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fix JVM_Available for when fd is a fifo or socket

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This commit is contained in:
Joel Dice 2010-09-23 08:49:36 -06:00
parent 89f6adc93c
commit b023d147df
1 changed files with 14 additions and 0 deletions
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14
src/classpath-openjdk.cpp
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@ -41,6 +41,7 @@
# include <sys/types.h>
# include <sys/stat.h>
# include <sys/socket.h>
# include <sys/ioctl.h>
# include <fcntl.h>
# include <errno.h>
# include <sched.h>
@ -49,6 +50,7 @@
# define CLOSE close
# define READ read
# define WRITE write
# define FSTAT fstat
# define LSEEK lseek
#endif // not PLATFORM_WINDOWS
@ -2372,6 +2374,18 @@ JVM_Write(jint fd, char* src, jint length)
extern "C" JNIEXPORT jint JNICALL
JVM_Available(jint fd, jlong* result)
{
struct stat buffer;
int n;
if (FSTAT(fd, &buffer) >= 0
and (S_ISCHR(buffer.st_mode)
or S_ISFIFO(buffer.st_mode)
or S_ISSOCK(buffer.st_mode))
and ioctl(fd, FIONREAD, &n) >= 0)
{
*result = n;
return 1;
}
int current = LSEEK(fd, 0, SEEK_CUR);
if (current == -1) return 0;