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pgrep: Add -x option to only select exact matches

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Tim Ledbetter 2023-05-30 17:51:30 +01:00 committed by Andreas Kling
parent 821bf5e071
commit f5da6d61b4
Notes: sideshowbarker 2024-07-17 21:26:19 +09:00 
Author: https://github.com/tcl3
Commit: https://github.com/SerenityOS/serenity/commit/f5da6d61b4
Pull-request: https://github.com/SerenityOS/serenity/pull/19155
2 changed files with 10 additions and 2 deletions
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4
Base/usr/share/man/man1/pgrep.md
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@ -5,7 +5,7 @@ pgrep - look up processes based on name
## Synopsis
```sh
$ pgrep [--count] [-d delimiter] [--ignore-case] [--list-name] [--uid uid-list] [--invert-match] <process-name>
$ pgrep [--count] [-d delimiter] [--ignore-case] [--list-name] [--uid uid-list] [--invert-match] [--exact] <process-name>
```
## Options
@ -15,7 +15,7 @@ $ pgrep [--count] [-d delimiter] [--ignore-case] [--list-name] [--uid uid-list]
* `-i`, `--ignore-case`: Make matches case-insensitive
* `-l`, `--list-name`: List the process name in addition to its pid
* `-U uid-list`, `--uid uid-list`: Select only processes whose UID is in the given comma-separated list. Login name or numerical user ID may be used
* `-x`, `--exact`: Select only processes whose names match the given pattern exactly
* `-v`, `--invert-match`: Select non-matching lines
## Arguments

8
Userland/Utilities/pgrep.cpp
View file

@ -27,6 +27,7 @@ ErrorOr<int> serenity_main(Main::Arguments args)
bool case_insensitive = false;
bool list_process_name = false;
bool invert_match = false;
bool exact_match = false;
HashTable<uid_t> uids_to_filter_by;
StringView pattern;
@ -60,6 +61,7 @@ ErrorOr<int> serenity_main(Main::Arguments args)
},
});
args_parser.add_option(invert_match, "Select non-matching lines", "invert-match", 'v');
args_parser.add_option(exact_match, "Select only processes whose names match the given pattern exactly", "exact", 'x');
args_parser.add_positional_argument(pattern, "Process name to search for", "process-name");
args_parser.parse(args);
@ -67,6 +69,12 @@ ErrorOr<int> serenity_main(Main::Arguments args)
if (case_insensitive)
options |= PosixFlags::Insensitive;
StringBuilder exact_pattern_builder;
if (exact_match) {
exact_pattern_builder.appendff("^({})$", pattern);
pattern = exact_pattern_builder.string_view();
}
Regex<PosixExtended> re(pattern, options);
if (re.parser_result.error != regex::Error::NoError) {
return 1;