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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);
}
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