X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=src%2Fdata%2Fsys-file-reader.c;h=b855b45566a179951cfde9315245bf90ee44dd4a;hb=e1147725f1dc67c2efa786df641d820e41cac5cf;hp=8718a5f940ba9d96acca418c4b2fbbeb787a9048;hpb=87798cfc4b530dc7dfdefef77e632a22ee8a4866;p=pspp

diff --git a/src/data/sys-file-reader.c b/src/data/sys-file-reader.c
index 8718a5f940..b855b45566 100644
--- a/src/data/sys-file-reader.c
+++ b/src/data/sys-file-reader.c
@@ -921,9 +921,8 @@ sys_file_casereader_destroy (struct casereader *reader UNUSED, void *r_)
   sfm_close (&r->any_reader);
 }
 
-/* Returns 1 if FILE is an SPSS system file,
-   0 if it is not,
-   otherwise a negative errno value. */
+/* Detects whether FILE is an SPSS system file.  Returns 1 if so, 0 if not, and
+   a negative errno value if there is an error reading FILE. */
 static int
 sfm_detect (FILE *file)
 {
@@ -932,7 +931,7 @@ sfm_detect (FILE *file)
   if (fseek (file, 0, SEEK_SET) != 0)
     return -errno;
   if (fread (magic, 4, 1, file) != 1)
-    return feof (file) ? 0 : -errno;
+    return ferror (file) ? -errno : 0;
   magic[4] = '\0';
 
   return (!strcmp (ASCII_MAGIC, magic)