/*
* Copyright (c) 2018, 2019 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;
}
int
main(int argc, char *argv[])
{
const struct got_error *err = NULL;
struct imsgbuf ibuf;
size_t datalen;
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, imsg_outfd;
FILE *f = NULL;
size_t size;
struct got_object *obj = NULL;
uint8_t *buf = NULL;
memset(&imsg, 0, sizeof(imsg));
imsg.fd = -1;
memset(&imsg_outfd, 0, sizeof(imsg_outfd));
imsg_outfd.fd = -1;
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_BLOB_REQUEST) {
err = got_error(GOT_ERR_PRIVSEP_MSG);
goto done;
}
if (imsg.fd == -1) {
err = got_error(GOT_ERR_PRIVSEP_NO_FD);
goto done;
}
err = got_privsep_recv_imsg(&imsg_outfd, &ibuf, 0);
if (err) {
if (imsg.hdr.len == 0)
err = NULL;
break;
}
if (imsg_outfd.hdr.type == GOT_IMSG_STOP)
break;
if (imsg_outfd.hdr.type != GOT_IMSG_BLOB_OUTFD) {
err = got_error(GOT_ERR_PRIVSEP_MSG);
goto done;
}
datalen = imsg_outfd.hdr.len - IMSG_HEADER_SIZE;
if (datalen != 0) {
err = got_error(GOT_ERR_PRIVSEP_LEN);
goto done;
}
if (imsg_outfd.fd == -1) {
err = got_error(GOT_ERR_PRIVSEP_NO_FD);
goto done;
}
err = got_object_read_header(&obj, imsg.fd);
if (err)
goto done;
if (lseek(imsg.fd, SEEK_SET, 0) == -1) {
err = got_error_from_errno();
goto done;
}
f = fdopen(imsg.fd, "rb");
if (f == NULL) {
err = got_error_from_errno();
goto done;
}
if (obj->size <= GOT_PRIVSEP_INLINE_BLOB_DATA_MAX) {
err = got_inflate_to_mem(&buf, &size, f);
if (err)
goto done;
} else {
err = got_inflate_to_fd(&size, f, imsg_outfd.fd);
if (err)
goto done;
}
if (size < obj->hdrlen) {
err = got_error(GOT_ERR_BAD_OBJ_HDR);
goto done;
}
err = got_privsep_send_blob(&ibuf, size, obj->hdrlen, buf);
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();
}
if (imsg_outfd.fd != -1) {
if (close(imsg_outfd.fd) != 0 && err == NULL)
err = got_error_from_errno();
}
imsg_free(&imsg);
imsg_free(&imsg_outfd);
if (obj)
got_object_close(obj);
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;
}
