개요

• 솔라나라에 설명된 어플리케이션에 대해 맨 페이지를 찾아 출력한다.
• MAN 페이지에 대한 설명은 윈디하나의 솔라나라: MAN 페이지을 참고하자.
• svcadm(8)을 검색하려면 섹션에서 8 을 선택하고, 맨 페이지 이름에 svcadm을 입력하고 검색을 누른다.

getprotobynumber(3)

GETPROTOENT(3)             Linux Programmer's Manual            GETPROTOENT(3)

NAME
       getprotoent, getprotobyname, getprotobynumber, setprotoent, endprotoent
       - get protocol entry

SYNOPSIS
       #include <netdb.h>

       struct protoent *getprotoent(void);

       struct protoent *getprotobyname(const char *name);

       struct protoent *getprotobynumber(int proto);

       void setprotoent(int stayopen);

       void endprotoent(void);

DESCRIPTION
       The  getprotoent()  function  reads  the  next entry from the protocols
       database (see protocols(5)) and returns a protoent structure containing
       the broken-out fields from the entry.  A connection is  opened  to  the
       database if necessary.

       The  getprotobyname() function returns a protoent structure for the en‐
       try from the database that matches the protocol name name.   A  connec‐
       tion is opened to the database if necessary.

       The  getprotobynumber()  function  returns a protoent structure for the
       entry from the database that matches the  protocol  number  number.   A
       connection is opened to the database if necessary.

       The setprotoent() function opens a connection to the database, and sets
       the  next  entry  to the first entry.  If stayopen is nonzero, then the
       connection to the database will not be closed between calls to  one  of
       the getproto*() functions.

       The endprotoent() function closes the connection to the database.

       The protoent structure is defined in <netdb.h> as follows:

           struct protoent {
               char  *p_name;       /* official protocol name */
               char **p_aliases;    /* alias list */
               int    p_proto;      /* protocol number */
           }

       The members of the protoent structure are:

       p_name The official name of the protocol.

       p_aliases
              A NULL-terminated list of alternative names for the protocol.

       p_proto
              The protocol number.

RETURN VALUE
       The  getprotoent(),  getprotobyname()  and getprotobynumber() functions
       return a pointer to a statically allocated  protoent  structure,  or  a
       null pointer if an error occurs or the end of the file is reached.

FILES
       /etc/protocols
              protocol database file

ATTRIBUTES
       For  an  explanation  of  the  terms  used in this section, see attrib‐
       utes(7).  allbox; lbw18 lb lbw28 l l l.   Interface Attribute Value  T{
       getprotoent() T}   Thread safety  T{ MT-Unsafe race:protoent
       race:protoentbuf  locale  T} T{ getprotobyname() T}   Thread safety  T{
       MT-Unsafe race:protobyname
       locale  T}  T{  getprotobynumber()  T}   Thread  safety  T{   MT-Unsafe
       race:protobynumber
       locale T} T{ setprotoent(),
       endprotoent() T}   Thread safety  T{ MT-Unsafe race:protoent
       locale T}

       In  the above table, protoent in race:protoent signifies that if any of
       the functions setprotoent(), getprotoent(), or endprotoent()  are  used
       in  parallel  in  different threads of a program, then data races could
       occur.

CONFORMING TO
       POSIX.1-2001, POSIX.1-2008, 4.3BSD.

SEE ALSO
       getnetent(3), getprotoent_r(3), getservent(3), protocols(5)

COLOPHON
       This page is part of release 5.02 of the Linux  man-pages  project.   A
       description  of  the project, information about reporting bugs, and the
       latest    version    of    this    page,    can     be     found     at
       https://www.kernel.org/doc/man-pages/.

GNU                               2017-09-15                    GETPROTOENT(3)