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-rw-r--r--src/util/sane_socketpair.c71
1 files changed, 71 insertions, 0 deletions
diff --git a/src/util/sane_socketpair.c b/src/util/sane_socketpair.c
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+/*++
+/* NAME
+/* sane_socketpair 3
+/* SUMMARY
+/* sanitize socketpair() error returns
+/* SYNOPSIS
+/* #include <sane_socketpair.h>
+/*
+/* int sane_socketpair(domain, type, protocol, result)
+/* int domain;
+/* int type;
+/* int protocol;
+/* int *result;
+/* DESCRIPTION
+/* sane_socketpair() implements the socketpair(2) socket call, and
+/* skips over silly error results such as EINTR.
+/* BUGS
+/* Bizarre systems may have other harmless error results. Such
+/* systems encourage programmers to ignore error results, and
+/* penalize programmers who code defensively.
+/* LICENSE
+/* .ad
+/* .fi
+/* The Secure Mailer license must be distributed with this software.
+/* AUTHOR(S)
+/* Wietse Venema
+/* IBM T.J. Watson Research
+/* P.O. Box 704
+/* Yorktown Heights, NY 10598, USA
+/*--*/
+
+/* System library. */
+
+#include "sys_defs.h"
+#include <sys/socket.h>
+#include <unistd.h>
+#include <errno.h>
+
+/* Utility library. */
+
+#include "msg.h"
+#include "sane_socketpair.h"
+
+/* sane_socketpair - sanitize socketpair() error returns */
+
+int sane_socketpair(int domain, int type, int protocol, int *result)
+{
+ static int socketpair_ok_errors[] = {
+ EINTR,
+ 0,
+ };
+ int count;
+ int err;
+ int ret;
+
+ /*
+ * Solaris socketpair() can fail with EINTR.
+ */
+ while ((ret = socketpair(domain, type, protocol, result)) < 0) {
+ for (count = 0; /* void */ ; count++) {
+ if ((err = socketpair_ok_errors[count]) == 0)
+ return (ret);
+ if (errno == err) {
+ msg_warn("socketpair: %m (trying again)");
+ sleep(1);
+ break;
+ }
+ }
+ }
+ return (ret);
+}