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8266610: Method RandomAccessFile#length() returns 0 for block devices on linux.

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Reviewed-by: alanb, bpb
This commit is contained in:
Vyom Tewari 2021-05-10 03:51:04 +00:00
parent 9b76955024
commit 69b96f9a1b
1 changed files with 13 additions and 3 deletions
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16
src/java.base/unix/native/libjava/io_util_md.c
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@ -32,6 +32,8 @@
#if defined(__linux__) || defined(_ALLBSD_SOURCE) || defined(_AIX)
#include <sys/ioctl.h>
#include <linux/fs.h>
#include <sys/stat.h>
#endif
#ifdef MACOSX
@ -245,9 +247,17 @@ handleGetLength(FD fd)
struct stat64 sb;
int result;
RESTARTABLE(fstat64(fd, &sb), result);
if (result == 0) {
return sb.st_size;
} else {
if (result < 0) {
return -1;
}
#ifdef BLKGETSIZE64
if (S_ISBLK(sb.st_mode)) {
uint64_t size;
if(ioctl(fd, BLKGETSIZE64, &size) < 0) {
return -1;
}
return (jlong)size;
}
#endif
return sb.st_size;
}