int main(int argc,char *argv[])
{
int i;
char *buf = NULL;
int argcount = 0;
char arglist[100][256];
char *arg[20];
int pid;
int stat_val;
buf = (char *)malloc(256);
while(1)
{
memset(buf,0,256);
my_print();
// fflush(NULL);
//处理输入参数的部分
get_input(buf);
for(i = 0;i < 100;i++)
{
arglist[i][0] = '\0';
}
argcount = 0;
explain_input(buf,&argcount,arglist);
for(i = 0;i < argcount;i++)
arg[i] = &arglist[i][0];
for(i = 0;i < argcount;i++)
printf("%s ",arg[i]);
if((pid = fork()) < 0)
{
perror("fork error");
return 0;
}
switch(pid)
{
case 0:
execvp(arg[0],arg);
exit(0);
break;
default:
if(waitpid(0,&stat_val,0) == -1)
perror("error");
}
}
exit(0);
}
int main(int argc ,char **argv)
{
int i;
int argcount = 0;
char arglist[100][256];
char **arg =NULL;
char *buf = NULL;
buf =(char *)malloc (256);
if(buf == NULL){
perror("malloc failed ");
exit(-1 );
}
while(1){
//将buf所指向的空间清零
memset(buf ,0 , 256);
printf_prompt();
get_input( buf);
//若输入的命令为exit或logout则退出本程序
if(strcmp(buf , "exit\n") == 0 || strcmp(buf , "logout\n") == 0)
break ;
for ( i=0 ; i <100 ;i++ )
{
arglist[i][0] = '\0';
}
argcount = 0;
explain_input(buf,&argcount,arglist);
do_cmd(argcount ,arglist );
}
if(buf != NULL ) {
free(buf );
buf = NULL;
}
exit(0);
}
