[src/trunk]: src/sys/kern - move quadruplicated code into a function

[christos <christos%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/5f70dbb2b278
branches:  trunk
changeset: 454167:5f70dbb2b278
user:      christos <christos%NetBSD.org@localhost>
date:      Sat Sep 07 15:34:44 2019 +0000

description:
- move quadruplicated code into a function
- delete #if 1 and #if 0 code

diffstat:

 sys/kern/kern_exec.c |  39 ++++++++++++++-------------------------
 1 files changed, 14 insertions(+), 25 deletions(-)

diffs (103 lines):

diff -r 3660eb907197 -r 5f70dbb2b278 sys/kern/kern_exec.c
--- a/sys/kern/kern_exec.c      Sat Sep 07 13:45:30 2019 +0000
+++ b/sys/kern/kern_exec.c      Sat Sep 07 15:34:44 2019 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: kern_exec.c,v 1.478 2019/07/05 17:14:48 maxv Exp $     */
+/*     $NetBSD: kern_exec.c,v 1.479 2019/09/07 15:34:44 christos Exp $ */
 
 /*-
  * Copyright (c) 2008 The NetBSD Foundation, Inc.
@@ -59,7 +59,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: kern_exec.c,v 1.478 2019/07/05 17:14:48 maxv Exp $");
+__KERNEL_RCSID(0, "$NetBSD: kern_exec.c,v 1.479 2019/09/07 15:34:44 christos Exp $");
 
 #include "opt_exec.h"
 #include "opt_execfmt.h"
@@ -304,6 +304,14 @@
        .pa_pagesz = NCARGS
 };
 
+static void
+exec_path_free(struct execve_data *data)
+{              
+       pathbuf_stringcopy_put(data->ed_pathbuf, data->ed_pathstring);
+       pathbuf_destroy(data->ed_pathbuf);
+       PNBUF_PUT(data->ed_resolvedpathbuf);
+}
+
 /*
  * check exec:
  * given an "executable" described in the exec package's namei info,
@@ -338,25 +346,14 @@
        struct nameidata nd;
        size_t          resid;
 
-#if 1
        // grab the absolute pathbuf here before namei() trashes it.
        pathbuf_copystring(pb, epp->ep_resolvedname, PATH_MAX);
-#endif
        NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF | TRYEMULROOT, pb);
 
        /* first get the vnode */
        if ((error = namei(&nd)) != 0)
                return error;
        epp->ep_vp = vp = nd.ni_vp;
-#if 0
-       /*
-        * XXX: can't use nd.ni_pnbuf, because although pb contains an
-        * absolute path, nd.ni_pnbuf does not if the path contains symlinks.
-        */
-       /* normally this can't fail */
-       error = copystr(nd.ni_pnbuf, epp->ep_resolvedname, PATH_MAX, NULL);
-       KASSERT(error == 0);
-#endif
 
 #ifdef DIAGNOSTIC
        /* paranoia (take this out once namei stuff stabilizes) */
@@ -843,9 +840,7 @@
 
        rw_exit(&exec_lock);
 
-       pathbuf_stringcopy_put(data->ed_pathbuf, data->ed_pathstring);
-       pathbuf_destroy(data->ed_pathbuf);
-       PNBUF_PUT(data->ed_resolvedpathbuf);
+       exec_path_free(data);
 
  clrflg:
        rw_exit(&p->p_reflock);
@@ -941,9 +936,7 @@
        if (epp->ep_interp != NULL)
                vrele(epp->ep_interp);
 
-       pathbuf_stringcopy_put(data->ed_pathbuf, data->ed_pathstring);
-       pathbuf_destroy(data->ed_pathbuf);
-       PNBUF_PUT(data->ed_resolvedpathbuf);
+       exec_path_free(data);
 }
 
 static void
@@ -1313,9 +1306,7 @@
                mutex_exit(proc_lock);
        }
 
-       pathbuf_stringcopy_put(data->ed_pathbuf, data->ed_pathstring);
-       pathbuf_destroy(data->ed_pathbuf);
-       PNBUF_PUT(data->ed_resolvedpathbuf);
+       exec_path_free(data);
 #ifdef TRACE_EXEC
        DPRINTF(("%s finished\n", __func__));
 #endif
@@ -1327,9 +1318,7 @@
        if (!no_local_exec_lock)
                rw_exit(&exec_lock);
 
-       pathbuf_stringcopy_put(data->ed_pathbuf, data->ed_pathstring);
-       pathbuf_destroy(data->ed_pathbuf);
-       PNBUF_PUT(data->ed_resolvedpathbuf);
+       exec_path_free(data);
 
        /*
         * the old process doesn't exist anymore.  exit gracefully.