From Bugzilla Helper:
User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)

Description of problem:
When fnctl() is blocked trying to set a lock on a file, it does not get 
interrupted when the process receives a signal:

     signal (SIGALRM, alarm_handler);
     flk.l_type = F_WRLCK;
     alarm (3);
     rc = fcntl (fd, F_SETLKW, &flk);

After three seconds, the signal handler is called, but fcntl continues to 
block until it eventually manages to lock the file.

The fcntl() manpage says:

F_SETLKW
   As  for  F_SETLK, but if a conflicting lock is held on the file,
   then wait for that lock to be released.  If a signal  is  caught
   while  waiting, then the call is interrupted and (after the sig-
   nal handler has returned) returns immediately (with return value
   -1 and errno set to EINTR).

I may be misinterpreting the manpage (in which case I apologize), but I've 
seen the expected behavior on HP-UX, Solaris & AIX.


Version-Release number of selected component (if applicable):
glibc-2.3.2-27.9