exit on select return -1 but errno == 0?

[Joe Maimon]

running under gdb, server exits(1) after a bit


Breakpoint 15, main (argc=2, argv=0xbfe26764) at radiusd.c:600
600                             if (errno == EINTR) {
(gdb) p errno
$9 = 0
(gdb) p status
$10 = -1
(gdb)

Debian GNU/Linux
  dpkg -l libc6
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Installed/Config-files/Unpacked/Failed-config/Half-installed
|/ Err?=(none)/Hold/Reinst-required/X=both-problems (Status,Err: 
uppercase=bad)
||/ Name                      Version                   Description
+++-=========================-=========================-==================================================================
ii  libc6                     2.3.5-6                   GNU C Library: 
Shared libraries and Timezone data