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ps: Add --ppid option to filter by parent PID

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Tim Ledbetter 2023-07-10 20:47:55 +01:00 committed by Sam Atkins
parent d3c5ae0860
commit 4e7e878606
Notes: sideshowbarker 2024-07-17 02:05:41 +09:00 
Author: https://github.com/tcl3
Commit: https://github.com/SerenityOS/serenity/commit/4e7e878606
Pull-request: https://github.com/SerenityOS/serenity/pull/19933
Reviewed-by: https://github.com/AtkinsSJ ✅
2 changed files with 11 additions and 1 deletions
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3
Base/usr/share/man/man1/ps.md
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@ -5,7 +5,7 @@ ps - list currently running processes
## Synopsis
```**sh
$ ps [--version] [-a] [-A] [-e] [-f] [-p pid-list] [-q pid-list] [-t tty-list] [-u user-list]
$ ps [--version] [-a] [-A] [-e] [-f] [-p pid-list] [--ppid pid-list] [-q pid-list] [-t tty-list] [-u user-list]
```
## Description
@ -19,6 +19,7 @@ For each process, print its PID (process ID), to which TTY it belongs, and invok
* `-A` or `-e`: Consider all processes, not just those in the current TTY.
* `-f`: Also print for each process: UID (as resolved username), PPID (parent PID), and STATE (Runnable, Sleeping, Selecting, Reading, etc.)
* `-p pid-list`: Select processes matching any of the given PIDs. `pid-list` is a list of PIDs, separated by commas or spaces.
* `--ppid pid-list`: Select processes whose PPID matches any of the given PIDs. `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.
* `-t tty-list`: Select processes associated with any of the given terminals. `tty-list` is a list of short TTY names (e.g: `pts:0`) or the full TTY device paths, separated by commas or spaces.
* `-u user-list`: Select processes matching any of the given UIDs. `user-list` is a list of UIDs or login names, separated by commas or spaces.

9
Userland/Utilities/ps.cpp
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@ -121,6 +121,7 @@ ErrorOr<int> serenity_main(Main::Arguments arguments)
bool provided_filtering_option = false;
bool provided_quick_pid_list = false;
Vector<pid_t> pid_list;
Vector<pid_t> parent_pid_list;
Vector<DeprecatedString> tty_list;
Vector<uid_t> uid_list;
@ -136,6 +137,13 @@ 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(parent_pid_list, "Show processes with a matching PPID. (Comma- or space-separated list.)", "ppid", {}, "pid-list", [&](StringView pid_string) {
provided_filtering_option = true;
auto pid = pid_string.to_int();
if (!pid.has_value())
warnln("Could not parse '{}' as a PID.", pid_string);
return pid;
}));
args_parser.add_option(make_list_option(pid_list, "Show processes with a matching PID. (Comma- or space-separated list.) Processes will be listed in the order given.", nullptr, 'q', "pid-list", [&](StringView pid_string) {
provided_quick_pid_list = true;
auto pid = pid_string.to_int();
@ -217,6 +225,7 @@ ErrorOr<int> serenity_main(Main::Arguments arguments)
// Default is to show processes from the current TTY
if ((!provided_filtering_option && process.tty == this_pseudo_tty_name.bytes_as_string_view())
|| (!pid_list.is_empty() && pid_list.contains_slow(process.pid))
|| (!parent_pid_list.is_empty() && parent_pid_list.contains_slow(process.ppid))
|| (!uid_list.is_empty() && uid_list.contains_slow(process.uid))
|| (!tty_list.is_empty() && tty_list.contains_slow(process.tty))
|| (every_terminal_process_flag && !process.tty.is_empty())) {