Changeset 43083ee in freewrt for package/configfs/src/configfs.c

Timestamp:

Jul 24, 2006, 11:41:20 AM (19 years ago)

Author:

Waldemar Brodkorb <wbx@…>

Branches:

freewrt_1_0, freewrt_2_0

Children:

84a01658

Parents:

846f220

Message:

add some more test code to configfs, js asked me to committ it, so that he get a working build environment inside buildroot

git-svn-id: ​svn://www.freewrt.org/trunk/freewrt@385 afb5a338-a214-0410-bd46-81f09a774fd1

File:

• package/configfs/src/configfs.c (modified) (1 diff)

package/configfs/src/configfs.c

@@ -1 @@
-int main() { 
-        printf("hello world\n");
-        return 0;
+/*
+ * configfs.c -  wrapper for nvram over fuse filesystem
+ *
+ * Copyright (C) 2006 Joerg Seitter <js@freewrt.org>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ *
+ */
+
+
+#include <fuse.h>
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include <fcntl.h>
+
+// needed for nvram
+#include <typedefs.h>
+#include <bcmnvram.h>
+
+static char *name, *value, buf[NVRAM_SPACE];
+
+static int nvram_getattr(const char *path, struct stat *stbuf)
+{
+    int res = 0;
+
+    memset(stbuf, 0, sizeof(struct stat));
+    if(strcmp(path, "/") == 0) {
+        stbuf->st_mode = S_IFDIR | 0755;
+        stbuf->st_nlink = 2;
+    }
+    // here we have to check if the name exists
+    else if(1) {
+        stbuf->st_mode = S_IFREG | 0444;
+        stbuf->st_nlink = 1;
+        // here we get the size, lets fix it to 42, sad but true ;)
+        stbuf->st_size = 42;
+    }
+    else
+        res = -ENOENT;
+
+    return res;
 }
+
+static int nvram_readdir(const char *path, void *buf, fuse_fill_dir_t filler,
+                         off_t offset, struct fuse_file_info *fi)
+{
+    (void) offset;
+    (void) fi;
+
+    //here we get the list of all nvram vars
+    nvram_getall(buf,sizeof(buf));
+    // iterate over one enty
+   // for (name = buf; *name; name += strlen(name) + 1)
+   // PUts_trim_cr(name);
+   // size = sizeof(struct nvram_header) + (int) name - (int) buf;
+   // fprintf(stderr, "size: %d bytes (%d left)\n", size, NVRAM_SPACE - size);
+                                                                                                        
+
+    if(strcmp(path, "/") != 0)
+        return -ENOENT;
+
+    filler(buf, ".", NULL, 0);
+    filler(buf, "..", NULL, 0);
+// here we have to put the list of files
+    filler(buf, "test_file" + 1, NULL, 0);
+
+    return 0;
+}
+
+static int nvram_open(const char *path, struct fuse_file_info *fi)
+{
+        //here we have to check if the file exists
+    if(strcmp(path, "filename") != 0)
+        return -ENOENT;
+
+    if((fi->flags & 3) != O_RDONLY)
+        return -EACCES;
+
+    return 0;
+}
+
+static int nvram_read(const char *path, char *buf, size_t size, off_t offset,
+                      struct fuse_file_info *fi)
+{
+    size_t len;
+    (void) fi;
+    //here we check if the file exists
+    if(strcmp(path, "filename") != 0)
+        return -ENOENT;
+
+    // here we put the value of the variable
+    len = strlen("this is the value");
+    if (offset < len) {
+        if (offset + size > len)
+            size = len - offset;
+        //here we copy the content 
+        memcpy(buf, "this is the value" + offset, size);
+    } else
+        size = 0;
+
+    return size;
+}
+
+// no write is implemented yet
+static struct fuse_operations nvram_oper = {
+    .getattr    = nvram_getattr,
+    .readdir    = nvram_readdir,
+    .open       = nvram_open,
+    .read       = nvram_read,
+};
+
+int main(int argc, char *argv[])
+{
+    return fuse_main(argc, argv, &nvram_oper);
+}