Get the full path name from inotify_event

Question

The inotify_event structure is as follows:

struct inotify_event {
int      wd;       /* Watch descriptor */
uint32_t mask;     /* Mask of events */
uint32_t cookie;   /* Unique cookie associating related
                      events (for rename(2)) */
uint32_t len;      /* Size of name field */
char     name[];   /* Optional null-terminated name */

};

The name part stores only the file name (and not the file path). How do we get the full path from the inotify_event structure or do I need to wrap my own structure around it?

Edit: I wait for events for about 2 seconds and then process them at a time. I maintain an event queue. My question is, can I only get the full path to my file from the inotify_event structure?

The number of events per second is large.

Answer 1

There are two options:

• You are watching a file. You passed your name inotify_add_watchand got a clock handle. If you receive an event, you can define the file using the clock descriptor.
  

• . , inotify_add_watch , , watch. inotify_event.name . , .

Answer 2

, , - ( , ). , , , wd .

wd , . , inotify_add_watch (2).

http://www.kernel.org/doc/man-pages/online/pages/man7/inotify.7.html

, ...

Answer 3

, , .

, dir, :/root/dir1 /root/dir 2, , dir1 dir2, .

Inotify , .

Answer 4

( ) , . , . , , , , . , , , . , , , .

Answer 5

The inotify system uses continuous numbers as view descriptors, let's say you want to look at 3 directories, .. /A,../B and ../ C, if you can say, I create a file inside .. / A, then return the clock descriptor from read () there will be 1. if I create a file inside .. / C, the clock descriptor will be 3 and so on. Thus, the association is quite simple, you can create an array with paths and apply inotify_add_watch () to each of them, then if the event has a clock descriptor x, just compose pathsArray [x-1] with event-> name and you have there is a way :)

std::string getPathFromEvent(struct inotify_event *ptr){
    std::stringstream builder ;
    builder<<directories->DetectedDirectories.operator[](ptr->wd-1).string();
    builder<<ptr->name;
    return builder.str();
}