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https://github.com/checkpoint-restore/criu
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5cae819d8c
O_RSTR flag should be used instead for regular open_image Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
77 lines
1.4 KiB
C
77 lines
1.4 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 "crtools.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_pid, struct cr_fdset *fdset)
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{
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int ret;
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struct utsname ubuf;
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UtsnsEntry ue = UTSNS_ENTRY__INIT;
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ret = switch_ns(ns_pid, &uts_ns_desc, NULL);
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if (ret < 0)
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return ret;
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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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return ret;
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}
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ue.nodename = ubuf.nodename;
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ue.domainname = ubuf.domainname;
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return pb_write_one(fdset_fd(fdset, CR_FD_UTSNS), &ue, PB_UTSNS);
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}
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int prepare_utsns(int pid)
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{
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int fd, ret;
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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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fd = open_image(CR_FD_UTSNS, O_RSTR, pid);
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if (fd < 0)
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return -1;
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ret = pb_read_one(fd, &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(fd);
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return ret;
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}
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void show_utsns(int fd, struct cr_options *o)
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{
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pb_show_vertical(fd, PB_UTSNS);
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}
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struct ns_desc uts_ns_desc = {
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.cflag = CLONE_NEWUTS,
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.str = "uts",
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};
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