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8313368: (fc) FileChannel.size returns 0 on block special files

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Reviewed-by: vtewari, alanb
This commit is contained in:
Brian Burkhalter 2023-08-02 15:25:59 +00:00
parent c1a3f143bf
commit 4ba81f631f
2 changed files with 11 additions and 5 deletions
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7
src/java.base/unix/native/libnio/ch/UnixFileDispatcherImpl.c
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@ -45,6 +45,11 @@
#define fstatvfs64 fstatvfs
#endif
#if defined(__linux__)
#include <linux/fs.h>
#include <sys/ioctl.h>
#endif
#include "jni.h"
#include "nio.h"
#include "nio_util.h"
@ -169,7 +174,7 @@ Java_sun_nio_ch_UnixFileDispatcherImpl_size0(JNIEnv *env, jobject this, jobject
if (fstat64(fd, &fbuf) < 0)
return handle(env, -1, "Size failed");
#ifdef BLKGETSIZE64
#if defined(__linux__)
if (S_ISBLK(fbuf.st_mode)) {
uint64_t size;
if (ioctl(fd, BLKGETSIZE64, &size) < 0)