[U-Boot] [PATCH 3/5] sandbox: implement fs_exists() and 'sb exists' shell function

[Stephen Warren]

From: Stephen Warren <swarren at nvidia.com>

This hooks into the generic "file exists" support added in the previous
patch, and provides an implementation for the sandbox test environment.

Signed-off-by: Stephen Warren <swarren at nvidia.com>
---
 common/cmd_sandbox.c   | 7 +++++++
 fs/fs.c                | 2 +-
 fs/sandbox/sandboxfs.c | 8 ++++++++
 include/sandboxfs.h    | 1 +
 4 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/common/cmd_sandbox.c b/common/cmd_sandbox.c
index 00982b164dd3..c8d36b747d6a 100644
--- a/common/cmd_sandbox.c
+++ b/common/cmd_sandbox.c
@@ -22,6 +22,12 @@ static int do_sandbox_ls(cmd_tbl_t *cmdtp, int flag, int argc,
 	return do_ls(cmdtp, flag, argc, argv, FS_TYPE_SANDBOX);
 }
 
+static int do_sandbox_exists(cmd_tbl_t *cmdtp, int flag, int argc,
+			     char * const argv[])
+{
+	return do_exists(cmdtp, flag, argc, argv, FS_TYPE_SANDBOX);
+}
+
 static int do_sandbox_save(cmd_tbl_t *cmdtp, int flag, int argc,
 			   char * const argv[])
 {
@@ -88,6 +94,7 @@ static int do_sandbox_info(cmd_tbl_t *cmdtp, int flag, int argc,
 static cmd_tbl_t cmd_sandbox_sub[] = {
 	U_BOOT_CMD_MKENT(load, 7, 0, do_sandbox_load, "", ""),
 	U_BOOT_CMD_MKENT(ls, 3, 0, do_sandbox_ls, "", ""),
+	U_BOOT_CMD_MKENT(exists, 3, 0, do_sandbox_exists, "", ""),
 	U_BOOT_CMD_MKENT(save, 6, 0, do_sandbox_save, "", ""),
 	U_BOOT_CMD_MKENT(bind, 3, 0, do_sandbox_bind, "", ""),
 	U_BOOT_CMD_MKENT(info, 3, 0, do_sandbox_info, "", ""),
diff --git a/fs/fs.c b/fs/fs.c
index f3d9a1c6bc7d..4f344c6d6d72 100644
--- a/fs/fs.c
+++ b/fs/fs.c
@@ -102,7 +102,7 @@ static struct fstype_info fstypes[] = {
 		.probe = sandbox_fs_set_blk_dev,
 		.close = sandbox_fs_close,
 		.ls = sandbox_fs_ls,
-		.exists = fs_exists_unsupported,
+		.exists = sandbox_fs_exists,
 		.read = fs_read_sandbox,
 		.write = fs_write_sandbox,
 	},
diff --git a/fs/sandbox/sandboxfs.c b/fs/sandbox/sandboxfs.c
index dd028da8e32b..7940c93dc6a3 100644
--- a/fs/sandbox/sandboxfs.c
+++ b/fs/sandbox/sandboxfs.c
@@ -72,6 +72,14 @@ int sandbox_fs_ls(const char *dirname)
 	return 0;
 }
 
+int sandbox_fs_exists(const char *filename)
+{
+	ssize_t sz;
+
+	sz = os_get_filesize(filename);
+	return (sz >= 0) ? 0 : -1;
+}
+
 void sandbox_fs_close(void)
 {
 }
diff --git a/include/sandboxfs.h b/include/sandboxfs.h
index 8ea8cb7e2e62..a51ad13044e1 100644
--- a/include/sandboxfs.h
+++ b/include/sandboxfs.h
@@ -25,6 +25,7 @@ long sandbox_fs_read_at(const char *filename, unsigned long pos,
 
 void sandbox_fs_close(void);
 int sandbox_fs_ls(const char *dirname);
+int sandbox_fs_exists(const char *filename);
 int fs_read_sandbox(const char *filename, void *buf, int offset, int len);
 int fs_write_sandbox(const char *filename, void *buf, int offset, int len);
 
-- 
1.8.1.5