1*41fbaed0Stron /* $NetBSD: sane_socketpair.c,v 1.1.1.1 2009/06/23 10:09:00 tron Exp $ */
2*41fbaed0Stron
3*41fbaed0Stron /*++
4*41fbaed0Stron /* NAME
5*41fbaed0Stron /* sane_socketpair 3
6*41fbaed0Stron /* SUMMARY
7*41fbaed0Stron /* sanitize socketpair() error returns
8*41fbaed0Stron /* SYNOPSIS
9*41fbaed0Stron /* #include <sane_socketpair.h>
10*41fbaed0Stron /*
11*41fbaed0Stron /* int sane_socketpair(domain, type, protocol, result)
12*41fbaed0Stron /* int domain;
13*41fbaed0Stron /* int type;
14*41fbaed0Stron /* int protocol;
15*41fbaed0Stron /* int *result;
16*41fbaed0Stron /* DESCRIPTION
17*41fbaed0Stron /* sane_socketpair() implements the socketpair(2) socket call, and
18*41fbaed0Stron /* skips over silly error results such as EINTR.
19*41fbaed0Stron /* BUGS
20*41fbaed0Stron /* Bizarre systems may have other harmless error results. Such
21*41fbaed0Stron /* systems encourage programmers to ignore error results, and
22*41fbaed0Stron /* penalize programmers who code defensively.
23*41fbaed0Stron /* LICENSE
24*41fbaed0Stron /* .ad
25*41fbaed0Stron /* .fi
26*41fbaed0Stron /* The Secure Mailer license must be distributed with this software.
27*41fbaed0Stron /* AUTHOR(S)
28*41fbaed0Stron /* Wietse Venema
29*41fbaed0Stron /* IBM T.J. Watson Research
30*41fbaed0Stron /* P.O. Box 704
31*41fbaed0Stron /* Yorktown Heights, NY 10598, USA
32*41fbaed0Stron /*--*/
33*41fbaed0Stron
34*41fbaed0Stron /* System library. */
35*41fbaed0Stron
36*41fbaed0Stron #include "sys_defs.h"
37*41fbaed0Stron #include <sys/socket.h>
38*41fbaed0Stron #include <unistd.h>
39*41fbaed0Stron #include <errno.h>
40*41fbaed0Stron
41*41fbaed0Stron /* Utility library. */
42*41fbaed0Stron
43*41fbaed0Stron #include "msg.h"
44*41fbaed0Stron #include "sane_socketpair.h"
45*41fbaed0Stron
46*41fbaed0Stron /* sane_socketpair - sanitize socketpair() error returns */
47*41fbaed0Stron
sane_socketpair(int domain,int type,int protocol,int * result)48*41fbaed0Stron int sane_socketpair(int domain, int type, int protocol, int *result)
49*41fbaed0Stron {
50*41fbaed0Stron static int socketpair_ok_errors[] = {
51*41fbaed0Stron EINTR,
52*41fbaed0Stron 0,
53*41fbaed0Stron };
54*41fbaed0Stron int count;
55*41fbaed0Stron int err;
56*41fbaed0Stron int ret;
57*41fbaed0Stron
58*41fbaed0Stron /*
59*41fbaed0Stron * Solaris socketpair() can fail with EINTR.
60*41fbaed0Stron */
61*41fbaed0Stron while ((ret = socketpair(domain, type, protocol, result)) < 0) {
62*41fbaed0Stron for (count = 0; /* void */ ; count++) {
63*41fbaed0Stron if ((err = socketpair_ok_errors[count]) == 0)
64*41fbaed0Stron return (ret);
65*41fbaed0Stron if (errno == err) {
66*41fbaed0Stron msg_warn("socketpair: %m (trying again)");
67*41fbaed0Stron sleep(1);
68*41fbaed0Stron break;
69*41fbaed0Stron }
70*41fbaed0Stron }
71*41fbaed0Stron }
72*41fbaed0Stron return (ret);
73*41fbaed0Stron }
74