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handle UnsatisfiedLinkError in LinuxPOSIX constructor, resolves #187 #188

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merged 1 commit into from
Feb 7, 2024
Merged

handle UnsatisfiedLinkError in LinuxPOSIX constructor, resolves #187 #188

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57 changes: 19 additions & 38 deletions src/main/java/jnr/posix/LinuxPOSIX.java
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Original file line number Diff line number Diff line change
Expand Up @@ -14,24 +14,28 @@
import jnr.constants.platform.Pathconf;

final class LinuxPOSIX extends BaseNativePOSIX implements Linux {
private volatile boolean use_fxstat64 = true;
private volatile boolean use_lxstat64 = true;
private volatile boolean use_xstat64 = true;
private final boolean use_stat64;
private final int statVersion;

LinuxPOSIX(LibCProvider libcProvider, POSIXHandler handler) {
super(libcProvider, handler);

statVersion = getStatVersion();
use_stat64 = statVersion >= 0;
}

private int getStatVersion() {
if (Platform.IS_32_BIT || "sparcv9".equals(Platform.ARCH) || Platform.ARCH.contains("mips64")) {
statVersion = 3;
return 3;
} else {
FileStat stat = allocateStat();

if (((LinuxLibC) libc()).__xstat64(0, "/dev/null", stat) < 0) {
statVersion = 1;
} else {
statVersion = 0;
try {
if (((LinuxLibC) libc()).__xstat64(0, "/dev/null", stat) < 0) {
return 1;
}
return 0;
} catch (UnsatisfiedLinkError ex) {
return -1;
}
}
}
Expand Down Expand Up @@ -85,20 +89,8 @@ private int old_fstat(int fd, FileStat stat) {

@Override
public int fstat(int fd, FileStat stat) {
if (use_fxstat64) {
int ret;
try {
if ((ret = ((LinuxLibC) libc()).__fxstat64(statVersion, fd, stat)) < 0) {
handler.error(Errno.valueOf(errno()), "fstat", Integer.toString(fd));
}

return ret;

} catch (UnsatisfiedLinkError ex) {
use_fxstat64 = false;
return old_fstat(fd, stat);
}

if (use_stat64) {
return ((LinuxLibC) libc()).__fxstat64(statVersion, fd, stat);
} else {
return old_fstat(fd, stat);
}
Expand Down Expand Up @@ -137,13 +129,8 @@ private final int old_lstat(String path, FileStat stat) {

@Override
public int lstat(String path, FileStat stat) {
if (use_lxstat64) {
try {
return ((LinuxLibC) libc()).__lxstat64(statVersion, path, stat);
} catch (UnsatisfiedLinkError ex) {
use_lxstat64 = false;
return old_lstat(path, stat);
}
if (use_stat64) {
return ((LinuxLibC) libc()).__lxstat64(statVersion, path, stat);
} else {
return old_lstat(path, stat);
}
Expand All @@ -169,14 +156,8 @@ private final int old_stat(String path, FileStat stat) {
@Override
public int stat(String path, FileStat stat) {

if (use_xstat64) {
try {
return ((LinuxLibC) libc()).__xstat64(statVersion, path, stat);
} catch (UnsatisfiedLinkError ex) {
use_xstat64 = false;
return old_stat(path, stat);
}

if (use_stat64) {
return ((LinuxLibC) libc()).__xstat64(statVersion, path, stat);
} else {
return old_stat(path, stat);
}
Expand Down
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