lock.c - Testing fcntl from c writen by nixeagle

lock.c

#include <sys/types.h>  
#include <unistd.h>      
#include <fcntl.h>
#include <stdio.h>

int main() {
  int fd;
  struct flock lock, savelock;

  printf("F_GETLK: %d\n", F_GETLK);
  printf("F_WRLCK: %d\n", F_WRLCK);
  printf("F_RDLCK: %d\n", F_RDLCK);
  printf("F_UNLCK: %d\n", F_UNLCK);
  printf("SEEK_SET: %d\n", SEEK_SET);
  printf("SEEK_CUR: %d\n", SEEK_CUR);
  printf("SEEK_END: %d\n", SEEK_END);

  fd = open("/home/noi/.mozilla/firefox/b51cfon3.Unnamed Profile 1/.parentlock", O_RDWR);
  printf("fd = %d\n", fd);
  
  lock.l_type = F_WRLCK;
  lock.l_start = 0;
  lock.l_whence = SEEK_SET;
  lock.l_len = 0;

  savelock = lock;

  int code = fcntl(fd, F_GETLK, &lock);

  printf("fcntl return codeee: %d\n", code);
  printf("lock.l_pid: %d\n", lock.l_pid);
  printf("lock.l_type: %d\n", lock.l_type);

  exit(0);
}

README

Rev1

• By @nixeagle to test fcntl and open

Rev2

• Made public

Rev3

• My version to dump constant values for use with fcntl