 #include "memory-util.h"
 #include "memstream-util.h"
+#include "path-util.h"
 #include "set.h"
 #include "string-table.h"
 #include "string-util.h"
@@ -5006,6 +5007,27 @@ int json_dispatch_user_group_name(const char *name, JsonVariant *variant, JsonDi
         return 0;
 }
 
+int json_dispatch_absolute_path(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) {
+        const char *path;
+        char **p = ASSERT_PTR(userdata);
+
+        assert(variant);
+
+        if (!json_variant_is_string(variant))
+                return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not a string.", strna(name));
+
+        path = json_variant_string(variant);
+        if (!path_is_valid(path))
+                return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not a valid path.", strna(name));
+        if (!path_is_absolute(path))
+                return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' must be an absolute path.", strna(name));
+
+        if (free_and_strdup(p, path) < 0)
+                return json_log_oom(variant, flags);
+
+        return 0;
+}
+
 int json_dispatch_id128(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) {
         sd_id128_t *uuid = userdata;
         int r;

diff --git a/src/shared/json.h b/src/shared/json.h
index ec6274ad8d9ec4cde7bf62aa444d43e0e18e77ea..6a93530a3acb372822d8c2ab36b5ad747a4176dd 100644 (file)
--- a/src/shared/json.h
+++ b/src/shared/json.h
@@ -425,6 +425,7 @@ int json_dispatch_int8(const char *name, JsonVariant *variant, JsonDispatchFlags
 int json_dispatch_uint8(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata);
 int json_dispatch_uid_gid(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata);
 int json_dispatch_user_group_name(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata);
+int json_dispatch_absolute_path(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata);
 int json_dispatch_id128(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata);
 int json_dispatch_unsupported(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata);
 int json_dispatch_unbase64_iovec(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata);