svn commit: r193169 - head/bin/sh

[Stefan Farfeleder]

Author: stefanf
Date: Sun May 31 12:36:14 2009
New Revision: 193169
URL: http://svn.freebsd.org/changeset/base/193169

Log:
  Fix the eval command in combination with set -e.  Before this change the shell
  would always terminate if eval returned with a non-zero exit status regardless
  if the status was actually tested.  Unfortunately a new file-scope variable
  is needed, the alternative would only be to add a new parameter to all
  built-ins.
  
  PR:	134881

Modified:
  head/bin/sh/eval.c
  head/bin/sh/eval.h
  head/bin/sh/histedit.c
  head/bin/sh/main.c
  head/bin/sh/trap.c

Modified: head/bin/sh/eval.c
==============================================================================
--- head/bin/sh/eval.c	Sun May 31 12:16:31 2009	(r193168)
+++ head/bin/sh/eval.c	Sun May 31 12:36:14 2009	(r193169)
@@ -83,6 +83,7 @@ MKINIT int evalskip;		/* set if we are s
 STATIC int skipcount;		/* number of levels to skip */
 MKINIT int loopnest;		/* current loop nesting level */
 int funcnest;			/* depth of function calls */
+STATIC int builtin_flags;	/* evalcommand flags for builtins */
 
 
 char *commandname;
@@ -147,7 +148,7 @@ evalcmd(int argc, char **argv)
                         STPUTC('\0', concat);
                         p = grabstackstr(concat);
                 }
-                evalstring(p);
+                evalstring(p, builtin_flags & EV_TESTED);
         }
         return exitstatus;
 }
@@ -158,7 +159,7 @@ evalcmd(int argc, char **argv)
  */
 
 void
-evalstring(char *s)
+evalstring(char *s, int flags)
 {
 	union node *n;
 	struct stackmark smark;
@@ -167,7 +168,7 @@ evalstring(char *s)
 	setinputstring(s, 1);
 	while ((n = parsecmd(0)) != NEOF) {
 		if (n != NULL)
-			evaltree(n, 0);
+			evaltree(n, flags);
 		popstackmark(&smark);
 	}
 	popfile();
@@ -839,6 +840,7 @@ evalcommand(union node *cmd, int flags, 
 		commandname = argv[0];
 		argptr = argv + 1;
 		optptr = NULL;			/* initialize nextopt */
+		builtin_flags = flags;
 		exitstatus = (*builtinfunc[cmdentry.u.index])(argc, argv);
 		flushall();
 cmddone:

Modified: head/bin/sh/eval.h
==============================================================================
--- head/bin/sh/eval.h	Sun May 31 12:16:31 2009	(r193168)
+++ head/bin/sh/eval.h	Sun May 31 12:36:14 2009	(r193169)
@@ -46,7 +46,7 @@ struct backcmd {		/* result of evalbackc
 };
 
 int evalcmd(int, char **);
-void evalstring(char *);
+void evalstring(char *, int);
 union node;	/* BLETCH for ansi C */
 void evaltree(union node *, int);
 void evalbackcmd(union node *, struct backcmd *);

Modified: head/bin/sh/histedit.c
==============================================================================
--- head/bin/sh/histedit.c	Sun May 31 12:16:31 2009	(r193168)
+++ head/bin/sh/histedit.c	Sun May 31 12:36:14 2009	(r193169)
@@ -350,7 +350,7 @@ histcmd(int argc, char **argv)
 				if (displayhist) {
 					out2str(s);
 				}
-				evalstring(s);
+				evalstring(s, 0);
 				if (displayhist && hist) {
 					/*
 					 *  XXX what about recursive and
@@ -382,7 +382,7 @@ histcmd(int argc, char **argv)
 		fclose(efp);
 		editcmd = stalloc(strlen(editor) + strlen(editfile) + 2);
 		sprintf(editcmd, "%s %s", editor, editfile);
-		evalstring(editcmd);	/* XXX - should use no JC command */
+		evalstring(editcmd, 0);	/* XXX - should use no JC command */
 		INTON;
 		readcmdfile(editfile);	/* XXX - should read back - quick tst */
 		unlink(editfile);

Modified: head/bin/sh/main.c
==============================================================================
--- head/bin/sh/main.c	Sun May 31 12:16:31 2009	(r193168)
+++ head/bin/sh/main.c	Sun May 31 12:36:14 2009	(r193169)
@@ -178,7 +178,7 @@ state2:
 state3:
 	state = 4;
 	if (minusc) {
-		evalstring(minusc);
+		evalstring(minusc, 0);
 	}
 	if (sflag || minusc == NULL) {
 state4:	/* XXX ??? - why isn't this before the "if" statement */

Modified: head/bin/sh/trap.c
==============================================================================
--- head/bin/sh/trap.c	Sun May 31 12:16:31 2009	(r193168)
+++ head/bin/sh/trap.c	Sun May 31 12:36:14 2009	(r193169)
@@ -416,7 +416,7 @@ dotrap(void)
 					if (i == SIGCHLD)
 						ignore_sigchld++;
 					savestatus = exitstatus;
-					evalstring(trap[i]);
+					evalstring(trap[i], 0);
 					exitstatus = savestatus;
 					if (i == SIGCHLD)
 						ignore_sigchld--;
@@ -471,7 +471,7 @@ exitshell(int status)
 	handler = &loc1;
 	if ((p = trap[0]) != NULL && *p != '\0') {
 		trap[0] = NULL;
-		evalstring(p);
+		evalstring(p, 0);
 	}
 l1:   handler = &loc2;			/* probably unnecessary */
 	flushall();