X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=src%2Flibsystemd-bus%2Fbus-container.c;fp=src%2Flibsystemd-bus%2Fbus-container.c;h=eac1863244106a93aa42e5017a4afed2e8cf1874;hb=a7893c6b28772edbc7e1fea3c209caa54d465648;hp=0000000000000000000000000000000000000000;hpb=0f8bd8debb0ff7f5bff7738841931f6c41e40bc1;p=elogind.git
diff --git a/src/libsystemd-bus/bus-container.c b/src/libsystemd-bus/bus-container.c
new file mode 100644
index 000000000..eac186324
--- /dev/null
+++ b/src/libsystemd-bus/bus-container.c
@@ -0,0 +1,128 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+ This file is part of systemd.
+
+ Copyright 2013 Lennart Poettering
+
+ systemd is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2.1 of the License, or
+ (at your option) any later version.
+
+ systemd is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with systemd; If not, see .
+***/
+
+#include
+#include
+
+#include "util.h"
+#include "fileio.h"
+#include "bus-internal.h"
+#include "bus-socket.h"
+#include "bus-container.h"
+
+int bus_container_connect(sd_bus *b) {
+ _cleanup_free_ char *p = NULL, *s = NULL, *ns = NULL, *root = NULL, *class = NULL;
+ _cleanup_close_ int nsfd = -1, rootfd = -1;
+ siginfo_t si;
+ pid_t leader, child;
+ int r;
+
+ assert(b);
+ assert(b->input_fd < 0);
+ assert(b->output_fd < 0);
+
+ p = strappend("/run/systemd/machines/", b->machine);
+ if (!p)
+ return -ENOMEM;
+
+ r = parse_env_file(p, NEWLINE, "LEADER", &s, "CLASS", &class, NULL);
+ if (r < 0)
+ return r;
+ if (!s)
+ return -EIO;
+
+ if (!streq_ptr(class, "container"))
+ return -EIO;
+
+ r = parse_pid(s, &leader);
+ if (r < 0)
+ return r;
+ if (leader <= 1)
+ return -EIO;
+
+ r = asprintf(&ns, "/proc/%lu/ns/mnt", (unsigned long) leader);
+ if (r < 0)
+ return -ENOMEM;
+
+ nsfd = open(ns, O_RDONLY|O_NOCTTY|O_CLOEXEC);
+ if (nsfd < 0)
+ return -errno;
+
+ r = asprintf(&root, "/proc/%lu/root", (unsigned long) leader);
+ if (r < 0)
+ return -ENOMEM;
+
+ rootfd = open(root, O_RDONLY|O_NOCTTY|O_CLOEXEC);
+ if (rootfd < 0)
+ return -errno;
+
+ b->input_fd = socket(b->sockaddr.sa.sa_family, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
+ if (b->input_fd < 0)
+ return -errno;
+
+ b->output_fd = b->input_fd;
+
+ r = bus_socket_setup(b);
+ if (r < 0)
+ return r;
+
+ child = fork();
+ if (child < 0)
+ return -errno;
+
+ if (child == 0) {
+ r = setns(nsfd, CLONE_NEWNS);
+ if (r < 0)
+ _exit(255);
+
+ if (fchdir(rootfd) < 0)
+ _exit(255);
+
+ if (chroot(".") < 0)
+ _exit(255);
+
+
+ r = connect(b->input_fd, &b->sockaddr.sa, b->sockaddr_size);
+ if (r < 0) {
+ if (errno == EINPROGRESS)
+ _exit(1);
+
+ _exit(255);
+ }
+
+ _exit(0);
+ }
+
+ r = wait_for_terminate(child, &si);
+ if (r < 0)
+ return r;
+
+ if (si.si_code != CLD_EXITED)
+ return -EIO;
+
+ if (si.si_status == 1)
+ return 1;
+
+ if (si.si_status != 0)
+ return -EIO;
+
+ return bus_socket_start_auth(b);
+}