void execCom(int in,int out,char** args){
pid_t child_id;
if(strcmp(args[0],"pwd")==0){
myPwd(out,args[0]);
}else if(strcmp(args[0],"cd")==0){
myCd(args[0]);
}else{
child_id=fork();
if(child_id==0){
int error=child(in,out,args);
if(error<0){
printf("execCom:%s failed!\n",args[0]);
}
}
}
}
void commandExecute()
{
struct timeval tv_beg;
struct timeval tv_end;
struct timezone tz_beg;
struct timezone tz_end;
int temp = -1;
int process_pid = 0,process_pid2=0;
int status = 0;
int walk_clock_time = 0;
int i = 0;
//printf("%d\n",backFlag);
while(1)
{
//获取进程运行前系统时间
gettimeofday(&tv_beg, &tz_beg);
//获取命令
getCommand();
//判断是第几个命令
for(i=0; i<COMMAND_NUM; i++)
{
if(strcmp(shellCommand, commandKind[i]) == 0)
{
temp = i;
break;
}
}
if(backFlag)
{
init_daemon();
}
switch(temp)
{
case 0:
//printf("%d\n",temp);
myCd();
break;
case 1:
//printf("%d\n",temp);
getcwd(shell_args, PATH_LEN);//get the current directory
myLs(shell_args);
break;
case 2:
//printf("%d\n",temp);
printf("等待后台进程.... \n");
waitpid(-1, &status, 0);
printf("所有后台进程运行结束! \n");
return;
case -1:
//printf("%d\n",temp);
process_pid=fork();
if(process_pid==0)
{
printf("other command\n");
externalCmd();
showStatic();
exit(0);
}
else waitpid(process_pid, &status, 0);
break;
default:
continue;
}
temp=-1;
//获取进程运行后系统时间
gettimeofday(&tv_end, &tz_end);
walk_clock_time = (tv_end.tv_sec - tv_beg.tv_sec)*1000 + (tv_end.tv_usec - tv_beg.tv_usec)/1000;
printf("\n");
printf("进程运行时间 (ms): %d \n", walk_clock_time);
showStatic();
if(backFlag)
{
}
}
}
