[src/trunk]: src/external/gpl2/lvm2/dist/libdm/ioctl Support device nodes tha...

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

details:   https://anonhg.NetBSD.org/src/rev/37ebb9dd004f
branches:  trunk
changeset: 446112:37ebb9dd004f
user:      mlelstv <mlelstv%NetBSD.org@localhost>
date:      Sat Nov 24 11:27:37 2018 +0000

description:
Support device nodes that have no entry in /dev, identify them by major:minor
numbers like the original Linux code.

While here, fix a memory leak.

diffstat:

 external/gpl2/lvm2/dist/libdm/ioctl/libdm-nbsd-iface.c |  72 +++++++++---------
 1 files changed, 36 insertions(+), 36 deletions(-)

diffs (142 lines):

diff -r 39d678f9802d -r 37ebb9dd004f external/gpl2/lvm2/dist/libdm/ioctl/libdm-nbsd-iface.c
--- a/external/gpl2/lvm2/dist/libdm/ioctl/libdm-nbsd-iface.c    Sat Nov 24 11:04:39 2018 +0000
+++ b/external/gpl2/lvm2/dist/libdm/ioctl/libdm-nbsd-iface.c    Sat Nov 24 11:27:37 2018 +0000
@@ -1,4 +1,4 @@
-/*      $NetBSD: libdm-nbsd-iface.c,v 1.11 2011/02/08 03:26:12 haad Exp $        */
+/*      $NetBSD: libdm-nbsd-iface.c,v 1.12 2018/11/24 11:27:37 mlelstv Exp $        */
 
 /*
  * Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
@@ -25,7 +25,9 @@
 #include <sys/sysctl.h>
 
 #include <fcntl.h>
+#include <paths.h>
 #include <dirent.h>
+#include <fts.h>
 #include <limits.h>
 
 #include <dm.h>
@@ -367,40 +369,31 @@
 }
 
 static char *
-get_dev_name(char *d_name, uint32_t d_major, uint32_t d_minor)
+get_dev_name(dev_t dev)
 {
+       static char * const dirs[2] = { _PATH_DEV, NULL };
        static char d_buf[MAXPATHLEN];
-       struct dirent *dire;
-       struct stat st;
-       DIR *dev_dir;
-
-       int err;
+       FTS *ftsp;
+       FTSENT *fe;
        char *name;
 
-       dev_dir = opendir("/dev");
-
-       while ((dire = readdir(dev_dir)) != NULL) {
-
-               if (strstr(dire->d_name, d_name) == NULL)
-                       continue;
+       if ((ftsp = fts_open(dirs, FTS_NOCHDIR | FTS_PHYSICAL, NULL)) == NULL)
+               return NULL;
 
-               snprintf(d_buf, MAXPATHLEN, "/dev/%s", dire->d_name);
-
-               if ((err = stat(d_buf, &st)) < 0)
-                       printf("stat failed with %d", err);
-
-               if (st.st_mode & S_IFBLK){
-                       if ((major(st.st_rdev) == d_major) && (minor(st.st_rdev) == d_minor)) {
-                               strncpy(d_buf, dire->d_name, strlen(dire->d_name) + 1);
+       name = NULL;
+       while ((fe = fts_read(ftsp)) != NULL) {
+               if (fe->fts_info != FTS_DEFAULT)
+                       continue;
+               if (S_ISBLK(fe->fts_statp->st_mode)) {
+                       if (fe->fts_statp->st_rdev == dev) {
+                               strlcpy(d_buf, fe->fts_path, sizeof(d_buf));
                                name = d_buf;
                                break;
                        }
                }
-
-               memset(d_buf, '0', sizeof(d_buf));
        }
 
-       (void)closedir(dev_dir);
+       fts_close(ftsp);
 
        return name;
 }
@@ -417,13 +410,15 @@
                  uint32_t dev_minor)
 {
        int r;
-       uint32_t major, dm_major;
+       uint32_t dm_major;
+       int major;
        char *name;
        mode_t mode;
        dev_t dev;
        size_t val_len,i;
        struct kinfo_drivers *kd;
 
+       major = -1;
        mode = 0;
 
        nbsd_get_dm_major(&dm_major, DM_BLOCK_MAJOR);
@@ -432,7 +427,7 @@
                return 0;
 
        if (sysctlbyname("kern.drivers",NULL,&val_len,NULL,0) < 0) {
-               printf("sysctlbyname failed");
+               printf("sysctlbyname failed\n");
                return 0;
        }
 
@@ -442,7 +437,8 @@
        }
 
        if (sysctlbyname("kern.drivers", kd, &val_len, NULL, 0) < 0) {
-               printf("sysctlbyname failed kd");
+               free(kd);
+               printf("sysctlbyname failed kd\n");
                return 0;
        }
 
@@ -453,18 +449,22 @@
                }
        }
 
-       dev = MKDEV(major,dev_minor);
-
-       mode |= S_IFBLK;
-
-       if ((name = devname(dev,mode)) == NULL)
-               name = get_dev_name(kd[i].d_name, major, dev_minor);
-
-       r = snprintf(buf, (size_t) bufsize, "/dev/%s",name);
+       if (major != -1) {
+               dev = MKDEV(major,dev_minor);
+               mode |= S_IFBLK;
+               if ((name = devname(dev,mode)) == NULL)
+                       name = get_dev_name(dev);
+       } else
+               name = NULL;
 
        free(kd);
 
-       if (r < 0 || r > bufsize - 1 || name == NULL)
+       if (name == NULL)
+               r = snprintf(buf, (size_t) bufsize, "%d:%d", dev_major, dev_minor);
+       else
+               r = snprintf(buf, (size_t) bufsize, _PATH_DEV "%s", name);
+
+       if (r < 0 || r > bufsize - 1)
                return 0;
 
        return 1;