This documentation is archived and is not being maintained.


Set the value of the errno global variable.

errno_t _set_errno( 
   int value 

[in] value

The new value of errno.

Returns zero if successful.

Possible values are defined in Errno.h. Also, see errno Constants.

// crt_set_errno.c
#include <stdio.h>
#include <errno.h>

int main()
   _set_errno( EILSEQ );
   perror( "Oops" );
Oops: Illegal byte sequence


Required header

Optional header




For more compatibility information, see Compatibility in the Introduction.