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man: Refactor with LibManual and Core::Stream

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kleines Filmröllchen 2022-06-24 09:38:57 +02:00 • committed by Linus Groh
parent 146bce53dd
commit 64ca546a06
2 changed files with 29 additions and 40 deletions
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67
Userland/Utilities/man.cpp
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@ -8,13 +8,14 @@
#include <AK/ByteBuffer.h>
#include <AK/DeprecatedString.h>
#include <LibCore/ArgsParser.h>
#include <LibCore/File.h>
#include <LibCore/Stream.h>
#include <LibCore/System.h>
#include <LibMain/Main.h>
#include <LibManual/PageNode.h>
#include <LibManual/SectionNode.h>
#include <LibMarkdown/Document.h>
#include <fcntl.h>
#include <spawn.h>
#include <stdio.h>
#include <sys/ioctl.h>
#include <sys/wait.h>
#include <unistd.h>
@ -29,11 +30,7 @@ static ErrorOr<pid_t> pipe_to_pager(DeprecatedString const& command)
posix_spawn_file_actions_init(&action);
posix_spawn_file_actions_adddup2(&action, stdout_pipe[0], STDIN_FILENO);
pid_t pid;
if ((errno = posix_spawnp(&pid, argv[0], &action, nullptr, const_cast<char**>(argv), environ))) {
perror("posix_spawn");
exit(1);
}
pid_t pid = TRY(Core::System::posix_spawnp("sh"sv, &action, nullptr, const_cast<char**>(argv), environ));
posix_spawn_file_actions_destroy(&action);
TRY(Core::System::dup2(stdout_pipe[1], STDOUT_FILENO));
@ -45,7 +42,7 @@ static ErrorOr<pid_t> pipe_to_pager(DeprecatedString const& command)
ErrorOr<int> serenity_main(Main::Arguments arguments)
{
int view_width = 0;
if (isatty(STDOUT_FILENO)) {
if (isatty(STDOUT_FILENO) != 0) {
struct winsize ws;
if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == 0)
view_width = ws.ws_col;
@ -59,9 +56,9 @@ ErrorOr<int> serenity_main(Main::Arguments arguments)
TRY(Core::System::unveil("/bin", "x"));
TRY(Core::System::unveil(nullptr, nullptr));
StringView section {};
StringView name {};
StringView pager {};
DeprecatedString section;
DeprecatedString name;
DeprecatedString pager;
Core::ArgsParser args_parser;
args_parser.set_general_help("Read manual pages. Try 'man man' to get started.");
@ -70,49 +67,41 @@ ErrorOr<int> serenity_main(Main::Arguments arguments)
args_parser.add_option(pager, "Pager to pipe the man page to", "pager", 'P', "pager");
args_parser.parse(arguments);
auto make_path = [name](StringView section) {
return DeprecatedString::formatted("/usr/share/man/man{}/{}.md", section, name);
};
Optional<NonnullRefPtr<Manual::PageNode>> page;
if (section.is_empty()) {
constexpr StringView sections[] = {
"1"sv,
"2"sv,
"3"sv,
"4"sv,
"5"sv,
"6"sv,
"7"sv,
"8"sv
};
for (auto s : sections) {
DeprecatedString path = make_path(s);
if (access(path.characters(), R_OK) == 0) {
section = s;
for (auto const& s : Manual::sections) {
auto const maybe_page = make_ref_counted<Manual::PageNode>(s, TRY(String::from_utf8(name)));
if (Core::File::exists(TRY(maybe_page->path()).to_deprecated_string())) {
page = maybe_page;
section = s->section_name().to_deprecated_string();
break;
}
}
} else {
auto number_section = section.to_uint();
if (number_section.has_value())
page = make_ref_counted<Manual::PageNode>(Manual::sections[number_section.value() - 1], TRY(String::from_utf8(name)));
else
warnln("Section name '{}' invalid", section);
}
auto filename = make_path(section);
if (section == nullptr) {
if (!page.has_value()) {
warnln("No man page for {}", name);
exit(1);
} else if (access(filename.characters(), R_OK) != 0) {
} else if (!Core::File::exists(TRY((*page)->path()))) {
warnln("No man page for {} in section {}", name, section);
exit(1);
}
DeprecatedString pager_command;
if (!pager.is_empty())
pager_command = pager;
else
pager_command = DeprecatedString::formatted("less -P 'Manual Page {}({}) line %l?e (END):.'", StringView(name).replace("'"sv, "'\\''"sv, ReplaceMode::FirstOnly), StringView(section).replace("'"sv, "'\\''"sv, ReplaceMode::FirstOnly));
pid_t pager_pid = TRY(pipe_to_pager(pager_command));
if (pager.is_empty())
pager = TRY(String::formatted("less -P 'Manual Page {}({}) line %l?e (END):.'", StringView(name).replace("'"sv, "'\\''"sv, ReplaceMode::FirstOnly), StringView(section).replace("'"sv, "'\\''"sv, ReplaceMode::FirstOnly))).to_deprecated_string();
pid_t pager_pid = TRY(pipe_to_pager(pager));
auto file = TRY(Core::Stream::File::open(filename, Core::Stream::OpenMode::Read));
auto file = TRY(Core::Stream::File::open(TRY((*page)->path()), Core::Stream::OpenMode::Read));
TRY(Core::System::pledge("stdio proc"));
dbgln("Loading man page from {}", filename);
dbgln("Loading man page from {}", (*page)->path());
auto buffer = TRY(file->read_all());
auto source = DeprecatedString::copy(buffer);