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mufs: implement mufs_rmpath() to remove file system nodes

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This commit is contained in:
S.J.R. van Schaik 2017-06-12 14:24:51 +02:00
parent 1d52ca46a6
commit eb9b4853c0
2 changed files with 36 additions and 0 deletions
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35
source/fs/mufs/path.c
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@ -67,6 +67,41 @@ int mufs_mkpath(struct mufs *fs, const char *path, unsigned type)
return -1;
}
int mufs_rmpath(struct mufs *fs, const char *path, unsigned type)
{
struct flash_dev *dev = fs->dev;
char data[1 << dev->log2_block_size];
struct mufs_dentry *entry;
struct mufs_tree *tree;
char *s;
uint32_t va, offset, len;
if (!(s = mufs_abspath(path)))
return -1;
if (!(tree = resolve_path(fs, s, NULL))) {
free(s);
return -1;
}
offset = tree->va & ((UINT32_C(1) << dev->log2_block_size) - 1);
va = align(tree->va, dev->log2_block_size);
if (mufs_tree_read(tree, data, va, 1 << dev->log2_block_size) == 0)
return -1;
entry = (struct mufs_dentry *)(data + offset);
len = sizeof *entry + entry->path_len;
memmove(data + offset, data + offset + len,
(UINT32_C(1) << dev->log2_block_size) - offset - len);
if (mufs_tree_write(tree, data, va, 1 << dev->log2_block_size) == 0)
return -1;
return 0;
}
int mufs_stat(struct mufs *fs, const char *path, struct mufs_stat *stat)
{
if (!resolve_path(fs, path, stat))

1
source/fs/mufs/path.h
View file

@ -1,3 +1,4 @@
#pragma once
int mufs_mkpath(struct mufs *fs, const char *path, unsigned type);
int mufs_rmpath(struct mufs *fs, const char *path, unsigned type);