diff options
Diffstat (limited to 'shell/ash.c')
| -rw-r--r-- | shell/ash.c | 30 |
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()) { |