Limit it's support to existing file only
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <[email protected]>
---
fs/fs.c | 51 +++++++++++++++++++++++++++++++++++++++++++++++++++
include/fs.h | 3 +++
2 files changed, 54 insertions(+)
diff --git a/fs/fs.c b/fs/fs.c
index 323b6c2..f46c606 100644
--- a/fs/fs.c
+++ b/fs/fs.c
@@ -927,6 +927,57 @@ out:
}
EXPORT_SYMBOL(readlink);
+int symlink(const char *pathname, const char *newpath)
+{
+ struct fs_driver_d *fsdrv;
+ struct fs_device_d *fsdev;
+ char *p;
+ char *freep = normalise_path(pathname);
+ int ret;
+ struct stat s;
+
+ if (!freep)
+ return -ENOMEM;
+
+ if (!stat(freep, &s) && S_ISDIR(s.st_mode)) {
+ ret = -ENOSYS;
+ goto out;
+ }
+
+ free(freep);
+ freep = p = normalise_path(newpath);
+
+ if (!p)
+ return -ENOMEM;
+
+ ret = lstat(p, &s);
+ if (!ret) {
+ ret = -EEXIST;
+ goto out;
+ }
+
+ fsdev = get_fs_device_and_root_path(&p);
+ if (!fsdev) {
+ ret = -ENODEV;
+ goto out;
+ }
+ fsdrv = fsdev->driver;
+
+ if (fsdrv->symlink) {
+ ret = fsdrv->symlink(&fsdev->dev, pathname, p);
+ } else {
+ ret = -EPERM;
+ }
+
+out:
+ free(freep);
+ if (ret)
+ errno = -ret;
+
+ return ret;
+}
+EXPORT_SYMBOL(symlink);
+
static int fs_match(struct device_d *dev, struct driver_d *drv)
{
return strcmp(dev->name, drv->name) ? -1 : 0;
diff --git a/include/fs.h b/include/fs.h
index 98210cf..d96de0e 100644
--- a/include/fs.h
+++ b/include/fs.h
@@ -50,6 +50,8 @@ struct fs_driver_d {
/* Truncate a file to given size */
int (*truncate)(struct device_d *dev, FILE *f, ulong size);
+ int (*symlink)(struct device_d *dev, const char *pathname,
+ const char *newpath);
int (*readlink)(struct device_d *dev, const char *pathname, char *name,
size_t size);
@@ -131,6 +133,7 @@ DIR *opendir(const char *pathname);
struct dirent *readdir(DIR *dir);
int closedir(DIR *dir);
+int symlink(const char *pathname, const char *newpath);
int readlink(const char *path, char *buf, size_t bufsiz);
int mount (const char *device, const char *fsname, const char *path);
--
1.7.10.4
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