cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

fstree.c (1557B)

      1// SPDX-License-Identifier: GPL-2.0-or-later
      2/*
      3 * (C) Copyright David Gibson <dwg@au1.ibm.com>, IBM Corporation.  2005.
      4 */
      5
      6#include "dtc.h"
      7
      8#include <dirent.h>
      9#include <sys/stat.h>
     10
     11static struct node *read_fstree(const char *dirname)
     12{
     13	DIR *d;
     14	struct dirent *de;
     15	struct stat st;
     16	struct node *tree;
     17
     18	d = opendir(dirname);
     19	if (!d)
     20		die("Couldn't opendir() \"%s\": %s\n", dirname, strerror(errno));
     21
     22	tree = build_node(NULL, NULL, NULL);
     23
     24	while ((de = readdir(d)) != NULL) {
     25		char *tmpname;
     26
     27		if (streq(de->d_name, ".")
     28		    || streq(de->d_name, ".."))
     29			continue;
     30
     31		tmpname = join_path(dirname, de->d_name);
     32
     33		if (stat(tmpname, &st) < 0)
     34			die("stat(%s): %s\n", tmpname, strerror(errno));
     35
     36		if (S_ISREG(st.st_mode)) {
     37			struct property *prop;
     38			FILE *pfile;
     39
     40			pfile = fopen(tmpname, "rb");
     41			if (! pfile) {
     42				fprintf(stderr,
     43					"WARNING: Cannot open %s: %s\n",
     44					tmpname, strerror(errno));
     45			} else {
     46				prop = build_property(xstrdup(de->d_name),
     47						      data_copy_file(pfile,
     48								     st.st_size),
     49						      NULL);
     50				add_property(tree, prop);
     51				fclose(pfile);
     52			}
     53		} else if (S_ISDIR(st.st_mode)) {
     54			struct node *newchild;
     55
     56			newchild = read_fstree(tmpname);
     57			newchild = name_node(newchild, xstrdup(de->d_name));
     58			add_child(tree, newchild);
     59		}
     60
     61		free(tmpname);
     62	}
     63
     64	closedir(d);
     65	return tree;
     66}
     67
     68struct dt_info *dt_from_fs(const char *dirname)
     69{
     70	struct node *tree;
     71
     72	tree = read_fstree(dirname);
     73	tree = name_node(tree, "");
     74
     75	return build_dt_info(DTSF_V1, NULL, tree, guess_boot_cpuid(tree));
     76}