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authorDenys Vlasenko <vda.linux@googlemail.com>2009-07-23 20:07:07 (GMT)
committer Denys Vlasenko <vda.linux@googlemail.com>2009-07-23 20:07:07 (GMT)
commit86e83ec4872ee1d3156a5c019fde301497819ca3 (patch)
treef3347ea1ac6178857f073d76414b30892a2f4612
parent7cc5a504658f0ebf5d7d0d457c1a907898ac68af (diff)
downloadbusybox-86e83ec4872ee1d3156a5c019fde301497819ca3.tar.gz
busybox-86e83ec4872ee1d3156a5c019fde301497819ca3.tar.bz2
ash: fix debug machinery a bit
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
-rw-r--r--shell/ash.c30
1 files changed, 18 insertions, 12 deletions
diff --git a/shell/ash.c b/shell/ash.c
index 027dc7c..3042516 100644
--- a/shell/ash.c
+++ b/shell/ash.c
@@ -640,6 +640,12 @@ union node {
struct nnot nnot;
};
+/*
+ * NODE_EOF is returned by parsecmd when it encounters an end of file.
+ * It must be distinct from NULL.
+ */
+#define NODE_EOF ((union node *) -1L)
+
struct nodelist {
struct nodelist *next;
union node *n;
@@ -954,6 +960,12 @@ shtree(union node *n, int ind, char *pfx, FILE *fp)
return;
indent(ind, pfx, fp);
+
+ if (n == NODE_EOF) {
+ fputs("<EOF>", fp);
+ return;
+ }
+
switch (n->type) {
case NSEMI:
s = "; ";
@@ -10143,12 +10155,6 @@ static char *wordtext; /* text of last word returned by readtoke
static struct nodelist *backquotelist;
static union node *redirnode;
static struct heredoc *heredoc;
-/*
- * NEOF is returned by parsecmd when it encounters an end of file. It
- * must be distinct from NULL, so we use the address of a variable that
- * happens to be handy.
- */
-#define NEOF ((union node *)&tokpushback)
/*
* Called when an unexpected token is read during the parse. The argument
@@ -11680,8 +11686,8 @@ peektoken(void)
}
/*
- * Read and parse a command. Returns NEOF on end of file. (NULL is a
- * valid parse tree indicating a blank line.)
+ * Read and parse a command. Returns NODE_EOF on end of file.
+ * (NULL is a valid parse tree indicating a blank line.)
*/
static union node *
parsecmd(int interact)
@@ -11695,7 +11701,7 @@ parsecmd(int interact)
needprompt = 0;
t = readtoken();
if (t == TEOF)
- return NEOF;
+ return NODE_EOF;
if (t == TNL)
return NULL;
tokpushback = 1;
@@ -11770,7 +11776,7 @@ evalstring(char *s, int mask)
setstackmark(&smark);
skip = 0;
- while ((n = parsecmd(0)) != NEOF) {
+ while ((n = parsecmd(0)) != NODE_EOF) {
evaltree(n, 0);
popstackmark(&smark);
skip = evalskip;
@@ -11844,10 +11850,10 @@ cmdloop(int top)
}
n = parsecmd(inter);
#if DEBUG > 2
- if (debug && (n != NEOF))
+ if (debug && (n != NODE_EOF))
showtree(n);
#endif
- if (n == NEOF) {
+ if (n == NODE_EOF) {
if (!top || numeof >= 50)
break;
if (!stoppedjobs()) {