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-rw-r--r--kernel/kapi/filesystem.cpp8
-rw-r--r--kernel/kapi/filesystem.tests.cpp19
2 files changed, 27 insertions, 0 deletions
diff --git a/kernel/kapi/filesystem.cpp b/kernel/kapi/filesystem.cpp
index 5280b4fa..d37a4cf7 100644
--- a/kernel/kapi/filesystem.cpp
+++ b/kernel/kapi/filesystem.cpp
@@ -57,6 +57,14 @@ namespace kapi::filesystem
});
}
+ auto seek(size_t file_descriptor, kstd::units::bytes offset, seek_direction direction, seek_origin origin)
+ -> kstd::result<kstd::units::bytes>
+ {
+ return kernel::filesystem::open_file_table::get().file(file_descriptor).and_then([=](auto file) {
+ return file->seek(offset, direction, origin);
+ });
+ }
+
auto mkdir(std::string_view path) -> kstd::result<void>
{
return kernel::filesystem::vfs::get().mkdir(path);
diff --git a/kernel/kapi/filesystem.tests.cpp b/kernel/kapi/filesystem.tests.cpp
index 80fc7d3f..2f975bf8 100644
--- a/kernel/kapi/filesystem.tests.cpp
+++ b/kernel/kapi/filesystem.tests.cpp
@@ -3,6 +3,7 @@
#include <kernel/test_support/filesystem/storage_boot_module_vfs_fixture.hpp>
#include <kstd/system_error.hpp>
+#include <kstd/units.hpp>
#include <catch2/catch_test_macros.hpp>
@@ -142,6 +143,24 @@ SCENARIO_METHOD(kernel::tests::filesystem::storage_boot_module_vfs_fixture, "Kap
REQUIRE(kapi::filesystem::umount("/information"));
}
+ AND_GIVEN("an open file")
+ {
+ auto file = kapi::filesystem::open("/closed.txt");
+ REQUIRE(file);
+
+ THEN("seeking forward from the beginning succeeds")
+ {
+ REQUIRE(kapi::filesystem::seek(*file, 100_B, kapi::filesystem::seek_direction::forward,
+ kapi::filesystem::seek_origin::beginning) == 100_B);
+ }
+
+ THEN("seeking backward from the beginning fails")
+ {
+ REQUIRE_FALSE(kapi::filesystem::seek(*file, 100_B, kapi::filesystem::seek_direction::backward,
+ kapi::filesystem::seek_origin::beginning));
+ }
+ }
+
THEN("device can be opened as file and read from")
{
auto fd = kapi::filesystem::open("/dev/ram0").value();