busybox/coreutils/chroot.c
Denis Vlasenko 9b49a5ed85 add -fvisibility=hidden to CC flags, mark XXX_main functions
EXTERNALLY_VISIBLE. 5% size reduction of libbusybox.so
2007-10-11 10:05:36 +00:00

40 lines
802 B
C

/* vi: set sw=4 ts=4: */
/*
* Mini chroot implementation for busybox
*
* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
*
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
/* BB_AUDIT SUSv3 N/A -- Matches GNU behavior. */
#include "libbb.h"
int chroot_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int chroot_main(int argc, char **argv)
{
if (argc < 2) {
bb_show_usage();
}
++argv;
if (chroot(*argv)) {
bb_perror_msg_and_die("cannot change root directory to %s", *argv);
}
xchdir("/");
++argv;
if (argc == 2) {
argv -= 2;
argv[0] = getenv("SHELL");
if (!argv[0]) {
argv[0] = (char *) DEFAULT_SHELL;
}
argv[1] = (char *) "-i";
}
BB_EXECVP(*argv, argv);
bb_perror_msg_and_die("cannot execute %s", *argv);
}