From 60064dd0412a149fe00cfc4e2f2361c22656db57 Mon Sep 17 00:00:00 2001
From: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
Date: Sat, 7 Sep 2019 20:19:05 +0200
Subject: Remove printing to stderr in libsquashfs with returning error numbers

Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
---
 lib/sqfs/read_table.c | 37 ++++++++++++++++++++++---------------
 1 file changed, 22 insertions(+), 15 deletions(-)

(limited to 'lib/sqfs/read_table.c')

diff --git a/lib/sqfs/read_table.c b/lib/sqfs/read_table.c
index d2664d4..843247e 100644
--- a/lib/sqfs/read_table.c
+++ b/lib/sqfs/read_table.c
@@ -8,27 +8,27 @@
 #include "config.h"
 
 #include "sqfs/meta_reader.h"
-#include "highlevel.h"
+#include "sqfs/error.h"
+#include "sqfs/table.h"
+#include "sqfs/data.h"
 #include "util.h"
 
 #include <endian.h>
 #include <stdlib.h>
-#include <stdio.h>
 
-void *sqfs_read_table(int fd, sqfs_compressor_t *cmp, size_t table_size,
-		      uint64_t location, uint64_t lower_limit,
-		      uint64_t upper_limit)
+int sqfs_read_table(int fd, sqfs_compressor_t *cmp, size_t table_size,
+		    uint64_t location, uint64_t lower_limit,
+		    uint64_t upper_limit, void **out)
 {
 	size_t diff, block_count, blk_idx = 0;
 	uint64_t start, *locations;
 	sqfs_meta_reader_t *m;
 	void *data, *ptr;
+	int err;
 
 	data = malloc(table_size);
-	if (data == NULL) {
-		perror("reading table");
-		return NULL;
-	}
+	if (data == NULL)
+		return SQFS_ERROR_ALLOC;
 
 	/* restore list from image */
 	block_count = table_size / SQFS_META_BLOCK_SIZE;
@@ -39,33 +39,38 @@ void *sqfs_read_table(int fd, sqfs_compressor_t *cmp, size_t table_size,
 	locations = alloc_array(sizeof(uint64_t), block_count);
 
 	if (locations == NULL) {
-		perror("allocation table location list");
+		err = SQFS_ERROR_ALLOC;
 		goto fail_data;
 	}
 
 	if (read_data_at("reading table locations", location,
 			 fd, locations, sizeof(uint64_t) * block_count)) {
+		err = SQFS_ERROR_IO;
 		goto fail_idx;
 	}
 
 	/* Read the actual data */
 	m = sqfs_meta_reader_create(fd, cmp, lower_limit, upper_limit);
-	if (m == NULL)
+	if (m == NULL) {
+		err = SQFS_ERROR_ALLOC;
 		goto fail_idx;
+	}
 
 	ptr = data;
 
 	while (table_size > 0) {
 		start = le64toh(locations[blk_idx++]);
 
-		if (sqfs_meta_reader_seek(m, start, 0))
+		err = sqfs_meta_reader_seek(m, start, 0);
+		if (err)
 			goto fail;
 
 		diff = SQFS_META_BLOCK_SIZE;
 		if (diff > table_size)
 			diff = table_size;
 
-		if (sqfs_meta_reader_read(m, ptr, diff))
+		err = sqfs_meta_reader_read(m, ptr, diff);
+		if (err)
 			goto fail;
 
 		ptr = (char *)ptr + diff;
@@ -74,12 +79,14 @@ void *sqfs_read_table(int fd, sqfs_compressor_t *cmp, size_t table_size,
 
 	sqfs_meta_reader_destroy(m);
 	free(locations);
-	return data;
+	*out = data;
+	return 0;
 fail:
 	sqfs_meta_reader_destroy(m);
 fail_idx:
 	free(locations);
 fail_data:
 	free(data);
-	return NULL;
+	*out = NULL;
+	return err;
 }
-- 
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