/*
* Copyright (c) 2018 Stefan Sperling <stsp@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <sys/queue.h>
#include <sys/uio.h>
#include <sys/time.h>
#include <sys/limits.h>
#include <sys/syslimits.h>
#include <stdint.h>
#include <imsg.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sha1.h>
#include <zlib.h>
#include "got_error.h"
#include "got_object.h"
#include "got_lib_delta.h"
#include "got_lib_inflate.h"
#include "got_lib_object.h"
#include "got_lib_object_parse.h"
#include "got_lib_privsep.h"
static volatile sig_atomic_t sigint_received;
static void
catch_sigint(int signo)
{
sigint_received = 1;
}
static const struct got_error *
read_commit_object(struct got_commit_object **commit, FILE *f)
{
struct got_object *obj;
const struct got_error *err = NULL;
size_t len;
uint8_t *p;
err = got_inflate_to_mem(&p, &len, f);
if (err)
return err;
err = got_object_parse_header(&obj, p, len);
if (err)
return err;
if (len < obj->hdrlen + obj->size) {
err = got_error(GOT_ERR_BAD_OBJ_DATA);
goto done;
}
if (obj->type != GOT_OBJ_TYPE_COMMIT) {
err = got_error(GOT_ERR_OBJ_TYPE);
goto done;
}
/* Skip object header. */
len -= obj->hdrlen;
err = got_object_parse_commit(commit, p + obj->hdrlen, len);
done:
free(p);
got_object_close(obj);
return err;
}
int
main(int argc, char *argv[])
{
const struct got_error *err = NULL;
struct imsgbuf ibuf;
signal(SIGINT, catch_sigint);
imsg_init(&ibuf, GOT_IMSG_FD_CHILD);
#ifndef PROFILE
/* revoke access to most system calls */
if (pledge("stdio recvfd", NULL) == -1) {
err = got_error_from_errno();
got_privsep_send_error(&ibuf, err);
return 1;
}
#endif
while (1) {
struct imsg imsg;
FILE *f = NULL;
struct got_commit_object *commit = NULL;
if (sigint_received) {
err = got_error(GOT_ERR_CANCELLED);
break;
}
err = got_privsep_recv_imsg(&imsg, &ibuf, 0);
if (err) {
if (err->code == GOT_ERR_PRIVSEP_PIPE)
err = NULL;
break;
}
if (imsg.hdr.type == GOT_IMSG_STOP)
break;
if (imsg.hdr.type != GOT_IMSG_COMMIT_REQUEST) {
err = got_error(GOT_ERR_PRIVSEP_MSG);
goto done;
}
if (imsg.fd == -1) {
err = got_error(GOT_ERR_PRIVSEP_NO_FD);
goto done;
}
/* Always assume file offset zero. */
f = fdopen(imsg.fd, "rb");
if (f == NULL) {
err = got_error_from_errno();
goto done;
}
err = read_commit_object(&commit, f);
if (err)
goto done;
err = got_privsep_send_commit(&ibuf, commit);
done:
if (f) {
if (fclose(f) != 0 && err == NULL)
err = got_error_from_errno();
} else if (imsg.fd != -1) {
if (close(imsg.fd) != 0 && err == NULL)
err = got_error_from_errno();
}
imsg_free(&imsg);
if (err)
break;
}
imsg_clear(&ibuf);
if (err) {
if (!sigint_received && err->code != GOT_ERR_PRIVSEP_PIPE) {
fprintf(stderr, "%s: %s\n", getprogname(), err->msg);
got_privsep_send_error(&ibuf, err);
}
}
if (close(GOT_IMSG_FD_CHILD) != 0 && err == NULL)
err = got_error_from_errno();
return err ? 1 : 0;
}
