[PATCH 15/40] cat: Update command to use fs_load_alloc()

[Simon Glass]

Use this new function since it implements the required functionality and
reduces duplicated code.

Signed-off-by: Simon Glass <sjg at chromium.org>
---

 cmd/cat.c | 47 +++++++++++++++++------------------------------
 1 file changed, 17 insertions(+), 30 deletions(-)

diff --git a/cmd/cat.c b/cmd/cat.c
index 1273a26b1457..b059080193d4 100644
--- a/cmd/cat.c
+++ b/cmd/cat.c
@@ -17,8 +17,8 @@ static int do_cat(struct cmd_tbl *cmdtp, int flag, int argc,
 	char *dev;
 	char *file;
 	char *buffer;
-	phys_addr_t addr;
-	loff_t file_size;
+	ulong file_size;
+	int ret;
 
 	if (argc < 4)
 		return CMD_RET_USAGE;
@@ -27,40 +27,27 @@ static int do_cat(struct cmd_tbl *cmdtp, int flag, int argc,
 	dev = argv[2];
 	file = argv[3];
 
+	ret = fs_load_alloc(ifname, dev, file, 0, 0, (void **)&buffer,
+			    &file_size);
+
 	// check file exists
-	if (fs_set_blk_dev(ifname, dev, FS_TYPE_ANY))
+	switch (ret) {
+	case 0:
+		break;
+	case -ENOMEDIUM:
 		return CMD_RET_FAILURE;
-
-	if (!fs_exists(file)) {
+	case -ENOENT:
 		log_err("File does not exist: ifname=%s dev=%s file=%s\n", ifname, dev, file);
 		return CMD_RET_FAILURE;
-	}
-
-	// get file size
-	if (fs_set_blk_dev(ifname, dev, FS_TYPE_ANY))
+	case -E2BIG:
+		log_err("File is too large: ifname=%s dev=%s file=%s\n", ifname, dev, file);
 		return CMD_RET_FAILURE;
-
-	if (fs_size(file, &file_size)) {
-		log_err("Cannot read file size: ifname=%s dev=%s file=%s\n", ifname, dev, file);
+	case -ENOMEM:
+		log_err("Not enough memory: ifname=%s dev=%s file=%s\n", ifname, dev, file);
 		return CMD_RET_FAILURE;
-	}
-
-	// allocate memory for file content
-	buffer = calloc(sizeof(char), file_size + 1);
-	if (!buffer) {
-		log_err("Out of memory\n");
-		return CMD_RET_FAILURE;
-	}
-
-	// map pointer to system memory
-	addr = map_to_sysmem(buffer);
-
-	// read file to memory
-	if (fs_set_blk_dev(ifname, dev, FS_TYPE_ANY))
-		return CMD_RET_FAILURE;
-
-	if (fs_read(file, addr, 0, 0, &file_size)) {
-		log_err("Cannot read file: ifname=%s dev=%s file=%s\n", ifname, dev, file);
+	default:
+	case -EIO:
+		log_err("File-read failed: ifname=%s dev=%s file=%s\n", ifname, dev, file);
 		return CMD_RET_FAILURE;
 	}
 
-- 
2.41.0.rc0.172.g3f132b7071-goog