Renaming a file in c

 In this post we will find how to rename and move a file in the same drive using c language....
This can be done in c using the rename() function..The prototype of rename is:

int rename(const *char oldname,const *char newname);

On sucess--it returns 0,

On error---it returns -1;

Let us take an example:

#include <stdio.h>
#include<conio.h>
#include<errno.h>

int main(void)
{
   char oldname[80], newname[80];
   int i;
   clrscr();
   printf("Enter File to rename: ");
   gets(oldname);
   printf("\nEnter New name: ");
   gets(newname);
   i=rename(oldname, newname);
     if(i==0)
     {
     printf("rename done");
     }

  else
     {
     if(errno==ENOENT){printf("no such file/directory exists");}
     if(errno==EACCES){printf("access denied");}
     if(errno==ENOTSAM){printf("Drive is not same");}
     }
getch();
   return 0;
}

Let us find the output for different inputs

output:

Enter  File to rename:c:\test.txt

Enter New name:c:\go.txt

rename done

Explanation:it will sucessfully rename the file test to go in the c drive

output:

Enter  File to rename:d:\test.txt

Enter New name:c:\go.txt

Drive is not same

Explanation:Using rename function u can only work within a drive

output:

Enter  File to rename:d:\test.txt

Enter New name:d:\moveinthis\go.txt

rename done

Explanation:You can move the file from one directory to another directory using rename but the condition is that the directories must be in the same drive......

output:

Enter  File to rename:d:\ex.txt

Enter New name:d:\moveinthis\go.txt

no such file/directory exists

Explanation:This message will come if there is no file named as ex.txt present in the d drive......

output:

Enter  File to rename:c:\temp

Enter New name:c:\check

rename done

Explanation:We can rename also a directory  using the rename function,but still the condition is we must work in the same drive.....