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Can I get the output of a command line program with TeX (using e.g. read18)?


Test success of write18Per-word info needed in DVI to create touch rectangles on LaTeX documents in iTeX for the iPadTeX command with argument BEFORE the commandTeX at the Command LineTikz externalisation not working despite enabling write 18 or shell escapesublimetext 2, auto-pst-pdf, enable shell escape, chemnumHow is the TeX engine informed of the OS's end-of-line marker and file encoding?Combine path from external program with draw in tikzDoes --no-shell-escape break pdf@shellescape?Can't execute jar from directory with umlaut













4















Say I want to call some external program using write18, which returns some text to the command line. Can I get that text from inside TeX?



As an example



> inkscape -V


returns the version of the inkscape installation, in my case



Inkscape 0.92.4 (5da689c313, 2019-01-14)


How can I retrieve this information using TeX?



(Note: I am running TeX on Windows, but would like the solution to be system independent.)










share|improve this question


















  • 1





    input|"inkscape -V" should work.

    – egreg
    4 hours ago
















4















Say I want to call some external program using write18, which returns some text to the command line. Can I get that text from inside TeX?



As an example



> inkscape -V


returns the version of the inkscape installation, in my case



Inkscape 0.92.4 (5da689c313, 2019-01-14)


How can I retrieve this information using TeX?



(Note: I am running TeX on Windows, but would like the solution to be system independent.)










share|improve this question


















  • 1





    input|"inkscape -V" should work.

    – egreg
    4 hours ago














4












4








4


1






Say I want to call some external program using write18, which returns some text to the command line. Can I get that text from inside TeX?



As an example



> inkscape -V


returns the version of the inkscape installation, in my case



Inkscape 0.92.4 (5da689c313, 2019-01-14)


How can I retrieve this information using TeX?



(Note: I am running TeX on Windows, but would like the solution to be system independent.)










share|improve this question














Say I want to call some external program using write18, which returns some text to the command line. Can I get that text from inside TeX?



As an example



> inkscape -V


returns the version of the inkscape installation, in my case



Inkscape 0.92.4 (5da689c313, 2019-01-14)


How can I retrieve this information using TeX?



(Note: I am running TeX on Windows, but would like the solution to be system independent.)







tex-core shell-escape command-line






share|improve this question













share|improve this question











share|improve this question




share|improve this question










asked 4 hours ago









schtandardschtandard

2,6991121




2,6991121








  • 1





    input|"inkscape -V" should work.

    – egreg
    4 hours ago














  • 1





    input|"inkscape -V" should work.

    – egreg
    4 hours ago








1




1





input|"inkscape -V" should work.

– egreg
4 hours ago





input|"inkscape -V" should work.

– egreg
4 hours ago










1 Answer
1






active

oldest

votes


















4














You could use input|"inkscape -V" (requires -shell-escape). However, I suggest defining a macro so that you can also manipulate the output:



documentclass{article}
usepackage{catchfile}

CatchFileDef{inkscapebanner}{|"inkscape -V"}{}

begin{document}

inkscapebanner

end{document}


enter image description here



An example of manipulation:



documentclass{article}
usepackage{catchfile}

CatchFileDef{inkscapebanner}{|"inkscape -V"}{}
makeatletter
def@getinkscapeversioninfo#1 #2 #3, #4@nil{%
definkscapeversion{#2}%
definkscapebuild{#3}%
definkscaperelease{#4}%
}
expandafter@getinkscapeversioninfoinkscapebanner@nil
makeatother

begin{document}

inkscapebannerpar
inkscapeversionpar
inkscapebuildpar
inkscapereleasepar

end{document}


enter image description here



The mandatory expl3 version:



documentclass{article}
usepackage{expl3}

ExplSyntaxOn
tl_new:N inkscapebanner
tl_new:N inkscapeversion
tl_new:N inkscapebuild
tl_new:N inkscaperelease

sys_shell_get:nnN { inkscape~-V } { char_set_catcode_space:n { `~ } } inkscapebanner
seq_set_split:NnV l_tmpa_seq { ~ } inkscapebanner
tl_set:Nx inkscapeversion { seq_item:Nn l_tmpa_seq { 2 } }
tl_set:Nx inkscapebuild { seq_item:Nn l_tmpa_seq { 3 } }
tl_set:Nx inkscapebuild { tl_range:Nnn inkscapebuild { 1 } { -1 } }
tl_set:Nx inkscaperelease { seq_item:Nn l_tmpa_seq { 4 } }

ExplSyntaxOff

begin{document}

inkscapebannerpar
inkscapeversionpar
inkscapebuildpar
inkscapereleasepar

end{document}





share|improve this answer


























  • Is the fact that input|"inkscape -V" works a TeX feature or a side effect of its implementation? A search through the TeXbook yielded nothing and this isn't really how I thought the pipe command worked either (since a pipe usually directs output from its left to the command to its right). Why does this work?

    – schtandard
    3 hours ago











  • @schtandard It's a “TeX Live addition” added a few years ago.

    – egreg
    3 hours ago






  • 1





    @schtandard You can find it with texdoc web2c, section 4.5

    – egreg
    3 hours ago











  • Thanks for the pointer! (Actually, MiKTeX doesn't find anything when asking texdoc web2c, but the manual is also available online.)

    – schtandard
    3 hours ago












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1 Answer
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active

oldest

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1 Answer
1






active

oldest

votes









active

oldest

votes






active

oldest

votes









4














You could use input|"inkscape -V" (requires -shell-escape). However, I suggest defining a macro so that you can also manipulate the output:



documentclass{article}
usepackage{catchfile}

CatchFileDef{inkscapebanner}{|"inkscape -V"}{}

begin{document}

inkscapebanner

end{document}


enter image description here



An example of manipulation:



documentclass{article}
usepackage{catchfile}

CatchFileDef{inkscapebanner}{|"inkscape -V"}{}
makeatletter
def@getinkscapeversioninfo#1 #2 #3, #4@nil{%
definkscapeversion{#2}%
definkscapebuild{#3}%
definkscaperelease{#4}%
}
expandafter@getinkscapeversioninfoinkscapebanner@nil
makeatother

begin{document}

inkscapebannerpar
inkscapeversionpar
inkscapebuildpar
inkscapereleasepar

end{document}


enter image description here



The mandatory expl3 version:



documentclass{article}
usepackage{expl3}

ExplSyntaxOn
tl_new:N inkscapebanner
tl_new:N inkscapeversion
tl_new:N inkscapebuild
tl_new:N inkscaperelease

sys_shell_get:nnN { inkscape~-V } { char_set_catcode_space:n { `~ } } inkscapebanner
seq_set_split:NnV l_tmpa_seq { ~ } inkscapebanner
tl_set:Nx inkscapeversion { seq_item:Nn l_tmpa_seq { 2 } }
tl_set:Nx inkscapebuild { seq_item:Nn l_tmpa_seq { 3 } }
tl_set:Nx inkscapebuild { tl_range:Nnn inkscapebuild { 1 } { -1 } }
tl_set:Nx inkscaperelease { seq_item:Nn l_tmpa_seq { 4 } }

ExplSyntaxOff

begin{document}

inkscapebannerpar
inkscapeversionpar
inkscapebuildpar
inkscapereleasepar

end{document}





share|improve this answer


























  • Is the fact that input|"inkscape -V" works a TeX feature or a side effect of its implementation? A search through the TeXbook yielded nothing and this isn't really how I thought the pipe command worked either (since a pipe usually directs output from its left to the command to its right). Why does this work?

    – schtandard
    3 hours ago











  • @schtandard It's a “TeX Live addition” added a few years ago.

    – egreg
    3 hours ago






  • 1





    @schtandard You can find it with texdoc web2c, section 4.5

    – egreg
    3 hours ago











  • Thanks for the pointer! (Actually, MiKTeX doesn't find anything when asking texdoc web2c, but the manual is also available online.)

    – schtandard
    3 hours ago
















4














You could use input|"inkscape -V" (requires -shell-escape). However, I suggest defining a macro so that you can also manipulate the output:



documentclass{article}
usepackage{catchfile}

CatchFileDef{inkscapebanner}{|"inkscape -V"}{}

begin{document}

inkscapebanner

end{document}


enter image description here



An example of manipulation:



documentclass{article}
usepackage{catchfile}

CatchFileDef{inkscapebanner}{|"inkscape -V"}{}
makeatletter
def@getinkscapeversioninfo#1 #2 #3, #4@nil{%
definkscapeversion{#2}%
definkscapebuild{#3}%
definkscaperelease{#4}%
}
expandafter@getinkscapeversioninfoinkscapebanner@nil
makeatother

begin{document}

inkscapebannerpar
inkscapeversionpar
inkscapebuildpar
inkscapereleasepar

end{document}


enter image description here



The mandatory expl3 version:



documentclass{article}
usepackage{expl3}

ExplSyntaxOn
tl_new:N inkscapebanner
tl_new:N inkscapeversion
tl_new:N inkscapebuild
tl_new:N inkscaperelease

sys_shell_get:nnN { inkscape~-V } { char_set_catcode_space:n { `~ } } inkscapebanner
seq_set_split:NnV l_tmpa_seq { ~ } inkscapebanner
tl_set:Nx inkscapeversion { seq_item:Nn l_tmpa_seq { 2 } }
tl_set:Nx inkscapebuild { seq_item:Nn l_tmpa_seq { 3 } }
tl_set:Nx inkscapebuild { tl_range:Nnn inkscapebuild { 1 } { -1 } }
tl_set:Nx inkscaperelease { seq_item:Nn l_tmpa_seq { 4 } }

ExplSyntaxOff

begin{document}

inkscapebannerpar
inkscapeversionpar
inkscapebuildpar
inkscapereleasepar

end{document}





share|improve this answer


























  • Is the fact that input|"inkscape -V" works a TeX feature or a side effect of its implementation? A search through the TeXbook yielded nothing and this isn't really how I thought the pipe command worked either (since a pipe usually directs output from its left to the command to its right). Why does this work?

    – schtandard
    3 hours ago











  • @schtandard It's a “TeX Live addition” added a few years ago.

    – egreg
    3 hours ago






  • 1





    @schtandard You can find it with texdoc web2c, section 4.5

    – egreg
    3 hours ago











  • Thanks for the pointer! (Actually, MiKTeX doesn't find anything when asking texdoc web2c, but the manual is also available online.)

    – schtandard
    3 hours ago














4












4








4







You could use input|"inkscape -V" (requires -shell-escape). However, I suggest defining a macro so that you can also manipulate the output:



documentclass{article}
usepackage{catchfile}

CatchFileDef{inkscapebanner}{|"inkscape -V"}{}

begin{document}

inkscapebanner

end{document}


enter image description here



An example of manipulation:



documentclass{article}
usepackage{catchfile}

CatchFileDef{inkscapebanner}{|"inkscape -V"}{}
makeatletter
def@getinkscapeversioninfo#1 #2 #3, #4@nil{%
definkscapeversion{#2}%
definkscapebuild{#3}%
definkscaperelease{#4}%
}
expandafter@getinkscapeversioninfoinkscapebanner@nil
makeatother

begin{document}

inkscapebannerpar
inkscapeversionpar
inkscapebuildpar
inkscapereleasepar

end{document}


enter image description here



The mandatory expl3 version:



documentclass{article}
usepackage{expl3}

ExplSyntaxOn
tl_new:N inkscapebanner
tl_new:N inkscapeversion
tl_new:N inkscapebuild
tl_new:N inkscaperelease

sys_shell_get:nnN { inkscape~-V } { char_set_catcode_space:n { `~ } } inkscapebanner
seq_set_split:NnV l_tmpa_seq { ~ } inkscapebanner
tl_set:Nx inkscapeversion { seq_item:Nn l_tmpa_seq { 2 } }
tl_set:Nx inkscapebuild { seq_item:Nn l_tmpa_seq { 3 } }
tl_set:Nx inkscapebuild { tl_range:Nnn inkscapebuild { 1 } { -1 } }
tl_set:Nx inkscaperelease { seq_item:Nn l_tmpa_seq { 4 } }

ExplSyntaxOff

begin{document}

inkscapebannerpar
inkscapeversionpar
inkscapebuildpar
inkscapereleasepar

end{document}





share|improve this answer















You could use input|"inkscape -V" (requires -shell-escape). However, I suggest defining a macro so that you can also manipulate the output:



documentclass{article}
usepackage{catchfile}

CatchFileDef{inkscapebanner}{|"inkscape -V"}{}

begin{document}

inkscapebanner

end{document}


enter image description here



An example of manipulation:



documentclass{article}
usepackage{catchfile}

CatchFileDef{inkscapebanner}{|"inkscape -V"}{}
makeatletter
def@getinkscapeversioninfo#1 #2 #3, #4@nil{%
definkscapeversion{#2}%
definkscapebuild{#3}%
definkscaperelease{#4}%
}
expandafter@getinkscapeversioninfoinkscapebanner@nil
makeatother

begin{document}

inkscapebannerpar
inkscapeversionpar
inkscapebuildpar
inkscapereleasepar

end{document}


enter image description here



The mandatory expl3 version:



documentclass{article}
usepackage{expl3}

ExplSyntaxOn
tl_new:N inkscapebanner
tl_new:N inkscapeversion
tl_new:N inkscapebuild
tl_new:N inkscaperelease

sys_shell_get:nnN { inkscape~-V } { char_set_catcode_space:n { `~ } } inkscapebanner
seq_set_split:NnV l_tmpa_seq { ~ } inkscapebanner
tl_set:Nx inkscapeversion { seq_item:Nn l_tmpa_seq { 2 } }
tl_set:Nx inkscapebuild { seq_item:Nn l_tmpa_seq { 3 } }
tl_set:Nx inkscapebuild { tl_range:Nnn inkscapebuild { 1 } { -1 } }
tl_set:Nx inkscaperelease { seq_item:Nn l_tmpa_seq { 4 } }

ExplSyntaxOff

begin{document}

inkscapebannerpar
inkscapeversionpar
inkscapebuildpar
inkscapereleasepar

end{document}






share|improve this answer














share|improve this answer



share|improve this answer








edited 4 hours ago

























answered 4 hours ago









egregegreg

742k8919423274




742k8919423274













  • Is the fact that input|"inkscape -V" works a TeX feature or a side effect of its implementation? A search through the TeXbook yielded nothing and this isn't really how I thought the pipe command worked either (since a pipe usually directs output from its left to the command to its right). Why does this work?

    – schtandard
    3 hours ago











  • @schtandard It's a “TeX Live addition” added a few years ago.

    – egreg
    3 hours ago






  • 1





    @schtandard You can find it with texdoc web2c, section 4.5

    – egreg
    3 hours ago











  • Thanks for the pointer! (Actually, MiKTeX doesn't find anything when asking texdoc web2c, but the manual is also available online.)

    – schtandard
    3 hours ago



















  • Is the fact that input|"inkscape -V" works a TeX feature or a side effect of its implementation? A search through the TeXbook yielded nothing and this isn't really how I thought the pipe command worked either (since a pipe usually directs output from its left to the command to its right). Why does this work?

    – schtandard
    3 hours ago











  • @schtandard It's a “TeX Live addition” added a few years ago.

    – egreg
    3 hours ago






  • 1





    @schtandard You can find it with texdoc web2c, section 4.5

    – egreg
    3 hours ago











  • Thanks for the pointer! (Actually, MiKTeX doesn't find anything when asking texdoc web2c, but the manual is also available online.)

    – schtandard
    3 hours ago

















Is the fact that input|"inkscape -V" works a TeX feature or a side effect of its implementation? A search through the TeXbook yielded nothing and this isn't really how I thought the pipe command worked either (since a pipe usually directs output from its left to the command to its right). Why does this work?

– schtandard
3 hours ago





Is the fact that input|"inkscape -V" works a TeX feature or a side effect of its implementation? A search through the TeXbook yielded nothing and this isn't really how I thought the pipe command worked either (since a pipe usually directs output from its left to the command to its right). Why does this work?

– schtandard
3 hours ago













@schtandard It's a “TeX Live addition” added a few years ago.

– egreg
3 hours ago





@schtandard It's a “TeX Live addition” added a few years ago.

– egreg
3 hours ago




1




1





@schtandard You can find it with texdoc web2c, section 4.5

– egreg
3 hours ago





@schtandard You can find it with texdoc web2c, section 4.5

– egreg
3 hours ago













Thanks for the pointer! (Actually, MiKTeX doesn't find anything when asking texdoc web2c, but the manual is also available online.)

– schtandard
3 hours ago





Thanks for the pointer! (Actually, MiKTeX doesn't find anything when asking texdoc web2c, but the manual is also available online.)

– schtandard
3 hours ago


















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