leandrof/u-boot
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Merge branch 'master' of git://git.denx.de/u-boot-ubi

Browse Source
This commit is contained in:
Wolfgang Denk 2009-09-24 00:18:10 +02:00
commit 9a49e0e161
1 changed files with 43 additions and 25 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

68
fs/ubifs/ubifs.c
View File

@ -379,9 +379,11 @@ static unsigned long ubifs_findfile(struct super_block *sb, char *filename)
int ret;
char *next;
char fpath[128];
char symlinkpath[128];
char *name = fpath;
unsigned long root_inum = 1;
unsigned long inum;
int symlink_count = 0; /* Don't allow symlink recursion */
strcpy(fpath, filename);
@ -397,6 +399,9 @@ static unsigned long ubifs_findfile(struct super_block *sb, char *filename)
return inum;
for (;;) {
struct inode *inode;
struct ubifs_inode *ui;
/* Extract the actual part from the pathname. */
next = strchr(name, '/');
if (next) {
@ -406,18 +411,48 @@ static unsigned long ubifs_findfile(struct super_block *sb, char *filename)
}
ret = ubifs_finddir(sb, name, root_inum, &inum);
if (!ret)
return 0;
inode = ubifs_iget(sb, inum);
if (!inode)
return 0;
ui = ubifs_inode(inode);
if ((inode->i_mode & S_IFMT) == S_IFLNK) {
char link_name[64];
char buf[128];
/* We have some sort of symlink recursion, bail out */
if (symlink_count++ > 8) {
printf("Symlink recursion, aborting\n");
return 0;
}
memcpy(link_name, ui->data, ui->data_len);
link_name[ui->data_len] = '\0';
if (link_name[0] == '/') {
/* Absolute path, redo everything without
* the leading slash */
next = name = link_name + 1;
root_inum = 1;
continue;
}
/* Relative to cur dir */
sprintf(buf, "%s%s",
link_name, next == NULL ? "" : next);
memcpy(symlinkpath, buf, sizeof(buf));
next = name = symlinkpath;
continue;
}
/*
* Check if directory with this name exists
*/
/* Found the node! */
if (!next || *next == '\0') {
if (ret)
return inum;
break;
}
if (!next || *next == '\0')
return inum;
root_inum = inum;
name = next;
@ -614,10 +649,10 @@ int ubifs_load(char *filename, u32 addr, u32 size)
int err = 0;
int i;
int count;
char link_name[64];
struct ubifs_inode *ui;
c->ubi = ubi_open_volume(c->vi.ubi_num, c->vi.vol_id, UBI_READONLY);
/* ubifs_findfile will resolve symlinks, so we know that we get
* the real file here */
inum = ubifs_findfile(ubifs_sb, filename);
if (!inum) {
err = -1;
@ -634,23 +669,6 @@ int ubifs_load(char *filename, u32 addr, u32 size)
goto out;
}
/*
* Check for symbolic link
*/
ui = ubifs_inode(inode);
if (((inode->i_mode & S_IFMT) == S_IFLNK) && ui->data_len) {
memcpy(link_name, ui->data, ui->data_len);
link_name[ui->data_len] = '\0';
printf("%s is linked to %s!\n", filename, link_name);
ubifs_iput(inode);
/*
* Now we have the "real" filename, call ubifs_load()
* again (recursive call) to load this file instead
*/
return ubifs_load(link_name, addr, size);
}
/*
* If no size was specified or if size bigger than filesize
* set size to filesize