[oi-dev] weird flock problem

[Alexander Pyhalov]

On 11/13/17 11:42 AM, Carsten Grzemba wrote:
> I ran in a problem with error message on openindiana:
> 
> fcntl: Invalid argument
> 
> I wrot short test program:
> 
> #include <sys/file.h>
> #include <stdio.h>
> #include <stdlib.h>
> #include <fcntl.h>
> 
> 
> int main() {
>   struct flock64 l;
>   FILE *fp;
> 
>   l.l_whence = SEEK_SET;
>   l.l_start = 0;
>   l.l_len = 0;
>   l.l_sysid = 0;
>   l.l_pid = 0;
> 
>   fp = fopen("flocktest.c", "r");
>   if (fp == NULL) {
>   perror("fopen");
>   exit(1);
>   }
>   l.l_type = F_UNLCK;
>   if (fcntl(fileno(fp), F_FLOCK, &l) != 0) {
>   perror("fcntl");
>   exit(1);
>   }
>   printf("flocktest.c locked\n");
>   return 0;
> }
> 
> This compiles on Openindiana without an error, but if it runs throws the error: Invalid argument (os error 22)
> 

Works for me.

$ ./flocktest
flocktest.c locked

Running illumos-cbe94e1756  (November, 3rd).
-- 
Best regards,
Alexander Pyhalov,
system administrator of Southern Federal University IT department