rosapps/net/ncftp/sio/USendto.c

   1 #include "syshdrs.h"
   2
   3 #if !defined(NO_UNIX_DOMAIN_SOCKETS) && !defined(NO_SIGNALS)
   4
   5 extern volatile Sjmp_buf gNetTimeoutJmp;
   6 extern volatile Sjmp_buf gPipeJmp;
   7
   8 int
   9 USendto(int sfd, const char *const buf, size_t size, int fl, const struct sockaddr_un *const toAddr, int ualen, int tlen)
  10 {
  11         int nwrote, tleft;
  12         vsio_sigproc_t sigalrm, sigpipe;
  13         time_t done, now;
  14
  15         if (SSetjmp(gNetTimeoutJmp) != 0) {
  16                 alarm(0);
  17                 (void) SSignal(SIGALRM, (sio_sigproc_t) sigalrm);
  18                 (void) SSignal(SIGPIPE, (sio_sigproc_t) sigpipe);
  19                 errno = ETIMEDOUT;
  20                 return (kTimeoutErr);
  21         }
  22
  23         if (SSetjmp(gPipeJmp) != 0) {
  24                 alarm(0);
  25                 (void) SSignal(SIGALRM, (sio_sigproc_t) sigalrm);
  26                 (void) SSignal(SIGPIPE, (sio_sigproc_t) sigpipe);
  27                 errno = EPIPE;
  28                 return (kBrokenPipeErr);
  29         }
  30
  31         sigalrm = (vsio_sigproc_t) SSignal(SIGALRM, SIOHandler);
  32         sigpipe = (vsio_sigproc_t) SSignal(SIGPIPE, SIOHandler);
  33
  34         time(&now);
  35         done = now + tlen;
  36         tleft = (int) (done - now);
  37         forever {
  38                 (void) alarm((unsigned int) tleft);
  39                 nwrote = sendto(sfd, buf, size, fl,
  40                         (struct sockaddr *) toAddr, ualen);
  41                 (void) alarm(0);
  42                 if (nwrote >= 0)
  43                         break;
  44                 if (errno != EINTR)
  45                         break;          /* Fatal error. */
  46                 errno = 0;
  47                 time(&now);
  48                 tleft = (int) (done - now);
  49                 if (tleft < 1) {
  50                         nwrote = kTimeoutErr;
  51                         errno = ETIMEDOUT;
  52                         break;
  53                 }
  54         }
  55
  56         (void) SSignal(SIGALRM, (sio_sigproc_t) sigalrm);
  57         (void) SSignal(SIGPIPE, (sio_sigproc_t) sigpipe);
  58
  59         return (nwrote);
  60 }       /* USendto */
  61
  62 #endif
  63