Move ftok() from libcompat to libc, so that it can be closer to its
friend shmget(). PR: closes misc/6763
This commit is contained in:
John Polstra
parent
40b0939a15
commit
63b7c21cc3
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=36859
@ -1,5 +1,5 @@
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# @(#)Makefile.inc 8.6 (Berkeley) 5/4/95
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# $Id: Makefile.inc,v 1.44 1998/02/28 03:57:02 steve Exp $
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# $Id: Makefile.inc,v 1.45 1998/03/09 06:48:25 jb Exp $
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# machine-independent gen sources
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.PATH: ${.CURDIR}/../libc/${MACHINE_ARCH}/gen ${.CURDIR}/../libc/gen
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@ -8,7 +8,7 @@ SRCS+= _rand48.c _spinlock_stub.c alarm.c arc4random.c assert.c \
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clock.c closedir.c confstr.c \
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crypt.c ctermid.c daemon.c devname.c disklabel.c \
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dlfcn.c drand48.c erand48.c err.c errlst.c \
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exec.c fnmatch.c fstab.c fts.c getbootfile.c getbsize.c \
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exec.c fnmatch.c fstab.c ftok.c fts.c getbootfile.c getbsize.c \
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getcap.c getcwd.c getdomainname.c getgrent.c getgrouplist.c \
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gethostname.c getloadavg.c getlogin.c getmntinfo.c getnetgrent.c \
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getosreldate.c getpagesize.c getpass.c getpwent.c getttyent.c \
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@ -38,7 +38,7 @@ CFLAGS+=-D_NLIST_DO_ELF
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MAN3+= alarm.3 arc4random.3 clock.3 \
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confstr.3 crypt.3 ctermid.3 daemon.3 \
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devname.3 directory.3 dladdr.3 dlopen.3 \
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err.3 exec.3 fnmatch.3 frexp.3 fts.3 \
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err.3 exec.3 fnmatch.3 frexp.3 ftok.3 fts.3 \
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getbootfile.3 getbsize.3 getcap.3 getcwd.3 \
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getdiskbyname.3 getdomainname.3 getfsent.3 \
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getgrent.3 getgrouplist.3 gethostname.3 getloadavg.3 \
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@ -8,8 +8,7 @@ NOPIC=
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.PATH: ${.CURDIR}/4.1/${MACHINE} ${.CURDIR}/4.1 \
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${.CURDIR}/4.3/${MACHINE} ${.CURDIR}/4.3 \
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${.CURDIR}/4.4/${MACHINE} ${.CURDIR}/4.4 \
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${.CURDIR}/regexp \
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${.CURDIR}/SysV
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${.CURDIR}/regexp
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# compat 4.1 sources
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# XXX MISSING: tell.c vlimit.c vtimes.c
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@ -65,10 +64,4 @@ MAN3+= regexp/regexp.3
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# MLINKS+=regexp.3 regcomp.3 regexp.3 regexec.3 regexp.3 regerror.3
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MLINKS+=regexp.3 regsub.3
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# SysV compat sources
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SRCS+= ftok.c
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MAN3+= SysV/ftok.3
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.include <bsd.lib.mk>
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@ -1,83 +0,0 @@
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.\" Copyright (c) 1994 SigmaSoft, Th. Lockert <tholo@sigmasoft.com>
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. The name of the author may not be used to endorse or promote products
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.\" derived from this software without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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.\" SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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.\" PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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.\" OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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.\" WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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.\" OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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.\" ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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.\"
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.\" $Id: ftok.3,v 1.8 1997/03/19 00:58:07 bde Exp $
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.Dd June 24, 1994
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.Os
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.Dt ftok 3
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.Sh NAME
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.Nm ftok
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.Nd create IPC identifier from path name
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.Sh SYNOPSIS
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.Fd #include <sys/types.h>
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.Fd #include <sys/ipc.h>
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.Ft key_t
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.Fn ftok "const char *path" "int id"
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.Sh DESCRIPTION
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.Bf -symbolic
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This function is available from the compatibility library, libcompat.
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.Ef
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The
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.Fn ftok
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function attempts to create a unique key suitable for use with the
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.Xr msgget 3 ,
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.Xr semget 2
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and
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.Xr shmget 2
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functions given the
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.Fa path
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of an existing file and a user-selectable
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.Fa id .
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.Pp
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The specified
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.Fa path
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must specify an existing file that is accessible to the calling process
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or the call will fail. Also, note that links to files will return the
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same key, given the same
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.Fa id .
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.Sh RETURN VALUES
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The
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.Fn ftok
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function will return -1 if
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.Fa path
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does not exist or if it cannot be accessed by the calling process.
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.Sh SEE ALSO
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.Xr semget 2 ,
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.Xr shmget 2 ,
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.Xr msgget 3
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.Sh HISTORY
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The
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.Fn ftok
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function originates with System V and is typically used by programs
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that use the System V IPC routines.
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.Sh AUTHORS
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.An Thorsten Lockert Aq tholo@sigmasoft.com
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.Sh BUGS
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The returned key is computed based on the device minor number and inode of the
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specified
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.Fa path
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in combination with the lower 8 bits of the given
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.Fa id .
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Thus it is quite possible for the routine to return duplicate keys.
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@ -1,47 +0,0 @@
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/*
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* Copyright (c) 1994 SigmaSoft, Th. Lockert <tholo@sigmasoft.com>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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static char *rcsid = "$Id$";
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#endif /* LIBC_SCCS and not lint */
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/ipc.h>
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key_t
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ftok(path, id)
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const char *path;
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char id;
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{
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struct stat st;
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if (stat(path, &st) < 0)
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return (key_t)-1;
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return (key_t) (id << 24 | (st.st_dev & 0xff) << 16 | (st.st_ino & 0xffff));
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}
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