mirror of
https://github.com/checkpoint-restore/criu.git
synced 2026-01-23 02:14:37 +00:00
72 lines
1.3 KiB
C
72 lines
1.3 KiB
C
#include <unistd.h>
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#include <fcntl.h>
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#include <sys/utsname.h>
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#include <string.h>
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#include "util.h"
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#include "syscall.h"
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#include "namespaces.h"
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#include "sysctl.h"
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#include "uts_ns.h"
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#include "protobuf.h"
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#include "protobuf/utsns.pb-c.h"
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int dump_uts_ns(int ns_id)
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{
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int ret;
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struct cr_img *img;
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struct utsname ubuf;
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UtsnsEntry ue = UTSNS_ENTRY__INIT;
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img = open_image(CR_FD_UTSNS, O_DUMP, ns_id);
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if (!img)
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return -1;
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ret = uname(&ubuf);
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if (ret < 0) {
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pr_perror("Error calling uname");
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goto err;
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}
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ue.nodename = ubuf.nodename;
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ue.domainname = ubuf.domainname;
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ret = pb_write_one(img, &ue, PB_UTSNS);
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err:
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close_image(img);
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return ret < 0 ? -1 : 0;
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}
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int prepare_utsns(int pid)
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{
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int ret;
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struct cr_img *img;
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UtsnsEntry *ue;
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struct sysctl_req req[3] = {
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{ "kernel/hostname" },
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{ "kernel/domainname" },
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{ },
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};
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img = open_image(CR_FD_UTSNS, O_RSTR, pid);
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if (!img)
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return -1;
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ret = pb_read_one(img, &ue, PB_UTSNS);
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if (ret < 0)
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goto out;
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req[0].arg = ue->nodename;
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req[0].type = CTL_STR(strlen(ue->nodename));
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req[1].arg = ue->domainname;
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req[1].type = CTL_STR(strlen(ue->domainname));
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ret = sysctl_op(req, CTL_WRITE);
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utsns_entry__free_unpacked(ue, NULL);
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out:
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close_image(img);
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return ret;
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}
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struct ns_desc uts_ns_desc = NS_DESC_ENTRY(CLONE_NEWUTS, "uts");
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