_rtl_close

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Header File

io.h

Category

Input/output Routines

Prototype

int _rtl_close(int handle);

Description

Closes a file.

Note: This function replaces _close which is obsolete

The _rtl_close function closes the file associated with handle, a file handle obtained from a call to creat, creatnew, creattemp, dup, dup2, open, _rtl_creat, or _rtl_open.

It does not write a Ctrl-Z character at the end of the file. If you want to terminate the file with a Ctrl-Z, you must explicitly output one.

Return Value

On success, _rtl_close returns 0.

On error (if it fails because handle is not the handle of a valid, open file), _rtl_close returns a value of -1 and the global variable errno is set to

EBADF

Bad file number



Example

#include <string.h>
#include <stdio.h>
#include <fcntl.h>
#include <io.h>
int main(void)
{
   int handle;
   char msg[] = "Hello world";
   if ((handle = _rtl_open("TEST.$$$", O_RDWR)) == -1)
   {
      perror("Error:");
      return 1;
   }
   _rtl_write(handle, msg, strlen(msg));
   _rtl_close(handle);
   return 0;
}

Portability

POSIX Win32 ANSI C ANSI C++

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