config: more tweaks

[oweals/busybox.git] / coreutils / ln.c

diff --git a/coreutils/ln.c b/coreutils/ln.c
index 6da290c11182ee73d678f282af153cf24d014996..3fe2f3f64818ecbb06ff67ea4ea2a676b5891c0b 100644 (file)
--- a/coreutils/ln.c
+++ b/coreutils/ln.c
@@ -6,21 +6,49 @@
  *
  * Licensed under GPLv2 or later, see file LICENSE in this source tree.
  */
+//config:config LN
+//config:      bool "ln (4.9 kb)"
+//config:      default y
+//config:      help
+//config:      ln is used to create hard or soft links between files.
+
+//applet:IF_LN(APPLET_NOEXEC(ln, ln, BB_DIR_BIN, BB_SUID_DROP, ln))
+
+//kbuild:lib-$(CONFIG_LN) += ln.o
 
 /* BB_AUDIT SUSv3 compliant */
 /* BB_AUDIT GNU options missing: -d, -F, -i, and -v. */
 /* http://www.opengroup.org/onlinepubs/007904975/utilities/ln.html */
 
+//usage:#define ln_trivial_usage
+//usage:       "[OPTIONS] TARGET... LINK|DIR"
+//usage:#define ln_full_usage "\n\n"
+//usage:       "Create a link LINK or DIR/TARGET to the specified TARGET(s)\n"
+//usage:     "\n       -s      Make symlinks instead of hardlinks"
+//usage:     "\n       -f      Remove existing destinations"
+//usage:     "\n       -n      Don't dereference symlinks - treat like normal file"
+//usage:     "\n       -b      Make a backup of the target (if exists) before link operation"
+//usage:     "\n       -S suf  Use suffix instead of ~ when making backup files"
+//usage:     "\n       -T      2nd arg must be a DIR"
+//usage:     "\n       -v      Verbose"
+//usage:
+//usage:#define ln_example_usage
+//usage:       "$ ln -s BusyBox /tmp/ls\n"
+//usage:       "$ ls -l /tmp/ls\n"
+//usage:       "lrwxrwxrwx    1 root     root            7 Apr 12 18:39 ls -> BusyBox*\n"
+
 #include "libbb.h"
 
 /* This is a NOEXEC applet. Be very careful! */
 
 
-#define LN_SYMLINK          1
-#define LN_FORCE            2
-#define LN_NODEREFERENCE    4
-#define LN_BACKUP           8
-#define LN_SUFFIX           16
+#define LN_SYMLINK          (1 << 0)
+#define LN_FORCE            (1 << 1)
+#define LN_NODEREFERENCE    (1 << 2)
+#define LN_BACKUP           (1 << 3)
+#define LN_SUFFIX           (1 << 4)
+#define LN_VERBOSE          (1 << 5)
+#define LN_LINKFILE         (1 << 6)
 
 int ln_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 int ln_main(int argc, char **argv)
@@ -34,11 +62,15 @@ int ln_main(int argc, char **argv)
        struct stat statbuf;
        int (*link_func)(const char *, const char *);
 
-       opt_complementary = "-1"; /* min one arg */
-       opts = getopt32(argv, "sfnbS:", &suffix);
+       opts = getopt32(argv, "^" "sfnbS:vT" "\0" "-1", &suffix);
 
        last = argv[argc - 1];
        argv += optind;
+       argc -= optind;
+
+       if ((opts & LN_LINKFILE) && argc > 2) {
+               bb_error_msg_and_die("-T accepts 2 args max");
+       }
 
        if (!argv[1]) {
                /* "ln PATH/TO/FILE" -> "ln PATH/TO/FILE FILE" */
@@ -54,9 +86,12 @@ int ln_main(int argc, char **argv)
                src = last;
 
                if (is_directory(src,
-                               (opts & LN_NODEREFERENCE) ^ LN_NODEREFERENCE,
-                               NULL)
+                               (opts & LN_NODEREFERENCE) ^ LN_NODEREFERENCE
+                               )
                ) {
+                       if (opts & LN_LINKFILE) {
+                               bb_error_msg_and_die("'%s' is a directory", src);
+                       }
                        src_name = xstrdup(*argv);
                        src = concat_path_file(src, bb_get_last_path_component_strip(src_name));
                        free(src_name);
@@ -97,13 +132,16 @@ int ln_main(int argc, char **argv)
                        link_func = symlink;
                }
 
+               if (opts & LN_VERBOSE) {
+                       printf("'%s' -> '%s'\n", src, *argv);
+               }
+
                if (link_func(*argv, src) != 0) {
                        bb_simple_perror_msg(src);
                        status = EXIT_FAILURE;
                }
 
                free(src_name);
-
        } while ((++argv)[1]);
 
        return status;