LXR linux/scripts/dtc/fstree.c

   1/*
   2 * (C) Copyright David Gibson <dwg@au1.ibm.com>, IBM Corporation.  2005.
   3 *
   4 *
   5 * This program is free software; you can redistribute it and/or
   6 * modify it under the terms of the GNU General Public License as
   7 * published by the Free Software Foundation; either version 2 of the
   8 * License, or (at your option) any later version.
   9 *
  10 *  This program is distributed in the hope that it will be useful,
  11 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13 *  General Public License for more details.
  14 *
  15 *  You should have received a copy of the GNU General Public License
  16 *  along with this program; if not, write to the Free Software
  17 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
  18 *                                                                   USA
  19 */
  20
  21#include "dtc.h"
  22
  23#include <dirent.h>
  24#include <sys/stat.h>
  25
  26static struct node *read_fstree(const char *dirname)
  27{
  28        DIR *d;
  29        struct dirent *de;
  30        struct stat st;
  31        struct node *tree;
  32
  33        d = opendir(dirname);
  34        if (!d)
  35                die("Couldn't opendir() \"%s\": %s\n", dirname, strerror(errno));
  36
  37        tree = build_node(NULL, NULL);
  38
  39        while ((de = readdir(d)) != NULL) {
  40                char *tmpnam;
  41
  42                if (streq(de->d_name, ".")
  43                    || streq(de->d_name, ".."))
  44                        continue;
  45
  46                tmpnam = join_path(dirname, de->d_name);
  47
  48                if (lstat(tmpnam, &st) < 0)
  49                        die("stat(%s): %s\n", tmpnam, strerror(errno));
  50
  51                if (S_ISREG(st.st_mode)) {
  52                        struct property *prop;
  53                        FILE *pfile;
  54
  55                        pfile = fopen(tmpnam, "r");
  56                        if (! pfile) {
  57                                fprintf(stderr,
  58                                        "WARNING: Cannot open %s: %s\n",
  59                                        tmpnam, strerror(errno));
  60                        } else {
  61                                prop = build_property(xstrdup(de->d_name),
  62                                                      data_copy_file(pfile,
  63                                                                     st.st_size));
  64                                add_property(tree, prop);
  65                                fclose(pfile);
  66                        }
  67                } else if (S_ISDIR(st.st_mode)) {
  68                        struct node *newchild;
  69
  70                        newchild = read_fstree(tmpnam);
  71                        newchild = name_node(newchild, xstrdup(de->d_name));
  72                        add_child(tree, newchild);
  73                }
  74
  75                free(tmpnam);
  76        }
  77
  78        closedir(d);
  79        return tree;
  80}
  81
  82struct boot_info *dt_from_fs(const char *dirname)
  83{
  84        struct node *tree;
  85
  86        tree = read_fstree(dirname);
  87        tree = name_node(tree, "");
  88
  89        return build_boot_info(NULL, tree, guess_boot_cpuid(tree));
  90}
  91
  92