[src/trunk]: src/usr.bin/config Add missed munmap(2) in extract_config

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

details:   https://anonhg.NetBSD.org/src/rev/9c222c6b1a88
branches:  trunk
changeset: 809903:9c222c6b1a88
user:      shm <shm%NetBSD.org@localhost>
date:      Sat Aug 08 15:52:41 2015 +0000

description:
Add missed munmap(2) in extract_config

diffstat:

 usr.bin/config/main.c |  13 ++++++++-----
 1 files changed, 8 insertions(+), 5 deletions(-)

diffs (50 lines):

diff -r 4b45f4641ee8 -r 9c222c6b1a88 usr.bin/config/main.c
--- a/usr.bin/config/main.c     Sat Aug 08 15:36:39 2015 +0000
+++ b/usr.bin/config/main.c     Sat Aug 08 15:52:41 2015 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: main.c,v 1.75 2015/06/16 21:12:19 christos Exp $       */
+/*     $NetBSD: main.c,v 1.76 2015/08/08 15:52:41 shm Exp $    */
 
 /*
  * Copyright (c) 1992, 1993
@@ -45,7 +45,7 @@
 #endif
 
 #include <sys/cdefs.h>
-__RCSID("$NetBSD: main.c,v 1.75 2015/06/16 21:12:19 christos Exp $");
+__RCSID("$NetBSD: main.c,v 1.76 2015/08/08 15:52:41 shm Exp $");
 
 #ifndef MAKE_BOOTSTRAP
 #include <sys/cdefs.h>
@@ -1582,6 +1582,7 @@
 extract_config(const char *kname, const char *cname, int cfd)
 {
        char *ptr;
+       void *base;
        int found, kfd;
        struct stat st;
        off_t i;
@@ -1594,10 +1595,11 @@
                err(EXIT_FAILURE, "cannot open %s", kname);
        if (fstat(kfd, &st) == -1)
                err(EXIT_FAILURE, "cannot stat %s", kname);
-       ptr = mmap(0, (size_t)st.st_size, PROT_READ, MAP_FILE | MAP_SHARED,
+       base = mmap(0, (size_t)st.st_size, PROT_READ, MAP_FILE | MAP_SHARED,
            kfd, 0);
-       if (ptr == MAP_FAILED)
+       if (base == MAP_FAILED)
                err(EXIT_FAILURE, "cannot mmap %s", kname);
+       ptr = base;
 
        /* Scan mmap(2)'ed region, extracting kernel configuration */
        for (i = 0; i < st.st_size; i++) {
@@ -1629,7 +1631,8 @@
        }
 
        (void)close(kfd);
-
+       (void)munmap(base, (size_t)st.st_size);
+               
        return found;
 }