int ln_main(int argc, char **argv)
{
int status = EXIT_SUCCESS;
int flag;
char *last;
char *src_name;
char *src;
char *suffix = (char*)"~";
struct stat statbuf;
int (*link_func)(const char *, const char *);
flag = getopt32(argc, argv, "sfnbS:", &suffix);
if (argc == optind) {
bb_show_usage();
}
last = argv[argc - 1];
argv += optind;
if (argc == optind + 1) {
*--argv = last;
last = bb_get_last_path_component(xstrdup(last));
}
do {
src_name = NULL;
src = last;
if (is_directory(src,
(flag & LN_NODEREFERENCE) ^ LN_NODEREFERENCE,
NULL)) {
src_name = xstrdup(*argv);
src = concat_path_file(src, bb_get_last_path_component(src_name));
free(src_name);
src_name = src;
}
if (!(flag & LN_SYMLINK) && stat(*argv, &statbuf)) {
// coreutils: "ln dangling_symlink new_hardlink" works
if (lstat(*argv, &statbuf) || !S_ISLNK(statbuf.st_mode)) {
bb_perror_msg("%s", *argv);
status = EXIT_FAILURE;
free(src_name);
continue;
}
}
if (flag & LN_BACKUP) {
char *backup;
backup = xasprintf("%s%s", src, suffix);
if (rename(src, backup) < 0 && errno != ENOENT) {
bb_perror_msg("%s", src);
status = EXIT_FAILURE;
free(backup);
continue;
}
free(backup);
/*
* When the source and dest are both hard links to the same
* inode, a rename may succeed even though nothing happened.
* Therefore, always unlink().
*/
unlink(src);
} else if (flag & LN_FORCE) {
unlink(src);
}
link_func = link;
if (flag & LN_SYMLINK) {
link_func = symlink;
}
if (link_func(*argv, src) != 0) {
bb_perror_msg("%s", src);
status = EXIT_FAILURE;
}
free(src_name);
} while ((++argv)[1]);
return status;
}
int ln_main(int argc, char **argv)
{
int status = EXIT_SUCCESS;
int opts;
char *last;
char *src_name;
char *src;
char *suffix = (char*)"~";
struct stat statbuf;
int (*link_func)(const char *, const char *);
opt_complementary = "-1"; /* min one arg */
opts = getopt32(argv, "sfnbS:vT", &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" */
*--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));
}
do {
src_name = NULL;
src = last;
if (is_directory(src,
(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);
src_name = src;
}
if (!(opts & LN_SYMLINK) && stat(*argv, &statbuf)) {
// coreutils: "ln dangling_symlink new_hardlink" works
if (lstat(*argv, &statbuf) || !S_ISLNK(statbuf.st_mode)) {
bb_simple_perror_msg(*argv);
status = EXIT_FAILURE;
free(src_name);
continue;
}
}
if (opts & LN_BACKUP) {
char *backup;
backup = xasprintf("%s%s", src, suffix);
if (rename(src, backup) < 0 && errno != ENOENT) {
bb_simple_perror_msg(src);
status = EXIT_FAILURE;
free(backup);
continue;
}
free(backup);
/*
* When the source and dest are both hard links to the same
* inode, a rename may succeed even though nothing happened.
* Therefore, always unlink().
*/
unlink(src);
} else if (opts & LN_FORCE) {
unlink(src);
}
link_func = link;
if (opts & LN_SYMLINK) {
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;
}
