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Diffstat (limited to 'src/shared/util.c')
-rw-r--r--src/shared/util.c103
1 files changed, 68 insertions, 35 deletions
diff --git a/src/shared/util.c b/src/shared/util.c
index 020c1da7a9..0cc51e0962 100644
--- a/src/shared/util.c
+++ b/src/shared/util.c
@@ -6091,60 +6091,93 @@ int container_get_leader(const char *machine, pid_t *pid) {
return 0;
}
-int namespace_open(pid_t pid, int *pidns_fd, int *mntns_fd, int *root_fd) {
- _cleanup_close_ int pidnsfd = -1, mntnsfd = -1;
- const char *pidns, *mntns, *root;
+int namespace_open(pid_t pid, int *pidns_fd, int *mntns_fd, int *netns_fd, int *root_fd) {
+ _cleanup_close_ int pidnsfd = -1, mntnsfd = -1, netnsfd = -1;
int rfd;
assert(pid >= 0);
- assert(pidns_fd);
- assert(mntns_fd);
- assert(root_fd);
- mntns = procfs_file_alloca(pid, "ns/mnt");
- mntnsfd = open(mntns, O_RDONLY|O_NOCTTY|O_CLOEXEC);
- if (mntnsfd < 0)
- return -errno;
+ if (mntns_fd) {
+ const char *mntns;
- pidns = procfs_file_alloca(pid, "ns/pid");
- pidnsfd = open(pidns, O_RDONLY|O_NOCTTY|O_CLOEXEC);
- if (pidnsfd < 0)
- return -errno;
+ mntns = procfs_file_alloca(pid, "ns/mnt");
+ mntnsfd = open(mntns, O_RDONLY|O_NOCTTY|O_CLOEXEC);
+ if (mntnsfd < 0)
+ return -errno;
+ }
- root = procfs_file_alloca(pid, "root");
- rfd = open(root, O_RDONLY|O_NOCTTY|O_CLOEXEC|O_DIRECTORY);
- if (rfd < 0)
- return -errno;
+ if (pidns_fd) {
+ const char *pidns;
+
+ pidns = procfs_file_alloca(pid, "ns/pid");
+ pidnsfd = open(pidns, O_RDONLY|O_NOCTTY|O_CLOEXEC);
+ if (pidnsfd < 0)
+ return -errno;
+ }
+
+ if (netns_fd) {
+ const char *netns;
+
+ netns = procfs_file_alloca(pid, "ns/net");
+ netnsfd = open(netns, O_RDONLY|O_NOCTTY|O_CLOEXEC);
+ if (netnsfd < 0)
+ return -errno;
+ }
+
+ if (root_fd) {
+ const char *root;
+
+ root = procfs_file_alloca(pid, "root");
+ rfd = open(root, O_RDONLY|O_NOCTTY|O_CLOEXEC|O_DIRECTORY);
+ if (rfd < 0)
+ return -errno;
+ }
+
+ if (pidns_fd)
+ *pidns_fd = pidnsfd;
- *pidns_fd = pidnsfd;
- *mntns_fd = mntnsfd;
- *root_fd = rfd;
- pidnsfd = -1;
- mntnsfd = -1;
+ if (mntns_fd)
+ *mntns_fd = mntnsfd;
+
+ if (netns_fd)
+ *netns_fd = netnsfd;
+
+ if (root_fd)
+ *root_fd = rfd;
+
+ pidnsfd = mntnsfd = netnsfd = -1;
return 0;
}
-int namespace_enter(int pidns_fd, int mntns_fd, int root_fd) {
- assert(pidns_fd >= 0);
- assert(mntns_fd >= 0);
- assert(root_fd >= 0);
+int namespace_enter(int pidns_fd, int mntns_fd, int netns_fd, int root_fd) {
- if (setns(pidns_fd, CLONE_NEWPID) < 0)
- return -errno;
+ if (pidns_fd >= 0)
+ if (setns(pidns_fd, CLONE_NEWPID) < 0)
+ return -errno;
- if (setns(mntns_fd, CLONE_NEWNS) < 0)
- return -errno;
+ if (mntns_fd >= 0)
+ if (setns(mntns_fd, CLONE_NEWNS) < 0)
+ return -errno;
- if (fchdir(root_fd) < 0)
- return -errno;
+ if (netns_fd >= 0)
+ if (setns(netns_fd, CLONE_NEWNET) < 0)
+ return -errno;
- if (chroot(".") < 0)
- return -errno;
+ if (root_fd >= 0) {
+ if (fchdir(root_fd) < 0)
+ return -errno;
+
+ if (chroot(".") < 0)
+ return -errno;
+ }
if (setresgid(0, 0, 0) < 0)
return -errno;
+ if (setgroups(0, NULL) < 0)
+ return -errno;
+
if (setresuid(0, 0, 0) < 0)
return -errno;