diff options
| author | Florian Weimer <fweimer@redhat.com> | 2015-10-17 12:02:37 +0200 |
|---|---|---|
| committer | Florian Weimer <fweimer@redhat.com> | 2015-10-17 12:02:37 +0200 |
| commit | 52fb79d6cdecb89a6f0375091e7c12ed79ae6760 (patch) | |
| tree | e4885bfee90d7fe9f584518d3bc242050c725ef0 /resolv | |
| parent | f546f87c4ffb1642ffc96b8d614c329ed35252c3 (diff) | |
Assume that SOCK_CLOEXEC is available and works
This fixes (harmless) data races when accessing the various
__have_sock_cloexec variables.
Diffstat (limited to 'resolv')
| -rw-r--r-- | resolv/res_send.c | 49 |
1 files changed, 4 insertions, 45 deletions
diff --git a/resolv/res_send.c b/resolv/res_send.c index 5e53cc2df6..6137e4d788 100644 --- a/resolv/res_send.c +++ b/resolv/res_send.c @@ -104,14 +104,6 @@ static const char rcsid[] = "$BINDId: res_send.c,v 8.38 2000/03/30 20:16:51 vixi #define MAXPACKET 65536 #endif - -#ifndef __ASSUME_SOCK_CLOEXEC -static int __have_o_nonblock; -#else -# define __have_o_nonblock 0 -#endif - - /* From ev_streams.c. */ static inline void @@ -927,38 +919,14 @@ reopen (res_state statp, int *terrno, int ns) /* only try IPv6 if IPv6 NS and if not failed before */ if (nsap->sa_family == AF_INET6 && !statp->ipv6_unavail) { - if (__glibc_likely (__have_o_nonblock >= 0)) { - EXT(statp).nssocks[ns] = - socket(PF_INET6, SOCK_DGRAM|SOCK_NONBLOCK, - 0); -#ifndef __ASSUME_SOCK_CLOEXEC - if (__have_o_nonblock == 0) - __have_o_nonblock - = (EXT(statp).nssocks[ns] == -1 - && errno == EINVAL ? -1 : 1); -#endif - } - if (__glibc_unlikely (__have_o_nonblock < 0)) - EXT(statp).nssocks[ns] = - socket(PF_INET6, SOCK_DGRAM, 0); + EXT(statp).nssocks[ns] + = socket(PF_INET6, SOCK_DGRAM|SOCK_NONBLOCK, 0); if (EXT(statp).nssocks[ns] < 0) statp->ipv6_unavail = errno == EAFNOSUPPORT; slen = sizeof (struct sockaddr_in6); } else if (nsap->sa_family == AF_INET) { - if (__glibc_likely (__have_o_nonblock >= 0)) { - EXT(statp).nssocks[ns] - = socket(PF_INET, SOCK_DGRAM|SOCK_NONBLOCK, - 0); -#ifndef __ASSUME_SOCK_CLOEXEC - if (__have_o_nonblock == 0) - __have_o_nonblock - = (EXT(statp).nssocks[ns] == -1 - && errno == EINVAL ? -1 : 1); -#endif - } - if (__glibc_unlikely (__have_o_nonblock < 0)) - EXT(statp).nssocks[ns] - = socket(PF_INET, SOCK_DGRAM, 0); + EXT(statp).nssocks[ns] + = socket(PF_INET, SOCK_DGRAM|SOCK_NONBLOCK, 0); slen = sizeof (struct sockaddr_in); } if (EXT(statp).nssocks[ns] < 0) { @@ -983,15 +951,6 @@ reopen (res_state statp, int *terrno, int ns) __res_iclose(statp, false); return (0); } - if (__glibc_unlikely (__have_o_nonblock < 0)) { - /* Make socket non-blocking. */ - int fl = __fcntl (EXT(statp).nssocks[ns], F_GETFL); - if (fl != -1) - __fcntl (EXT(statp).nssocks[ns], F_SETFL, - fl | O_NONBLOCK); - Dprint(statp->options & RES_DEBUG, - (stdout, ";; new DG socket\n")) - } } return 1; |