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Userland: Show the current foreground process name in "w" output

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Add a "WHAT" column that shows which command is currently executing in
each active session. Very neat :^)
This commit is contained in:
Andreas Kling 2020-09-06 19:05:08 +02:00
parent 6d8c4af9c2
commit d531b4fa61
Notes: sideshowbarker 2024-07-19 02:52:45 +09:00 
Author: https://github.com/awesomekling
Commit: https://github.com/SerenityOS/serenity/commit/d531b4fa616
1 changed files with 20 additions and 4 deletions
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24
Userland/w.cpp
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@ -1,6 +1,7 @@
#include <AK/JsonObject.h>
#include <AK/JsonValue.h>
#include <LibCore/File.h>
#include <LibCore/ProcessStatisticsReader.h>
#include <pwd.h>
#include <stdio.h>
#include <sys/stat.h>
@ -28,6 +29,11 @@ int main()
return 1;
}
if (unveil("/proc", "r") < 0) {
perror("unveil");
return 1;
}
unveil(nullptr, nullptr);
auto file_or_error = Core::File::open("/var/run/utmp", Core::IODevice::ReadOnly);
@ -42,10 +48,12 @@ int main()
return 1;
}
auto process_statistics = Core::ProcessStatisticsReader::get_all();
auto now = time(nullptr);
printf("\033[1m%-10s %-12s %-16s %-6s\033[0m\n",
"USER", "TTY", "FROM", "IDLE");
printf("\033[1m%-10s %-12s %-16s %-6s %s\033[0m\n",
"USER", "TTY", "FROM", "IDLE", "WHAT");
json.value().as_object().for_each_member([&](auto& tty, auto& value) {
const JsonObject& entry = value.as_object();
auto uid = entry.get("uid").to_u32();
@ -71,11 +79,19 @@ int main()
}
}
printf("%-10s %-12s %-16s %-6s\n",
String what = "n/a";
for (auto& it : process_statistics) {
if (it.value.tty == tty && it.value.pid == it.value.pgid)
what = it.value.name;
}
printf("%-10s %-12s %-16s %-6s %s\n",
username.characters(),
tty.characters(),
from.characters(),
idle_string.characters());
idle_string.characters(),
what.characters());
});
return 0;
}