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/* Copyright 2012 The ChromiumOS Authors
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include <dlfcn.h>
#include <err.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "libminijail.h"
#include "elfparse.h"
#include "minijail0_cli.h"
#include "util.h"
int main(int argc, char *argv[], char *environ[])
{
struct minijail *j = minijail_new();
const char *dl_mesg = NULL;
const char *preload_path = PRELOADPATH;
int exit_immediately = 0;
ElfType elftype = ELFERROR;
char **envp = NULL;
int consumed = parse_args(j, argc, argv, environ,
&exit_immediately, &elftype,
&preload_path, &envp);
argc -= consumed;
argv += consumed;
/*
* Make the process group ID of this process equal to its PID.
* In the non-interactive case (e.g. when minijail0 is started from
* init) this ensures the parent process and the jailed process
* can be killed together.
*
* Don't fail on EPERM, since setpgid(0, 0) can only EPERM when
* the process is already a process group leader.
*/
if (setpgid(0 /* use calling PID */, 0 /* make PGID = PID */)) {
if (errno != EPERM)
err(1, "setpgid(0, 0) failed");
}
if (elftype == ELFSTATIC) {
/*
* Target binary is statically linked so we cannot use
* libminijailpreload.so.
*/
minijail_run_no_preload(j, argv[0], argv);
} else if (elftype == ELFDYNAMIC) {
/*
* Target binary is dynamically linked so we can
* inject libminijailpreload.so into it.
*/
/* Check that we can dlopen() libminijailpreload.so. */
if (!dlopen(preload_path, RTLD_LAZY | RTLD_LOCAL)) {
dl_mesg = dlerror();
errx(1, "dlopen(): %s", dl_mesg);
return 1;
}
minijail_set_preload_path(j, preload_path);
if (envp) {
minijail_run_env(j, argv[0], argv, envp);
} else {
minijail_run(j, argv[0], argv);
}
} else {
errx(1, "Target program '%s' is not a valid ELF file", argv[0]);
}
if (exit_immediately)
return 0;
int ret = minijail_wait(j);
#if defined(__SANITIZE_ADDRESS__)
minijail_destroy(j);
#endif /* __SANITIZE_ADDRESS__ */
return ret;
}
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