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/* uroot - User's root
* main.c Source file with main function
*
* Copyright (C) 2018 Karel Kočí
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program 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 General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#define _GNU_SOURCE
#include <stdio.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <sched.h>
#include <unistd.h>
#include <stdint.h>
#include <stdbool.h>
#include "child.h"
#include "utils.h"
#include "sigpipe.h"
#include "conf.h"
int main(int argc, char **argv) {
// TODO arguments parsing
struct child_args chargs = (struct child_args) {
.ppid = getpid(),
.argc = argc,
.argv = argv,
.sigpipe = sigpipe_new()
};
uint8_t stack[STACK_SIZE];
pid_t chpid = clone(child_main, stack + STACK_SIZE,
SIGCHLD | CLONE_NEWNS | CLONE_NEWUSER | CLONE_NEWPID,
&chargs);
#define FAIL(MSG) do { fputs(MSG, stderr); kill(chpid, SIGKILL); return 1; } while (false);
if (new_map_id("uid", chpid, getuid()))
FAIL("Mapping of uid failed!\n");
if (new_map_id("gid", chpid, getgid()))
FAIL("Mapping of gid failed!\n");
sigpipe_signal(chargs.sigpipe);
int stat;
waitpid(chpid, &stat, 0);
if (WIFEXITED(stat))
return WEXITSTATUS(stat);
else
return WIFSIGNALED(stat) || WCOREDUMP(stat);
}
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