skalibs

Mirror/fork of https://skarnet.org/software/skalibs/
git clone https://ccx.te2000.cz/git/skalibs
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ipc_timed_send.c (802B)

      1 /* ISC license. */
      2 
      3 #include <skalibs/nonposix.h>
      4 
      5 #include <sys/socket.h>
      6 #include <errno.h>
      7 
      8 #include <skalibs/error.h>
      9 #include <skalibs/iopause.h>
     10 #include <skalibs/unix-timed.h>
     11 #include <skalibs/posixishard.h>
     12 
     13 int ipc_timed_send (int fd, char const *s, size_t len, tain const *deadline, tain *stamp)
     14 {
     15   iopause_fd x = { .fd = fd, .events = IOPAUSE_WRITE, .revents = 0 } ;
     16   for (;;)
     17   {
     18     int r = iopause_stamp(&x, 1, deadline, stamp) ;
     19     if (r < 0) return 0 ;
     20     else if (!r) return (errno = ETIMEDOUT, 0) ;
     21     else if (x.revents & IOPAUSE_WRITE)
     22     {
     23       if (send(fd, s, len, MSG_NOSIGNAL) == (ssize_t)len) break ;
     24       if (!error_isagain(errno)) return 0 ;
     25     }
     26     else if (x.revents & IOPAUSE_EXCEPT) return (send(fd, s, len, MSG_NOSIGNAL) == (ssize_t)len) ;
     27   }
     28   return 1 ;
     29 }