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#include <unistd.h>
#include <fcntl.h>
#include <sys/utsname.h>
#include <string.h>
#include <sched.h>
#include "util.h"
#include "namespaces.h"
#include "sysctl.h"
#include "uts_ns.h"
#include "protobuf.h"
#include "images/utsns.pb-c.h"
int dump_uts_ns(int ns_id)
{
int ret;
struct cr_img *img;
struct utsname ubuf;
UtsnsEntry ue = UTSNS_ENTRY__INIT;
img = open_image(CR_FD_UTSNS, O_DUMP, ns_id);
if (!img)
return -1;
ret = uname(&ubuf);
if (ret < 0) {
pr_perror("Error calling uname");
goto err;
}
ue.nodename = ubuf.nodename;
ue.domainname = ubuf.domainname;
ret = pb_write_one(img, &ue, PB_UTSNS);
err:
close_image(img);
return ret < 0 ? -1 : 0;
}
int prepare_utsns(int pid)
{
int ret;
struct cr_img *img;
UtsnsEntry *ue;
struct sysctl_req req[] = {
{ "kernel/hostname" },
{ "kernel/domainname" },
};
img = open_image(CR_FD_UTSNS, O_RSTR, pid);
if (!img)
return -1;
ret = pb_read_one(img, &ue, PB_UTSNS);
if (ret < 0)
goto out;
req[0].arg = ue->nodename;
req[0].type = CTL_STR(strlen(ue->nodename));
req[1].arg = ue->domainname;
req[1].type = CTL_STR(strlen(ue->domainname));
ret = sysctl_op(req, ARRAY_SIZE(req), CTL_WRITE, CLONE_NEWUTS);
utsns_entry__free_unpacked(ue, NULL);
out:
close_image(img);
return ret;
}
struct ns_desc uts_ns_desc = NS_DESC_ENTRY(CLONE_NEWUTS, "uts");
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