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 (3.5 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
  27 int link_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
  28 int 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 }