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ln: --no-target-directory implies --no-dereference

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as in GNU coreutils

Signed-off-by: Kaarle Ritvanen <kaarle.ritvanen@datakunkku.fi>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Kaarle Ritvanen 2019-10-08 14:07:50 +02:00 committed by Denys Vlasenko
parent 4527273f1c
commit 71b268c7d9
1 changed files with 21 additions and 4 deletions
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25
coreutils/ln.c
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@ -41,7 +41,6 @@
/* This is a NOEXEC applet. Be very careful! */ /* This is a NOEXEC applet. Be very careful! */
#define LN_SYMLINK (1 << 0) #define LN_SYMLINK (1 << 0)
#define LN_FORCE (1 << 1) #define LN_FORCE (1 << 1)
#define LN_NODEREFERENCE (1 << 2) #define LN_NODEREFERENCE (1 << 2)
@ -63,7 +62,22 @@ int ln_main(int argc, char **argv)
int (*link_func)(const char *, const char *); int (*link_func)(const char *, const char *);
opts = getopt32(argv, "^" "sfnbS:vT" "\0" "-1", &suffix); opts = getopt32(argv, "^" "sfnbS:vT" "\0" "-1", &suffix);
/*
-s, --symbolic make symbolic links instead of hard links
-f, --force remove existing destination files
-n, --no-dereference treat LINK_NAME as a normal file if it is a symbolic link to a directory
-b like --backup but does not accept an argument
--backup[=CONTROL] make a backup of each existing destination file
-S, --suffix=SUFFIX override the usual backup suffix
-v, --verbose
-T, --no-target-directory
-d, -F, --directory allow the superuser to attempt to hard link directories
-i, --interactive prompt whether to remove destinations
-L, --logical dereference TARGETs that are symbolic links
-P, --physical make hard links directly to symbolic links
-r, --relative create symbolic links relative to link location
-t, --target-directory=DIRECTORY specify the DIRECTORY in which to create the links
*/
last = argv[argc - 1]; last = argv[argc - 1];
argv += optind; argv += optind;
argc -= optind; argc -= optind;
@ -86,8 +100,11 @@ int ln_main(int argc, char **argv)
src = last; src = last;
if (is_directory(src, if (is_directory(src,
(opts & LN_NODEREFERENCE) ^ LN_NODEREFERENCE /*followlinks:*/ !(opts & (LN_NODEREFERENCE|LN_LINKFILE))
) /* Why LN_LINKFILE does not follow links:
* -T/--no-target-directory implies -n/--no-dereference
*/
)
) { ) {
if (opts & LN_LINKFILE) { if (opts & LN_LINKFILE) {
bb_error_msg_and_die("'%s' is a directory", src); bb_error_msg_and_die("'%s' is a directory", src);