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avoid executing unsafe functions if we get a terminating signal while handling SIGCHLD; reject attempts to modify some attributes for readonly variables; more changes for unlocked stdio functions; quoting fixes for uncommon cases where IFS = ^A and the word is not being split

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This commit is contained in:
Chet Ramey
2024-02-20 09:53:58 -05:00
parent e1dd98a1db
commit cc51fb3c65
17 changed files with 293 additions and 49 deletions
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variables.h
+9 -1
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@@ -115,9 +115,17 @@ typedef struct _vlist {
#define att_capcase 0x0000400 /* word capitalized on assignment */
#define att_nameref 0x0000800 /* word is a name reference */
#define attmask_user 0x0000fff
#define user_attrs (att_exported|att_readonly|att_integer|att_local|att_trace|att_uppercase|att_lowercase|att_capcase|att_nameref)
#define attmask_user 0x0000fff
/* These define attributes you can set on readonly variables using declare.
You're allowed to set the readonly attribute on a readonly variable.
declare checks whether it gets +r explicitly, before testing these.
att_nameref is in there because declare performs its own validation due
to some ksh93 quirks. */
#define valid_readonly_attrs (att_exported|att_local|att_nameref|att_trace|att_readonly)
#define invalid_readonly_attrs (~valid_readonly_attrs & attmask_user)
/* Internal attributes used for bookkeeping */
#define att_invisible 0x0001000 /* cannot see */