userin.c

LINUX下VI编写的SHELL工具LINUX下VI编写的SHELL工具

#include "smallsh.h"

char inpbuf[MAXBUF],tokbuf[2*MAXBUF],*ptr = inpbuf,*tok = tokbuf;

int userin(char *p)
{
	int c,count;      
 	printf("%s",p);         
  	count = 0;         
	while(1)
	{
		if((c = getchar()) == EOF)
			return(EOF);                  
   		if(count < MAXBUF - 1)
     		inpbuf[count++] = c;                  
       	if(c == '\n')
        {
        	inpbuf[count] = '\0';
         	return count;
        }
        printf("smallsh: input line too long \n");
        count = 0;
        printf("%s",p);                
	}
}

//gettok.c


int gettok(char **outptr)
{
	int type;
 	*outptr = tok;
  	while(*ptr == ' ' || *ptr == '\t')
   		ptr++;
  	*tok++ = *ptr;
         
 	switch(*ptr++)
  	{
   		case '\n':
     		type = EOL; break;
         case '&':
         	type= SEMICOLON; break;
         default:
         	type = ARG;
          	while(inarg(*ptr))
           		*tok++ = *ptr++;
     }
     *tok++ = '\0';
     return type;
}