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* lxc: linux Container library
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* (C) Copyright IBM Corp. 2007, 2010
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* Daniel Lezcano <dlezcano at fr.ibm.com>
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#include <sys/param.h>
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#include <sys/types.h>
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#include "arguments.h"
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#include "namespace.h"
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lxc_log_define(lxc_attach_ui, lxc);
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static const struct option my_longopts[] = {
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static struct lxc_arguments my_args = {
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.progname = "lxc-attach",
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Execute the specified command - enter the container NAME\n\
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-n, --name=NAME NAME for name of the container\n",
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.options = my_longopts,
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int main(int argc, char *argv[], char *envp[])
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struct passwd *passwd;
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ret = lxc_arguments_parse(&my_args, argc, argv);
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ret = lxc_log_init(my_args.log_file, my_args.log_priority,
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my_args.progname, my_args.quiet);
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pid = get_init_pid(my_args.name);
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ERROR("failed to get the init pid");
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curdir = get_current_dir_name();
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ret = lxc_attach(pid);
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ERROR("failed to enter the namespace");
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if (curdir && chdir(curdir))
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WARN("could not change directory to '%s'", curdir);
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SYSERROR("failed to fork");
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if (waitpid(pid, &status, 0) < 0) {
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SYSERROR("failed to wait '%d'", pid);
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if (WIFEXITED(status))
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return WEXITSTATUS(status);
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execve(my_args.argv[0], my_args.argv, envp);
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SYSERROR("failed to exec '%s'", my_args.argv[0]);
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passwd = getpwuid(uid);
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SYSERROR("failed to get passwd " \
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"entry for uid '%d'", uid);
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char *const args[] = {
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execve(args[0], args, envp);
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SYSERROR("failed to exec '%s'", args[0]);