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xio-stdio.c
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xio-stdio.c
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/* source: xio-stdio.c */
/* Copyright Gerhard Rieger 2001-2009 */
/* Published under the GNU General Public License V.2, see file COPYING */
/* this file contains the source for opening addresses stdio type */
#include "xiosysincludes.h"
#include "xioopen.h"
#include "xio-fdnum.h"
#include "xio-stdio.h"
#if WITH_STDIO
static int xioopen_stdio(int argc, const char *argv[], struct opt *opts, int xioflags, xiofile_t *fd, unsigned groups, int dummy1, int dummy2, int dummy3);
static int xioopen_stdfd(int argc, const char *argv[], struct opt *opts, int xioflags, xiofile_t *xfd, unsigned groups, int fd, int dummy2, int dummy3);
/* we specify all option groups that we can imagine for a FD, becasue the
changed parsing mechanism does not allow us to check the type of FD before
applying the options */
static const struct xioaddr_endpoint_desc xioaddr_stdio0 = { XIOADDR_SYS, "stdio", 0, XIOBIT_ALL, GROUP_FD|GROUP_FIFO|GROUP_CHR|GROUP_BLK|GROUP_FILE|GROUP_SOCKET|GROUP_TERMIOS|GROUP_SOCK_UNIX|GROUP_SOCK_IP|GROUP_IPAPP, XIOSHUT_UNSPEC, XIOCLOSE_NONE, xioopen_stdio, 0, 0, 0 HELP(NULL) };
static const struct xioaddr_endpoint_desc xioaddr_stdin0 = { XIOADDR_SYS, "stdin", 0, XIOBIT_RDONLY, GROUP_FD|GROUP_FIFO|GROUP_CHR|GROUP_BLK|GROUP_FILE|GROUP_SOCKET|GROUP_TERMIOS|GROUP_SOCK_UNIX|GROUP_SOCK_IP|GROUP_IPAPP, XIOSHUT_UNSPEC, XIOCLOSE_NONE, xioopen_stdfd, 0, 0, 0 HELP(NULL) };
static const struct xioaddr_endpoint_desc xioaddr_stdout0 = { XIOADDR_SYS, "stdout", 0, XIOBIT_WRONLY, GROUP_FD|GROUP_FIFO|GROUP_CHR|GROUP_BLK|GROUP_FILE|GROUP_SOCKET|GROUP_TERMIOS|GROUP_SOCK_UNIX|GROUP_SOCK_IP|GROUP_IPAPP, XIOSHUT_UNSPEC, XIOCLOSE_NONE, xioopen_stdfd, 1, 0, 0 HELP(NULL) };
static const struct xioaddr_endpoint_desc xioaddr_stderr0 = { XIOADDR_SYS, "stderr", 0, XIOBIT_WRONLY, GROUP_FD|GROUP_FIFO|GROUP_CHR|GROUP_BLK|GROUP_FILE|GROUP_SOCKET|GROUP_TERMIOS|GROUP_SOCK_UNIX|GROUP_SOCK_IP|GROUP_IPAPP, XIOSHUT_UNSPEC, XIOCLOSE_NONE, xioopen_stdfd, 2, 0, 0 HELP(NULL) };
const union xioaddr_desc *xioaddrs_stdio[] = {
(union xioaddr_desc *)&xioaddr_stdio0, NULL };
const union xioaddr_desc *xioaddrs_stdin[] = {
(union xioaddr_desc *)&xioaddr_stdin0, NULL };
const union xioaddr_desc *xioaddrs_stdout[] = {
(union xioaddr_desc *)&xioaddr_stdout0, NULL };
const union xioaddr_desc *xioaddrs_stderr[] = {
(union xioaddr_desc *)&xioaddr_stderr0, NULL };
/* process a bidirectional "stdio" or "-" argument with options. */
int xioopen_stdio_bi(xiofile_t *sock) {
struct opt *opts1, *opts2, *optspr;
unsigned int groups1 = xioaddr_stdio0.groups, groups2 = xioaddr_stdio0.groups;
int result;
sock->stream.rfd = 0 /*stdin*/;
sock->stream.wfd = 1 /*stdout*/;
#if WITH_TERMIOS
if (Isatty(sock->stream.rfd)) {
if (Tcgetattr(sock->stream.rfd,
&sock->stream.savetty)
< 0) {
Warn2("cannot query current terminal settings on fd %d: %s",
sock->stream.rfd, strerror(errno));
} else {
sock->stream.ttyvalid = true;
}
}
if (Isatty(sock->stream.wfd) && (sock->stream.wfd != sock->stream.rfd)) {
if (Tcgetattr(sock->stream.wfd,
&sock->stream.savetty)
< 0) {
Warn2("cannot query current terminal settings on fd %d: %s",
sock->stream.wfd, strerror(errno));
} else {
sock->stream.ttyvalid = true;
}
}
#endif /* WITH_TERMIOS */
if (applyopts_single(&sock->stream, sock->stream.opts, PH_INIT) < 0)
return -1;
applyopts(-1, sock->stream.opts, PH_INIT);
if (sock->stream.howtoshut == XIOSHUT_UNSPEC)
sock->stream.howtoshut = XIOSHUT_NONE;
/* options here are one-time and one-direction, no second use */
retropt_bool(sock->stream.opts, OPT_IGNOREEOF, &sock->stream.ignoreeof);
/* extract opts that should be applied only once */
if ((optspr = copyopts(sock->stream.opts, GROUP_PROCESS)) == NULL) {
return -1;
}
if ((result = applyopts(-1, optspr, PH_EARLY)) < 0)
return result;
if ((result = applyopts(-1, optspr, PH_PREOPEN)) < 0)
return result;
/* here we copy opts, because most have to be applied twice! */
if ((opts1 = copyopts(sock->stream.opts, GROUP_FD|GROUP_APPL|(groups1&~GROUP_PROCESS))) == NULL) {
return -1;
}
/* apply options to first FD */
if ((result = applyopts(sock->stream.rfd, opts1, PH_ALL)) < 0) {
return result;
}
if ((result = _xio_openlate(&sock->stream, opts1)) < 0) {
return result;
}
if ((opts2 = copyopts(sock->stream.opts, GROUP_FD|GROUP_APPL|(groups2&~GROUP_PROCESS))) == NULL) {
return -1;
}
/* apply options to second FD */
if ((result = applyopts(sock->stream.wfd, opts2, PH_ALL)) < 0) {
return result;
}
if ((result = _xio_openlate(&sock->stream, opts2)) < 0) {
return result;
}
if ((result = _xio_openlate(&sock->stream, optspr)) < 0) {
return result;
}
Notice("reading from and writing to stdio");
return 0;
}
/* wrap around unidirectional xioopensingle and xioopen_fd to automatically determine stdin or stdout fd depending on rw.
Do not set FD_CLOEXEC flag. */
static int xioopen_stdio(int argc, const char *argv[], struct opt *opts, int xioflags, xiofile_t *xfd, unsigned groups, int dummy1, int dummy2, int dummy3) {
int rw = (xioflags&XIO_ACCMODE);
if (argc != 1) {
Error2("%s: wrong number of parameters (%d instead of 0)", argv[0], argc-1);
}
if (rw == XIO_RDWR) {
return xioopen_stdio_bi(xfd);
}
Notice2("using %s for %s",
&("stdin\0\0\0stdout"[rw<<3]),
ddirection[rw]);
return xioopen_fd(opts, rw, xfd,
XIOWITHRD(rw)?0:-1,
XIOWITHWR(rw)?1:-1,
dummy2, dummy3);
}
/* wrap around unidirectional xioopensingle and xioopen_fd to automatically determine stdin or stdout fd depending on rw.
Do not set FD_CLOEXEC flag. */
static int xioopen_stdfd(int argc, const char *argv[], struct opt *opts, int xioflags, xiofile_t *xfd, unsigned groups, int fd, int dummy2, int dummy3) {
int rw = (xioflags&XIO_ACCMODE);
if (argc != 1) {
Error2("%s: wrong number of parameters (%d instead of 0)", argv[0], argc-1);
}
Notice2("using %s for %s",
&("stdin\0\0\0stdout\0\0stderr"[fd<<3]),
ddirection[rw]);
return xioopen_fd(opts, rw, xfd,
XIOWITHRD(rw)?fd:-1,
XIOWITHWR(rw)?fd:-1,
dummy2, dummy3);
}
#endif /* WITH_STDIO */