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.\" Copyright 1993 David Metcalfe (david@prism.demon.co.uk)
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.\"
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.\" Permission is granted to make and distribute verbatim copies of this
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.\" manual provided the copyright notice and this permission notice are
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.\" preserved on all copies.
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.\"
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.\" Permission is granted to copy and distribute modified versions of this
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.\" manual under the conditions for verbatim copying, provided that the
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.\" entire resulting derived work is distributed under the terms of a
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.\" permission notice identical to this one.
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2007-04-12 22:42:49 +00:00
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.\"
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2004-11-03 13:51:07 +00:00
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.\" Since the Linux kernel and libraries are constantly changing, this
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.\" manual page may be incorrect or out-of-date. The author(s) assume no
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.\" responsibility for errors or omissions, or for damages resulting from
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.\" the use of the information contained herein. The author(s) may not
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.\" have taken the same level of care in the production of this manual,
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.\" which is licensed free of charge, as they might when working
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.\" professionally.
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2007-04-12 22:42:49 +00:00
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.\"
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2004-11-03 13:51:07 +00:00
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.\" Formatted or processed versions of this manual, if unaccompanied by
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.\" the source, must acknowledge the copyright and authors of this work.
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.\"
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.\" References consulted:
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.\" Linux libc source code
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.\" Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991)
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.\" 386BSD man pages
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.\" Modified Sat Jul 24 19:26:03 1993 by Rik Faith (faith@cs.unc.edu)
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2008-08-18 13:40:35 +00:00
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.TH GETPROTOENT 3 2008-08-19 "GNU" "Linux Programmer's Manual"
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2004-11-03 13:51:07 +00:00
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.SH NAME
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getprotoent, getprotobyname, getprotobynumber, setprotoent,
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endprotoent \- get protocol entry
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.SH SYNOPSIS
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.nf
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.B #include <netdb.h>
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.sp
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.B struct protoent *getprotoent(void);
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.sp
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.BI "struct protoent *getprotobyname(const char *" name );
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.sp
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.BI "struct protoent *getprotobynumber(int " proto );
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.sp
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.BI "void setprotoent(int " stayopen );
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.sp
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.B void endprotoent(void);
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.fi
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.SH DESCRIPTION
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2007-05-12 09:06:04 +00:00
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The
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.BR getprotoent ()
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function reads the next entry from the protocols database (see
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.BR protocols (5))
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and returns a \fIprotoent\fP structure
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containing the broken-out fields from the entry.
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A connection is opened to the database if necessary.
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.PP
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The
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.BR getprotobyname ()
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function returns a \fIprotoent\fP structure
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for the entry from the database
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that matches the protocol name \fIname\fP.
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A connection is opened to the database if necessary.
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.PP
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The
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.BR getprotobynumber ()
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function returns a \fIprotoent\fP structure
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for the entry from the database
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that matches the protocol number \fInumber\fP.
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A connection is opened to the database if necessary.
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.PP
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The
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.BR setprotoent ()
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function opens a connection to the database,
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and sets the next entry to the first entry.
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intro.1, time.1, adjtimex.2, capget.2, eventfd.2, fcntl.2, getrlimit.2, getsockopt.2, gettimeofday.2, intro.2, ioctl_list.2, ioperm.2, mlock.2, pivot_root.2, poll.2, prctl.2, ptrace.2, sched_setscheduler.2, select_tut.2, semget.2, sigaltstack.2, signalfd.2, sysctl.2, timer_settime.2, timerfd_create.2, wait.2, CPU_SET.3, argz_add.3, assert_perror.3, atexit.3, backtrace.3, bcmp.3, clearenv.3, ctime.3, dl_iterate_phdr.3, dlopen.3, ecvt.3, errno.3, error.3, ether_aton.3, exit.3, fenv.3, ferror.3, finite.3, flockfile.3, fnmatch.3, fpathconf.3, fpclassify.3, ftime.3, ftok.3, ftw.3, fwide.3, getaddrinfo.3, gethostbyname.3, getlogin.3, getnameinfo.3, getnetent.3, getopt.3, getprotoent.3, getrpcent.3, getservent.3, glob.3, hsearch.3, inet.3, isalpha.3, iswalnum.3, iswalpha.3, iswblank.3, iswcntrl.3, iswctype.3, iswdigit.3, iswgraph.3, iswlower.3, iswprint.3, iswpunct.3, iswspace.3, iswupper.3, iswxdigit.3, longjmp.3, lsearch.3, malloc.3, matherr.3, mblen.3, mbsinit.3, mbtowc.3, on_exit.3, printf.3, pthread_attr_init.3, pthread_attr_setaffinity_np.3, pthread_attr_setdetachstate.3, pthread_attr_setguardsize.3, pthread_attr_setinheritsched.3, pthread_attr_setschedparam.3, pthread_attr_setschedpolicy.3, pthread_attr_setscope.3, pthread_attr_setstack.3, pthread_attr_setstackaddr.3, pthread_attr_setstacksize.3, pthread_cancel.3, pthread_cleanup_push.3, pthread_equal.3, pthread_getattr_np.3, pthread_getcpuclockid.3, pthread_setaffinity_np.3, pthread_setcancelstate.3, pthread_setconcurrency.3, pthread_setschedparam.3, pthread_setschedprio.3, ptsname.3, putenv.3, putgrent.3, raise.3, rcmd.3, regex.3, rexec.3, rpc.3, rpmatch.3, rtnetlink.3, scandir.3, sem_init.3, setaliasent.3, setbuf.3, setenv.3, setjmp.3, signbit.3, stdio_ext.3, strtod.3, strtol.3, strtoul.3, system.3, termios.3, timeradd.3, tzset.3, ualarm.3, wctomb.3, xdr.3, st.4, tty_ioctl.4, core.5, elf.5, proc.5, bootparam.7, capabilities.7, icmp.7, ip.7, ipv6.7, math_error.7, mdoc.samples.7, mq_overview.7, pthreads.7, raw.7, regex.7, socket.7, tcp.7, tzselect.8: Global fix: s/non-zero/nonzero/
The tendency in English, as prescribed in style guides like
Chicago MoS, is towards removing hyphens after prefixes
like "non-" etc.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2010-01-16 16:40:55 +00:00
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If \fIstayopen\fP is nonzero,
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then the connection to the database
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will not be closed between calls to one of the
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.BR getproto* ()
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functions.
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2004-11-03 13:51:07 +00:00
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.PP
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The
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.BR endprotoent ()
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function closes the connection to the database.
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2004-11-03 13:51:07 +00:00
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.PP
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The \fIprotoent\fP structure is defined in \fI<netdb.h>\fP as follows:
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.sp
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.in +4n
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.nf
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struct protoent {
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char *p_name; /* official protocol name */
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char **p_aliases; /* alias list */
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int p_proto; /* protocol number */
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}
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.fi
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.in
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.PP
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The members of the \fIprotoent\fP structure are:
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.TP
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.I p_name
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The official name of the protocol.
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.TP
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.I p_aliases
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A NULL-terminated list of alternative names for the protocol.
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.TP
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.I p_proto
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The protocol number.
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.SH "RETURN VALUE"
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2007-05-12 09:06:04 +00:00
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The
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.BR getprotoent (),
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.BR getprotobyname ()
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and
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.BR getprotobynumber ()
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2008-08-18 13:37:40 +00:00
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functions return a pointer to a
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statically allocated \fIprotoent\fP structure, or a NULL pointer if an
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error occurs or the end of the file is reached.
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.SH FILES
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.PD 0
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.TP
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.I /etc/protocols
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protocol database file
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.PD
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.SH "CONFORMING TO"
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2006-08-03 13:57:30 +00:00
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4.3BSD, POSIX.1-2001.
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.SH "SEE ALSO"
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.BR getnetent (3),
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.BR getprotoent_r (3),
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.BR getservent (3),
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.BR protocols (5)
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