CLI | Wildcard parameters proccessing
lazarus / 21-General

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Anton Shevtsov · 2024-09-11 09:03

Hi,

I want get wildcard value for my prog, but... Step-by-step

Quote[anton@dell cli]$ ls -l /tmp/*.png
-rw-r--r-- 1 anton anton  89658 сен  9 14:30
/tmp/1_2024-09-09_14-29.png
-rw-r--r-- 1 anton anton 138242 сен  9 14:30
/tmp/2_2024-09-09_14-30.png
-rw-r--r-- 1 anton anton  70511 сен 10 16:20
/tmp/lpd_2024-09-10_16-20.png
Code: Pascal  [Select][+][-]window.onload = function(){var x1 =
document.getElementById("main_content_section"); if (x1) { var x =
document.getElementsByClassName("geshi");for (var i = 0; i ./mytool -f
*.png
If debug ParamStr

Code: Pascal  [Select][+][-]window.onload = function(){var x1 =
document.getElementById("main_content_section"); if (x1) { var x =
document.getElementsByClassName("geshi");for (var i = 0; i  
 writeln('ParamCount = ',ParamCount);  for x := 1 to ParamCount do
writeln('ParamStr(',x,') = ',ParamStr(x));
 i see 4 parameters

QuoteParamCount = 4
ParamStr(1) = -f
ParamStr(2) = /tmp/1_2024-09-09_14-29.png
ParamStr(3) = /tmp/2_2024-09-09_14-30.png
ParamStr(4) = /tmp/lpd_2024-09-10_16-20.png
if i try getting with GetOptionValue('f', 'file') i get only first
filename, if GetOptionValues('f', 'file') i get array with first
filename too..

How i can get all filelist or full wildcard *.txt (for search files in
code later)?

p.s. i know about quotes
Code: Pascal  [Select][+][-]window.onload = function(){var x1 =
document.getElementById("main_content_section"); if (x1) { var x =
document.getElementsByClassName("geshi");for (var i = 0; i ./mytool -f
'*.png'but i want like md5summ and other tool way Something like this
Quote[anton@dell cli]$ md5sum /tmp/*png
d3074aae48ffd9115562c52ab1e05960  /tmp/1_2024-09-09_14-29.png
dcecf3c78ab2468d5affedbd0c58e9d8  /tmp/2_2024-09-09_14-30.png
7b11b94b02cbc80efb3cd942a22994ad  /tmp/lpd_2024-09-10_16-20.png

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MarkMLl · 2024-09-11 09:17

Get each one using ParamStr().

What is this GetOptionValue() of which you speak? Where are you
getting it from, and where is the compilable test program that shows
us what you're doing?

MarkMLl

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Anton Shevtsov · 2024-09-11 09:26

Quote from: MarkMLl on September 11, 2024, 11:17:50 amGet each one
using ParamStr().

What is this GetOptionValue() of which you speak? Where are you
getting it from, and where is the compilable test program that shows
us what you're doing?

MarkMLl

https://wiki.freepascal.org/Command_line_parameters_and_environment_va
riables#Check_for_a_parameter

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MarkMLl · 2024-09-11 10:03

Quote from: Anton Shevtsov on September 11, 2024, 11:26:49 amhttps://w
iki.freepascal.org/Command_line_parameters_and_environment_variables#C
heck_for_a_parameter

That's for Lazarus, not general FPC etc., for which the available
facilities are documented at https://www.freepascal.org/docs.html

Post a program demonstrating the problem.

MarkMLl

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Bart · 2024-09-11 13:03

It's the shell (Bash?) that expands the wildcards.
If you would run the same program on Windows you would get:
Code: [Select]ParamCount = 2
ParamStr(1) = -f
ParamStr(2) = *.png

This is especially annoying if e.g. your program wants to perform an
action on each .png whilst recuring directories.

Bart

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MarkMLl · 2024-09-11 15:53

Quote from: Bart on September 11, 2024, 03:03:07 pmIt's the shell
(Bash?) that expands the wildcards.

I assumed he knew that because he said that he was aware of the
quoting issue.

MarkMLl

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Remy Lebeau · 2024-09-11 23:56

Quote from: Anton Shevtsov on September 11, 2024, 11:03:57 amif i try
getting with GetOptionValue('f', 'file') i get only first filename, if
GetOptionValues('f', 'file') i get array with first filename too..

Makes sense, because the Shell is expanding the wildcard before the
parameters are sent to your app.  So GetOptionValue/s have no idea
that a wildcard was ever used, they are just pulling whatever the next
parameter is after '-f'.

Quote from: Anton Shevtsov on September 11, 2024, 11:03:57 amHow i can
get all filelist or full wildcard *.txt (for search files in code
later)?

Use ParamStr() directly.  Loop through ParamCount(), and when you
encounter the '-f' parameter then look at the next parameter.  If it
has a wildcard then the Shell didn't expand it so you can use that
parameter value with FindFirst/Next() (or equivalent) to loop through
the file paths yourself.  Otherwise, the Shell did expand the wildcard
(or no wildcard was provided) so look at all of the parameters
following '-f' until you reach the next option or the parameter list
is exhausted.

For example, something like this:

Code: Pascal  [Select][+][-]window.onload = function(){var x1 =
document.getElementById("main_content_section"); if (x1) { var x =
document.getElementsByClassName("geshi");for (var i = 0; i count :=
ParamCount;files := TStringList.Create;x := 1;while x <= count
dobegin  ...  param := ParamStr(x); Inc(x);  if param = '-f' then 
begin     param := ParamStr(x); Inc(x);    if (Pos('*', param) <> 0)
or (Pos('?', param) <> 0) then    begin      folder :=
IncludeTrailingPathDelimiter(ExtractFilePath(param));      if
FindFirst(param, faAnyFile, sr) = 0 then      try        repeat      
  if (sr.Name <> '.') and (sr.Name <> '..') and ((sr.Attr and
faDirectory) = 0) then            files.Add(folder + sr.Name);       
until FindNext(sr) = 0;      finally        FindClose(sr);      end; 
 end else    begin      files.Add(param);      while x <= count do   
 begin        param := ParamStr(x);        if param[1] = '-' then
Break;        files.Add(param);        Inc(x);      end;    end;  end 
...end; // use files as needed... files.Free;

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Bart · 2024-09-12 09:21

Quote from: Remy Lebeau on September 12, 2024, 01:56:58 amQuote from:
Anton Shevtsov on September 11, 2024, 11:03:57 amHow i can get all
filelist or full wildcard *.txt (for search files in code later)?

Use ParamStr() directly.

That won't help, as the shell already expanded the wildcard (see my
reply #4 in this thread).

Bart

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ASBzone · 2024-09-12 17:18

Quote from: Anton Shevtsov on September 11, 2024, 11:03:57 am
Code: Pascal  [Select][+][-]window.onload = function(){var x1 =
document.getElementById("main_content_section"); if (x1) { var x =
document.getElementsByClassName("geshi");for (var i = 0; i ./mytool -f
*.png
If debug ParamStr

Code: Pascal  [Select][+][-]window.onload = function(){var x1 =
document.getElementById("main_content_section"); if (x1) { var x =
document.getElementsByClassName("geshi");for (var i = 0; i  
 writeln('ParamCount = ',ParamCount);  for x := 1 to ParamCount do
writeln('ParamStr(',x,') = ',ParamStr(x));
 i see 4 parameters

QuoteParamCount = 4
ParamStr(1) = -f
ParamStr(2) = /tmp/1_2024-09-09_14-29.png
ParamStr(3) = /tmp/2_2024-09-09_14-30.png
ParamStr(4) = /tmp/lpd_2024-09-10_16-20.png


What happens if you put quotes around the command?


Code: Pascal  [Select][+][-]window.onload = function(){var x1 =
document.getElementById("main_content_section"); if (x1) { var x =
document.getElementsByClassName("geshi");for (var i = 0; i ./mytool
"-f *.png"
or


Code: Pascal  [Select][+][-]window.onload = function(){var x1 =
document.getElementById("main_content_section"); if (x1) { var x =
document.getElementsByClassName("geshi");for (var i = 0; i ./mytool -f
"*.png"

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Remy Lebeau · 2024-09-12 17:36

Quote from: ASBzone on September 12, 2024, 07:18:40 pmWhat happens if
you put quotes around the command?

Code: Pascal  [Select][+][-]window.onload = function(){var x1 =
document.getElementById("main_content_section"); if (x1) { var x =
document.getElementsByClassName("geshi");for (var i = 0; i ./mytool
"-f *.png"
That would be passed to the app as a single parameter, not as separate
parameters.

Quote from: ASBzone on September 12, 2024, 07:18:40 pmor

Code: Pascal  [Select][+][-]window.onload = function(){var x1 =
document.getElementById("main_content_section"); if (x1) { var x =
document.getElementsByClassName("geshi");for (var i = 0; i ./mytool -f
"*.png"
The bash Shell doesn't expand wildcards inside of a quoted string.

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MarkMLl · 2024-09-12 17:47

Quote from: Remy Lebeau on September 12, 2024, 07:36:52 pmThe bash
Shell doesn't expand wildcards inside of a quoted string.

OP says

Quotep.s. i know about quotes

so I think we really need to see the code that he says is failing, and
know his precise expectations.

MarkMLl