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Re: [Qemu-devel] [6215] snapshot subcommand for qemu-img (Kevin Wolf)
From: |
M. Warner Losh |
Subject: |
Re: [Qemu-devel] [6215] snapshot subcommand for qemu-img (Kevin Wolf) |
Date: |
Tue, 13 Jan 2009 13:36:33 -0700 (MST) |
In message: <address@hidden>
Anthony Liguori <address@hidden> writes:
: Anthony Liguori wrote:
: > +static void img_snapshot(int argc, char **argv)
: > +{
: > + BlockDriverState *bs;
: > + QEMUSnapshotInfo sn;
: > + char *filename, *snapshot_name = NULL;
: > + char c;
: > + int ret;
: > + int action = 0;
: > + qemu_timeval tv;
: > +
: > + /* Parse commandline parameters */
: > + for(;;) {
: > + c = getopt(argc, argv, "la:c:d:h");
: > + if (c == -1)
: > + break;
: >
:
: char's are not always signed so this code is incorrect. You should use
: an int instead. Can you send another patch fixing this please?
More importantly, getopt returns an 'int' not a 'signed char'. This
means it can report values that can't be represented by a 'signed
char'.
Warner