endhostent_r()--Close Host Database

 #include <netdb.h>

 void endhostent_r(struct hostent_data
                   *hostent_data_struct_addr)

The endhostent_r() function is used to close the host database file. The file is opened by those functions that retrieve information about a host (for example, gethostent_r()).

Parameters

struct hostent_data *hostent_data_struct_addr  (input) 

Specifies the pointer to the hostent_data structure, which is used to pass and preserve results between function calls. The field host_control_blk in the hostent_data structure must be initialized with hexadecimal zeros before its initial use. If compatibility with other platforms is required, then the entire hostent_data structure must be initialized to hexadecimal zeros before initial use.

Authorities

No authorization is required.

Return Value

The endhostent_r() function returns an integer. Possible values are:

• -1 (unsuccessful call)
• 0 (successful call)

The struct hostent_datadenoted by hostent_data_struct_addr is defined in <netdb.h>.

Error Conditions

When the endhostent_r() function fails, errno can be set to:

[EINVAL]

The hostent_data structure was not properly initialized to hexadecimal zeros before initial use. For corrective action, see the description for structure hostent_data.

Usage Notes

1. When the _XOPEN_SOURCE macro defined to the value 520 or greater, the host file is always closed. When the _XOPEN_SOURCE macro is not so defined, the host file will not be closed if a sethostent_r() call with a nonzero parameter value was previously done.
   
   
2. The iSeries Navigator or the following CL commands can be used to access the host database file:
   
   
   • ADDTCPHTE (Add TCP/IP Host Table Entry)
   • RMVTCPHTE (Remove TCP/IP Host Table Entry)
   • CHGTCPHTE (Change TCP/IP Host Table Entry)
   • RNMTCPHTE (Rename TCP/IP Host Table Entry)
   • MRGTCPHT (Merge TCP/IP Host Tables)
   
   
   
3. When you develop in C-based languages and an application is compiled with the _XOPEN_SOURCE macro defined to the value 520 or greater, the endhostent_r() API is mapped to qso_endhostent_r98().

Related Information

• _XOPEN_SOURCE--Using _XOPEN_SOURCE for the UNIX 98 compatible interface
  
  
• gethostbyaddr_r()--Get Host Information for IP Address
  
  
• gethostbyname_r()--Get Host Information for Host Name
  
  
• gethostent_r()--Get Next Entry from Host Database
  
  
• sethostent_r()--Open Host Database