From 2af17490a08c29b033942da42d27b5bda076ad05 Mon Sep 17 00:00:00 2001
From: Thomas Schmitt <scdbackup@gmx.net>
Date: Tue, 26 Apr 2022 12:03:53 +0200
Subject: [PATCH] Bug fix: The lseek methods of IsoFileSource for local
 filesystem and loaded ISO returned libisofs error codes as positive off_t
 numbers

---
 libisofs/fs_image.c | 10 +++++-----
 libisofs/fs_local.c | 12 ++++++------
 2 files changed, 11 insertions(+), 11 deletions(-)

diff --git a/libisofs/fs_image.c b/libisofs/fs_image.c
index 6a40e06..293a7c9 100644
--- a/libisofs/fs_image.c
+++ b/libisofs/fs_image.c
@@ -961,18 +961,18 @@ off_t ifs_lseek(IsoFileSource *src, off_t offset, int flag)
     ImageFileSourceData *data;
 
     if (src == NULL) {
-        return (off_t)ISO_NULL_POINTER;
+        return (off_t)((int) ISO_NULL_POINTER);
     }
     if (offset < (off_t)0) {
-        return (off_t)ISO_WRONG_ARG_VALUE;
+        return (off_t)((int) ISO_WRONG_ARG_VALUE);
     }
 
     data = src->data;
 
     if (!data->opened) {
-        return (off_t)ISO_FILE_NOT_OPENED;
+        return (off_t)((int) ISO_FILE_NOT_OPENED);
     } else if (data->opened != 1) {
-        return (off_t)ISO_FILE_IS_DIR;
+        return (off_t)((int) ISO_FILE_IS_DIR);
     }
 
     switch (flag) {
@@ -987,7 +987,7 @@ off_t ifs_lseek(IsoFileSource *src, off_t offset, int flag)
         data->data.offset = data->info.st_size + offset;
         break;
     default:
-        return (off_t)ISO_WRONG_ARG_VALUE;
+        return (off_t)((int) ISO_WRONG_ARG_VALUE);
     }
 
     /*
diff --git a/libisofs/fs_local.c b/libisofs/fs_local.c
index 68462d4..094b4cb 100644
--- a/libisofs/fs_local.c
+++ b/libisofs/fs_local.c
@@ -337,7 +337,7 @@ off_t lfs_lseek(IsoFileSource *src, off_t offset, int flag)
     int whence;
 
     if (src == NULL) {
-        return (off_t)ISO_NULL_POINTER;
+        return (off_t)((int) ISO_NULL_POINTER);
     }
     switch (flag) {
     case 0: 
@@ -347,7 +347,7 @@ off_t lfs_lseek(IsoFileSource *src, off_t offset, int flag)
     case 2: 
         whence = SEEK_END; break;
     default: 
-        return (off_t)ISO_WRONG_ARG_VALUE;
+        return (off_t)((int) ISO_WRONG_ARG_VALUE);
     }
 
     data = src->data;
@@ -360,19 +360,19 @@ off_t lfs_lseek(IsoFileSource *src, off_t offset, int flag)
                 /* error on read */
                 switch (errno) {
                 case ESPIPE:
-                    ret = (off_t)ISO_FILE_ERROR;
+                    ret = (off_t)((int) ISO_FILE_ERROR);
                     break;
                 default:
-                    ret = (off_t)ISO_ERROR;
+                    ret = (off_t)((int) ISO_ERROR);
                     break;
                 }
             }
             return ret;
         }
     case 2: /* directory */
-        return (off_t)ISO_FILE_IS_DIR;
+        return (off_t)((int) ISO_FILE_IS_DIR);
     default:
-        return (off_t)ISO_FILE_NOT_OPENED;
+        return (off_t)((int) ISO_FILE_NOT_OPENED);
     }
 }