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|
--- a/shell/hush.c
+++ b/shell/hush.c
@@ -1853,7 +1853,7 @@ static void o_addblock_duplicate_backsla
while (len) {
o_addchr(o, *str);
if (*str++ == '\\'
- && (*str != '*' && *str != '?' && *str != '[')
+// && (*str != '*' && *str != '?' && *str != '[')
) {
o_addchr(o, '\\');
}
@@ -2834,18 +2834,22 @@ static NOINLINE int expand_vars_to_list(
return n;
}
-static char **expand_variables(char **argv, int or_mask)
+enum {
+ EXPVAR_FLAG_GLOB = 0x200,
+ EXPVAR_FLAG_ESCAPE_VARS = 0x100,
+ EXPVAR_FLAG_SINGLEWORD = 0x80, /* must be 0x80 */
+};
+static char **expand_variables(char **argv, unsigned or_mask)
{
int n;
char **list;
char **v;
o_string output = NULL_O_STRING;
- if (or_mask & 0x100) {
- output.o_escape = 1; /* protect against globbing for "$var" */
- /* (unquoted $var will temporarily switch it off) */
- output.o_glob = 1;
- }
+ /* protect against globbing for "$var"? */
+ /* (unquoted $var will temporarily switch it off) */
+ output.o_escape = 1 & (or_mask / EXPVAR_FLAG_ESCAPE_VARS);
+ output.o_glob = 1 & (or_mask / EXPVAR_FLAG_GLOB);
n = 0;
v = argv;
@@ -2863,13 +2867,13 @@ static char **expand_variables(char **ar
static char **expand_strvec_to_strvec(char **argv)
{
- return expand_variables(argv, 0x100);
+ return expand_variables(argv, EXPVAR_FLAG_GLOB | EXPVAR_FLAG_ESCAPE_VARS);
}
#if ENABLE_HUSH_BASH_COMPAT
static char **expand_strvec_to_strvec_singleword_noglob(char **argv)
{
- return expand_variables(argv, 0x80);
+ return expand_variables(argv, EXPVAR_FLAG_SINGLEWORD);
}
#endif
@@ -2909,15 +2913,15 @@ static char **expand_strvec_to_strvec_si
#endif
/* Used for expansion of right hand of assignments */
-/* NB: should NOT do globbing! "export v=/bin/c*; env | grep ^v=" outputs
- * "v=/bin/c*" */
+/* NB: should NOT do globbing!
+ * "export v=/bin/c*; env | grep ^v=" outputs "v=/bin/c*" */
static char *expand_string_to_string(const char *str)
{
char *argv[2], **list;
argv[0] = (char*)str;
argv[1] = NULL;
- list = expand_variables(argv, 0x80); /* 0x80: singleword expansion */
+ list = expand_variables(argv, EXPVAR_FLAG_ESCAPE_VARS | EXPVAR_FLAG_SINGLEWORD);
if (HUSH_DEBUG)
if (!list[0] || list[1])
bb_error_msg_and_die("BUG in varexp2");
@@ -2933,7 +2937,7 @@ static char* expand_strvec_to_string(cha
{
char **list;
- list = expand_variables(argv, 0x80);
+ list = expand_variables(argv, EXPVAR_FLAG_SINGLEWORD);
/* Convert all NULs to spaces */
if (list[0]) {
int n = 1;
--- /dev/null
+++ b/shell/hush_test/hush-vars/var_unbackslash.right
@@ -0,0 +1,9 @@
+b1=-qwerty-t-\-"---z-*-?-
+b1=-qwerty-t-\-"---z-*-?-
+b2=-$a-\t-\\-\"-\--\z-\*-\?-
+b2=-$a-\t-\\-\"-\--\z-\*-\?-
+c=-$a-\t-\\-\"-\--\z-\*-\?-
+c=-$a-\t-\\-\"-\--\z-\*-\?-
+c=-$a-\t-\\-\"-\--\z-\*-\?-
+c=-$a-\t-\\-\"-\--\z-\*-\?-
+Done: 0
--- /dev/null
+++ b/shell/hush_test/hush-vars/var_unbackslash.tests
@@ -0,0 +1,20 @@
+# Test for correct handling of backslashes
+a=qwerty
+
+b=-$a-\t-\\-\"-\--\z-\*-\?-
+echo b1=$b
+echo "b1=$b"
+b='-$a-\t-\\-\"-\--\z-\*-\?-'
+echo b2=$b
+echo "b2=$b"
+
+c=$b
+echo "c=$c"
+c=${b}
+echo "c=$c"
+c="$b"
+echo "c=$c"
+c="${b}"
+echo "c=$c"
+
+echo "Done: $?"
|
