sethostent() — Open the host information data set

Standards

Standards / Extensions C or C++ Dependencies

XPG4.2
Single UNIX Specification, Version 3

 both  

Format

X/Open: 
#define _XOPEN_SOURCE_EXTENDED 1
#include <netdb.h>

void sethostent(int stayopen);
Berkeley sockets: 
#define _OE_SOCKETS
#include <netdb.h>

void sethostent(int stayopen);

General description

The sethostent() function opens and rewinds the local host tables. If the stayopen flag is nonzero, the local host tables remain open after each call.

You can use the X_SITE environment variable to specify different local host tables and override those supplied by the z/OS global resolver during initialization.
Note: For more information on these local host tables or the environment variables, see z/OS V2R1.0 Communications Server: IP Configuration Guide.

Special behavior for C++: To use this function with C++, you must use the _XOPEN_SOURCE_EXTENDED 1 feature test macro.

Returned value

sethostent() returns no values.

Related information

Parent topic: Library functions