1 files changed, 49 insertions, 0 deletions
diff --git a/libbb/read.c b/libbb/read.c
index 7b804125a..405e216dc 100644
--- a/libbb/read.c
+++ b/libbb/read.c
@@ -291,3 +291,52 @@ void* FAST_FUNC xmalloc_xopen_read_close(const char *filename, size_t *sizep)
 		bb_perror_msg_and_die("can't read '%s'", filename);
 	return buf;
 }
+
+/* libbb candidate */
+#if 0
+static void *xmalloc_read(int fd, size_t *sizep)
+{
+	char *buf;
+	size_t size, rd_size, total;
+	off_t to_read;
+	struct stat st;
+
+	to_read = sizep ? *sizep : INT_MAX; /* max to read */
+
+	/* Estimate file size */
+	st.st_size = 0; /* in case fstat fails, assume 0 */
+	fstat(fd, &st);
+	/* /proc/N/stat files report st_size 0 */
+	/* In order to make such files readable, we add small const */
+	size = (st.st_size | 0x3ff) + 1;
+
+	total = 0;
+	buf = NULL;
+	while (1) {
+		if (to_read < size)
+			size = to_read;
+		buf = xrealloc(buf, total + size + 1);
+		rd_size = full_read(fd, buf + total, size);
+		if ((ssize_t)rd_size < 0) { /* error */
+			free(buf);
+			return NULL;
+		}
+		total += rd_size;
+		if (rd_size < size) /* EOF */
+			break;
+		to_read -= rd_size;
+		if (to_read <= 0)
+			break;
+		/* grow by 1/8, but in [1k..64k] bounds */
+		size = ((total / 8) | 0x3ff) + 1;
+		if (size > 64*1024)
+			size = 64*1024;
+	}
+	xrealloc(buf, total + 1);
+	buf[total] = '\0';
+
+	if (sizep)
+		*sizep = total;
+	return buf;
+}
+#endif