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Utilities: Add zcat

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This utility is actually a symlink to the gunzip utility.
The gunzip utility is modified to enable writing to stdout when running
through the zcat symlink, to emulate the same behavior on other OSes.

In addition to that, the gunzip utility is now required on a default
installation as it could be a vital utility under some conditions (for
example, downloading source code in a tar.gz file).
This commit is contained in:
Liav A 2023-08-12 20:37:27 +03:00 committed by Sam Atkins
parent 1e737e763e
commit 029160fd27
Notes: sideshowbarker 2024-07-17 02:42:21 +09:00 
Author: https://github.com/supercomputer7
Commit: https://github.com/SerenityOS/serenity/commit/029160fd27
Pull-request: https://github.com/SerenityOS/serenity/pull/20531
Reviewed-by: https://github.com/AtkinsSJ
Reviewed-by: https://github.com/tcl3
2 changed files with 12 additions and 4 deletions
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5
Userland/Utilities/CMakeLists.txt
View file

@ -2,12 +2,12 @@ file(GLOB CMD_SOURCES CONFIGURE_DEPENDS "*.cpp")
list(APPEND SPECIAL_TARGETS test install)
list(APPEND REQUIRED_TARGETS
arp base64 basename cat chmod chown clear comm cp cut date dd df diff dirname dmesg du echo env expr false
file find grep groups head host hostname id ifconfig kill killall ln logout ls mkdir mount mv network-settings nproc
file find grep groups gunzip head host hostname id ifconfig kill killall ln logout ls mkdir mount mv network-settings nproc
patch pgrep pidof ping pkill pmap ps readlink realpath reboot rm rmdir sed route seq shutdown sleep sort stat stty su tail test
touch tr true umount uname uniq uptime w wc which whoami xargs yes
)
list(APPEND RECOMMENDED_TARGETS
aconv adjtime aplay abench asctl bt checksum chres cksum copy fortune gunzip gzip init install keymap lsirq lsof lspci lzcat man mknod mktemp
aconv adjtime aplay abench asctl bt checksum chres cksum copy fortune gzip init install keymap lsirq lsof lspci lzcat man mknod mktemp
nc netstat notify ntpquery open passwd pixelflut pls printf pro shot strings tar tt unzip wallpaper xzcat zip
)
@ -70,6 +70,7 @@ endif()
install(CODE "file(CREATE_LINK grep ${CMAKE_INSTALL_PREFIX}/bin/egrep SYMBOLIC)")
install(CODE "file(CREATE_LINK grep ${CMAKE_INSTALL_PREFIX}/bin/fgrep SYMBOLIC)")
install(CODE "file(CREATE_LINK grep ${CMAKE_INSTALL_PREFIX}/bin/rgrep SYMBOLIC)")
install(CODE "file(CREATE_LINK gunzip ${CMAKE_INSTALL_PREFIX}/bin/zcat SYMBOLIC)")
target_link_libraries(abench PRIVATE LibAudio LibFileSystem)
target_link_libraries(aconv PRIVATE LibAudio LibFileSystem)

11
Userland/Utilities/gunzip.cpp
View file

@ -1,5 +1,6 @@
/*
* Copyright (c) 2020, the SerenityOS developers.
* Copyright (c) 2023, Liav A. <liavalb@hotmail.co.il>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
@ -18,8 +19,14 @@ ErrorOr<int> serenity_main(Main::Arguments args)
bool write_to_stdout { false };
Core::ArgsParser args_parser;
args_parser.add_option(keep_input_files, "Keep (don't delete) input files", "keep", 'k');
args_parser.add_option(write_to_stdout, "Write to stdout, keep original files unchanged", "stdout", 'c');
// NOTE: If the user run this program via the /bin/zcat symlink,
// then emulate gzip decompression to stdout.
if (args.argc > 0 && args.strings[0] == "zcat"sv) {
write_to_stdout = true;
} else {
args_parser.add_option(keep_input_files, "Keep (don't delete) input files", "keep", 'k');
args_parser.add_option(write_to_stdout, "Write to stdout, keep original files unchanged", "stdout", 'c');
}
args_parser.add_positional_argument(filenames, "File to decompress", "FILE");
args_parser.parse(args);