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provide option to use sudo to read the file

This commit is contained in:
Doug MacEachern 2005-12-08 20:46:09 +00:00
parent d9a2f6f284
commit 142721a52f
1 changed files with 20 additions and 2 deletions
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20
bindings/java/src/net/hyperic/sigar/FileTail.java
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@ -2,11 +2,18 @@ package net.hyperic.sigar;
import java.io.FileReader; import java.io.FileReader;
import java.io.IOException; import java.io.IOException;
import java.io.InputStreamReader;
import java.io.Reader; import java.io.Reader;
import java.util.HashMap; import java.util.HashMap;
public abstract class FileTail extends FileWatcher { public abstract class FileTail extends FileWatcher {
public static final String PROP_USE_SUDO =
"sigar.tail.sudo";
private boolean useSudo =
"true".equals(System.getProperty(PROP_USE_SUDO));
private HashMap offsets = new HashMap(); private HashMap offsets = new HashMap();
public abstract void tail(FileInfo info, Reader reader); public abstract void tail(FileInfo info, Reader reader);
@ -15,13 +22,24 @@ public abstract class FileTail extends FileWatcher {
super(sigar); super(sigar);
} }
public void useSudo(boolean useSudo) {
this.useSudo = useSudo;
}
public void onChange(FileInfo info) { public void onChange(FileInfo info) {
long len = info.size; long len = info.size;
Reader reader = null; Reader reader = null;
String name = info.getName();
try { try {
reader = new FileReader(info.getName()); if (this.useSudo) {
reader =
new InputStreamReader(new SudoFileInputStream(name));
}
else {
reader = new FileReader(name);
}
reader.skip(getOffset(info)); reader.skip(getOffset(info));
tail(info, reader); tail(info, reader);
setOffset(info); setOffset(info);