LXR busybox/coreutils/link.c

   1/*
   2 * link implementation for busybox
   3 *
   4 * Copyright (C) 2017 Denys Vlasenko <vda.linux@googlemail.com>
   5 *
   6 * Licensed under GPLv2, see file LICENSE in this source tree.
   7 */
   8//config:config LINK
   9//config:       bool "link (3.1 kb)"
  10//config:       default y
  11//config:       help
  12//config:       link creates hard links between files.
  13
  14//applet:IF_LINK(APPLET_NOFORK(link, link, BB_DIR_BIN, BB_SUID_DROP, link))
  15
  16//kbuild:lib-$(CONFIG_LINK) += link.o
  17
  18//usage:#define link_trivial_usage
  19//usage:       "FILE LINK"
  20//usage:#define link_full_usage "\n\n"
  21//usage:       "Create hard LINK to FILE"
  22
  23#include "libbb.h"
  24
  25/* This is a NOFORK applet. Be very careful! */
  26
  27int link_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
  28int link_main(int argc UNUSED_PARAM, char **argv)
  29{
  30        getopt32(argv, "^" "" "\0" "=2");
  31        argv += optind;
  32        if (link(argv[0], argv[1]) != 0) {
  33                /* shared message */
  34                bb_perror_msg_and_die("can't create %slink '%s' to '%s'",
  35                        "hard", argv[1], argv[0]
  36                );
  37        }
  38        return EXIT_SUCCESS;
  39}
  40