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Red Hat Bugzilla – Attachment 409106 Details for
Bug 585843
lsof does not spot files open by a thread which does not share its father's fd table
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Reproducer
clonenofd.c (text/x-csrc), 842 bytes, created by
Jerome Marchand
on 2010-04-26 08:30:09 UTC
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Description:
Reproducer
Filename:
MIME Type:
Creator:
Jerome Marchand
Created:
2010-04-26 08:30:09 UTC
Size:
842 bytes
patch
obsolete
>#include <stdio.h> >#include <unistd.h> >#include <stdlib.h> >#include <signal.h> >#include <linux/unistd.h> >#define _GNU_SOURCE >#include <sched.h> > > >#define NAMELEN 32 >#define STACKSZ 64*1024 >#define OFFSET 64 > >int opentmpfile(char *fname) { > sprintf(fname, "/tmp/foo.XXXXXX"); > return mkstemp(fname); >} > > >int thread_function (void *arg) { > int fd; > char fname[NAMELEN]; > > fd = opentmpfile(fname); > lseek(fd, OFFSET, SEEK_SET); > sleep(100); > unlink(fname); > > return 0; >} > >int main () { > int pid, tid; > char *stack; > > pid = getpid(); > printf("I'm PID %i\n", pid); > > stack = malloc(STACKSZ); > tid = clone(&thread_function, stack + STACKSZ, > SIGCHLD | CLONE_THREAD | CLONE_SIGHAND | CLONE_VM, NULL); > if(tid == -1) > perror("clone failed"); > printf("tid = %i\n", tid); > > sleep(101); > syscall(__NR_tgkill, pid, tid, SIGKILL); > > return 0; >} >
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