Man Getprotobyname en anglais
GETPROTOENT(3)             Linux Programmer's Manual            GETPROTOENT(3)



 

NAME


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

 

SYNOPSIS


       #include 

       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 line from the file  /etc/pro-
       tocols  and  returns  a  structure  protoent  containing the broken out
       fields from the line.  The /etc/protocols file is opened if  necessary.

       The getprotobyname() function returns a protoent structure for the line
       from /etc/protocols that matches the protocol name name.

       The getprotobynumber() function returns a protoent  structure  for  the
       line that matches the protocol number number.

       The  setprotoent()  function opens and rewinds the /etc/protocols file.
       If stayopen is true (1), then the file will not be closed between calls
       to getprotobyname() or getprotobynumber().

       The endprotoent() function closes /etc/protocols.

       The protoent structure is defined in  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 zero terminated list of alternative names for the protocol.

       p_proto
              The protocol number.

 

RETURN VALUE


       The  getprotoent(),  getprotobyname()  and getprotobynumber() functions
       return the protoent structure, or a NULL pointer if an error occurs  or
       the end of the file is reached.

 

FILES


       /etc/protocols
              protocol database file

 

CONFORMING TO


       4.3BSD, POSIX.1-2001.

 

SEE ALSO


       getnetent(3), getservent(3), protocols(5)

 

COLOPHON


       This  page  is  part of release 3.05 of the Linux man-pages project.  A
       description of the project, and information about reporting  bugs,  can
       be found at http://www.kernel.org/doc/man-pages/.



GNU                               1993-04-24                    GETPROTOENT(3)