On a file write fail:

1. return an error value
2. show an error message

From Loganaden Velvindron with suggestion from millert@

2 files changed, 11 insertions, 9 deletions

diff --git a/usr.bin/mg/file.c b/usr.bin/mg/file.c
index df1c81fadb8..210c404b23b 100644
--- a/usr.bin/mg/file.c
+++ b/usr.bin/mg/file.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: file.c,v 1.75 2011/01/23 00:45:03 kjell Exp $	*/
+/*	$OpenBSD: file.c,v 1.76 2011/08/31 08:58:29 lum Exp $	*/
 
 /* This file is in the public domain. */
 
@@ -414,7 +414,7 @@ retry:
 	}
 endoffile:
 	/* ignore errors */
-	ffclose(NULL);
+	(void)ffclose(NULL);
 	/* don't zap an error */
 	if (s == FIOEOF) {
 		if (nline == 1)
@@ -635,9 +635,11 @@ writeout(struct buffer *bp, char *fn)
 		s = ffclose(bp);
 		if (s == FIOSUC)
 			ewprintf("Wrote %s", fn);
-	} else
-		/* ignore close error if it is a write error */
+	} else {
+		/* print a message indicating write error */
 		(void)ffclose(bp);
+		ewprintf("Unable to write %s", fn);
+	}
 	(void)fupdstat(bp);
 	return (s == FIOSUC);
 }
diff --git a/usr.bin/mg/fileio.c b/usr.bin/mg/fileio.c
index 58febf4ce75..747eed69fd3 100644
--- a/usr.bin/mg/fileio.c
+++ b/usr.bin/mg/fileio.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: fileio.c,v 1.84 2011/01/21 19:10:13 kjell Exp $	*/
+/*	$OpenBSD: fileio.c,v 1.85 2011/08/31 08:58:29 lum Exp $	*/
 
 /* This file is in the public domain. */
 
@@ -77,7 +77,7 @@ fupdstat(struct buffer *bp)
 		return (FIOERR);
 	}
 	ffstat(bp);
-	ffclose(bp);
+	(void)ffclose(bp);
 	return (FIOSUC);
 }
 
@@ -122,14 +122,14 @@ ffwopen(const char *fn, struct buffer *bp)
 
 /*
  * Close a file.
- * XXX - Should look at the status.
  */
 /* ARGSUSED */
 int
 ffclose(struct buffer *bp)
 {
-	(void) fclose(ffp);
-	return (FIOSUC);
+	if (fclose(ffp) == 0)
+		return (FIOSUC);
+	return (FIOERR);	
 }
 
 /*