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/* source: xioshutdown.c */
/* Copyright Gerhard Rieger 2001-2009 */
/* Published under the GNU General Public License V.2, see file COPYING */
/* this is the source of the extended shutdown function */
#include "xiosysincludes.h"
#include "xioopen.h"
static pid_t socat_kill_pid; /* here we pass the pid to be killed in sighandler */
static void signal_kill_pid(int dummy) {
Notice("SIGALRM while waiting for w/o child process to die, killing it now");
Kill(socat_kill_pid, SIGTERM);
}
int xioshutdown(xiofile_t *sock, int how) {
int result = 0;
if (sock->tag == XIO_TAG_INVALID) {
Error("xioshutdown(): invalid file descriptor");
errno = EINVAL;
return -1;
}
if (sock->tag == XIO_TAG_DUAL) {
if ((how+1)&1) {
result = xioshutdown((xiofile_t *)sock->dual.stream[0], 0);
}
if ((how+1)&2) {
result |= xioshutdown((xiofile_t *)sock->dual.stream[1], 1);
}
return result;
}
switch (sock->stream.howtoshut) {
char writenull;
case XIOSHUT_NONE:
return 0;
case XIOSHUT_CLOSE:
if (Close(sock->stream.fd) < 0) {
Info2("close(%d): %s",
sock->stream.fd, strerror(errno));
}
return 0;
case XIOSHUT_DOWN:
if ((result = Shutdown(sock->stream.fd, how)) < 0) {
Info3("shutdown(%d, %d): %s",
sock->stream.fd, how, strerror(errno));
}
return 0;
#if _WITH_SOCKET
case XIOSHUT_NULL:
/* send an empty packet; only useful on datagram sockets? */
xiowrite(sock, &writenull, 0);
return 0;
#endif /* _WITH_SOCKET */
default: ;
}
if (false) {
;
#if WITH_OPENSSL
} else if ((sock->stream.dtype & XIODATA_MASK) == XIODATA_OPENSSL) {
sycSSL_shutdown (sock->stream.para.openssl.ssl);
/*! what about half/full close? */
#endif /* WITH_OPENSSL */
} else if ((sock->stream.dtype & XIODATA_MASK) == XIODATA_PIPE) {
if ((how+1)&1) {
if (Close(sock->stream.fd) < 0) {
Info2("close(%d): %s",
sock->stream.fd, strerror(errno));
}
}
if ((how+1)&2) {
if (Close(sock->stream.para.bipipe.fdout) < 0) {
Info2("close(%d): %s",
sock->stream.para.bipipe.fdout, strerror(errno));
}
}
} else if ((sock->stream.dtype & XIODATA_MASK) == XIODATA_2PIPE) {
if ((how+1)&1) {
if (Close(sock->stream.fd) < 0) {
Info2("close(%d): %s",
sock->stream.fd, strerror(errno));
}
}
if ((how+1)&2) {
if (Close(sock->stream.para.exec.fdout) < 0) {
Info2("close(%d): %s",
sock->stream.para.exec.fdout, strerror(errno));
}
}
#if _WITH_SOCKET
} else if (sock->stream.howtoend == END_SHUTDOWN) {
if ((result = Shutdown(sock->stream.fd, how)) < 0) {
Info3("shutdown(%d, %d): %s",
sock->stream.fd, how, strerror(errno));
}
} else if (sock->stream.howtoend == END_SHUTDOWN_KILL) {
if ((result = Shutdown(sock->stream.fd, how)) < 0) {
Info3("shutdown(%d, %d): %s",
sock->stream.fd, how, strerror(errno));
}
if ((sock->stream.flags&XIO_ACCMODE) == XIO_WRONLY) {
/* the child process might want to flush some data before terminating
*/
int status = 0;
/* we wait for the child process to die, but to prevent timeout
we raise an alarm after some time.
NOTE: the alarm does not terminate waitpid() on Linux/glibc (BUG?),
therefore we have to do the kill in the signal handler */
Signal(SIGALRM, signal_kill_pid);
socat_kill_pid = sock->stream.para.exec.pid;
#if HAVE_SETITIMER
/*! with next feature release, we get usec resolution and an option */
#else
Alarm(1 /*! sock->stream.para.exec.waitdie */);
#endif /* !HAVE_SETITIMER */
if (Waitpid(sock->stream.para.exec.pid, &status, 0) < 0) {
Warn3("waitpid("F_pid", %p, 0): %s",
sock->stream.para.exec.pid, &status, strerror(errno));
}
Alarm(0);
}
} else if ((sock->stream.dtype & XIODATA_MASK) == XIODATA_RECVFROM) {
if (how >= 1) {
if (Close(sock->stream.fd) < 0) {
Info2("close(%d): %s",
sock->stream.fd, strerror(errno));
}
sock->stream.eof = 2;
sock->stream.fd = -1;
}
#endif /* _WITH_SOCKET */
#if 0
} else {
Error1("xioshutdown(): bad data type specification %d", sock->stream.dtype);
return -1;
#endif
}
#if 0
else if (sock->stream.howtoend == END_CLOSE &&
sock->stream.dtype == DATA_STREAM) {
return result;
}
#if WITH_TERMIOS
if (sock->stream.ttyvalid) {
if (Tcsetattr(sock->stream.fd, 0, &sock->stream.savetty) < 0) {
Warn2("cannot restore terminal settings on fd %d: %s",
sock->stream.fd, strerror(errno));
}
}
#endif /* WITH_TERMIOS */
#endif
return result;
}
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