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ln: explain why we use xstrdup

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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2011-03-21 12:36:35 +01:00
parent 32176ccec4
commit b0e8ced358
1 changed files with 5 additions and 1 deletions
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6
coreutils/ln.c
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@ -40,8 +40,12 @@ int ln_main(int argc, char **argv)
last = argv[argc - 1];
argv += optind;
if (argc == optind + 1) {
if (!argv[1]) {
/* "ln PATH/TO/FILE" -> "ln PATH/TO/FILE FILE" */
*--argv = last;
/* xstrdup is needed: "ln -s PATH/TO/FILE/" is equivalent to
* "ln -s PATH/TO/FILE/ FILE", not "ln -s PATH/TO/FILE FILE"
*/
last = bb_get_last_path_component_strip(xstrdup(last));
}