getnetent_r(3) [osf1 man page]
getnetent(3) Library Functions Manual getnetent(3) NAME
getnetent, getnetent_r - Get a network entry LIBRARY
Standard C Library (libc.so, libc.a) SYNOPSIS
#include <netdb.h> struct netent *getnetent(void); [Tru64 UNIX] The following obsolete function is supported in order to maintain backward compatibility with previous versions of the oper- ating system. You should not use it in new designs. int getnetent_r( struct netent *net, struct netent_data *net_data); STANDARDS
Interfaces documented on this reference page conform to industry standards as follows: getnetent(): XNS4.0 Refer to the standards(5) reference page for more information about industry standards and associated tags. PARAMETERS
[Tru64 UNIX] Points to the netent structure. The netdb.h header file defines the netent structure. [Tru64 UNIX] Is data for the net- works database. The netdb.h header file defines the netent_data structure. DESCRIPTION
The getnetent() function retrieves network information by opening and sequentially reading either the local /etc/networks file or the NIS distributed networks file for the requested information. To determine which file or files to search, and in which order, the system uses the switches in the /etc/svc.conf file. The getnetent() function returns a pointer to a netent structure, which contains the equivalent fields for a network description line in the networks file. The netent structure is defined in the netdb.h header file. Use the endnetent() function to close the /etc/networks file. The getnetent() return value points to static data, which is overwritten by any subsequently called functions using the same structure. NOTES
The getnetent() function returns a pointer to thread-specific data. Subsequent calls to this function from the same thread overwrite this data. [Tru64 UNIX] The getnetent_r() function is an obsolete reentrant version of the getnetent() function. It is supported in order to main- tain backward compatibility with previous versions of the operating system and should not be used in new designs. Note that you must set the net_fp field of the netent_data structure to NULL before its first access by either the setnetent_r() or getnetent_r() function. RETURN VALUES
Upon successful completion, the getnetent() function returns a pointer to a netent structure. If it fails or reaches the end of the /etc/networks name file, it returns a null pointer. [Tru64 UNIX] Upon successful completion, the getnetent_r() function stores the netent structure in the location pointed to by net, and returns a value of 0 (zero). Upon failure, it returns a value of -1. ERRORS
Current industry standards do not define error values for the getnetent() function. [Tru64 UNIX] If any of the following conditions occurs, the getnetent_r() function sets errno to the corresponding value: The netent or net_data parameter is invalid. The search failed (EOF). FILES
This file is the DARPA Internet network name database file. Each record in the file occupies a single line and has three fields: the offi- cial network name, the network number, and alias. The database service selection configuration file. RELATED INFORMATION
Functions: getnetbyaddr(3), getnetbyname(3), setnetent(3), endnetent(3). Files: networks, svc.conf(4). Networks: nis_intro(7). Standards: standards(5). delim off getnetent(3)
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getnetent(3) Library Functions Manual getnetent(3) NAME
getnetent, getnetent_r - Get a network entry LIBRARY
Standard C Library (libc.so, libc.a) SYNOPSIS
#include <netdb.h> struct netent *getnetent(void); [Tru64 UNIX] The following obsolete function is supported in order to maintain backward compatibility with previous versions of the oper- ating system. You should not use it in new designs. int getnetent_r( struct netent *net, struct netent_data *net_data); STANDARDS
Interfaces documented on this reference page conform to industry standards as follows: getnetent(): XNS4.0 Refer to the standards(5) reference page for more information about industry standards and associated tags. PARAMETERS
[Tru64 UNIX] Points to the netent structure. The netdb.h header file defines the netent structure. [Tru64 UNIX] Is data for the net- works database. The netdb.h header file defines the netent_data structure. DESCRIPTION
The getnetent() function retrieves network information by opening and sequentially reading either the local /etc/networks file or the NIS distributed networks file for the requested information. To determine which file or files to search, and in which order, the system uses the switches in the /etc/svc.conf file. The getnetent() function returns a pointer to a netent structure, which contains the equivalent fields for a network description line in the networks file. The netent structure is defined in the netdb.h header file. Use the endnetent() function to close the /etc/networks file. The getnetent() return value points to static data, which is overwritten by any subsequently called functions using the same structure. NOTES
The getnetent() function returns a pointer to thread-specific data. Subsequent calls to this function from the same thread overwrite this data. [Tru64 UNIX] The getnetent_r() function is an obsolete reentrant version of the getnetent() function. It is supported in order to main- tain backward compatibility with previous versions of the operating system and should not be used in new designs. Note that you must set the net_fp field of the netent_data structure to NULL before its first access by either the setnetent_r() or getnetent_r() function. RETURN VALUES
Upon successful completion, the getnetent() function returns a pointer to a netent structure. If it fails or reaches the end of the /etc/networks name file, it returns a null pointer. [Tru64 UNIX] Upon successful completion, the getnetent_r() function stores the netent structure in the location pointed to by net, and returns a value of 0 (zero). Upon failure, it returns a value of -1. ERRORS
Current industry standards do not define error values for the getnetent() function. [Tru64 UNIX] If any of the following conditions occurs, the getnetent_r() function sets errno to the corresponding value: The netent or net_data parameter is invalid. The search failed (EOF). FILES
This file is the DARPA Internet network name database file. Each record in the file occupies a single line and has three fields: the offi- cial network name, the network number, and alias. The database service selection configuration file. RELATED INFORMATION
Functions: getnetbyaddr(3), getnetbyname(3), setnetent(3), endnetent(3). Files: networks, svc.conf(4). Networks: nis_intro(7). Standards: standards(5). delim off getnetent(3)