skalibs

Mirror/fork of https://skarnet.org/software/skalibs/
git clone https://ccx.te2000.cz/git/skalibs
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tryflock.c (176B)

      1 /* ISC license. */
      2 
      3 #undef _POSIX_C_SOURCE
      4 #undef _XOPEN_SOURCE
      5 
      6 #include <sys/file.h>
      7 #include <fcntl.h>
      8 
      9 int main (void)
     10 {
     11   return flock(0, LOCK_EX | LOCK_UN | LOCK_NB) ;
     12 }