busybox/coreutils/link.c
Denys Vlasenko bc9bbeb2b8 libarchive: do not extract unsafe symlinks unless $EXTRACT_UNSAFE_SYMLINKS=1
function                                             old     new   delta
unsafe_symlink_target                                  -     147    +147
unzip_main                                          2711    2732     +21
copy_file                                           1657    1678     +21
tar_main                                             999     971     -28
data_extract_all                                    1038     984     -54
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(add/remove: 2/0 grow/shrink: 2/2 up/down: 189/-82)           Total: 107 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-10 11:52:42 +02:00

40 lines
986 B
C

/*
* link implementation for busybox
*
* Copyright (C) 2017 Denys Vlasenko <vda.linux@googlemail.com>
*
* Licensed under GPLv2, see file LICENSE in this source tree.
*/
//config:config LINK
//config: bool "link (3.1 kb)"
//config: default y
//config: help
//config: link creates hard links between files.
//applet:IF_LINK(APPLET_NOFORK(link, link, BB_DIR_BIN, BB_SUID_DROP, link))
//kbuild:lib-$(CONFIG_LINK) += link.o
//usage:#define link_trivial_usage
//usage: "FILE LINK"
//usage:#define link_full_usage "\n\n"
//usage: "Create hard LINK to FILE"
#include "libbb.h"
/* This is a NOFORK applet. Be very careful! */
int link_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int link_main(int argc UNUSED_PARAM, char **argv)
{
getopt32(argv, "^" "" "\0" "=2");
argv += optind;
if (link(argv[0], argv[1]) != 0) {
/* shared message */
bb_perror_msg_and_die("can't create %slink '%s' to '%s'",
"hard", argv[1], argv[0]
);
}
return EXIT_SUCCESS;
}