endprotoent_r()--Close Protocol Database
Syntax
#include <netdb.h> int endprotoent_r(struct protoent_data *protoent_data_struct_addr)
Service Program Name: QSOSRV2
Default Public Authority: *USE
Threadsafe: Yes
The endprotoent_r() function is used to close the protocol database file. The file is opened by those functions that retrieve information about a protocol (for example, getprotoent_r()).
Parameters
- struct protoent_data *protoent_data_struct_addr (input)
- Specifies the pointer to the protoent_data structure, which is used to pass and preserve results between function calls. The field proto_control_blk must be initialized with hexadecimal zeros before its initial use. If compatibility with other platforms is required, then the entire protoent_data structure must be initialized with hexadecimal zeros before initial use.
Authorities
No authorization is required.
Return Value
The endprotoent_r() function returns an integer. Possible values are:
- -1 (unsuccessful call)
- 0 (successful call)
The struct protoent_data denoted by protoent_data_struct_addr is defined in <netdb.h>.
Error Conditions
When the endprotoent_r() function fails, errno can be set to:
- [EINVAL]
The protoent_data structure was not properly initialized with hexadecimal zeros before initial use. For corrective action, see the description for structure protoent_data.
Usage Notes
- When the _XOPEN_SOURCE macro defined to the value 520 or greater, the protocols
file is always closed. When the _XOPEN_SOURCE macro is not so defined, the protocols
file will not be closed if a setprotoent_r() call with a non-zero parameter
value was previously done.
- System i® Navigator or the following CL commands can be
used to access the protocol database file:
- WRKPCLTBLE (Work with Protocol Table Entries)
- ADDPCLTBLE (Add Protocol Table Entry)
- RMVPCLTBLE (Remove Protocol Table Entry)
- 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 endprotoent_r() API is mapped to qso_endprotoent_r98().
Related Information
- _XOPEN_SOURCE--Using _XOPEN_SOURCE for the UNIX® 98
compatible interface
- getprotobynumber_r()--Get Protocol
- getprotobyname_r()--Get Protocol Information for
Protocol Name
- getprotoent_r()--Get Next Entry from Protocol
Database
- setprotoent_r()--Open Protocol Database
API introduced: V4R2