Changeset 3245 for trunk

Timestamp:

Apr 30, 2007, 1:15:23 AM (18 years ago)

Author:

bird

Message:

Applied bash31-010

Location:

trunk/essentials/app-shells/bash

Files:

• parse.y (modified) (6 diffs)
• patchlevel.h (modified) (1 diff)

trunk/essentials/app-shells/bash/parse.y

@@ -2719 +2719 @@
 #define P_DQUOTE        0x04
 #define P_COMMAND       0x08    /* parsing a command, so look for comments */
+#define P_BACKQUOTE     0x10    /* parsing a backquoted command substitution */
 
 static char matched_pair_error;
@@ -2728 +2729 @@
 {
   int count, ch, was_dollar, in_comment, check_comment;
-  int pass_next_character, nestlen, ttranslen, start_lineno;
+  int pass_next_character, backq_backslash, nestlen, ttranslen, start_lineno;
   char *ret, *nestret, *ttrans;
   int retind, retsize, rflags;
 
   count = 1;
-  pass_next_character = was_dollar = in_comment = 0;
+  pass_next_character = backq_backslash = was_dollar = in_comment = 0;
   check_comment = (flags & P_COMMAND) && qc != '\'' && qc != '"' && (flags & P_DQUOTE) == 0;
 
@@ -2745 +2746 @@
   while (count)
     {
-#if 0
-      ch = shell_getc ((qc != '\'' || (flags & P_ALLOWESC)) && pass_next_character == 0);
-#else
-      ch = shell_getc (qc != '\'' && pass_next_character == 0);
-#endif
+      ch = shell_getc (qc != '\'' && pass_next_character == 0 && backq_backslash == 0);
+
       if (ch == EOF)
         {
@@ -2774 +2772 @@
         }
       /* Not exactly right yet */
-      else if (check_comment && in_comment == 0 && ch == '#' && (retind == 0 || ret[retind-1] == '\n' || whitespace (ret[retind -1])))
+      else if MBTEST(check_comment && in_comment == 0 && ch == '#' && (retind == 0 || ret[retind-1] == '\n' || whitespace (ret[retind - 1])))
         in_comment = 1;
+
+      /* last char was backslash inside backquoted command substitution */
+      if (backq_backslash)
+        {
+          backq_backslash = 0;
+          /* Placeholder for adding special characters */
+        }
 
       if (pass_next_character)          /* last char was backslash */
@@ -2817 +2822 @@
           if MBTEST((flags & P_ALLOWESC) && ch == '\\')
             pass_next_character++;
+          else if MBTEST((flags & P_BACKQUOTE) && ch == '\\')
+            backq_backslash++;
           continue;
         }
@@ -2901 +2908 @@
       else if MBTEST(qc == '`' && (ch == '"' || ch == '\'') && in_comment == 0)
         {
-          nestret = parse_matched_pair (0, ch, ch, &nestlen, rflags);
+          /* Add P_BACKQUOTE so backslash quotes the next character and
+             shell_getc does the right thing with \<newline>.  We do this for
+             a measure  of backwards compatibility -- it's not strictly the
+             right POSIX thing. */
+          nestret = parse_matched_pair (0, ch, ch, &nestlen, rflags|P_BACKQUOTE);
           goto add_nestret;
         }

trunk/essentials/app-shells/bash/patchlevel.h

@@ -26 +26 @@
    looks for to find the patch level (for the sccs version string). */
 
-#define PATCHLEVEL 9
+#define PATCHLEVEL 10
 
 #endif /* _PATCHLEVEL_H_ */