UAcceptA.c

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#include "syshdrs.h"
 
#if !defined(NO_UNIX_DOMAIN_SOCKETS) && !defined(NO_SIGNALS)
 
extern volatile Sjmp_buf gNetTimeoutJmp;
extern volatile Sjmp_buf gPipeJmp;
 
int
UAcceptA(int sfd, struct sockaddr_un *const addr, int *ualen, int tlen)
{
    int result;
    vsio_sigproc_t sigalrm, sigpipe;
 
    if (tlen < 0) {
        errno = 0;
        for (;;) {
            *ualen = (int) sizeof(struct sockaddr_un);
            result = accept(sfd, (struct sockaddr *) addr, (int *) ualen);
            if ((result >= 0) || (errno != EINTR))
                return (result);
        }
    }
 
    if (SSetjmp(gNetTimeoutJmp) != 0) {
        alarm(0);
        (void) SSignal(SIGALRM, (sio_sigproc_t) sigalrm);
        (void) SSignal(SIGPIPE, (sio_sigproc_t) sigpipe);
        errno = ETIMEDOUT;
        return (kTimeoutErr);
    }
 
    sigalrm = (vsio_sigproc_t) SSignal(SIGALRM, SIOHandler);
    sigpipe = (vsio_sigproc_t) SSignal(SIGPIPE, SIG_IGN);
    alarm((unsigned int) tlen);
 
    errno = 0;
    do {
        *ualen = (int) sizeof(struct sockaddr_un);
        result = accept(sfd, (struct sockaddr *) addr, (int *) ualen);
    } while ((result < 0) && (errno == EINTR));
 
    alarm(0);
    (void) SSignal(SIGALRM, (sio_sigproc_t) sigalrm);
    (void) SSignal(SIGPIPE, (sio_sigproc_t) sigpipe);
    return (result);
}   /* UAcceptA */
 
#endif