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Full Discussion: please help with openbsd 2.9
Top Forums UNIX for Dummies Questions & Answers please help with openbsd 2.9 Post 3123 by Neo on Saturday 23rd of June 2001 10:03:54 AM
Old 06-23-2001
Code:
-rwxr-xr-x   1 root     root         7736 Mar 21  2000 libutil-2.1.3.so*
lrwxrwxrwx   1 root     root           16 Aug 19  1994 libutil.so.1 -> libutil-2.1.3.so*

The example above is from my /lib directory on one of my servers. Notice that the shared library file is libutil-2.1.3.so, which was the current version when I did my installation. It might be libutil-2.1.5 now (for all I know Smilie ) because shared lib (like all dynamic code) changes frequently to add features and to fix bugs in the code.<P>
However, all code that used the shared library must have a symbol or token to represent the library, this is normally something like libutil.so.X. Normally libutil.so.3 will work in code designed for libutil.so.2 (but not always!). <P>
So, when you install a new library, for example libutil-3.1.1 you must create a symbolic link (as required). In the example above, you might do an:

Code:
ln -sf libutil-3.1.1.so libutil.so.1

This might not be enough, because newer code might look for the token libutil.so.3 !! So, you also must do:

Code:
ln -sf libutil-3.1.1.so libutil.so.3

Which creates another symbolic link, as required. <P>
<A HREF=http://forums.unix.com/showthread.php?threadid=513&highlight=symbolic+link>'what is a symbolic link?' (the question) was discussed here</A>
<P>
Fixed typo (thanks MIB!)
 

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LEARN ABOUT NETBSD

libutil

UTIL(3) 						   BSD Library Functions Manual 						   UTIL(3)

NAME

     util, libutil -- system utilities library

LIBRARY

     System Utilities Library (libutil, -lutil)

DESCRIPTION

     The util library is the system utilities library and contains various system-dependent utility routines used in a wide variety of system dae-
     mons.  The abstracted functions are mostly related to pseudo-terminals and login accounting.  These routines are NetBSD-specific and are not
     portable.	Their use should be restricted.

     Declarations for these functions may be obtained from the include file <util.h>.  The util library and the associated functions are imple-
     mented within the /usr/src/lib/libutil directory.

LIST OF FUNCTIONS

     Name		     Description
     disklabel_dkcksum(3)    compute the checksum for a disklabel
     disklabel_scan(3)	     scan a buffer for a valid disklabel
     forkpty(3) 	     tty utility function
     getbootfile(3)	     get the name of the booted kernel file
     getlabeloffset(3)	     get the sector number and offset of the disklabel
     getlabelsector(3)	     get the sector number and offset of the disklabel
     getmaxpartitions(3)     get the maximum number of partitions allowed per disk
     getrawpartition(3)      get the system ``raw'' partition
     login(3)		     login utility function
     login_cap(3)	     query login.conf database about a user class
     login_close(3)	     query login.conf database about a user class
     login_getcapbool(3)     query login.conf database about a user class
     login_getcapnum(3)      query login.conf database about a user class
     login_getcapsize(3)     query login.conf database about a user class
     login_getcapstr(3)      query login.conf database about a user class
     login_getcaptime(3)     query login.conf database about a user class
     login_getclass(3)	     query login.conf database about a user class
     login_tty(3)	     tty utility function
     loginx(3)		     login utility function
     logout(3)		     login utility function
     logoutx(3) 	     login utility function
     logwtmp(3) 	     login utility function
     logwtmpx(3)	     login utility function
     opendisk(3)	     open a disk partition
     openpty(3) 	     tty utility function
     pidfile(3) 	     write a daemon pid file
     pidlock(3) 	     locks based on files containing PIDs
     pw_abort(3)	     passwd file update function
     pw_copy(3) 	     utility function for interactive passwd file updates
     pw_edit(3) 	     utility function for interactive passwd file updates
     pw_error(3)	     utility function for interactive passwd file updates
     pw_getconf(3)	     password encryption configuration access function
     pw_getprefix(3)	     passwd file update function
     pw_init(3) 	     utility function for interactive passwd file updates
     pw_lock(3) 	     passwd file update function
     pw_mkdb(3) 	     passwd file update function
     pw_prompt(3)	     utility function for interactive passwd file updates
     pw_scan(3) 	     utility function for interactive passwd file updates
     pw_setprefix(3)	     passwd file update function
     secure_path(3)	     determine if a file appears to be ``secure''
     setclasscontext(3)      query login.conf database about a user class
     setusercontext(3)	     query login.conf database about a user class
     snprintb(3)	     bitmask output conversion
     sockaddr_snprintf(3)    socket address formatting function
     strpct(3)		     decimal percent formatter
     ttyaction(3)	     ttyaction utility function
     ttylock(3) 	     locks based on files containing PIDs
     ttymsg(3)		     ttymsg utility function
     ttyunlock(3)	     locks based on files containing PIDs

FILES

     /usr/lib/libutil.a    static util library
     /usr/lib/libutil.so   dynamic util library
     /usr/lib/libutil_p.a  static util library compiled for profiling

SEE ALSO

     efun(3), intro(3)

BSD
								  August 29, 2011							       BSD
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