Function path_dirname

ccan/ccan/tal/path/path.c:471–505

}

char *path_dirname(const tal_t *ctx, const char *path)
{
	const char *sep;

	if (unlikely(!path) && taken(path))
		return NULL;

	sep = strrchr(path, PATH_SEP);
	if (!sep)
		return fixed_string(ctx, ".", path);

	/* Trailing slashes need to be trimmed. */
	if (!sep[1]) {
		const char *end;

		for (end = sep; end != path; end--)
			if (*end != PATH_SEP)
				break;

		/* Find *previous* / */
		for (sep = end; sep > path && *sep != PATH_SEP; sep--);
	}

	/* In case there are multiple / in a row. */
	while (sep > path && sep[-1] == PATH_SEP)
		sep--;

	if (sep == path) {
		if (path_is_abs(path))
			return tal_strndup(ctx, path, 1);
		else
			return fixed_string(ctx, ".", path);
	}
	return tal_strndup(ctx, path, sep - path);
}

bool path_is_abs(const char *path)
{