>perl -MDevel::Peek -e"chomp($_=<STDIN>); Dump($_); open($fh, '<', $_)
+ or die; print <$fh>"
C:\Users\ikegami\í.txt
SV = PV(0xeaf80) at 0x2f59c8
  REFCNT = 1
  FLAGS = (POK,pPOK)
  PV = 0x2f3788 "C:\\Users\\ikegami\\\241.txt"\0
  CUR = 22
  LEN = 80
Died at -e line 1, <STDIN> line 1.

[download]

Is that encoded for my ANSI code page (1252) or my OEM code page (437)? 

>perl -MDevel::Peek -MEncode -e"Dump(encode('cp1252', chr(0xED)))
SV = PV(0x2fa570) at 0x27b210
  REFCNT = 1
  FLAGS = (TEMP,POK,pPOK)
  PV = 0x32c24f8 "\355"\0
  CUR = 1
  LEN = 8

>perl -MDevel::Peek -MEncode -e"Dump(encode('cp437', chr(0xED)))
SV = PV(0x30a570) at 0x28b210
  REFCNT = 1
  FLAGS = (TEMP,POK,pPOK)
  PV = 0x32c24f8 "\241"\0
  CUR = 1
  LEN = 8

[download]

So open() expects the name to be encoded using the ANSI code page, but it's coming from STDIN in the OEM code page. 

>perl -MDevel::Peek -MEncode=from_to -e"chomp($_=<STDIN>); from_to($_,
+ 'cp437', 'cp1252'); Dump($_); open($fh, '<', $_) or die; print <$fh>
+"
C:\Users\ikegami\í.txt
SV = PV(0x159adc0) at 0x315b58
  REFCNT = 1
  FLAGS = (POK,pPOK)
  PV = 0x344d258 "C:\\Users\\ikegami\\\355.txt"\0
  CUR = 22
  LEN = 80
ok

[download]

In broad strokes, the OEM code page is the encoding used by console apps, ANSI for others. Now how do you get those code pages? Good question.

In reply to Re^3: Character encoding in console in Windows by ikegami
in thread Character encoding in console in Windows by elef

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