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BASH PATCH REPORT
=================
Bash-Release: 5.0
Patch-ID: bash50-002
Bug-Reported-by: Ante Peric <synthmeat@gmail.com>
Bug-Reference-ID: <B7E3B567-2467-4F7B-B6B9-CA4E75A9C93F@gmail.com>
Bug-Reference-URL: http://lists.gnu.org/archive/html/bug-bash/2019-01/msg00095.html
Bug-Description:
When an alias value ends with an unquoted literal tab (not part of a quoted
string or comment), alias expansion cannot correctly detect the end of the
alias value after expanding it.
--- a/parse.y
+++ b/parse.y
@@ -2557,12 +2557,14 @@ next_alias_char:
if (uc == 0 && pushed_string_list && pushed_string_list->flags != PSH_SOURCE &&
pushed_string_list->flags != PSH_DPAREN &&
(parser_state & PST_COMMENT) == 0 &&
+ (parser_state & PST_ENDALIAS) == 0 && /* only once */
shell_input_line_index > 0 &&
- shell_input_line[shell_input_line_index-1] != ' ' &&
+ shellblank (shell_input_line[shell_input_line_index-1]) == 0 &&
shell_input_line[shell_input_line_index-1] != '\n' &&
shellmeta (shell_input_line[shell_input_line_index-1]) == 0 &&
(current_delimiter (dstack) != '\'' && current_delimiter (dstack) != '"'))
{
+ parser_state |= PST_ENDALIAS;
return ' '; /* END_ALIAS */
}
#endif
@@ -2571,6 +2573,7 @@ pop_alias:
/* This case works for PSH_DPAREN as well */
if (uc == 0 && pushed_string_list && pushed_string_list->flags != PSH_SOURCE)
{
+ parser_state &= ~PST_ENDALIAS;
pop_string ();
uc = shell_input_line[shell_input_line_index];
if (uc)
--- a/parser.h
+++ b/parser.h
@@ -47,6 +47,7 @@
#define PST_REPARSE 0x040000 /* re-parsing in parse_string_to_word_list */
#define PST_REDIRLIST 0x080000 /* parsing a list of redirections preceding a simple command name */
#define PST_COMMENT 0x100000 /* parsing a shell comment; used by aliases */
+#define PST_ENDALIAS 0x200000 /* just finished expanding and consuming an alias */
/* Definition of the delimiter stack. Needed by parse.y and bashhist.c. */
struct dstack {
--- 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 1
+#define PATCHLEVEL 2
#endif /* _PATCHLEVEL_H_ */
--- a/y.tab.c
+++ b/y.tab.c
@@ -4873,12 +4873,14 @@ next_alias_char:
if (uc == 0 && pushed_string_list && pushed_string_list->flags != PSH_SOURCE &&
pushed_string_list->flags != PSH_DPAREN &&
(parser_state & PST_COMMENT) == 0 &&
+ (parser_state & PST_ENDALIAS) == 0 && /* only once */
shell_input_line_index > 0 &&
- shell_input_line[shell_input_line_index-1] != ' ' &&
+ shellblank (shell_input_line[shell_input_line_index-1]) == 0 &&
shell_input_line[shell_input_line_index-1] != '\n' &&
shellmeta (shell_input_line[shell_input_line_index-1]) == 0 &&
(current_delimiter (dstack) != '\'' && current_delimiter (dstack) != '"'))
{
+ parser_state |= PST_ENDALIAS;
return ' '; /* END_ALIAS */
}
#endif
@@ -4887,6 +4889,7 @@ pop_alias:
/* This case works for PSH_DPAREN as well */
if (uc == 0 && pushed_string_list && pushed_string_list->flags != PSH_SOURCE)
{
+ parser_state &= ~PST_ENDALIAS;
pop_string ();
uc = shell_input_line[shell_input_line_index];
if (uc)
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