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One question about this never ending thread. What did they talk about?Quote:
Originally posted by Noble Hamlet
Recently on a visit to another well-known site I witnessed the 1000 post thread in which they wanted to create a never-ending thread!
Basically I believe AntiOnline can do better than their petty 7 pages!
So here it is The Worlds Longest Thread!
;)
LOLQuote:
Originally posted by Ennis
Nice pic ;)
ps: Everyone here is naked but you. j/k
Otherwise would give some boost to AO. j/k
:)
My friend Moopsy posted a link to a site which has a really high amount of posts.. and with these things, eventually people run out of things to talk about and just start spouting mindless babble... and believe me, that site has a lot of it....Quote:
Originally posted by casper3699
One question about this never ending thread. What did they talk about?
I sense this thread going down that path very shortly, and being the demented person that I am, I want to hasten it on its journey.... So, for your enjoyment, I give you a silly poem...
Here is this thread, and here is a fish..
my oh my, what a pretty french miss...
Look out for that tree and look out for that frog.
No wait, my mistake, thats a dog...
Come on we need at least 1000 posts.
ROFL Matty, love the poem...
Just an update on how my day is going (since this IS the world's longest thread in the making)...why is it, being a unix admin, I'm having to literally hack into a server to get root for a machine that we're responsible for?
My boss: "Damnit, I want to know why we don't have root for that box...the french don't have responsibility for it and it's on our property!" (I work at a company that's owned and headquartered in France)
Me: "Well, per the reboot yesterday, I didn't think about going to single-user mode at the console and nobody's got the root password. Someone has it because they cleaned up / which was 100% yesterday when I checked, along with the semaphores which were trashed."
My boss: "Hmmm, so someone *does* have it, yet they emailed the wrong password yesterday to half the world and still didn't get it to you so you could fix it?"
Me: "Right, someone's got it...so says the successful attempt to su to root about six times today so far."
My boss: "Damnit, I want you to get root on that box!"
Me: "Well, I *could* get root, but it's not very orthodox and you *are* the head of internal security as well..."
My boss: "Well, I didn't hear anything...I just want us to have root for that box, sudo installed, and nobody else has root access outside of sudo, which will be configured for them on a business-need basis."
Me: "Ok, you're the boss...I'll make sure I clean up after myself..."
*ten minutes later*
Me: "Ok, we've got root, it's changed, sudo's installed, and all tracks are clean. You're gonna get phonecalls now, that's for sure."
My boss: "Right on...screw 'em if they can't take a joke..."
I love my job!
I am currently trawling through the tutorials forum for a tutorial to put in the Newsletter.
So much info!
;)
Mindless Babble: I pledge allegiance to the Underground
lalala :p
Hey,
Nice story Vorlin ;)
Ennis: your PM inbox is full again...
Urgghh I just cleared it out.
Too many Pm's.
We could suggest to JP to increase the ammount of space for the PM's?
Ennis make sure you choose 'from the beginning" in your private message control page for every folder you clean cause otherwise old msg's are still there. But you probably already noticed that?
I'am waiting to send you some more PM's. j/k.
:)
An Irishman walks into a bar in Dublin, orders three pints of
Guinness and sits in the back of the room, drinking a sip out of
each one in turn.
When he finishes them, he comes back to the bar and orders three more.
The bartender approaches and tells him, "You know, a pint goes flat after I draw it; it would taste better if you bought one at a time."
The Irishman replies, "Well, you see, I have two brothers. One is in America, the other in Australia, and I'm here in Dublin. When we all left home, we promised that we'd drink this way to remember the days when we drank together. So I drinks one for each o' me brothers and one for me self."
The bartender admits that this is a nice custom, and leaves it there.
The Irishman becomes a regular in the bar, and always drinks the same way: He orders three pints and drinks them in turn.
One day, he comes in and orders two pints. All the other regulars take notice and fall silent. When he comes back to the bar for the second round, the bartender says, "I don't want to intrude on your grief, but I wanted to offer my condolences on your great loss."
The Irishman looks quite puzzled for a moment, then a light dawns in his eye and he laughs. "Oh, no, everybody's just fine," he explains, "It's just that me wife had us join that Mormon Church and I had to quit drinking.
Oh man, they're showing re-runs of ALF over here! What a way to start the weekend! :wow:
Quote:
Originally posted by Guus
Oh man, they're showing re-runs of ALF over here! What a way to start the weekend! :wow:
I used to always watch that show. But then it disapeared for a long time.
ROFLMAO
KorpDeath Thats a good one!!!!:jack: rofl
Thanks
I've got a million of them. Actually it's more like 1 GB worth, but who's counting.
Hey dont start posting Irishman jokes!
Oi Im Irish!
;)
Don't just open yourself up like that Big E. You're making it too easy. LOL
Was that Irish man joke offensive? I hope not. It's so inane.
**You might be a geek...**
If the only jokes you receive are through e-mail.
If your wrist watch has more computing power than a 486DX-50.
If your idea of good interpersonal communication means getting the decimal
point in the right place.
If you have used coat hangers and duct tape for something other than
hanging coats and taping ducts.
If, at Christmas, it goes without saying that you will be the one to find
the burnt-out bulb in the string.
If your ideal evening consists of fast-forwarding through the latest sci-fi
movie looking for technical inaccuracies.
If you have "Dilbert" comics displayed anywhere in your work area.
If you carry on a one-hour debate over the expected results of a test that
actually takes five minutes to run.
If a team of you and your co-workers have set out to modify the antenna on
the radio in your work area for better reception.
If you ever burned down the gymnasium with your Science Fair project.
If you have never backed-up your hard drive.
If the salespeople at Circuit City can't answer any of your questions.
If you still own a slide rule and you know how to work it.
If you rotate your screen savers more frequently than your automobile
tires.
If your I.Q. number is bigger than your weight.
If the microphone or visual aids at a meeting don't work and you rush up to
the front to fix it.
If you can remember 7 computer passwords but not your anniversary.
If you have ever owned a calculator with no equal key and know what RPN
stands for.
If you can type 70 words a minute but can't read your own handwriting.
If you have more friends on the Internet than in real life.
If you think that when people around you yawn, it's because they didn't get
enough sleep.
If your three year old son asks why the sky is blue and you try to explain
atmospheric absorption theory.
Falalalala!!! have a happy new year and a merry christmas to all and to all a good night!
:D :) :p Falalalala!!! have a happy new year and a merry christmas to all and to all a good night! :D :) :p
A funny song for yoos guys/gals.....
We have all been to those meetings where someone wants over
100%. Here's to achieving 103%. Here's a little math that
might prove helpful in the future! What makes life 100% ??
IF,
A=1
B=2
C=3
etc.
etc.
Then,
H A R D W O R K
8 1 18 4 23 15 18 11 = Only 98 %
K N O W L E D G E
11 14 15 23 12 5 4 7 5 = Only 96 %
But,
A T T I T U D E
1 20 20 9 20 21 4 5 = 100 %
However,
B U L L S H I T
2 21 12 12 19 8 9 20 = 103%
Number 500
Half-way there
5 0 0
501 replys? ok so how far are you planning on going here:D :eek:
Well if the_JiNx said half way there how much farther do YOU think we have to go????
Just asking.
1/2=500
1=???
Trying to make it easy for you.
1. Cannot find REALITY.SYS. Universe halted.
2. COFFEE.EXE Missing - Insert Cup and Press Any Key
3. Buy a Pentium 586/90 so you can reboot faster.
4. 2 + 2 = 5 for extremely large values of 2.
5. Computers make very fast, very accurate mistakes.
6. Computers are not intelligent. They only think they are.
7. My software never has bugs. It just develops random features.
8. C:\WINDOWS C:\WINDOWS\GO C:\PC\CRAWL
9. C:\DOS C:\DOS\RUN RUN\DOS\RUN
10. <-------- The information went data way --------
11. Best file compression around: "DEL ." = 100% compression
12. The Defn. of an Upgrade: Take old bugs out, put new ones in.
13. BREAKFAST.COM Halted...Cereal Port Not Responding
14. The name is Baud......, James Baud.
15. BUFFERS=20 FILES=15 2nd down, 4th quarter, 5 yards to go!
16. Access denied--nah nah na nah nah na!
17. C:\> Bad command or file name! Go stand in the corner.
18. Bad command. Bad, bad command! Sit! Stay! Staaay...
19. Why doesn't DOS ever say "EXCELLENT command or filename!"
20. As a computer, I find your faith in technology amusing.
21. Southern DOS: Y'all reckon? (Yep/Nope)
22. Backups? We don' NEED no steenking backups.
23. E Pluribus Modem
24. >... File not found. Should I fake it? (Y/N)
25. Ethernet (n): something used to catch the etherbunny
26. A mainframe: The biggest PC peripheral available.
27. An error? Impossible! My modem is error correcting.
28. CONGRESS.SYS Corrupted: Re-boot Washington D.C (Y/N)?
29. Does fuzzy logic tickle?
30. A computer's attention span is as long as it's power cord.
31. 11th commandment - Covet not thy neighbor's Pentium.
32. 24 hours in a day...24 Mountain Dews in a case...coincidense?
33. Disinformation is not as good as datinformation.
34. Windows: Just another pane.
35. SENILE.COM found . . . Out Of Memory . . .
36. Who is General Failure & why's he reading my disk?
37. Ultimate office automation: networked coffee.
38. RAM disk is not an installation procedure.
39. Shell to DOS...Come in DOS, do you copy? Shell to DOS...
40. All computers wait at the same speed.
41. DEFN: Computer - A device designed to speed and automate errors.
42. Press -- to continue ...
43. Smash forehead on keyboard to continue ...
44. Enter any 11-digit prime number to continue ...
45. ASCII stupid question, get a stupid ANSI!
46. E-mail returned to sender -- insufficient voltage.
47. Help! I'm modeming... and I can't hang up!!!
48. All wiyht. Rhosritched mg kebord awound?
49. Error: Keyboard not attached. Press F1 to continue.
50. "640K ought to be enough for anybody." - Bill Gates, 1981
51. DOS Tip #17: Add DEVICE=FNGRCROS.SYS to CONFIG.SYS
52. Hidden DOS secret: add BUGS=OFF to your CONFIG.SYS
53. Press any key... no, no, no, NOT THAT ONE!
54. Press any key to continue or any other key to quit...
55. Go ahead, make my data!
definition of a 2 ghz processor in your home machine: letting your computer wait really really fast on you
Thanks [WebCarnage] ,
Alright i am A Geek!!!!!
Have you ever considered the many possibilities of duct tape?
Yeah, new topic!!
What ways are possible to use Duct Tape, legal or other?
:D :D :D :D :D
just a useless one:)
:o :o :o :o
Overuse of smilies Part 2, Issue 1.
GABBA GABBA HEY!!
Anybody here know how to make the mixed drink called a Girl Scout Cookie? I know it has Jagermeister in it, but after that I'm lost.
just for taking a few pages
Living with DOS: Intermediate BATch Tutorial
by Barry Simon
Copyright (c) 1986, Capital PC User Group Inc.
This material may be republished only for internal use
by other not-for-profit user groups.
Additional material copyright (c) 1986, Barry Simon
Posted on Compuserve with permission of CPCUG. May not be
reproduced without including the above copyright notice.
Published in the November 1986 issue of the Capital PC Monitor.
Introduction
One of the tools that most distinguishes the experienced DOS user
from others is the effective use of BATch files. In this article, I
will discuss some of the more advanced features of BATch files and
their commands. I call this tutorial "intermediate" because I have
tried to write in a manner accessible to those with only a little
experience writing BATch files.
Simple BATch files
To begin with, a BATch file is a set of DOS commands which you
place together and which you can issue by just typing the name of
the batch file. The classic example is the batch file which
changes to the directory containing Lotus' 123 and then runs 123.
The same idea can be carried much further; for example, when I execute
my word processor with a batch file, it
o loads the proper set of macros in by keyboard macro program;
o makes a mark using Kokkennen's MARK/RELEASE package;
o loads my thesaurus;
o loads the appropriate mouse menu program;
o runs the words processor; and
o after I am finished with the word processor, clears the macros and
runs RELEASE to boot the thesaurus and mouse menu from memory.
BATch files must be pure ASCII text files with separate commands
on distinct lines separated by carriage return/line feed pairs.
To create your BATch files, you can use EDLIN, a text editor, or any
word processor that produces straight ASCII text files.
BATch programs can contain DOS commands, application program commands,
or a variety of specialized programming features that are known as
BATch commands.
BATch Commands and Features
Parameters
Your editor may allow you to specify a text file to use as a
parameter on the command line loading it. You would like to
specify the file name as a parameter on the command line calling a
BATch file to start your editor and have this file name passed on
to the editor when it is loaded. This is quite easy. If your
editor is called EDITOR.EXE and you load it via a BATch file
called foo.bat, you need only make the line calling the editor
say:
editor %1
and then call up the BATch file as
foo filename
When the BATch processor comes to the %1, it looks for the first
parameter following "foo" and replaces %1 by that parameter, in
this case by filename.
To be more precise, DOS parses the command line calling the BATch
file into distinct "words" separated by one of four delimiters:
<space> , ; =
That is, it looks for strings of allowed characters separated by
one or more of these special four. Any of the 256 ASCII
characters are allowed in the strings except for these four
delimiters, the three redirection characters (<,>,|) and the ASCII
nul. The first word on the command line is assigned the value %0,
the next %1, etc. Normally, %0 is just the name of the BATch file
but since "." is not a delimiter in parsing the line but is a
delimiter in ending file names, if you have a BATch file foo.bat
and type in
foo.cpcugisgreat
foo.bat will be run and %0 will have the full 17 character string
assigned to it. Similarly, since DOS knows that file names are no
more than 8 characters, the BATch file 12345678.bat will be run if
you type in
12345678ABCDEFGHIJ
but %0 will have an 18 character string. These are admittedly
curiosities but DOS curiosities have a knack of being useful
sometimes. In a real sense, DOS assigns as many parameters as
there are words on the command line, but initially you can only
access the first ten as %0 through %9. Any place that %1 appears
in the BATch file except as %%1, it will be replaced by the first
word after the filename even if that word is the empty word. Any
other time that the symbol % appears in the BATch file DOS will
strip the %-sign away except that %% is replaced by a single
percent and %%1 becomes %1 so if foo.bat has the single line:
echo %%1 has the value %1
then typing
foo junk
will issue the message
%1 has the value junk
There is no limit on the size of any individual parameter other
than the overall limitation that the entire DOS command line can
contain no more than a total of 128 characters.
To summarize, any time %i (for i=0,1,...,9) occurs in the file
except as a %%i, it will be replaced by the ith string in the
command line.
The real limitation of BATch file parameters is that they are not
variables. You cannot manipulate them by parsing them and cannot
change their values.
Labels
As a preparation for discussing BATch file GOTO commands, I need
to discuss labels. Any line beginning with the character ":" will
be skipped by the BATch processor when it gets to it. This means
that you can use such lines as remark lines which will not appear
on the screen even if echo is on (in which case lines beginning
with rem do appear). You can also place the redirection
characters <,>,| on such a line (but you cannot place such
characters on a "rem" line). And % signs are not treated
specially on such lines.
While DOS ignores such lines, the string following the : becomes a
label for the GOTO command which I'll discuss next. The first word or
the first eight characters of the first word become the name of that
label. You can also place comments after a label name if you separate
these comments with a space.
GOTO
The most significant way in which BATch files go beyond the DOS
command line concerns two logical control structures, the GOTO and
the IF commands. The line
goto <label>
will send the BATch file to the line immediately following the
line on which the label appears. If the label appears more than
once, its first appearance in the file is used. If the label does
not appear, the processing of the BATch file is abruptly ended
with the message "label not found".
GOTO's can be used for either branching or some rather crude
looping. Here is a simple example of branching. Suppose that you
wish to send control codes to your printer easily from the DOS
command line. You might prepare little files like ff.txt
containing a formfeed (control-L), or boldon.txt with the codes
for turning bold face on, etc. Then you could write a print.bat
file which began:
goto %1
:ff
copy ff.txt prn
goto end
:boldon
copy boldon.txt prn
ETC
with a label ":end" as the last line of the file.
One problem with the limited logic allowed by BATch files is the
difficulty of error checking. With the above, if you forget to
put in a parameter or put in an illegal value, you would get the
rather inelegant "label not found" message. Alternatively, you
could replace the "goto %1" with separate lines such as:
if %1 == ff, goto ff
and then place an error message, hardly a neat solution.
PAUSE
The next BATch command that I'll discuss, PAUSE, unlike GOTO and
parameters makes sense at the DOS command line. For straight DOS
usage, this is pointless but for environments like CED or TallScreen
which allow multiple commands on one line, it can be useful. What
PAUSE does is display the message:
Strike a key when ready . . .
and pause the processing of the BATch file until a key is struck.
Before the message is displayed, the keyboard buffer is flushed to
prevent any stray keystrokes left over from previous operations
from bypassing the effect of the PAUSE command.
There are three rather distinct uses of the PAUSE command. The
most well known is to allow the user to take an action like
inserting a diskette into a drive. Often, you will want to echo a
message to the screen before the PAUSE command such as:
echo Place a diskette into drive B: and ...
pause
A second use is to allow the user to see the output of some
program before the BATch file continues. Without the PAUSE, the
output might disappear too quickly to absorb. A third use that
we'll see later is as an extremely crude device for user input.
The IF command
The second and last element of flow control provided by DOS is the
IF command. Like pause, it also makes sense at the DOS command
line. The syntax is
IF (not) <comparison> <consequence>
The not is an optional part which we'll explain later. Comparison
is limited to three types:
o A test for the equality of two strings;
o A test for the existence of a file; and
o A test of the "error level".
If the comparison is true, then the command in "consequence" will
get carried out. If the word "not" is included, then
<consequence> is carried out only if the comparison fails. While
consequence is typically a GOTO statement, any acceptable DOS or
BATch command is allowed. You can even have the consequence be a
second if statement as in
if not %1 == ff if not %1 == boldon goto error
As the last line shows, the syntax for checking strings is to use
two equal signs. Strings are sequences of characters not
including the standard delimiters (space, comma, semicolon or
equal) or redirection signs. These redirection signs but not
delimiters can appear if the string or part of the string is
surrounded by single or double quotes. If an illegal string is
used, DOS will reward you with "bad command or filename". There
is a standard problem faced by users first exposed to BATch files.
Often, you will want to test for an empty string, for example to
give an error message if the user failed to provide a necessary
parameter. Empty strings are not allowed so that the line
if %1 == echo whoops
will yield "syntax error" if %1 is empty, and "bad command or
filename" if %1 has the value "echo" unless of course you have a
program named "whoops". The way out of this problem is to use the
fact that %1 is replaced where ever it is and add a dummy
parameter as in
if a%1 == a echo whoops
The possibility of looking for a file provides essential error
checking. A common example of its use is to fix the deadly move
BATch file:
copy %1 %2\%1
erase %1
This may seem like a great way of moving a file from one directory
to another so that
move foo.txt C:\junk
will move foo.txt from the current directory to junk. But if the
directory junk doesn't exist, the first line will give the error
message "Invalid directory" and the second line will erase the
file which has NOT been copied. Thus, as a protection one should
add before the "erase %1" line
if not exist %2\%1 goto end
with an appropriate label and error message. There are many other
places where such error checking can be invaluable.
Unfortunately, "if exist" works with path names only in DOS 3.x
and not in DOS 2.x.
The final if comparison, "if errorlevel", is useless within the
context of pure DOS commands since no DOS command (before DOS 3.2)
sets errorlevel. But the DOS technical reference describes how a
program can set this parameter and if you have a program that sets
it, this comparison is useful.
But I must warn you that the comparison
if errorlevel 2
is TRUE not only if the value of errorlevel is 2 but if it is 2 or
greater. Beginning with DOS 3.2, several external DOS commands
such as BACKUP, RESTORE, and FORMAT set what the DOS manual calls
"exit codes" which can be tested with "if errorlevel".
Nested and Chained BATch files
It is possible to make rather elaborate collections of BATch files
which call one another. The simplest is the equivalent of a GOTO.
If the name of another file appears as a line in one BATch file,
the new BATch file will begin and you will NOT return to the first
BATch file when the second one ends.
Particularly since the BATch control structures (GOTO and IF) do
not include CALL/RETURN processing of subroutines, one would like
to be able to call a second BATch file as a subroutine and return
to the first BATch file when the second one finished. Many books,
especially the older ones, will tell you that this is not
possible. However, in DOS 2.x and later, there is a method of
doing precisely this kind of subroutine call. This is an example
of something which is not undocumented but rather so badly
documented that many experts did not realize its potential until
some time had passed. The reason that an ordinary call to a
second BATch file does not return you to the first is that
command.com is only able to keep track of one BATch file. The
solution is to load a secondary copy of command.com to process the
second BATch file. The correct syntax is
command/c foo
to call foo.bat from another BATch file. When foo ends,
processing of the first BATch file will continue on the next line.
Several warnings are in order concerning this command. As you may
know, DOS has both internal commands like COPY and external
commands like FORMAT. That is, once command.com is loaded during
initial bootup, COPY becomes an available command while FORMAT is
a stand alone program, which provided separately on the DOS disk,
which must reside in the default directory or in the path to be
available to the user. You might think that COMMAND was an
internal command but it is external. That is, in order for a line
like
command/c foo
to work, COMMAND.COM must be available in the default directory or
in the path. In addition if you leave an old version of
COMMAND.COM somewhere on your hard disk and that happens to be the
one first found when this line is processed, you will get a
message "incompatible DOS versions". Finally, there is a warning
about the SET command discussed in the section below on global
variables.
FOR...IN...DO
FOR...IN...DO is one of DOS' most powerful and least appreciated
commands. It can be used at the DOS command line or in a BATch
file with slightly different syntax. The syntax at the DOS
command line is
for %a in (<list>) do expression(%a)
The use of a in %a is not important; you can use any letter or
number or even extended ASCII code so long as it appears in all
places. The % is important and since %'s get stripped from BATch
files, the syntax in a BATch file must be "for %%a...". The
keyword "do" must appear or you will get a "syntax error" message.
Within the () can appear a list of ASCII strings separated by the
standard delimiters. Following the keyword "do" can be any
command with %a as a parameter which will be successively replaced
by the values listed within (). For example
for %a in (file1 file2 file3) do copy %a prn
will issue three separate commands copying the three files to prn.
The power of the FOR...IN...DO construction comes because you can
include wildcards and DOS will substitute in turn each filename
satisfying the wildcard, so for example,
for %a in (file?) do copy %a prn
would do the same thing as the above command if there were no
other files with the name file?. Therefore, the greatest use of
FOR...IN...DO is to force programs which don't understand wild
cards to understand them none-the-less! For example, when I
discussed file viewers, I talked about both LIST and FILEVIEW.
LIST allows you to give wildcard filenames so "list *.doc" would
successively view all files with a doc extension. FILEVIEW does
not have this built in but you can do it yourself: rename fv.exe
[email protected] and make a one line BATch file called fv.bat saying
for %%a in (%1) do fv@ %%a
and suddenly FILEVIEW also has this capability.
You can also force commands which don't treat wildcards "properly"
to do so. For example, if you want to change the date/time stamp
on a file foo.txt to the current date and time, the command
copy/b foo.txt+,,
will do precisely that. If one replaces "foo.txt" in the above
command by *.*, DOS will create one file which is the combination
of each file in the current directory, probably not what you
intended. To change the date/time of all files use
for %a in (*.*) do copy/b %a+,,
You can combine multiple commands and wildcards as in
for %a in (*.pas *.com) do copy %a A:
If you want to stop such a command before it has run its course,
Ctrl-C will give you the opportunity to break the loop. In
addition you should be warned that a FOR...IN...DO loop is
like a BATch file: if the expression called after the keyword "do"
involves a BATch file, processing will not return to the
FOR...IN...DO loop. It will only be processed one time even if
you have several possibilities in your list. As happens for BATch
files, placing command/c will prevent the chain breaking so
for %a in (*.*) do command/c foo %a
issued at the DOS command line would run the BATch file foo.bat
successively with each file in the default directory as a
parameter.
The BATch processor is rather inefficient. It reads only one line
of the file into memory at a time (try including a line like
"erase foo.bat" in a BATch file to see what happens) although it
keeps its place by counting the byte offset (try using your editor
on foo.bat as a line in foo.bat to explore this). By using the
FOR...IN...DO command to reduce the number of lines in a BATch
file, you can speed up processing by a noticeable although not
spectacular amount (perhaps by 10%). For example, if you have a
large RAM disk and routinely copy several directories to it during
bootup try (the "\*.*" isn't needed; I include it for emphasis).
for %%a in (path1 path2) do copy %%a\*.* D: >nul
Two warnings about this procedure: you cannot include a command
with its own parameters in the list since DOS processes the list
in () one word at a time. Second, for technical reasons, I
strongly recommend against loading resident programs in such a
statement.
SHIFT
As I described above, when DOS parses the input command line to a
BATch file, only the first 10 words are available as %0 to %9.
However DOS keeps a record of the entire line. One of the things
that the SHIFT command does is provide you with access to the
other parameters. A line with the single command SHIFT drops %0
changes %1 to %0,..., %9 to %8 and makes what was the eleventh
word on the original command line into the new %9. Additional
calls to SHIFT repeat this process.
If SHIFT were only good for accessing parameters beyond the initial
ten, it would be of limited use. I cannot find any interesting
use of this aspect of the command. Its real use lies in the
possibility of having a real loop within a DOS BATch file. Here
is a sample "touch.bat" expanding the one line procedure for
updating the date/time stamp of a file:
:top
if %1x=x goto end
for %%a in (%1) do copy %%a+,,
shift
goto top
:end
With this BATch file, you can issue the command touch followed by
several parameters, each with wildcards. The basic operation is
applied to each file meeting any of the filespecs listed as
parameters. Of course one could probably do just as well with the
single line
for %%a in (%1 %2 %3 %4 %5) do copy %%a+,,
While I can develop considerable enthusiasm for the FOR...IN...DO
command, SHIFT does not evoke much excitement!
ECHO
Next, I turn to the issue of displaying information on the screen,
the primary method of communication between the writer of a BATch
file and the user. Even if you are writing BATch files for
yourself, it pays to expend some effort in making attractive,
instructive displays. By default, every line in the BATch file
appears on the screen. While this has the potential advantage of
showing the user what is going on, usually the display is so fast
that it is more distracting than useful. You can turn off the
automatic display of commands to the screen with the command
echo off
When echo is off, you can display messages by preceding the
desired communication with the keyword ECHO. The default for
BATch file should be echo off and there are patches for
COMMAND.COM to make that the default. I have avoided this patch
because such a patch is not immediately available for new versions
of DOS. Unless you make this patch, most of your BATch files
should begin with
echo off
cls
It is not necessary to turn echo on before exiting a BATch file;
it is turned back on automatically. You can suppress the prompt
on a DOS command line by typing "echo off" at the DOS prompt and
then "echo on" is necessary to restore the default.
ECHO can be a useful command. It's message is sent to standard
output which means that you can redirect it and so use it to send
codes to your printer. But be warned that a CR/LF pair is always
appended to an echo line so
echo ^L >prn
(where ^L means control-L the form feed character) will not send
only a form feed to your printer. It will send an extra line
feed. Also, you will not be able to send escape codes to your
screen or printer directly from the DOS command line. DOS reacts
to your <Esc> key by aborting the current command instead of
placing an escape character at the cursor. With many editors you
can put escape characters into a file and so write BATch files to
send escape codes to the screen or printer.
One character you may want to use is ^G (Control-G entered by
depressing the control key and hitting g). This is the "BEL"
character and will beep when sent to the screen. So
echo ^GYou made an error
will catch the user's attention. But please control yourself:
avoid putting several ^G's together. And with most printers
echo ^G >prn
will beep the printer.
A famous problem is how to use ECHO to make blank lines. A BATch
file command line with the single word "echo" will not work as
this will get the response "echo is on" or "echo is off". DOS 2.x
had a celebrated undocumented feature: "echo<space>" did produce
a blank line but relying on this undocumented feature caused grief
when DOS 3.x gave the "echo is on/off" response. Some versions of
DOS have had
echo .
(note the period) produce blank lines but this has not always been
true and has led to some rather fancy programs with installation
files showing bunches of dots on the screen. There is a rather
simple solution. To get a blank line try
echo <char 255>
where <char 255> means including the character with ASCII code
255. You can't enter this in all editors but in many (e.g.
EDLIN), you can by holding down the <Alt> key and hitting 2 5 5 on
the numeric keypad. Lest you be wary of using an undocumented
feature of DOS, this trick merely relies on the documented feature
of "echo" to send any character even those with codes above 128 to
the screen: <char 255> is a blank character. You can also use one
of these characters to anchor down a message that you don't want
to start in column one.
Even if echo is off, the last line in the BATch file will appear
on the screen if that line does not end in a carriage return /line
feed pair. For this reason, you will probably want to be sure
that the last lines in your BATch files have such a CR/LF pair at
the end. The exception is if the last line is "cls". In this
case the echo to the screen is unimportant and adding a CR/LF will
sometimes place the prompt on line three instead of line two.
Using ANSI.SYS
If you are writing for a "mass market", you cannot assume that the
user of your BATch files has ANSI.SYS installed but if you are
writing for yourself or for a colleague, you can be sure it is
installed. ANSI.SYS provides a simple way of controlling colors
and, to get really attractive screens, the location of messages.
You should consult your DOS manual (or the DOS technical reference
for DOS 3.x) to learn how to move the cursor. For example, if you
want to start with echo off and then only erase the line "echo
off" without clearing the whole screen, try:
echo off
echo <esc>[A<esc>[K
Input the Inelegant Way
One of the weaknesses of the DOS BATch processor is its inability
to accept input from the user. This is of importance not only
when writing for others. You might want a BATch file to run a
program and then ask if you wanted to make a backup. Of course,
if you knew the answer to this backup question in advance you
could write the BATch file to get such input as a parameter when
the BATch file was loaded but there is no simple way to get input
once the BATch file is running. The best way to overcome this
lack is to use one of the programs I'll be discussing in later
articles in this miniseries. Lacking that, I know of two methods
to get user input just using DOS's tools. First, Control-Break
(or Control-C) will stop a BATch file (or rather give you the
message "Terminate Batch file(y/n)?") and so you can point out to
the user the option that is always available any ways. For
example, if backing up is all that is left you could put in the
lines:
echo To prevent backup hit Control-Break; otherwise
Pause
Since you can accidentally brush a key, this is hardly an ideal
solution.
Also, you can end a BATch file by displaying a menu with choices
labelled "a,b,c" and have BATch files called a.bat, b.bat, c.bat
to run depending on the user's response.
Global variables
If one chains or nests BATch files, it is easy to pass parameters
between them by putting the parameters in the command line calling
the second BATch file. But what about BATch files called at
different times. For example, you may have noticed that the
a.bat,... procedure above seems to have the disadvantage that you
can only use it for one menu unless you use different directories
or different letter choices. Wouldn't it be better if there were
a place to put "global variables" so you could set menuchoice=1
before displaying a menu and have a.bat do different things
depending on the value of "menuchoice". Well, DOS has precisely
such global variables although a part of the procedure is
undocumented.
When COMMAND.COM is initially loaded, it sets aside a region of
memory as "the environment" which by default is 160 bytes. My
article in last November's monitor lists patches to increase this
size by patching command.com and DOS 3.1 and 3.2 have a mechanism
of increasing environment size by a command in your config.sys
file. This SHELL command option is documented in DOS 3.2 but
undocumented (and slightly different syntax) in DOS 3.1.
The environment is intended primarily to store the location of
COMMAND.COM when its transient portion needs to be loaded, your
path and prompt and information that the user can provide various
programs. However, you can also use it to store global variables
for communication between your BATch files.
Placing information into the environment is a documented DOS
command. You use SET. Thus
SET name=string
will define a global variable "name" to have the value "string".
As usual, "name" doesn't distinguish between lower and upper case;
if you look at the environment by typing "SET" with no parameters,
the variable will appear as
NAME=string
Upper and lower case are distinguished in strings. Notice also
that spaces count so that the command
SET name = string
will define another variable "NAME "(note the space).
Getting the value of a global variable is easy from within a
BATch file. If a name appears between percent signs, then DOS
will replace the string %name% by its environmental value. Thus if
you issued "set foo=fun" and later have a line like
if %foo%=fun goto success
then the BATch file will go to the label success. If foo has no
current value, %foo% is replaced by the empty string. Several
warnings are in order. First, this procedure is undocumented.
However, it has been constant from DOS 2.0 through 3.2 and is so
close to a documented procedure available to programs that it is
as likely to remain in DOS as anything that is not documented.
Second, while you can use the SET command to define variables
whose names have spaces in them or whose name begins with a
numeral, you cannot use %name% to access such variables.
A final warning. If you use command/c to nest a BATch file, DOS
makes a copy of the environment for the new shell that runs the
nested BATch file. Anything in the original environment is in the
new one so global variables are available to the new shell.
However, any changes made in the environment by the nested BATch
file via a SET command are only saved in the secondary environment
and will be lost when you return to the original BATch file.
What are global variables good for? I have placed today's date in
English (that is January 1, 1980 rather than 1-1-80) in my
environment at bootup and then I have a letter.bat which makes a
copy of a template with my address and my word processor's
formatting command and I append to this copy via
echo (char 255) %date% >>%1
Key Stacking
Wouldn't you like to call up TURBO PASCAL in a BATch file which
automatically answered Y to the opening question, hits W,
supplies the name of a file that you passed to the BATch file as a
parameter and then hit E for edit? Or wouldn't you like to have a
key struck automatically in response to the IBM logo and "hit any
key to continue" at the start of so many IBM programs? BATch
files need a command that lets you prestack some convenient
strokes in the keyboard buffer.
However, there is one crude way of providing keyboard input with
DOS tools if you can provide all the required input in advance.
For example, if you want an "erase *.*" command in a BATch file
and would like to avoid having to answer "Are you sure(Y/N)?",
prepare a file, "yes.txt" with the single line "Y" (and including
a CR/LF) and place the line
erase *.* < yes.txt
in the BATch file. Two warnings are in order here. Be sure you
have a complete set of responses or else your system will hang.
In response to the "Are you sure", you must respond Y followed by
<Enter> so if you left the CR/LF out of yes.txt, "erase" would
patiently wait for the <Enter> and wouldn't take it from the
keyboard since you told it to only take input from yes.txt.
Second, you cannot redirect input and output to a BATch file as a
whole but you can redirect input or output of individual commands
if the commands use standard I/O. Thus, you cannot make a file,
2yes.txt, with two yes lines and a foo.bat with two lines saying
"erase *.*" and use "foo<2yes.txt". Foo will still insist on
input from you.
Summary
BATch commands provide the end user with a powerful set of programming
tools to develop custom and innovative solutions for everyday computer
needs.
In future articles, I will describe some programs that can be used to
enhance the BATch commands and further extend and improve this
convenient programming tool.
Some remarks added after the publication of the article:
1. The feature of placing several filespecs with wildcards in
for..in..do is only available in DOS 3.x. DOS 2.x allows either
several elements OR one wildcarded specification.
2. You can place ONE parameter after a command name in a
for...in...do command if you separate the parameter from the
command by a :. For...in...do interprets the : as a connector
while DOS interprets it as a separator between the command and
it's parameters. Whether you can pass more than one parameter
in this manner will depend on how the command parses it's command
line parameters. For example
for %%a in (ctrlalt;tb+ emmcahce;36)
would be interpreted as if the two lines
ctrlalt tb+
emmcache 36
were issued.
3. Better than erase *.* <yes.txt would be to use piping and
echo Y|erase *.*
4. Despite what I say above, one can redirect ALL the output in a
BATch file, foo.bat by using
command/c foo >somefile.out
However, somefile.out will include all output including the prompt
for any lines issued with echo on such as the first "echo off"
line. This is probably not what you want!
///////////////////////////////////////\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
////////////////// Remember where you saw this file first : \\\\\\\\\\\\\\\\\\
----------- ITRIS, the International Technology Research Institute -----------
\\\\\\\\\ http://www.fortunecity.com/skyscrape...567/index.html /////////
\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\/////////////////////////////////////
lol, every little bit helps... so here i am
If pro is the opposite of con thenm, obviously, CONGRESS is the opposite of PROGRESS.
-Gallagher
lol
Seesssh
pwned.
Quote:
Originally posted by KorpDeath
GABBA GABBA HEY!!
Anybody here know how to make the mixed drink called a Girl Scout Cookie? I know it has Jagermeister in it, but after that I'm lost.
Girl Scout Cookie #1 [Score: 1000]
This cocktail contains Kahlua, Peppermint Schnapps, and Light Cream.
Girl Scout Cookie #2 [Score: 1000]
This cocktail contains Kahlua, Creme de Menthe, Creme de Cacao, and Cream.
Girl Scout Cookie #3 [Score: 1000]
This cocktail contains Bailey's Irish Cream, Kahlua, and Green Creme de Menthe.
Girl-Scout Cookie [Score: 1000]
This shooter contains Kahlua, Bailey's Irish Cream, Butterscotch Schnapps, and Green Creme de Menthe
Bar None Drinks
Maby if we keep on it we could make it to 25 pages, that would be some kind of record
TRIV your post is on page 35¿Quote:
Maby if we keep on it we could make it to 25 pages, that would be some kind of record