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service: service should compile on Ubuntu 14.04

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I'm not quite sure what the difference is (I have gcc 4.8, but there are
probably also header differences), but when I compile the service on 14.04 I
get:

  CC       cr-service.o
cr-service.c: In function ‘start_page_server_req’:
cr-service.c:536:8: error: ignoring return value of ‘write’, declared with attribute warn_unused_result [-Werror=unused-result]
   write(start_pipe[1], &ret, sizeof(ret));
        ^
cr-service.c:544:6: error: ignoring return value of ‘read’, declared with attribute warn_unused_result [-Werror=unused-result]
  read(start_pipe[0], &ret, sizeof(ret));
      ^

Signed-off-by: Tycho Andersen <tycho.andersen@canonical.com>
Tested-by: https://travis-ci.org/avagin/criu/builds/34990769
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
This commit is contained in:
Tycho Andersen
2014-09-10 19:46:00 +04:00
committed by Pavel Emelyanov
parent 7493eef982
commit 32b032b61c
1 changed files with 8 additions and 3 deletions
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11
cr-service.c
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@@ -506,6 +506,7 @@ static int pre_dump_loop(int sk, CriuReq *msg)
static int start_page_server_req(int sk, CriuOpts *req)
{
int ret, pid, start_pipe[2];
ssize_t count;
bool success = false;
CriuResp resp = CRIU_RESP__INIT;
CriuPageServerInfo ps = CRIU_PAGE_SERVER_INFO__INIT;
@@ -533,16 +534,20 @@ static int start_page_server_req(int sk, CriuOpts *req)
ret = cr_page_server(true, start_pipe[1]);
out_ch:
write(start_pipe[1], &ret, sizeof(ret));
count = write(start_pipe[1], &ret, sizeof(ret));
close(start_pipe[1]);
if (count != sizeof(ret))
exit(1);
exit(0);
}
close(start_pipe[1]);
wait(NULL);
ret = -1;
read(start_pipe[0], &ret, sizeof(ret));
if (ret > 0) {
count = read(start_pipe[0], &ret, sizeof(ret));
if (count != sizeof(ret))
success = false;
else if (ret > 0) {
success = true;
ps.has_pid = true;
ps.pid = ret;