#include "lab07b.h"

int main(){ char *type,*readok,*execok,*writeok; char line[40],buf[100]; bzero(buf,100); char filename[50]; struct stat stat1; int fp;

printf("enter a file name : "); scanf("%s" , filename);

if (stat(filename, &stat1)<0) { write(1,"File doesnot exist!! ",22); exit(1); }

fp=open(filename,O_RDWR | O_APPEND);

stat(filename,&stat1);

if(S_ISREG(stat1.st_mode)) type = "regular";

else if(S_ISDIR(stat1.st_mode)) type = "directory";

else type= "Other";

printf("type is %s ",type);

if((stat1.st_mode&S_IRUSR)){ readok ="user can read the file"; }else{ readok ="user cannot read the file";} //=================== if((stat1.st_mode&S_IWUSR)) writeok ="user can write the file"; else writeok ="user cannot write the file";

//=========================== if((stat1.st_mode&S_IXUSR)) execok ="user can execute the file"; else execok ="user cannot execute the file";

printf("%s %s %s ",readok,writeok,execok);

//===================================

if((stat1.st_mode&S_IRGRP)) readok ="GROUP can read the file"; else readok ="GROUP cannot read the file";

//================ if((stat1.st_mode&S_IWGRP)) writeok ="GROUP can write the file"; else writeok ="GROUP cannot write the file";

//================= if((stat1.st_mode&S_IXGRP)) execok ="GROUP can execute the file"; else execok ="GROUP cannot execute the file";

printf("%s %s %s ",readok,writeok,execok); //===========================================

if((stat1.st_mode&S_IROTH)) readok ="OTHER can read the file"; else readok ="OTHER cannot read the file"; //=========================

if((stat1.st_mode&S_IWOTH)) writeok ="OTHER can write the file"; else writeok ="OTHER cannot write the file";

//============================== if((stat1.st_mode&S_IXOTH)) execok ="OTHER can execute the file"; else execok ="OTHER cannot execute the file";

printf("%s %s %s ",readok,writeok,execok);

if(strcmp(type,"regular")==0){

write(1,"Enter a line: ",15); bzero(line,40); read(0,line,40); lseek(fp, 0,SEEK_END); write(fp,line,strlen(line));

lseek(fp,0,SEEK_END); bzero(buf,100); read(fp,buf,100); write(1,buf,100);

}

close(fp);

return 0; }

#Question : Rewrite the above program to use only RIO I/O functions . do not use Unix I/O (for reading and writing ) nor C standard I/O functions save file as "lab07f.c"

(in C programming language ) computer system please help thanks