rm.c

This is to bulid a sample linux shell.

#include<stdio.h>
#include<unistd.h>
#include<string.h>

int main(int argc,char *argv[])
{
	char ch;
	int i;
	FILE *fp;
	if(argc < 2)
	{
		printf("daemon: Insufficient Arguments.\n");
		return(0);
	}
	if(argc > 2 )
	{		
		for(i = 1;i < argc;i++)
		{
			fp=fopen(argv[i],"r");
			if(fp!=NULL)
			{
				unlink(argv[i]);
				fclose(fp);
			}
			else
				printf("daemon: %s file not found.\n",argv[i]);			
		}
		return 0;
	}
	fp=fopen(argv[1],"r");
	if(fp!=NULL)
	{
		unlink(argv[1]);
		fclose(fp);
	}
	else
		printf("daemon: %s file not found.\n",argv[1]);
	return 0;
}