_rtl_close
Go Up to io.h Index
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Note: This function replaces _close which is obsolete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++ |
---|---|---|---|
+ |