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tail: Port to LibMain

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Fabian INGREMEAU 2022-01-23 18:08:44 +01:00 committed by Brian Gianforcaro
parent 96db8a061b
commit daf7f72ff3
Notes: sideshowbarker 2024-07-17 20:17:00 +09:00 
Author: https://github.com/Tractorou24 🔰
Commit: https://github.com/SerenityOS/serenity/commit/daf7f72ff36
Pull-request: https://github.com/SerenityOS/serenity/pull/12091
Reviewed-by: https://github.com/bgianfo ✅
Reviewed-by: https://github.com/kennethmyhra ✅
2 changed files with 8 additions and 17 deletions
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1
Userland/Utilities/CMakeLists.txt
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@ -157,6 +157,7 @@ target_link_libraries(stat LibMain)
target_link_libraries(strace LibMain)
target_link_libraries(tac LibMain)
target_link_libraries(su LibCrypt LibMain)
target_link_libraries(tail LibMain)
target_link_libraries(tar LibArchive LibCompress)
target_link_libraries(telws LibProtocol LibLine)
target_link_libraries(test-fuzz LibCore LibGemini LibGfx LibHTTP LibIPC LibJS LibMarkdown LibShell)

24
Userland/Utilities/tail.cpp
View file

@ -6,7 +6,8 @@
#include <LibCore/ArgsParser.h>
#include <LibCore/File.h>
#include <stdio.h>
#include <LibCore/System.h>
#include <LibMain/Main.h>
#include <stdlib.h>
#include <unistd.h>
@ -71,12 +72,9 @@ static off_t find_seek_pos(Core::File& file, int wanted_lines)
return pos;
}
int main(int argc, char* argv[])
ErrorOr<int> serenity_main(Main::Arguments arguments)
{
if (pledge("stdio rpath", nullptr) < 0) {
perror("pledge");
return 1;
}
TRY(Core::System::pledge("stdio rpath"));
bool follow = false;
int line_count = DEFAULT_LINE_COUNT;
@ -87,18 +85,10 @@ int main(int argc, char* argv[])
args_parser.add_option(follow, "Output data as it is written to the file", "follow", 'f');
args_parser.add_option(line_count, "Fetch the specified number of lines", "lines", 'n', "number");
args_parser.add_positional_argument(file, "File path", "file");
args_parser.parse(argc, argv);
args_parser.parse(arguments);
auto f = Core::File::construct(file);
if (!f->open(Core::OpenMode::ReadOnly)) {
warnln("Failed to open {}: {}", f->name(), f->error_string());
exit(1);
}
if (pledge("stdio", nullptr) < 0) {
perror("pledge");
return 1;
}
auto f = TRY(Core::File::open(file, Core::OpenMode::ReadOnly));
TRY(Core::System::pledge("stdio"));
auto pos = find_seek_pos(*f, line_count);
return tail_from_pos(*f, pos, follow);