CODEWITHSUNDEEP
bashline-endings
jake2389
jake2389

Reputation: 1174

Why is bash ignoring the ending double quote (")

I have this file:

http://www.beta.inegi.org.mx/contenidos/proyectos/enchogares/especiales/endireh/2016/tabulados/I_Cuestionario_general_estimaciones_endireh2016.xlsx
http://www.beta.inegi.org.mx/contenidos/proyectos/enchogares/especiales/endireh/2016/tabulados/IV_Ingresos_y_recursos_estimaciones_endireh2016.xlsx
http://www.beta.inegi.org.mx/contenidos/proyectos/enchogares/especiales/endireh/2016/tabulados/VI_ambito_escolar_estimaciones_endireh2016.xlsx
http://www.beta.inegi.org.mx/contenidos/proyectos/enchogares/especiales/endireh/2016/tabulados/VII_ambito_laboral_estimaciones_endireh2016.xlsx
http://www.beta.inegi.org.mx/contenidos/proyectos/enchogares/especiales/endireh/2016/tabulados/VIII_ambito_comunitario_estimaciones_endireh2016.xlsx
http://www.beta.inegi.org.mx/contenidos/proyectos/enchogares/especiales/endireh/2016/tabulados/IX_Atencion_Obstetrica_estimaciones_endireh2016.xlsx
http://www.beta.inegi.org.mx/contenidos/proyectos/enchogares/especiales/endireh/2016/tabulados/X_ambito_familiar_estimaciones_endireh2016.xlsx

And this bash script:

while read p; do
        echo  "\"$p\""
done < file.txt

I would expect the same file but with double quotes around each line, but this is what bash is outputting:

"http://www.beta.inegi.org.mx/contenidos/proyectos/enchogares/especiales/endireh/2016/tabulados/I_Cuestionario_general_estimaciones_endireh2016.xlsx
"http://www.beta.inegi.org.mx/contenidos/proyectos/enchogares/especiales/endireh/2016/tabulados/IV_Ingresos_y_recursos_estimaciones_endireh2016.xlsx
"http://www.beta.inegi.org.mx/contenidos/proyectos/enchogares/especiales/endireh/2016/tabulados/VI_ambito_escolar_estimaciones_endireh2016.xlsx
"http://www.beta.inegi.org.mx/contenidos/proyectos/enchogares/especiales/endireh/2016/tabulados/VII_ambito_laboral_estimaciones_endireh2016.xlsx
"http://www.beta.inegi.org.mx/contenidos/proyectos/enchogares/especiales/endireh/2016/tabulados/VIII_ambito_comunitario_estimaciones_endireh2016.xlsx
"http://www.beta.inegi.org.mx/contenidos/proyectos/enchogares/especiales/endireh/2016/tabulados/IX_Atencion_Obstetrica_estimaciones_endireh2016.xlsx
"http://www.beta.inegi.org.mx/contenidos/proyectos/enchogares/especiales/endireh/2016/tabulados/X_ambito_familiar_estimaciones_endireh2016.xlsx

Anyone know why bash is behaving this way? And how to output both " double quotes? (beginning and end)

Upvotes: 0

Views: 91

Answers (2)

paxdiablo
paxdiablo

Reputation: 881563

I'm near certain that the line endings on your input file are CR/LF rather than just LF. This would output:

  • ";
  • the web address;
  • a CR returning the cursor to the beginning of the line;
  • "; and, finally,
  • moving to a new line.

Capture the output to a file and pass it through a dump utility like od -xcb, that should show you the raw bytes being output.

As a test, creating a file consisting of the two lines 123<CR> and 456, I see:

pax> while read p; do echo "\"$p\""; done <testfile
"123
"456"

which seems to indicate the problem is as described.

Upvotes: 3

Zachary Espiritu
Zachary Espiritu

Reputation: 987

If you're having trouble escaping the leading and trailing double quotes, you can just use single quotes around your echo statement. Any double quotes inside of single quotes have no significance in terms of defining a string literal, and vice versa:

while read p; do
        echo '"$p"'
done < file.txt

Upvotes: 0

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