From: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
To: barebox@lists.infradead.org
Subject: [PATCH 07/18] ramfs: add symlink and readlink support
Date: Mon, 3 Sep 2012 12:08:07 +0200 [thread overview]
Message-ID: <1346666898-19347-7-git-send-email-plagnioj@jcrosoft.com> (raw)
In-Reply-To: <1346666898-19347-1-git-send-email-plagnioj@jcrosoft.com>
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
---
fs/ramfs.c | 61 ++++++++++++++++++++++++++++++++++++++++++++++++++++++------
1 file changed, 55 insertions(+), 6 deletions(-)
diff --git a/fs/ramfs.c b/fs/ramfs.c
index 91d06b8..8f3b936 100644
--- a/fs/ramfs.c
+++ b/fs/ramfs.c
@@ -42,6 +42,7 @@ struct ramfs_inode {
struct ramfs_inode *parent;
struct ramfs_inode *next;
struct ramfs_inode *child;
+ char *symlink;
ulong mode;
struct handle_d *handle;
@@ -176,6 +177,7 @@ static void ramfs_put_inode(struct ramfs_inode *node)
data = tmp;
}
+ free(node->symlink);
free(node->name);
free(node);
}
@@ -212,18 +214,38 @@ static struct ramfs_inode* node_insert(struct ramfs_inode *parent_node, const ch
/* ---------------------------------------------------------------*/
-static int ramfs_create(struct device_d *dev, const char *pathname, mode_t mode)
+static int __ramfs_create(struct device_d *dev, const char *pathname,
+ mode_t mode, const char *symlink)
{
struct ramfs_priv *priv = dev->priv;
struct ramfs_inode *node;
char *file;
+ char *__symlink = NULL;
node = rlookup_parent(priv, pathname, &file);
- if (node) {
- node_insert(node, file, mode);
- return 0;
+ if (!node)
+ return -ENOENT;
+
+ if (symlink) {
+ __symlink = strdup(symlink);
+ if (!__symlink)
+ return -ENOMEM;
}
- return -ENOENT;
+
+ node = node_insert(node, file, mode);
+ if (!node) {
+ free(__symlink);
+ return -ENOMEM;
+ }
+
+ node->symlink = __symlink;
+
+ return 0;
+}
+
+static int ramfs_create(struct device_d *dev, const char *pathname, mode_t mode)
+{
+ return __ramfs_create(dev, pathname, mode, NULL);
}
static int ramfs_unlink(struct device_d *dev, const char *pathname)
@@ -532,12 +554,37 @@ static int ramfs_stat(struct device_d *dev, const char *filename, struct stat *s
if (!node)
return -ENOENT;
- s->st_size = node->size;
+ s->st_size = node->symlink ? strlen(node->symlink) : node->size;
s->st_mode = node->mode;
return 0;
}
+static int ramfs_symlink(struct device_d *dev, const char *pathname,
+ const char *newpath)
+{
+ mode_t mode = S_IFLNK | S_IRWXU | S_IRWXG | S_IRWXO;
+
+ return __ramfs_create(dev, newpath, mode, pathname);
+}
+
+static int ramfs_readlink(struct device_d *dev, const char *pathname,
+ char *buf, size_t bufsiz)
+{
+ struct ramfs_priv *priv = dev->priv;
+ struct ramfs_inode *node = rlookup(priv, pathname);
+ int len;
+
+ if (!node || !node->symlink)
+ return -ENOENT;
+
+ len = min(bufsiz, strlen(node->symlink));
+
+ memcpy(buf, node->symlink, len);
+
+ return 0;
+}
+
static int ramfs_probe(struct device_d *dev)
{
struct ramfs_inode *n;
@@ -584,6 +631,8 @@ static struct fs_driver_d ramfs_driver = {
.readdir = ramfs_readdir,
.closedir = ramfs_closedir,
.stat = ramfs_stat,
+ .symlink = ramfs_symlink,
+ .readlink = ramfs_readlink,
.flags = FS_DRIVER_NO_DEV,
.drv = {
.probe = ramfs_probe,
--
1.7.10.4
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next prev parent reply other threads:[~2012-09-03 10:08 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-03 10:04 [PATCH 00/18 v3] fs: " Jean-Christophe PLAGNIOL-VILLARD
2012-09-03 10:08 ` [PATCH 01/18] fs: add " Jean-Christophe PLAGNIOL-VILLARD
2012-09-03 10:08 ` [PATCH 02/18] fs: rename stat to lstat as we implement lstat Jean-Christophe PLAGNIOL-VILLARD
2012-09-03 10:08 ` [PATCH 03/18] fs: add symlink support Jean-Christophe PLAGNIOL-VILLARD
2012-09-03 10:08 ` [PATCH 04/18] fs: implement stat Jean-Christophe PLAGNIOL-VILLARD
2012-09-03 10:08 ` [PATCH 05/18] fs: open: add symlink support Jean-Christophe PLAGNIOL-VILLARD
2012-09-03 10:08 ` [PATCH 06/18] fs: introduce get_mounted_path to get the path where a file is mounted Jean-Christophe PLAGNIOL-VILLARD
2012-09-03 10:08 ` Jean-Christophe PLAGNIOL-VILLARD [this message]
2012-09-03 10:08 ` [PATCH 08/18] nfs: add readlink support Jean-Christophe PLAGNIOL-VILLARD
2012-09-03 10:08 ` [PATCH 09/18] test: add -L support to test if it's a symbolic link Jean-Christophe PLAGNIOL-VILLARD
2012-09-03 10:08 ` [PATCH 10/18] command: add readlink support Jean-Christophe PLAGNIOL-VILLARD
2012-09-03 10:08 ` [PATCH 11/18] command: add ln support Jean-Christophe PLAGNIOL-VILLARD
2012-09-03 10:08 ` [PATCH 12/18] ls: add symlink support to -l Jean-Christophe PLAGNIOL-VILLARD
2012-09-03 10:08 ` [PATCH 13/18] dirname: add -V option to return only path related to the mountpoint Jean-Christophe PLAGNIOL-VILLARD
2012-09-03 10:08 ` [PATCH 14/18] recursive_action: add ACTION_FOLLOWLINKS support Jean-Christophe PLAGNIOL-VILLARD
2012-09-03 10:08 ` [PATCH 15/18] envfs: introduce version major and minor Jean-Christophe PLAGNIOL-VILLARD
2012-09-03 10:08 ` [PATCH 16/18] envfs: add support of variable inode size Jean-Christophe PLAGNIOL-VILLARD
2012-09-03 10:08 ` [PATCH 17/18] envfs: add support of symlink Jean-Christophe PLAGNIOL-VILLARD
2012-09-03 10:08 ` [PATCH 18/18] defautenv: " Jean-Christophe PLAGNIOL-VILLARD
2012-09-03 13:04 ` [PATCH 00/18 v3] fs: add symlink and readlink support Sascha Hauer
2012-09-03 14:47 ` Jean-Christophe PLAGNIOL-VILLARD
-- strict thread matches above, loose matches on Subject: below --
2012-09-01 12:35 [PATCH 00/18 v2] " Jean-Christophe PLAGNIOL-VILLARD
2012-09-01 12:37 ` [PATCH 01/18] fs: add " Jean-Christophe PLAGNIOL-VILLARD
2012-09-01 12:37 ` [PATCH 07/18] ramfs: add symlink and " Jean-Christophe PLAGNIOL-VILLARD
2012-08-24 4:46 [PATCH 00/18] fs: " Jean-Christophe PLAGNIOL-VILLARD
2012-08-24 4:50 ` [PATCH 01/18] fs: add " Jean-Christophe PLAGNIOL-VILLARD
2012-08-24 4:50 ` [PATCH 07/18] ramfs: add symlink and " Jean-Christophe PLAGNIOL-VILLARD
2012-08-27 13:59 ` Sascha Hauer
2012-08-29 5:21 ` Jean-Christophe PLAGNIOL-VILLARD
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