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Bash-5.0 patch 10: changes to posix-mode assignment statements preceding functions and special builtins

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This commit is contained in:
Chet Ramey 2019-08-29 11:20:15 -04:00
parent 9f597fd109
commit 6a3116f58c
3 changed files with 30 additions and 16 deletions
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2
patchlevel.h
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@ -25,6 +25,6 @@
regexp `^#define[ ]*PATCHLEVEL', since that's what support/mkversion.sh
looks for to find the patch level (for the sccs version string). */
#define PATCHLEVEL 9
#define PATCHLEVEL 10
#endif /* _PATCHLEVEL_H_ */

6
tests/varenv.right
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@ -146,9 +146,9 @@ declare -x foo="abc"
inside: declare -x var="value"
outside: declare -- var="one"
inside: declare -x var="value"
outside: declare -x var="value"
inside: declare -- var="local"
outside: declare -x var="global"
outside: declare -- var="outside"
inside: declare -x var="global"
outside: declare -- var="outside"
foo=<unset> environment foo=
foo=foo environment foo=foo
foo=foo environment foo=foo

38
variables.c
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@ -4460,9 +4460,9 @@ char **tempvar_list;
int tvlist_ind;
/* Take a variable from an assignment statement preceding a posix special
builtin (including `return') and create a global variable from it. This
is called from merge_temporary_env, which is only called when in posix
mode. */
builtin (including `return') and create a variable from it as if a
standalone assignment statement had been performed. This is called from
merge_temporary_env, which is only called when in posix mode. */
static void
push_posix_temp_var (data)
PTR_T data;
@ -4472,16 +4472,27 @@ push_posix_temp_var (data)
var = (SHELL_VAR *)data;
binding_table = global_variables->table;
if (binding_table == 0)
binding_table = global_variables->table = hash_create (VARIABLES_HASH_BUCKETS);
/* Just like do_assignment_internal(). This makes assignments preceding
special builtins act like standalone assignment statements when in
posix mode, satisfying the posix requirement that this affect the
"current execution environment." */
v = bind_variable (var->name, value_cell (var), ASS_FORCE|ASS_NOLONGJMP);
v = bind_variable_internal (var->name, value_cell (var), binding_table, 0, ASS_FORCE|ASS_NOLONGJMP);
/* If this modifies an existing local variable, v->context will be non-zero.
If it comes back with v->context == 0, we bound at the global context.
Set binding_table appropriately. It doesn't matter whether it's correct
if the variable is local, only that it's not global_variables->table */
binding_table = v->context ? shell_variables->table : global_variables->table;
/* global variables are no longer temporary and don't need propagating. */
var->attributes &= ~(att_tempvar|att_propagate);
if (binding_table == global_variables->table)
var->attributes &= ~(att_tempvar|att_propagate);
if (v)
v->attributes |= var->attributes;
{
v->attributes |= var->attributes;
v->attributes &= ~att_tempvar; /* not a temp var now */
}
if (find_special_var (var->name) >= 0)
tempvar_list[tvlist_ind++] = savestring (var->name);
@ -4575,14 +4586,17 @@ dispose_temporary_env (pushf)
sh_free_func_t *pushf;
{
int i;
HASH_TABLE *disposer;
tempvar_list = strvec_create (HASH_ENTRIES (temporary_env) + 1);
tempvar_list[tvlist_ind = 0] = 0;
hash_flush (temporary_env, pushf);
hash_dispose (temporary_env);
disposer = temporary_env;
temporary_env = (HASH_TABLE *)NULL;
hash_flush (disposer, pushf);
hash_dispose (disposer);
tempvar_list[tvlist_ind] = 0;
array_needs_making = 1;