Function strbuf_readlink

strbuf.c:581–607

#define STRBUF_MAXLINK (32767)

int strbuf_readlink(struct strbuf *sb, const char *path, size_t hint)
{
	size_t oldalloc = sb->alloc;

	if (hint < 32)
		hint = 32;

	while (hint < STRBUF_MAXLINK) {
		ssize_t len;

		strbuf_grow(sb, hint + 1);
		len = readlink(path, sb->buf, hint + 1);
		if (len < 0) {
			if (errno != ERANGE)
				break;
		} else if (len <= hint) {
			strbuf_setlen(sb, len);
			return 0;
		}

		/* .. the buffer was too small - try again */
		hint *= 2;
	}
	if (oldalloc == 0)
		strbuf_release(sb);
	return -1;
}

int strbuf_getcwd(struct strbuf *sb)
{