/**
* ReadLink event triggered by FUSE.
*
* @param pid PID of the triggering process.
* @param iotime IO time of the operation.
* @param path Path indicating target file.
*/
public void readlink(int pid, int iotime, String path) {
checkProgramTree(Integer.toString(pid));
path = sanitizePath(path);
// Create the file artifact and populate the annotations with file information.
long now = System.currentTimeMillis();
File linkFile = createLinkVertex(path);
putVertex(linkFile);
Used edge = new Used((Program) localCache.get(Integer.toString(pid)), linkFile);
edge.addAnnotation("endtime", Long.toString(now));
edge.addAnnotation("operation", "readlink");
putEdge(edge);
// If the given path represents a link, then perform the same operation on the
// artifact to which the link points.
if (links.containsKey(path)) {
read(pid, iotime, links.get(path), 0);
}
}
/**
* Read event triggered by FUSE.
*
* @param pid PID of the triggering process.
* @param iotime IO time of the operation.
* @param path Path indicating target file.
* @param link An integer used to indicate whether the target was a link or not.
*/
public void read(int pid, int iotime, String path, int link) {
checkProgramTree(Integer.toString(pid));
path = sanitizePath(path);
long now = System.currentTimeMillis();
// Create file artifact depending on whether this is a link or not.
// Link artifacts are created differently to avoid recursion that may
// cause FUSE to crash.
File fileVertex = (link == 1) ? createLinkVertex(path) : createFileVertex(path);
putVertex(fileVertex);
Used edge = new Used((Program) localCache.get(Integer.toString(pid)), fileVertex);
edge.addAnnotation("iotime", Integer.toString(iotime));
edge.addAnnotation("endtime", Long.toString(now));
putEdge(edge);
// If the given path represents a link, then perform the same operation on the
// artifact to which the link points.
if (link == 1 && links.containsKey(path)) {
read(pid, iotime, links.get(path), 0);
}
}
/**
* Rename event triggered by FUSE.
*
* @param pid PID of the triggering process.
* @param iotime IO time of the operation.
* @param pathfrom The source path.
* @param pathto The destination path.
* @param link An integer used to indicate whether the target was a link or not.
* @param done An intiger used to indicate whether this event was triggered before or after the
* rename operation.
*/
public void rename(int pid, int iotime, String pathfrom, String pathto, int link, int done) {
checkProgramTree(Integer.toString(pid));
pathfrom = sanitizePath(pathfrom);
pathto = sanitizePath(pathto);
long now = System.currentTimeMillis();
// 'done' is used to indicate whether this is a pre-rename or a post-rename
// call. In pre-rename, a Used edge is created from the process to the old
// file. In post-rename, a WasGeneratedBy edge is created from the process
// to the new file and a WasDerivedEdge created between the two file
// artifacts.
if (done == 0) {
// Create file artifact depending on whether this is a link or not.
// Link artifacts are created differently to avoid recursion that may
// cause FUSE to crash.
File fileVertex = (link == 1) ? createLinkVertex(pathfrom) : createFileVertex(pathfrom);
putVertex(fileVertex);
// Put the file artifact in the localCache to be removed on post-rename.
localCache.put(pathfrom, fileVertex);
Used edge = new Used((Program) localCache.get(Integer.toString(pid)), fileVertex);
edge.addAnnotation("endtime", Long.toString(now));
putEdge(edge);
} else {
// Create file artifact depending on whether this is a link or not.
// Link artifacts are created differently to avoid recursion that may
// cause FUSE to crash.
File fileVertex = (link == 1 ? createLinkVertex(pathto) : createFileVertex(pathto));
putVertex(fileVertex);
WasGeneratedBy writeEdge =
new WasGeneratedBy(fileVertex, (Program) localCache.get(Integer.toString(pid)));
writeEdge.addAnnotation("endtime", Long.toString(now));
putEdge(writeEdge);
WasDerivedFrom renameEdge =
new WasDerivedFrom(fileVertex, (File) localCache.remove(pathfrom));
renameEdge.addAnnotation("iotime", Integer.toString(iotime));
renameEdge.addAnnotation("endtime", Long.toString(now));
renameEdge.addAnnotation("operation", "rename");
putEdge(renameEdge);
if (links.containsKey(pathfrom)) {
// If the rename is on a link then update the link name.
String linkedLocation = links.get(pathfrom);
links.remove(pathfrom);
links.put(pathto, linkedLocation);
}
}
}