[Bug 341239] Re: kill(2) succeeds when no process corresponds to the given PID

[Glyph Lefkowitz]

In case anyone still doubts that this is a kernel (or libc) issue, and
thinks it's a Python issue, here's a similar program in C.  Note that
this dies even though we are killing an internal thread ID and not the
process's PID.


#include <pthread.h>
#include <stdio.h>
#include <sys/types.h>
#include <dirent.h>

#define REASONABLE 1024

void* my_thread (void *threadid) {
    printf("thread started\n");
    sleep(600000);
    pthread_exit(NULL);
}

int main(int argc, char** argv) {
    pthread_t thread;
    long t;
    int rc;
    char taskdir[REASONABLE];
    char mypid[REASONABLE];
    snprintf(mypid, REASONABLE, "%ld", (long) getpid());
    rc = pthread_create(&thread, NULL, my_thread, (void *)t);
    printf("main pid %ld\n", (long) getpid());
    snprintf(taskdir, REASONABLE, "/proc/%s/task", mypid);
    DIR* taskdirptr = opendir(taskdir);
    struct dirent* ent = NULL;
    pid_t threadpid;
    char* dname;
    while (NULL != (ent = readdir(taskdirptr))) {
        if (0 == strcmp(ent->d_name, mypid) || 
            0 == strcmp(ent->d_name, ".") ||
            0 == strcmp(ent->d_name, "..")) {
            continue;
        }
        break;
    }
    dname = ent->d_name;
    threadpid = (pthread_t) atoi(dname);
    printf("Killing %ld\n", (long) threadpid);
    kill(threadpid, 9);
    printf("OK, test passed\n");
}


** Also affects: linux
   Importance: Undecided
       Status: New

-- 
kill(2) succeeds when no process corresponds to the given PID
https://bugs.launchpad.net/bugs/341239
You received this bug notification because you are a member of Kernel
Bugs, which is subscribed to Linux.