[src/trunk]: src/usr.bin/config - Factor out the remove_pspec code into a fun...

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

details:   https://anonhg.NetBSD.org/src/rev/3f3e660d7214
branches:  trunk
changeset: 827920:3f3e660d7214
user:      christos <christos%NetBSD.org@localhost>
date:      Sat Nov 18 18:41:44 2017 +0000

description:
- Factor out the remove_pspec code into a function.
- Avoid NULL pointer when printing an error.

diffstat:

 usr.bin/config/sem.c |  59 ++++++++++++++++++++++++++++++---------------------
 1 files changed, 35 insertions(+), 24 deletions(-)

diffs (104 lines):

diff -r cc1d35a2bb6b -r 3f3e660d7214 usr.bin/config/sem.c
--- a/usr.bin/config/sem.c      Sat Nov 18 18:39:16 2017 +0000
+++ b/usr.bin/config/sem.c      Sat Nov 18 18:41:44 2017 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: sem.c,v 1.77 2016/09/13 16:06:59 christos Exp $        */
+/*     $NetBSD: sem.c,v 1.78 2017/11/18 18:41:44 christos Exp $        */
 
 /*
  * Copyright (c) 1992, 1993
@@ -45,7 +45,7 @@
 #endif
 
 #include <sys/cdefs.h>
-__RCSID("$NetBSD: sem.c,v 1.77 2016/09/13 16:06:59 christos Exp $");
+__RCSID("$NetBSD: sem.c,v 1.78 2017/11/18 18:41:44 christos Exp $");
 
 #include <sys/param.h>
 #include <ctype.h>
@@ -1352,6 +1352,34 @@
 }
 
 static void
+remove_pspec(struct devi *i)
+{
+       struct pspec *p = i->i_pspec;
+       struct nvlist *nv, *onv;
+
+       if (p == NULL)
+               return;
+
+       /* Double-linked nvlist anyone? */
+       for (nv = p->p_devs; nv->nv_next != NULL; nv = nv->nv_next) {
+               if (nv->nv_next && nv->nv_next->nv_ptr == i) {
+                       onv = nv->nv_next;
+                       nv->nv_next = onv->nv_next;
+                       nvfree(onv);
+                       break;
+               }
+               if (nv->nv_ptr == i) {
+                       /* nv is p->p_devs in that case */
+                       p->p_devs = nv->nv_next;
+                       nvfree(nv);
+                       break;
+               }
+       }
+       if (p->p_devs == NULL)
+               TAILQ_REMOVE(&allpspecs, p, p_list);
+}
+
+static void
 remove_devi(struct devi *i)
 {
        struct devbase *d = i->i_base;
@@ -1453,28 +1481,8 @@
        /*
         *   - delete the pspec
         */
-       if (i->i_pspec) {
-               struct pspec *p = i->i_pspec;
-               struct nvlist *nv, *onv;
+       remove_pspec(i);
 
-               /* Double-linked nvlist anyone? */
-               for (nv = p->p_devs; nv->nv_next != NULL; nv = nv->nv_next) {
-                       if (nv->nv_next && nv->nv_next->nv_ptr == i) {
-                               onv = nv->nv_next;
-                               nv->nv_next = onv->nv_next;
-                               nvfree(onv);
-                               break;
-                       }
-                       if (nv->nv_ptr == i) {
-                               /* nv is p->p_devs in that case */
-                               p->p_devs = nv->nv_next;
-                               nvfree(nv);
-                               break;
-                       }
-               }
-               if (p->p_devs == NULL)
-                       TAILQ_REMOVE(&allpspecs, p, p_list);
-       }
        /*
         *   - delete the alldevi entry
         */
@@ -1846,6 +1854,7 @@
 fixdevis(void)
 {
        struct devi *i;
+       struct pspec *p;
        int error = 0;
 
        TAILQ_FOREACH(i, &alldevi, i_next) {
@@ -1858,9 +1867,11 @@
                         * i_at or i_pspec are NULL.
                         */
                        ++error;
+                       p = i->i_pspec;
                        cfgxerror(i->i_srcfile, i->i_lineno,
                            "`%s at %s' is orphaned (%s `%s' found)", 
-                           i->i_name, i->i_at, i->i_pspec->p_atunit == WILD ?
+                           i->i_name, i->i_at,
+                           p == NULL || p->p_atunit == WILD ?
                            "nothing matching" : "no", i->i_at);
                } else if (vflag && i->i_active == DEVI_IGNORED)
                        cfgxwarn(i->i_srcfile, i->i_lineno, "ignoring "