100 lines
2.5 KiB
C
100 lines
2.5 KiB
C
#include <ctype.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <getopt.h>
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#include <limits.h>
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#include <linux/input.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/reboot.h>
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#include <sys/types.h>
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#include <time.h>
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#include <unistd.h>
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#include <sys/wait.h>
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#include <sys/limits.h>
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#include <dirent.h>
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#include <sys/stat.h>
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#include <signal.h>
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#include <sys/wait.h>
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#define RECOVERY_MODE_FILE "/cache/.recovery_mode"
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#define UPDATE_BINARY BOARD_HIJACK_RECOVERY_PATH"/update-binary"
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#define UPDATE_PACKAGE BOARD_HIJACK_RECOVERY_PATH"/recovery.zip"
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#define BUSYBOX BOARD_HIJACK_RECOVERY_PATH"/busybox"
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#define PREPARE_SCRIPT BOARD_HIJACK_RECOVERY_PATH"/prepare.sh"
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// This was pulled from bionic: The default system command always looks
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// for shell in /system/bin/sh. This is bad.
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#define _PATH_BSHELL BOARD_HIJACK_RECOVERY_PATH"/sh"
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extern char **environ;
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int
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__system(const char *command)
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{
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pid_t pid;
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sig_t intsave, quitsave;
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sigset_t mask, omask;
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int pstat;
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char *argp[] = {"sh", "-c", NULL, NULL};
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if (!command) /* just checking... */
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return(1);
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argp[2] = (char *)command;
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sigemptyset(&mask);
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sigaddset(&mask, SIGCHLD);
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sigprocmask(SIG_BLOCK, &mask, &omask);
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switch (pid = vfork()) {
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case -1: /* error */
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sigprocmask(SIG_SETMASK, &omask, NULL);
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return(-1);
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case 0: /* child */
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sigprocmask(SIG_SETMASK, &omask, NULL);
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execve(_PATH_BSHELL, argp, environ);
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_exit(127);
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}
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intsave = (sig_t) bsd_signal(SIGINT, SIG_IGN);
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quitsave = (sig_t) bsd_signal(SIGQUIT, SIG_IGN);
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pid = waitpid(pid, (int *)&pstat, 0);
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sigprocmask(SIG_SETMASK, &omask, NULL);
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(void)bsd_signal(SIGINT, intsave);
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(void)bsd_signal(SIGQUIT, quitsave);
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return (pid == -1 ? -1 : pstat);
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}
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int main(int argc, char** argv) {
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char* hijacked_executable = argv[0];
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struct stat info;
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if (NULL != strstr(hijacked_executable, "hijack")) {
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// no op
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printf("Hijack!\n");
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return 0;
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}
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char cmd[PATH_MAX];
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if (0 == stat(RECOVERY_MODE_FILE, &info)) {
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remove(RECOVERY_MODE_FILE);
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kill(getppid(), SIGKILL);
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sprintf(cmd, "%s 2 0 %s", UPDATE_BINARY, UPDATE_PACKAGE);
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return __system(cmd);
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}
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sprintf(cmd, "%s.bin", hijacked_executable);
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int i;
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for (i = 1; i < argc; i++) {
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strcat(cmd, " '");
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strcat(cmd, argv[i]);
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strcat(cmd, "'");
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}
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__system(PREPARE_SCRIPT);
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return __system(cmd);
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}
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