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
  26 static 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
  82 struct 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 }