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Fix minor typeset attribute regressions (re: 95fe07d8, fdb9781e)

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This fixes the following regressions marked TODO in attributes.sh:

$ typeset -L 13 bar; readonly bar; typeset -p bar
typeset -r -L 0 foo		# exp.: typeset -r -L 13 foo
$ typeset -R 13 bar; readonly bar; typeset -p bar
typeset -r -R 0 bar		# exp.: typeset -r -R 13 bar
$ typeset -Z 13 baz; readonly baz; typeset -p baz
typeset -r -Z 0 -R 0 baz	# exp.: typeset -r Z 13 -R 13 baz

I've discovered that these were briefly fixed between fdb9781e (Red
Hat patch for typeset -xu/-xl) and 95fe07d8 (reversal of patch,
different -xu/-xl fix, but reintroduced these regressions).

src/cmd/ksh93/sh/name.c: nv_newattr():
- Replace check from 95fe07d8 with a new one that combines its
  approach with that of fdb9781e: do not change size (and hence
  return early) if NV_RDONLY and/or NV_EXPORT are the only
  attributes that are changing.

src/cmd/ksh93/tests/attributes.sh:
- Enable the TODO regression tests.
This commit is contained in:
Martijn Dekker 2021-02-01 23:49:02 +00:00
parent fe05350f2d
commit 0e4c4d619d
2 changed files with 5 additions and 6 deletions
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5
src/cmd/ksh93/sh/name.c
View file

@ -2966,11 +2966,10 @@ void nv_newattr (register Namval_t *np, unsigned newatts, int size)
nv_onattr(np,NV_EXPORT);
sh_envput(shp->env,np);
}
if((n^newatts)==NV_EXPORT && !trans)
/* Only EXPORT attribute has changed and thus all work has been done. */
return;
}
oldsize = nv_size(np);
if(((n^newatts) & ~(NV_EXPORT|NV_RDONLY))==0)
size = oldsize;
if((size==oldsize|| (n&NV_INTEGER)) && !trans && ((n^newatts)&~NV_NOCHANGE)==0)
{
if(size>0)

6
src/cmd/ksh93/tests/attributes.sh
View file

@ -526,16 +526,16 @@ typeset -A expect=(
[F12]='typeset -x -r -F 12 foo'
[H]='typeset -x -r -H foo'
[L]='typeset -x -r -L 0 foo'
# [L17]='typeset -x -r -L 17 foo' # TODO: outputs '-L 0'
[L17]='typeset -x -r -L 17 foo'
[Mtolower]='typeset -x -r -l foo'
[Mtoupper]='typeset -x -r -u foo'
[R]='typeset -x -r -R 0 foo'
# [R17]='typeset -x -r -R 17 foo' # TODO: outputs '-L 0'
[R17]='typeset -x -r -R 17 foo'
[X17]='typeset -x -r -X 17 foo'
[S]='typeset -x -r foo'
[T]='typeset -x -r foo'
[Z]='typeset -x -r -Z 0 -R 0 foo'
# [Z13]='typeset -x -r -Z 13 -R 13 foo' # TODO: outputs 'typeset -x -r -Z 0 -R 0 foo'
[Z13]='typeset -x -r -Z 13 -R 13 foo'
)
for flag in "${!expect[@]}"
do unset foo