apio/Luna
1
1
Fork 0
Code Issues Pull Requests Actions Projects Releases 8 Wiki Activity

apps: Add free
Some checks failed
continuous-integration/drone/push Build is failing
Details

Browse Source
This commit is contained in:
apio 2023-08-17 20:15:39 +02:00
parent 95a33c484e
commit f2a5c9ad3f
Signed by: apio
GPG Key ID: B8A7D06E42258954
2 changed files with 51 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
apps/CMakeLists.txt
View File

@ -47,3 +47,4 @@ luna_app(socket-client.cpp socket-client)
luna_app(input.cpp input)
luna_app(shmem-test.cpp shmem-test)
luna_app(touch.cpp touch)
luna_app(free.cpp free)

50
apps/free.cpp Normal file
View File

@ -0,0 +1,50 @@
#include <luna/Units.h>
#include <os/ArgumentParser.h>
#include <os/File.h>
#include <sys/memstat.h>
Result<int> luna_main(int argc, char** argv)
{
bool reserved { false };
bool human_readable { false };
os::ArgumentParser parser;
parser.add_description("Query the amount of memory available and used in the system.");
parser.add_system_program_info("free"_sv);
parser.add_switch_argument(reserved, 'r', "show-reserved"_sv, "show reserved system memory"_sv);
parser.add_switch_argument(human_readable, 'h', "human-readable"_sv, "show output in human-readable units"_sv);
parser.parse(argc, argv);
struct membuf buf;
memstat(&buf);
if (human_readable)
{
auto total = TRY(to_dynamic_unit(buf.mem_total, 10, false, Unit::Binary, true));
auto free = TRY(to_dynamic_unit(buf.mem_free, 10, false, Unit::Binary, true));
auto used = TRY(to_dynamic_unit(buf.mem_used, 10, false, Unit::Binary, true));
os::println("%s total memory, out of which:", total.chars());
os::println("%s used", used.chars());
os::println("%s free", free.chars());
}
else
{
os::println("%lu total memory, out of which:", buf.mem_total);
os::println("%lu used", buf.mem_used);
os::println("%lu free", buf.mem_free);
}
if (reserved)
{
if (human_readable)
{
auto reserved_string = TRY(to_dynamic_unit(buf.mem_reserved, 10, false, Unit::Binary, true));
os::println("%s reserved", reserved_string.chars());
}
else { os::println("%lu reserved", buf.mem_reserved); }
}
return 0;
}