In new BSDs changes to argv[] do not show up in ps(1) output,

[p5sagit/p5-mst-13.2.git] / mg.c

diff --git a/mg.c b/mg.c
index 84fff24..3cf8f59 100644 (file)
--- a/mg.c
+++ b/mg.c
@@ -1999,6 +1999,30 @@ Perl_magic_set(pTHX_ SV *sv, MAGIC *mg)
        break;
 #ifndef MACOS_TRADITIONAL
     case '0':
+#ifdef HAS_SETPROCTITLE
+       /* The BSDs don't show the argv[] in ps(1) output, they
+        * show a string from the process struct and provide
+        * the setproctitle() routine to manipulate that. */
+       {
+           s = SvPV(sv, len);
+#   if __FreeBSD_version >= 400000
+           /* The - removes the "perl: " prefix,
+            * but not the "(perl) suffix from the ps(1)
+            * output, because that's what ps(1) shows if the
+            * argv[] is modified. */
+           setproctitle("-%s", s, len + 1);
+#   else       /* old FreeBSDs, NetBSD, OpenBSD */
+           /* This doesn't really work if you assume that
+            * $0 = 'foobar'; will wipe out 'perl' from the $0
+            * because in ps(1) output the result will be like
+            * sprintf("perl: %s (perl)", s)
+            * I guess this is a security feature:
+            * one (a user process) cannot get rid of the original name.
+            * --jhi */
+           setproctitle("%s", s);
+#   endif
+       }
+#endif
        if (!PL_origalen) {
            s = PL_origargv[0];
            s += strlen(s);
@@ -2054,9 +2078,6 @@ Perl_magic_set(pTHX_ SV *sv, MAGIC *mg)
            for (i = 1; i < PL_origargc; i++)
                PL_origargv[i] = Nullch;
        }
-#ifdef HAS_SETPROCTITLE
-       setproctitle("%s", SvPV_nolen(sv));
-#endif
        break;
 #endif
 #ifdef USE_THREADS