40 lines
1.5 KiB
Diff
40 lines
1.5 KiB
Diff
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diff --git a/subst.c b/subst.c
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--- a/subst.c
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+++ b/subst.c
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@@ -1803,6 +1803,9 @@ extract_heredoc_dolbrace_string (string, sindex, quoted, flags)
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return (result);
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}
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+#define PARAMEXPNEST_MAX 32 // for now
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+static int dbstate[PARAMEXPNEST_MAX];
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+
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/* Extract a parameter expansion expression within ${ and } from STRING.
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Obey the Posix.2 rules for finding the ending `}': count braces while
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skipping over enclosed quoted strings and command substitutions.
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@@ -1833,6 +1836,8 @@ extract_dollar_brace_string (string, sindex, quoted, flags)
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if (quoted == Q_HERE_DOCUMENT && dolbrace_state == DOLBRACE_QUOTE && (flags & SX_NOALLOC) == 0)
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return (extract_heredoc_dolbrace_string (string, sindex, quoted, flags));
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+ dbstate[0] = dolbrace_state;
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+
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pass_character = 0;
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nesting_level = 1;
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slen = strlen (string + *sindex) + *sindex;
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@@ -1857,6 +1862,8 @@ extract_dollar_brace_string (string, sindex, quoted, flags)
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if (string[i] == '$' && string[i+1] == LBRACE)
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{
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+ if (nesting_level < PARAMEXPNEST_MAX)
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+ dbstate[nesting_level] = dolbrace_state;
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nesting_level++;
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i += 2;
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if (dolbrace_state == DOLBRACE_QUOTE || dolbrace_state == DOLBRACE_WORD)
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@@ -1869,6 +1876,7 @@ extract_dollar_brace_string (string, sindex, quoted, flags)
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nesting_level--;
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if (nesting_level == 0)
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break;
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+ dolbrace_state = (nesting_level < PARAMEXPNEST_MAX) ? dbstate[nesting_level] : dbstate[0]; /* Guess using initial state */
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i++;
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continue;
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}
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