extern "C" int execve (const char *filename, char *const argv[],
char *const envp[])
{
if (isPerformingCkptRestart()) {
return _real_execve(filename, argv, envp);
}
JTRACE("execve() wrapper") (filename);
/* Acquire the wrapperExeution lock to prevent checkpoint to happen while
* processing this system call.
*/
WRAPPER_EXECUTION_GET_EXCL_LOCK();
dmtcp::vector<dmtcp::string> origUserEnv = copyUserEnv(envp);
char *newFilename;
char **newArgv;
dmtcpPrepareForExec(filename, argv, &newFilename, &newArgv);
dmtcp::vector<const char*> envVect = patchUserEnv(origUserEnv);
int retVal = _real_execve (newFilename, newArgv, (char* const*)&envVect[0]);
dmtcpProcessFailedExec(filename, newArgv);
WRAPPER_EXECUTION_RELEASE_EXCL_LOCK();
return retVal;
}
// Stop calls to outside executables.
int execve(const char*filename, char *const argv[], char *const envp[]) {
if (action==A_HALT) exit(0);
if (has_run_access(filename)) {
sb_log(4, "Allowing \"%s\" to be execve", filename);
return _real_execve(filename, argv, envp);
}
sb_log(0, "Attempt to execve(%s).", filename);
if (action==A_WARN) return 0;
errno=EACCES;
return -1;
}
