ubase

commit 2ca69a77fb92c7fdcbc93784e201362b1f9c3744
parent c4315c880a1ef0b85677d8ae2fd9e4fe3f3af4f9
Author: sin <sin@2f30.org>
Date:   Sun,  1 Sep 2013 17:57:59 +0100

Implement -o support for fallocate(1)

Diffstat:
M
fallocate.c
 | 
9
++++++---

1 file changed, 6 insertions(+), 3 deletions(-)
diff --git a/fallocate.c b/fallocate.c
@@ -9,19 +9,22 @@
 static void
 usage(void)
 {
-	eprintf("usage: %s -l length file\n", argv0);
+	eprintf("usage: %s [-o offset] -l length file\n", argv0);
 }
 
 int
 main(int argc, char *argv[])
 {
 	int fd;
-	long size;
+	off_t size = 0, offset = 0;
 
 	ARGBEGIN {
 	case 'l':
 		size = estrtol(EARGF(usage()), 10);
 		break;
+	case 'o':
+		offset = estrtol(EARGF(usage()), 10);
+		break;
 	default:
 		usage();
 	} ARGEND;
@@ -33,7 +36,7 @@ main(int argc, char *argv[])
 	if (fd < 0)
 		eprintf("open %s:", argv[0]);
 
-	if (posix_fallocate(fd, 0, size) < 0)
+	if (posix_fallocate(fd, offset, size) < 0)
 		eprintf("posix_fallocate:");
 
 	close(fd);