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From: Hans van der Meer <havdmeer@ziggo.nl>
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Subject: Bug in Luatex file handling?
Date: Tue, 15 Jun 2021 14:38:38 +0200
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This I cannot explain. Opening a file directly from its full name in a =
string succeeds. But doing the same from a parameter transferred from =
ConteXt to Lua succeeds if the file is in one directory deeper but fails =
if the file is two directories deeper.
I suspect there is something not ok in LuaTeX.
The lines with .... and >>>> directly come from print statements =
inserted in the Lua code.

dr. Hans van der Meer

Open file in directory 1 and 2 levels deep - direct call succeeds
..........io.open("events/hga-0372-345-62.xml","r")=3D>file =
(0x7fff97415f88)
..........io.open("events/transcripten/hga-0372-345-62.xml","r")=3D>file =
(0x7fff97416020)

Idem but now from parameter filename transferred from ConTeXt into Lua:
Open file one level deeper succeeds (printed filename comes from the =
call):
>>>>>>>>>>io.open(filename,"r") =
filename=3Devents/hga-0372-1764-63.xml=3D>file (0x7fff974160b8)
Open file two levels deeper fails:
>>>>>>>>>>io.open(filename,"r") =
filename=3Devents/transcripten/hga-0372-1764-63.xml=3D>nil

Caller:
\def\FileExist#1{\cldcontext{hvdm.existfile([=3D=3D=3D[#1]=3D=3D=3D])}}
Lua code:
hvdm.existfile =3D function (filename)
-- The test code was inserted here --
		local file =3D io.open(filename, "r")
		if file then
			file:close()
		end
		return file ~=3D nil and "true" or "false"
	end


--Apple-Mail=_51E9EF07-7DB7-41BF-B66C-B67340C90B0F
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	charset=us-ascii

<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html; =
charset=3Dus-ascii"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; line-break: after-white-space;" class=3D"">This =
I cannot explain. Opening a file directly from its full name in a string =
succeeds. But doing the same from a parameter transferred from ConteXt =
to Lua succeeds if the file is in one directory deeper but fails if the =
file is two directories deeper.<div class=3D"">I suspect there is =
something not ok in LuaTeX.</div><div class=3D"">The lines with .... and =
&gt;&gt;&gt;&gt; directly come from print statements inserted in the Lua =
code.</div><div class=3D""><br class=3D""><div class=3D"">
<div style=3D"color: rgb(0, 0, 0); letter-spacing: normal; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: =
break-word; -webkit-nbsp-mode: space; -webkit-line-break: =
after-white-space;" class=3D""><div style=3D"color: rgb(0, 0, 0); =
font-family: Helvetica; font-style: normal; font-variant-ligatures: =
normal; font-variant-caps: normal; font-variant-east-asian: normal; =
font-variant-position: normal; font-weight: normal; letter-spacing: =
normal; line-height: normal; orphans: 2; text-align: -webkit-auto; =
text-indent: 0px; text-transform: none; white-space: normal; widows: 2; =
word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: =
break-word; -webkit-nbsp-mode: space; -webkit-line-break: =
after-white-space;" class=3D"">dr. Hans van der Meer<br class=3D""><br =
class=3D""></div></div>
</div>

<div class=3D""><font face=3D"Courier" class=3D"">Open file in directory =
1 and 2 levels deep - direct call succeeds</font></div><div =
class=3D""><font face=3D"Courier" =
class=3D"">..........io.open("events/hga-0372-345-62.xml","r")=3D&gt;file =
(0x7fff97415f88)</font></div><div class=3D""><font face=3D"Courier" =
class=3D"">..........io.open("events/transcripten/hga-0372-345-62.xml","r"=
)=3D&gt;file (0x7fff97416020)</font></div><div class=3D""><font =
face=3D"Courier" class=3D""><br class=3D""></font></div><div =
class=3D""><font face=3D"Courier" class=3D"">Idem but now from parameter =
filename transferred from ConTeXt into Lua:</font></div><div =
class=3D""><font face=3D"Courier" class=3D"">Open file one level deeper =
succeeds (printed filename comes from the call):</font></div><div =
class=3D""><font face=3D"Courier" =
class=3D"">&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;io.open(filename,"r") =
filename=3Devents/hga-0372-1764-63.xml=3D&gt;file =
(0x7fff974160b8)</font></div><div class=3D""><font face=3D"Courier" =
class=3D"">Open file two levels deeper fails:</font></div><div =
class=3D""><font face=3D"Courier" =
class=3D"">&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;io.open(filename,"r") =
filename=3Devents/transcripten/hga-0372-1764-63.xml=3D&gt;nil</font></div>=
<div class=3D""><font face=3D"Courier" class=3D""><br =
class=3D""></font></div><div class=3D""><font face=3D"Courier" =
class=3D"">Caller:</font></div><div class=3D""><font face=3D"Courier" =
class=3D"">\def\FileExist#1{\cldcontext{hvdm.existfile([=3D=3D=3D[#1]=3D=3D=
=3D])}}</font></div><div class=3D""><font face=3D"Courier" class=3D"">Lua =
code:</font></div><div class=3D""><font face=3D"Courier" =
class=3D"">hvdm.existfile =3D function (filename)</font></div><div =
class=3D""><font face=3D"Courier" class=3D"">-- The test code was =
inserted here --</font></div><div class=3D""><font face=3D"Courier" =
class=3D""><span class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>local file =3D io.open(filename, "r")</font></div><div =
class=3D""><font face=3D"Courier" class=3D""><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>if file then</font></div><div class=3D""><font face=3D"Courier" =
class=3D""><span class=3D"Apple-tab-span" style=3D"white-space:pre">		=
	</span>file:close()</font></div><div class=3D""><font =
face=3D"Courier" class=3D""><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>end</font></div><div =
class=3D""><font face=3D"Courier" class=3D""><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>return file ~=3D nil and "true" or "false"</font></div><div =
class=3D""><font face=3D"Courier" class=3D""><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	=
</span>end</font></div></div><div class=3D""><br =
class=3D""></div></body></html>=

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