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-
- LC
-
- "@(#)README 1.3 9/7/90 Kent Landfield"
-
- This directory contains the source to lc. lc is much like the ls
- command except it separates the types of files into groups and then
- displays located file names to the user is a columnar fashion.
-
- lc was initially implemented by myself after I became accustomed
- to the lc command on a Mark Williams Coherent system I was running back
- in 1984. When I started moving to different systems I found that I did
- not like the lack of information, flexibility and the general display
- that ls provided. I have found that I am not the only one that has
- become feed up with ls and its jumbled output. All the people here use
- lc much more than they use ls. It is a locally well known fact that when
- a new machine comes into the house, the first local software that is put
- on the machine is lc. It is far from perfect but it is better than ls on
- a general use basis.
-
- lc uses three different environment variables COLS, CDPATH, and LC
- allowing you to customize how you wish lc to perform on a default
- basis. COLS is used to switch the column width between 80 and 132
- column display. LC is used to set lc specific options. The command
- line options shown in the option list below are available to be used
- in setting up how lc is to work for you. Options that you supply on
- the command line override options that are specified in the environment.
- lc uses CDPATH to locate files that are requested but are not in the
- specified location or within the local directory.
-
- lc has incorporated minimal spell checking using slightly modified
- routines found in the book, The UNIX Programming Environment, by
- Brian Kernighan and Rob Pike.
-
- The following is a quick reference of options to lc. These options
- can be specified in the Environment variable LC so that they are
- done each time lc is executed.
-
- lc -- categorize files in a directory and list column-wise
-
- Usage: lc [ options ] [ directory ... ]
-
- Options:
- -a List dot files as well.
- -b List block special files only
- -c List character special files only
- -d List directories only
- -D Do not display singular files
- -e Mark executable files with '*'
- -f List regular files only
- -F List fifo files only
- -1 List files one per line instead of in columns
- -r Do not sort the file names before displaying.
- -m List shared memory name space entry files only
- -M List semaphore name space entry files only
- -S List socket file only
- -s List symbolic links only
- -L Display symbolic links
- -l Mark symbolic links with '@'
- -I Suppress unresolved symbolic link messages.
-
- The "only" options can not be combined.
-
- If there is no 'directory' specified, the current directory is used.
-
- Not all options are supported on every system. (e.g. no symbolic links
- on your system ? Options -s, -L or -l won't be available..)
- If your system does not support shared memory name space entry files,
- then you cannot use the -m option...
-
- History:
- Initially designed on an IBM-XT running Coherent in 1984.
- Ported to XENIX on an IBM-AT in 1984.
- Ported to System V on AT&T 3Bs in 1985.
- Ported to DEC Vax 11/750 running System V in 1986.
- Ported to BSD4.2 on a Sequent Balance 8000 in 1986.
- Jeff Minnig added the initial support for links.
- Ported to SunOS 4.0 on a Sun 3/60 in 1988.
- Rick Ohnemus did major surgery to remove static storage
- and *greatly* enhanced the link support. Thanks rick!
- Tested with Ultrix 3.0 & 3.1 on a DECstation 3100 in 1989.
- Tested with Ultrix 3.0 & 3.1 on a VAXstation 3500 in 1989.
- Ported to AIX 2.2 on an IBM RT.
- Tested with UTek on a Tektronix 4319 in 1989.
- Tested with IRIX System V on a Silicon Graphics Iris 4D/210GTX in 1989.
- Tested with AmigaDOS 1.3 on an Amiga 1000 in 1989.
- Tested with SunOS 4.0.3 on a Sparkstation 1 in 1989.
- Tested with UTek on a Tektronix XD8810 in 1989.
- Tested with AIX 3.+ on a Risc System/6000 in 1990.
-
- The following is a todo list that may get done someday...
-
- 1. Port to all flavors of unix on all platforms. Lofty goal but
- on-going... :-)
- 2. Need to modify lc so that one environment (or compile) option will
- only let you see files you own or have access to.
- 3. Add spell checking code to CDPATH usage
- 4. Allow combination of only options...
-
- *PLEASE!*
- If you have a problem, there's someone else out there who either has
- had or will have the same problem. Please send all "lc" ideas, patches,
- etc to
-
- INTERNET: kent@sparky.IMD.Sterling.COM or UUCP: uunet!ssbell!sparky!kent
-
- so that I can continue to improve the functionality and portability of lc.
-
- -Kent+
-
-
-