Mimi,
On Tue, Jul 23, 2019 at 02:24:53PM -0400, Mimi Zohar wrote:
> On Tue, 2019-07-23 at 19:41 +0300, Vitaly Chikunov wrote:
> > On Tue, Jul 23, 2019 at 11:53:10AM -0400, Mimi Zohar wrote:
> > > On Tue, 2019-07-23 at 12:47 -0300, Bruno E. O. Meneguele wrote:
> > >
> > > > > @@ -1402,6 +1400,41 @@ static int tpm_pcr_read(int idx, uint8_t *pcr, int len)
> > > > > return result;
> > > > > }
> > > > >
> > > > > +#ifdef HAVE_TSSPCRREAD
> > > > > +static int tpm2_pcr_read(int idx, uint8_t *hwpcr, int len, char **errmsg)
> > > > > +{
> > > > > + FILE *fp;
> > > > > + char pcr[100]; /* may contain an error */
> > > > > + char cmd[50];
> > > > > + int ret;
> > > > > +
> > > > > + sprintf(cmd, "tsspcrread -halg sha1 -ha %d -ns 2> /dev/null", idx);
> > > > > + fp = popen(cmd, "r");
> > > > > + if (!fp) {
> > > > > + snprintf(pcr, sizeof(pcr), "popen failed: %s", strerror(errno));
> > > > > + *errmsg = strdup("popen failed:");
> > > >
> > > > Should it have been
> > > >
> > > > *errmsg = strdup(pcr);
> > > >
> > > Yes, of course.
> >
> > Or better to use asprintf(3).
>
> That's even better, assuming that we want to include
> AC_USE_SYSTEM_EXTENSIONS in configure.ac?
Yes.
> Did you want to make this change as a separate patch, or should I fold
> it into this one?
Probably you, since you are first to add snprintf+strdup.
Thanks,
