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| author | Chet Ramey <chet.ramey@case.edu> | 2022-11-07 11:40:28 -0500 |
|---|---|---|
| committer | Chet Ramey <chet.ramey@case.edu> | 2022-11-07 11:40:28 -0500 |
| commit | 30e948e80b1322c295a19246786dea779ca8c81a (patch) | |
| tree | 693bef9c9ae88a3e54e2d99d0771ded84356685f | |
| parent | 3039110d0884ab0c52e46d369f0c55f79b1f8288 (diff) | |
| download | bash-30e948e80b1322c295a19246786dea779ca8c81a.tar.gz | |
Bash-5.2 patch 4: fix for nested brace expansions and brackets
| -rw-r--r-- | patchlevel.h | 2 | ||||
| -rw-r--r-- | subst.c | 8 |
2 files changed, 9 insertions, 1 deletions
diff --git a/patchlevel.h b/patchlevel.h index 40f26f7b..16233d5a 100644 --- a/patchlevel.h +++ b/patchlevel.h @@ -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 3 +#define PATCHLEVEL 4 #endif /* _PATCHLEVEL_H_ */ @@ -1798,6 +1798,9 @@ extract_heredoc_dolbrace_string (string, sindex, quoted, flags) return (result); } +#define PARAMEXPNEST_MAX 32 // for now +static int dbstate[PARAMEXPNEST_MAX]; + /* Extract a parameter expansion expression within ${ and } from STRING. Obey the Posix.2 rules for finding the ending `}': count braces while skipping over enclosed quoted strings and command substitutions. @@ -1828,6 +1831,8 @@ extract_dollar_brace_string (string, sindex, quoted, flags) if (quoted == Q_HERE_DOCUMENT && dolbrace_state == DOLBRACE_QUOTE && (flags & SX_NOALLOC) == 0) return (extract_heredoc_dolbrace_string (string, sindex, quoted, flags)); + dbstate[0] = dolbrace_state; + pass_character = 0; nesting_level = 1; slen = strlen (string + *sindex) + *sindex; @@ -1852,6 +1857,8 @@ extract_dollar_brace_string (string, sindex, quoted, flags) if (string[i] == '$' && string[i+1] == LBRACE) { + if (nesting_level < PARAMEXPNEST_MAX) + dbstate[nesting_level] = dolbrace_state; nesting_level++; i += 2; if (dolbrace_state == DOLBRACE_QUOTE || dolbrace_state == DOLBRACE_WORD) @@ -1864,6 +1871,7 @@ extract_dollar_brace_string (string, sindex, quoted, flags) nesting_level--; if (nesting_level == 0) break; + dolbrace_state = (nesting_level < PARAMEXPNEST_MAX) ? dbstate[nesting_level] : dbstate[0]; /* Guess using initial state */ i++; continue; } |