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Avoid seeking on bad file descriptors

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This commit is contained in:
Kleis Auke Wolthuizen 2020-12-22 11:19:09 +01:00
parent cc8f93a3ff
commit 2eeeedc957
1 changed files with 2 additions and 1 deletions
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3
libvips/iofuncs/source.c
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@ -153,7 +153,8 @@ vips_source_test_features( VipsSource *source )
* vips_source_seek() etc. or we might trigger seek emulation. * vips_source_seek() etc. or we might trigger seek emulation.
*/ */
if( source->data || if( source->data ||
class->seek( source, 0, SEEK_CUR ) != -1 ) { (VIPS_CONNECTION( source )->descriptor != -1 &&
class->seek( source, 0, SEEK_CUR ) != -1) ) {
gint64 length; gint64 length;
VIPS_DEBUG_MSG( " seekable source\n" ); VIPS_DEBUG_MSG( " seekable source\n" );