From e80fec7feb62c741df5360c1841ca49e4087c1cd Mon Sep 17 00:00:00 2001 From: Kevin Wolf Date: Fri, 29 Apr 2011 10:58:12 +0200 Subject: qemu-img resize: Fix option parsing For shrinking images, you're supposed to use a negative size. However, the leading minus makes getopt think that it's an option and so you get the help text if you don't use -- like in 'qemu-img resize test.img -- -1G'. This patch handles the size first and removes it from the argument list so that getopt won't even try to interpret it and you don't need -- any more. Signed-off-by: Kevin Wolf --- qemu-img.c | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-) (limited to 'qemu-img.c') diff --git a/qemu-img.c b/qemu-img.c index ed5ba9111..e8251234b 100644 --- a/qemu-img.c +++ b/qemu-img.c @@ -1442,6 +1442,16 @@ static int img_resize(int argc, char **argv) { NULL } }; + /* Remove size from argv manually so that negative numbers are not treated + * as options by getopt. */ + if (argc < 3) { + help(); + return 1; + } + + size = argv[--argc]; + + /* Parse getopt arguments */ fmt = NULL; for(;;) { c = getopt(argc, argv, "f:h"); @@ -1458,11 +1468,10 @@ static int img_resize(int argc, char **argv) break; } } - if (optind + 1 >= argc) { + if (optind >= argc) { help(); } filename = argv[optind++]; - size = argv[optind++]; /* Choose grow, shrink, or absolute resize mode */ switch (size[0]) { -- cgit v1.2.3