vi: flush trace to disk early

[Martijn van Duren]

Hello tech@,

When debugging some crashes in vi it can come in handy if TRACE calls
are actually send to disk before the crash.

This shouldn't be a problem, since we're running debugging code anyway.

OK?

martijn@

Index: common/main.c
===================================================================
RCS file: /cvs/src/usr.bin/vi/common/main.c,v
retrieving revision 1.40
diff -u -p -r1.40 main.c
--- common/main.c       3 Jul 2017 07:01:14 -0000       1.40
+++ common/main.c       10 Nov 2017 11:13:56 -0000
@@ -188,6 +188,7 @@ editor(GS *gp, int argc, char *argv[])
                        }
                        (void)fprintf(gp->tracefp,
                            "\n===\ntrace: open %s\n", optarg);
+                       fflush(gp->tracefp);
                        break;
 #endif
                case 't':               /* Tag. */
Index: common/util.c
===================================================================
RCS file: /cvs/src/usr.bin/vi/common/util.c,v
retrieving revision 1.15
diff -u -p -r1.15 util.c
--- common/util.c       27 May 2016 09:18:11 -0000      1.15
+++ common/util.c       10 Nov 2017 11:13:56 -0000
@@ -174,6 +174,7 @@ TRACE(SCR *sp, const char *fmt, ...)
                return;
        va_start(ap, fmt);
        (void)vfprintf(tfp, fmt, ap);
+       fflush(tfp);
        va_end(ap);
 
        (void)fflush(tfp);