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setprotoent(3) Library Functions Manual setprotoent(3) NAME setprotoent, setprotoent_r - Open or rewind the protocols file LIBRARY Standard C Library (libc.so, libc.a) SYNOPSIS #include <netdb.h> void setprotoent( int stay_open); [Digital] The following function is supported in order to maintain backward compatibility with previous versions of the operating system. int setprotoent_r( int stay_open, struct protoent_data *proto_data); The following definition of the setprotoent() function does not conform to current standards and is supported only for backward compatibility (see standards(5)): int setprotoent( int stay_open); STANDARDS Interfaces documented on this reference page conform to industry stan- dards as follows: setprotoent(): XPG4-UNIX Refer to the standards(5) reference page for more information about in- dustry standards and associated tags. PARAMETERS Indicates when to close the protocols file. Specifying a value of 0 (zero) causes the file to be closed after each call to the setpro- toent() function. Specifying a nonzero value allows the protocols file to remain open after each function. [Digital] For setprotoent_r() only, this points at a structure where setprotoent_r() stores informa- tion about the protocols file. DESCRIPTION The setprotoent() (set protocol entry) function opens either the local /etc/protocols file or the NIS distributed protocols file and sets the file marker to the beginning of the file. To determine which file or files to search, and in which order, the system uses the switches in the /etc/svc.conf file. NOTES [Digital] The setprotoent_r() function is the reentrant version of the setprotoent() function. It is supported in order to maintain backward compatibility with previous versions of the operating system. Upon successful completion, the setprotoent_r() function returns a value of 0 (zero). Otherwise, it returns a value of -1. [Digital] Note that before calling the setprotoent_r() function for the first time, you must zero-fill the protoent_data structure. The netdb.h header file defines the protoent_data structure. RETURN VALUES [Digital] Upon successful completion, the version of setprotoent() provided for backward compatibility returns a value of 1. Otherwise, it returns a value of 0 (zero). ERRORS Current industry standards do not define error values for the setpro- toent() function. [Digital] If any of the following conditions occurs, the setpro- toent_r() function sets errno to the corresponding value: The proto_data parameter is invalid. In addition, the setprotoent(), backward compatible version of setpro- toent(), and setprotoent_r() functions can fail to open the file. In this case, errno will be set to the failure. FILES Contains the protocol names. The database service selection configura- tion file. RELATED INFORMATION Functions: endprotoent(3), getprotobyname(3), getprotobynumber(3), get- protoent(3). Files: protocols(4), svc.conf(4). Networks: nis_intro(7). Standards: standards(5). delim off setprotoent(3)