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/* runcap - run program and capture its output
Copyright (C) 2017 Sergey Poznyakoff
Runcap is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 3 of the License, or (at your
option) any later version.
Runcap is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with Runcap. If not, see <http://www.gnu.org/licenses/>. */
#include <sys/types.h>
#include <unistd.h>
#include <errno.h>
#include "runcap.h"
off_t
runcap_tell(struct runcap *rc, int sd)
{
struct stream_capture *cap;
off_t off;
cap = runcap_get_capture(rc, sd);
if (!cap)
return -1;
if (cap->sc_storfd != -1) {
off = lseek(cap->sc_storfd, 0, SEEK_CUR);
if (off == -1)
return -1;
off -= cap->sc_level;
} else
off = 0;
return off + cap->sc_cur;
}
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