execle
int execle(const char *, const char *, ...);
if(execle("/bin/sh","sh",NULL, nenvp) != 0)
execle(PP, "ppplogin", ttyn, NULL, env);
execle(LO, "login", AL ? "-fp" : "-p", name,
execle(_PATH_REBOOT, "reboot", "-l", nosync,
execle(_PATH_HALT, "halt", "-l", nosync,
execle(_PATH_HALT, "halt", "-l", "-p", nosync,
execle(DSynthExecPath, DSynthExecPath,
execle(shell, shell, "-c", e->cmd, NULL, e->envp);