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lsof: Separate file name components

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In /proc/PID/fds we get not only file name, but also additional information
about file type, state etc. This commit makes `lsof' command separate these
components. When you are filtering files by file name, only actual file name
is checked (not additional data).
This commit is contained in:
Maciej Zygmanowski 2020-09-26 17:58:58 +02:00 • committed by Andreas Kling
parent 2ed0385075
commit dd682168a9
1 changed files with 49 additions and 7 deletions
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56
Userland/lsof.cpp
View file

@ -24,6 +24,7 @@
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <AK/GenericLexer.h>
#include <AK/HashMap.h>
#include <AK/JsonArray.h>
#include <AK/JsonObject.h>
@ -39,9 +40,46 @@
struct OpenFile {
int fd;
int pid;
String type;
String name;
String state;
String full_name;
};
static bool parse_name(StringView name, OpenFile& file)
{
GenericLexer lexer(name);
auto component1 = lexer.consume_until(':');
if (lexer.tell_remaining() == 0) {
file.name = component1;
return true;
} else {
file.type = component1;
auto component2 = lexer.consume_while([](char c) { return is_printable(c) && !is_whitespace(c) && c != '('; });
lexer.ignore_while(is_whitespace);
file.name = component2;
if (lexer.tell_remaining() == 0) {
return true;
} else {
if (!lexer.consume_specific('(')) {
dbg() << "parse_name: expected (";
return false;
}
auto component3 = lexer.consume_until(')');
if (lexer.tell_remaining() != 0) {
dbg() << "parse_name: expected EOF";
return false;
}
file.state = component3;
return true;
}
}
}
static Vector<OpenFile> get_open_files_by_pid(pid_t pid)
{
auto file = Core::File::open(String::format("/proc/%d/fds", pid), Core::IODevice::OpenMode::ReadOnly);
@ -63,7 +101,11 @@ static Vector<OpenFile> get_open_files_by_pid(pid_t pid)
OpenFile open_file;
open_file.pid = pid;
open_file.fd = object.as_object().get("fd").to_int();
open_file.name = object.as_object().get("absolute_path").to_string();
String name = object.as_object().get("absolute_path").to_string();
ASSERT(parse_name(name, open_file));
open_file.full_name = name;
files.append(open_file);
});
return files;
@ -71,7 +113,7 @@ static Vector<OpenFile> get_open_files_by_pid(pid_t pid)
static void display_entry(const OpenFile& file, const Core::ProcessStatistics& statistics)
{
printf("%-28s %4d %4d %-10s %4d %s\n", statistics.name.characters(), file.pid, statistics.pgid, statistics.username.characters(), file.fd, file.name.characters());
printf("%-28s %4d %4d %-10s %4d %s\n", statistics.name.characters(), file.pid, statistics.pgid, statistics.username.characters(), file.fd, file.full_name.characters());
}
int main(int argc, char* argv[])
@ -106,11 +148,11 @@ int main(int argc, char* argv[])
if (argc == 1)
arg_all_processes = true;
else {
parser.add_option(arg_pid, "Select PID", nullptr, 'p', "pid");
parser.add_option(arg_fd, "Select file descriptor", nullptr, 'd', "fd");
parser.add_option(arg_uid, "Select login/UID", nullptr, 'u', "login/UID");
parser.add_option(arg_pgid, "Select process group ID", nullptr, 'g', "PGID");
parser.add_positional_argument(arg_file_name, "File name", "name", Core::ArgsParser::Required::No);
parser.add_option(arg_pid, "Select by PID", nullptr, 'p', "pid");
parser.add_option(arg_fd, "Select by file descriptor", nullptr, 'd', "fd");
parser.add_option(arg_uid, "Select by login/UID", nullptr, 'u', "login/UID");
parser.add_option(arg_pgid, "Select by process group ID", nullptr, 'g', "PGID");
parser.add_positional_argument(arg_file_name, "File name", "file name", Core::ArgsParser::Required::No);
parser.parse(argc, argv);
}
{