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BASH PATCH REPORT
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=================
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Bash-Release: 4.2
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Patch-ID: bash42-012
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Bug-Reported-by: Rui Santos <rsantos@grupopie.com>
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Bug-Reference-ID: <4E04C6D0.2020507@grupopie.com>
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Bug-Reference-URL: http://lists.gnu.org/archive/html/bug-bash/2011-06/msg00079.html
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Bug-Description:
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When calling the parser to recursively parse a command substitution within
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an arithmetic expansion, the shell overwrote the saved shell input line and
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associated state, resulting in a garbled command.
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Patch (apply with `patch -p0'):
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*** ../bash-4.2-patched/parse.y 2011-02-26 19:19:05.000000000 -0500
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--- parse.y 2011-06-24 20:08:22.000000000 -0400
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***************
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*** 3843,3846 ****
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--- 3849,3853 ----
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{
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sh_parser_state_t ps;
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+ sh_input_line_state_t ls;
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int orig_ind, nc, sflags;
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char *ret, *s, *ep, *ostring;
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***************
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*** 3850,3857 ****
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--- 3857,3866 ----
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ostring = string;
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+ /*itrace("xparse_dolparen: size = %d shell_input_line = `%s'", shell_input_line_size, shell_input_line);*/
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sflags = SEVAL_NONINT|SEVAL_NOHIST|SEVAL_NOFREE;
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if (flags & SX_NOLONGJMP)
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sflags |= SEVAL_NOLONGJMP;
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save_parser_state (&ps);
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+ save_input_line_state (&ls);
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/*(*/
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***************
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*** 3862,3865 ****
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--- 3871,3876 ----
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restore_parser_state (&ps);
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reset_parser ();
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+ /* reset_parser clears shell_input_line and associated variables */
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+ restore_input_line_state (&ls);
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if (interactive)
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token_to_read = 0;
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***************
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*** 5909,5912 ****
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--- 5920,5929 ----
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ps->echo_input_at_read = echo_input_at_read;
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+ ps->token = token;
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+ ps->token_buffer_size = token_buffer_size;
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+ /* Force reallocation on next call to read_token_word */
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+ token = 0;
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+ token_buffer_size = 0;
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+
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return (ps);
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}
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***************
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*** 5950,5953 ****
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--- 5967,6006 ----
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expand_aliases = ps->expand_aliases;
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echo_input_at_read = ps->echo_input_at_read;
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+
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+ FREE (token);
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+ token = ps->token;
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+ token_buffer_size = ps->token_buffer_size;
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+ }
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+
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+ sh_input_line_state_t *
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+ save_input_line_state (ls)
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+ sh_input_line_state_t *ls;
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+ {
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+ if (ls == 0)
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+ ls = (sh_input_line_state_t *)xmalloc (sizeof (sh_input_line_state_t));
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+ if (ls == 0)
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+ return ((sh_input_line_state_t *)NULL);
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+
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+ ls->input_line = shell_input_line;
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+ ls->input_line_size = shell_input_line_size;
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+ ls->input_line_len = shell_input_line_len;
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+ ls->input_line_index = shell_input_line_index;
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+
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+ /* force reallocation */
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+ shell_input_line = 0;
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+ shell_input_line_size = shell_input_line_len = shell_input_line_index = 0;
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+ }
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+
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+ void
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+ restore_input_line_state (ls)
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+ sh_input_line_state_t *ls;
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+ {
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+ FREE (shell_input_line);
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+ shell_input_line = ls->input_line;
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+ shell_input_line_size = ls->input_line_size;
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+ shell_input_line_len = ls->input_line_len;
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+ shell_input_line_index = ls->input_line_index;
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+
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+ set_line_mbstate ();
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}
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*** ../bash-4.2-patched/shell.h 2011-01-06 22:16:55.000000000 -0500
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--- shell.h 2011-06-24 19:12:25.000000000 -0400
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***************
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*** 137,140 ****
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--- 139,145 ----
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int *token_state;
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+ char *token;
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+ int token_buffer_size;
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+
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/* input line state -- line number saved elsewhere */
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int input_line_terminator;
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***************
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*** 167,171 ****
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--- 172,186 ----
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} sh_parser_state_t;
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+ typedef struct _sh_input_line_state_t {
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+ char *input_line;
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+ int input_line_index;
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+ int input_line_size;
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+ int input_line_len;
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+ } sh_input_line_state_t;
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+
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/* Let's try declaring these here. */
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extern sh_parser_state_t *save_parser_state __P((sh_parser_state_t *));
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extern void restore_parser_state __P((sh_parser_state_t *));
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+
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+ extern sh_input_line_state_t *save_input_line_state __P((sh_input_line_state_t *));
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+ extern void restore_input_line_state __P((sh_input_line_state_t *));
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*** ../bash-4.2-patched/patchlevel.h Sat Jun 12 20:14:48 2010
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--- patchlevel.h Thu Feb 24 21:41:34 2011
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***************
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*** 26,30 ****
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looks for to find the patch level (for the sccs version string). */
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! #define PATCHLEVEL 11
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#endif /* _PATCHLEVEL_H_ */
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--- 26,30 ----
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looks for to find the patch level (for the sccs version string). */
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! #define PATCHLEVEL 12
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#endif /* _PATCHLEVEL_H_ */
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