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ps: Add -u option, to list processes associated with specified users

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Sam Atkins 2023-05-15 17:28:48 +01:00 committed by Andreas Kling
parent cf998bc082
commit be71ccb690
Notes: sideshowbarker 2024-07-17 05:13:53 +09:00 
Author: https://github.com/AtkinsSJ
Commit: https://github.com/SerenityOS/serenity/commit/be71ccb690
Pull-request: https://github.com/SerenityOS/serenity/pull/18856
Reviewed-by: https://github.com/awesomekling
2 changed files with 19 additions and 1 deletions
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3
Base/usr/share/man/man1/ps.md
View file

@ -5,7 +5,7 @@ ps - list currently running processes
## Synopsis
```**sh
$ ps [--version] [-a] [-A] [-e] [-f] [-p pid-list] [-q pid-list]
$ ps [--version] [-a] [-A] [-e] [-f] [-p pid-list] [-q pid-list] [-u user-list]
```
## Description
@ -20,6 +20,7 @@ For each process, print its PID (process ID), to which TTY it belongs, and invok
* `-f`: Also print for each process: UID (as resolved username), PPID (parent PID), and STATE (Runnable, Sleeping, Selecting, Reading, etc.)
* `-p pid-list`: Only consider the given PIDs, if they exist. `pid-list` is a list of PIDs, separated by commas or spaces.
* `-q pid-list`: Only consider the given PIDs, if they exist. Output the processes in the order provided by `pid-list`. `pid-list` is a list of PIDs, separated by commas or spaces.
* `-u user-list`: Only consider processes for the given users, if they exist. `user-list` is a list of UIDs or login names, separated by commas or spaces.
## Examples

17
Userland/Utilities/ps.cpp
View file

@ -7,6 +7,7 @@
#include <AK/QuickSort.h>
#include <AK/String.h>
#include <LibCore/Account.h>
#include <LibCore/ArgsParser.h>
#include <LibCore/ProcessStatisticsReader.h>
#include <LibCore/System.h>
@ -61,6 +62,7 @@ ErrorOr<int> serenity_main(Main::Arguments arguments)
TRY(Core::System::pledge("stdio rpath"));
TRY(Core::System::unveil("/sys/kernel/processes", "r"));
TRY(Core::System::unveil("/etc/passwd", "r"));
TRY(Core::System::unveil("/etc/group", "r"));
TRY(Core::System::unveil(nullptr, nullptr));
enum class Alignment {
@ -81,6 +83,7 @@ ErrorOr<int> serenity_main(Main::Arguments arguments)
bool provided_pid_list = false;
bool provided_quick_pid_list = false;
Vector<pid_t> pid_list;
Vector<uid_t> uid_list;
Core::ArgsParser args_parser;
args_parser.add_option(every_terminal_process_flag, "Show every process associated with terminals", nullptr, 'a');
@ -101,6 +104,18 @@ ErrorOr<int> serenity_main(Main::Arguments arguments)
warnln("Could not parse '{}' as a PID.", pid_string);
return pid;
}));
args_parser.add_option(make_list_option(uid_list, "Show processes with a matching user ID or login name. (Comma- or space-separated list.)", nullptr, 'u', "user-list", [&](StringView user_string) -> Optional<uid_t> {
if (auto uid = user_string.to_uint<uid_t>(); uid.has_value()) {
return uid.value();
}
auto maybe_account = Core::Account::from_name(user_string, Core::Account::Read::PasswdOnly);
if (maybe_account.is_error()) {
warnln("Could not find user '{}': {}", user_string, maybe_account.error());
return {};
}
return maybe_account.value().uid();
}));
args_parser.parse(arguments);
if (provided_pid_list && provided_quick_pid_list) {
@ -148,6 +163,8 @@ ErrorOr<int> serenity_main(Main::Arguments arguments)
// Filter
if (!pid_list.is_empty()) {
processes.remove_all_matching([&](auto& process) { return !pid_list.contains_slow(process.pid); });
} else if (!uid_list.is_empty()) {
processes.remove_all_matching([&](auto& process) { return !uid_list.contains_slow(process.uid); });
} else if (every_terminal_process_flag) {
processes.remove_all_matching([&](auto& process) { return process.tty.is_empty(); });
} else if (!every_process_flag) {