117 lines
3.0 KiB
C
117 lines
3.0 KiB
C
/*
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* This file is part of MultiROM.
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*
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* MultiROM is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* MultiROM 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with MultiROM. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdlib.h>
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#include <unistd.h>
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#include <cutils/android_reboot.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <sys/mount.h>
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#include <string.h>
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#include <errno.h>
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#include <time.h>
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#include "multirom.h"
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#include "lib/framebuffer.h"
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#include "lib/log.h"
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#include "version.h"
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#include "lib/util.h"
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#include "lib/mrom_data.h"
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#define EXEC_MASK (S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH)
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#define KEEP_REALDATA "/dev/.keep_realdata"
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#define REALDATA "/realdata"
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static void do_kexec(void)
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{
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emergency_remount_ro();
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execl("/kexec", "/kexec", "-e", NULL);
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ERROR("kexec -e failed! (%d: %s)", errno, strerror(errno));
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while(1);
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}
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int main(int argc, const char *argv[])
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{
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int i;
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const char *rom_to_boot = NULL;
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for(i = 1; i < argc; ++i)
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{
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if(strcmp(argv[i], "-v") == 0)
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{
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printf("%d%s\n", VERSION_MULTIROM, VERSION_DEV_FIX);
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fflush(stdout);
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return 0;
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}
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else if(strncmp(argv[i], "--boot-rom=", sizeof("--boot-rom")) == 0)
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{
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rom_to_boot = argv[i] + sizeof("--boot-rom");
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}
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}
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srand(time(0));
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klog_init();
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// output all messages to dmesg,
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// but it is possible to filter out INFO messages
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klog_set_level(6);
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mrom_set_log_tag("multirom");
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ERROR("Running MultiROM v%d%s\n", VERSION_MULTIROM, VERSION_DEV_FIX);
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// root is mounted read only in android and MultiROM uses
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// it to store some temp files, so remount it.
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// Yes, there is better solution to this.
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if(rom_to_boot)
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mount(NULL, "/", NULL, MS_REMOUNT, NULL);
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int exit = multirom(rom_to_boot);
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if(rom_to_boot)
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mount(NULL, "/", NULL, MS_RDONLY | MS_REMOUNT, NULL);
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if(exit >= 0)
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{
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if(exit & EXIT_REBOOT_RECOVERY)
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do_reboot(REBOOT_RECOVERY);
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else if(exit & EXIT_REBOOT_BOOTLOADER)
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do_reboot(REBOOT_BOOTLOADER);
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else if(exit & EXIT_SHUTDOWN)
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do_reboot(REBOOT_SHUTDOWN);
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else if(exit & EXIT_REBOOT)
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do_reboot(REBOOT_SYSTEM);
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if(exit & EXIT_KEXEC)
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{
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do_kexec();
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return 0;
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}
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// indicates trampoline to keep /realdata mounted
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if(!(exit & EXIT_UMOUNT))
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close(open(KEEP_REALDATA, O_WRONLY | O_CREAT, 0000));
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}
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vt_set_mode(0);
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return 0;
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}
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