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don't complain if packet radio interface doesn't support fseek().

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gardners 2013-02-15 04:02:19 +10:30 committed by Jeremy Lakeman
parent f2025cd601
commit a42c685715
1 changed files with 8 additions and 4 deletions
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12
overlay_interface.c
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@ -751,10 +751,14 @@ overlay_broadcast_ensemble(overlay_interface *interface,
only purpose is to find out the offset to print in the DEBUG statement. It is vulnerable only purpose is to find out the offset to print in the DEBUG statement. It is vulnerable
to a race condition with other processes appending to the same file. */ to a race condition with other processes appending to the same file. */
off_t fsize = lseek(interface->alarm.poll.fd, (off_t) 0, SEEK_END); off_t fsize = lseek(interface->alarm.poll.fd, (off_t) 0, SEEK_END);
if (fsize == -1) /* Don't complain if the seek fails because we are writing to a pipe or device that does
return WHY_perror("lseek"); not support seeking. */
if (config.debug.overlayinterfaces) if (errno!=ESPIPE) {
DEBUGF("Write to interface %s at offset=%d", interface->name, fsize); if (fsize == -1)
return WHY_perror("lseek");
if (config.debug.overlayinterfaces)
DEBUGF("Write to interface %s at offset=%d", interface->name, fsize);
}
ssize_t nwrite = write(interface->alarm.poll.fd, &packet, sizeof(packet)); ssize_t nwrite = write(interface->alarm.poll.fd, &packet, sizeof(packet));
if (nwrite == -1) if (nwrite == -1)
return WHY_perror("write"); return WHY_perror("write");