From 458d69d8f10d582fd7a546eabc1b555bb7337627 Mon Sep 17 00:00:00 2001
From: Alexander Polakov <polachok@gmail.com>
Date: Sun, 29 May 2011 16:05:58 +0400
Subject: [PATCH 6/8] ksh: remove backslashes in filenames using lex.

 * this also removes the check for matching pattern and
   returned filename. if it returns 1 name, then it must
   be the filename of an existing file, right? i think
   so.

   * change stat() to lstat() to complete broken links
     (from LEVAI Daniel).

 Why:

  * less ugly code
  * working completion for special characters like [], () and so
  * suggested by martynas
---
 edit.c |   31 +++++++------------------------
 lex.c  |    4 ++++
 lex.h  |    1 +
 3 files changed, 12 insertions(+), 24 deletions(-)

diff --git edit.c edit.c
index 9cdcc6d..01c2fe6 100644
--- edit.c
+++ edit.c
@@ -351,7 +351,7 @@ x_file_glob(int flags, const char *str, int slen, char ***wordsp)
 {
 	char *toglob;
 	char **words;
-	int nwords, i, idx, escaping;
+	int nwords;
 	XPtrV w;
 	struct source *s, *sold;
 
@@ -360,20 +360,6 @@ x_file_glob(int flags, const char *str, int slen, char ***wordsp)
 
 	toglob = add_glob(str, slen);
 
-	/* remove all escaping backward slashes */
-	escaping = 0;
-	for (i = 0, idx = 0; toglob[i]; i++) {
-		if (toglob[i] == '\\' && !escaping) {
-			escaping = 1;
-			continue;
-		}
-
-		toglob[idx] = toglob[i];
-		idx++;
-		if (escaping) escaping = 0;
-	}
-	toglob[idx] = '\0';
-
 	/*
 	 * Convert "foo*" (toglob) to an array of strings (words)
 	 */
@@ -381,7 +367,7 @@ x_file_glob(int flags, const char *str, int slen, char ***wordsp)
 	s = pushs(SWSTR, ATEMP);
 	s->start = s->str = toglob;
 	source = s;
-	if (yylex(ONEWORD) != LWORD) {
+	if (yylex(ONEWORD|RMBKSLSH) != LWORD) {
 		source = sold;
 		internal_errorf(0, "fileglob: substitute error");
 		return 0;
@@ -397,15 +383,12 @@ x_file_glob(int flags, const char *str, int slen, char ***wordsp)
 	if (nwords == 1) {
 		struct stat statb;
 
-		/* Check if globbing failed (returned glob pattern),
-		 * but be careful (E.g. toglob == "ab*" when the file
-		 * "ab*" exists is not an error).
-		 * Also, check for empty result - happens if we tried
-		 * to glob something which evaluated to an empty
-		 * string (e.g., "$FOO" when there is no FOO, etc).
+		/* Check if file exists, also, check for empty
+		 * result - happens if we tried to glob something
+		 * which evaluated to an empty string (e.g.,
+		 * "$FOO" when there is no FOO, etc).
 		 */
-		if ((strcmp(words[0], toglob) == 0 &&
-		    stat(words[0], &statb) < 0) ||
+		 if((lstat(words[0], &statb) < 0) ||
 		    words[0][0] == '\0') {
 			x_free_words(nwords, words);
 			words = NULL;
diff --git lex.c lex.c
index ef741c6..fe3d91d 100644
--- lex.c
+++ lex.c
@@ -299,6 +299,10 @@ yylex(int cf)
 					}
 					/* FALLTHROUGH */
 				default:
+					if (cf & RMBKSLSH) {
+						*wp++ = QCHAR, *wp++ = c;
+						break;
+					}
 					Xcheck(ws, wp);
 					if (c) { /* trailing \ is lost */
 						*wp++ = CHAR, *wp++ = '\\';
diff --git lex.h lex.h
index 0904fbd..6a0dbf9 100644
--- lex.h
+++ lex.h
@@ -113,6 +113,7 @@ typedef union {
 #define CMDWORD BIT(8)		/* parsing simple command (alias related) */
 #define HEREDELIM BIT(9)	/* parsing <<,<<- delimiter */
 #define HEREDOC BIT(10)		/* parsing heredoc */
+#define RMBKSLSH BIT(11)	/* remove backslashes */
 
 #define	HERES	10		/* max << in line */
 
-- 
1.7.5