Open System Services Library Calls Reference Manual (G06.29+, H06.08+, J06.03+)

OSS Library Calls (g - h) getservent_r(3)
NAME
getservent_r - Gets the next entry from the network services database (reentrant)
LIBRARY
G-series native OSS processes: /G/system/sysnn/zsptsrl
32-bit H-series and J-series OSS processes that do not use the Standard POSIX Thread library: |
/G/system/zdllnnn/zinetdll |
64-bit H-series and J-series OSS processes that do not use the Standard POSIX Thread library: |
/G/system/zdllnnn/yinetdll |
H-series and J-series OSS processes that use the Standard POSIX Thread library:
/G/system/zdllnnn/zsptdll
(See NOTES)
SYNOPSIS
[#include <sys/socket.h>]
#include <netdb.h>
[#include <spthread.h>] /* Required if using Standard POSIX Threads Library */
struct servent *getservent_r (
struct servent *ret,
char *buffer,
int buflen);
PARAMETERS
ret Points to a servent structure allocated by the caller.
buffer Points to the buffer supplied by the caller and used as a storage space for
returned data.
buflen Specifies the size of the buffer passed in bytes. For H06.21 and later H-series
RVUs and J06.10 and later J-series RVUs, HP recommends that this buffer be at
least equal to the size of the servent_data structure.
DESCRIPTION
The getservent_r( ) function is the reentrant version of the getservent( ) function and performs
the same function. However, the getservent_r( ) function uses buffers supplied by the caller to
store returned results, and is safe for use in both single-threaded and multi-threaded applications.
The ret parameter must be a pointer to a struct servent structure allocated by the caller. On suc-
cessful completion, the function returns the protocol entry in this structure. The buffer parameter
must be a pointer to a buffer supplied by the caller. This buffer is used as storage space for the
host data. All of the pointers within the returned struct servent ret point to data stored within
this buffer. The buffer must be large enough to hold all of the data associated with the host entry.
For H06.21 and later H-series RVUs and J06.10 and later J-series RVUs, HP recommends that
the size of the buffer, indicated by the buflen parameter, be equal or greater than the size of the
servent_data structure.
If multiple threads interleave calls to getservbyname_r( ), getservbyport_r( ), getservent_r( )
and their base versions, the threads enumerate disjoint subsets of the services database.
NOTES
On systems running H-series RVUs earlier than H06.21, J-series RVUs earlier than J06.10, or
G-series RVUs (native OSS processes only), follow the instructions for using the Standard
POSIX Threads library.
On systems running H06.21 or later H-series RVUs or J06.10 or later J-series RVUs, you can use
either the POSIX User Thread Model library or the Standard POSIX Threads library for threaded
applications.
527187-017 Hewlett-Packard Company 3−145