/* process an unnamed bidirectional "pipe" or "fifo" or "echo" argument with
options */
static int xioopen_fifo_unnamed(xiofile_t *sock, struct opt *opts) {
struct opt *opts2;
int filedes[2];
int numleft;
int result;
if (applyopts_single(&sock->stream, opts, PH_INIT) < 0) return -1;
applyopts(-1, opts, PH_INIT);
if (Pipe(filedes) != 0) {
Error2("pipe(%p): %s", filedes, strerror(errno));
return -1;
}
/*0 Info2("pipe({%d,%d})", filedes[0], filedes[1]);*/
sock->common.tag = XIO_TAG_RDWR;
sock->stream.dtype = XIODATA_PIPE;
sock->stream.fd = filedes[0];
sock->stream.para.bipipe.fdout = filedes[1];
applyopts_cloexec(sock->stream.fd, opts);
applyopts_cloexec(sock->stream.para.bipipe.fdout, opts);
/* one-time and input-direction options, no second application */
retropt_bool(opts, OPT_IGNOREEOF, &sock->stream.ignoreeof);
/* here we copy opts! */
if ((opts2 = copyopts(opts, GROUP_FIFO)) == NULL) {
return STAT_NORETRY;
}
/* apply options to first FD */
if ((result = applyopts(sock->stream.fd, opts, PH_ALL)) < 0) {
return result;
}
if ((result = applyopts_single(&sock->stream, opts, PH_ALL)) < 0) {
return result;
}
/* apply options to second FD */
if ((result = applyopts(sock->stream.para.bipipe.fdout, opts2, PH_ALL)) < 0)
{
return result;
}
if ((numleft = leftopts(opts)) > 0) {
Error1("%d option(s) could not be used", numleft);
showleft(opts);
}
Notice("writing to and reading from unnamed pipe");
return 0;
}
static int xioopen_system(int argc, const char *argv[], struct opt *opts,
int xioflags, /* XIO_RDONLY etc. */
xiofile_t *fd,
unsigned groups,
int dummy1, int dummy2, int dummy3
) {
int status;
char *path = NULL;
int duptostderr;
int result;
const char *string = argv[1];
status = _xioopen_foxec(xioflags, &fd->stream, groups, &opts, &duptostderr);
if (status < 0) return status;
if (status == 0) { /* child */
int numleft;
/* do not shutdown connections that belong our parent */
sock[0] = NULL;
sock[1] = NULL;
if (setopt_path(opts, &path) < 0) {
/* this could be dangerous, so let us abort this child... */
Exit(1);
}
if ((numleft = leftopts(opts)) > 0) {
Error1("%d option(s) could not be used", numleft);
showleft(opts);
return STAT_NORETRY;
}
/* only now redirect stderr */
if (duptostderr >= 0) {
diag_dup();
Dup2(duptostderr, 2);
}
Info1("executing shell command \"%s\"", string);
errno=0;
result = System(string);
if (result != 0) {
Warn2("system(\"%s\") returned with status %d", string, result);
if (errno != 0)
Warn1("system(): %s", strerror(errno));
}
Exit(result>>8); /* this child process */
}
static int xioopen_exec(int argc, const char *argv[], struct opt *opts,
int xioflags, /* XIO_RDONLY, XIO_MAYCHILD etc. */
xiofile_t *fd,
unsigned groups,
int dummy1, int dummy2, int dummy3
) {
int status;
bool dash = false;
int duptostderr;
if (argc != 2) {
Error3("\"%s:%s\": wrong number of parameters (%d instead of 1)", argv[0], argv[1], argc-1);
}
retropt_bool(opts, OPT_DASH, &dash);
status = _xioopen_foxec(xioflags, &fd->stream, groups, &opts, &duptostderr);
if (status < 0) return status;
if (status == 0) { /* child */
const char *ends[] = { " ", NULL };
const char *hquotes[] = { "'", NULL };
const char *squotes[] = { "\"", NULL };
const char *nests[] = {
"'", "'",
"(", ")",
"[", "]",
"{", "}",
NULL
} ;
char **pargv = NULL;
int pargc;
size_t len;
const char *strp;
char *token; /*! */
char *tokp;
char *path = NULL;
char *tmp;
int numleft;
/*! Close(something) */
/* parse command line */
Debug1("child: args = \"%s\"", argv[1]);
pargv = Malloc(8*sizeof(char *));
if (pargv == NULL) return STAT_RETRYLATER;
len = strlen(argv[1])+1;
strp = argv[1];
token = Malloc(len); /*! */
tokp = token;
if (nestlex(&strp, &tokp, &len, ends, hquotes, squotes, nests,
true, true, false) < 0) {
Error("internal: miscalculated string lengths");
}
*tokp++ = '\0';
pargv[0] = strrchr(tokp-1, '/');
if (pargv[0] == NULL) pargv[0] = token; else ++pargv[0];
pargc = 1;
while (*strp == ' ') {
while (*++strp == ' ') ;
if ((pargc & 0x07) == 0) {
pargv = Realloc(pargv, (pargc+8)*sizeof(char *));
if (pargv == NULL) return STAT_RETRYLATER;
}
pargv[pargc++] = tokp;
if (nestlex(&strp, &tokp, &len, ends, hquotes, squotes, nests,
true, true, false) < 0) {
Error("internal: miscalculated string lengths");
}
*tokp++ = '\0';
}
pargv[pargc] = NULL;
if ((tmp = Malloc(strlen(pargv[0])+2)) == NULL) {
return STAT_RETRYLATER;
}
if (dash) {
tmp[0] = '-';
strcpy(tmp+1, pargv[0]);
} else {
strcpy(tmp, pargv[0]);
}
pargv[0] = tmp;
if (setopt_path(opts, &path) < 0) {
/* this could be dangerous, so let us abort this child... */
Exit(1);
}
if ((numleft = leftopts(opts)) > 0) {
Error1("%d option(s) could not be used", numleft);
showleft(opts);
return STAT_NORETRY;
}
/* only now redirect stderr */
if (duptostderr >= 0) {
diag_dup();
Dup2(duptostderr, 2);
}
Notice1("execvp'ing \"%s\"", token);
Execvp(token, pargv);
/* here we come only if execvp() failed */
switch (pargc) {
case 1: Error3("execvp(\"%s\", \"%s\"): %s", token, pargv[0], strerror(errno)); break;
case 2: Error4("execvp(\"%s\", \"%s\", \"%s\"): %s", token, pargv[0], pargv[1], strerror(errno)); break;
case 3:
default:
Error5("execvp(\"%s\", \"%s\", \"%s\", \"%s\", ...): %s", token, pargv[0], pargv[1], pargv[2], strerror(errno)); break;
}
Exit(1); /* this child process */
}
/* parent */
return 0;
}
/* fork for exec/system, but return before exec'ing.
return=0: is child process
return>0: is parent process
return<0: error occurred, assume parent process and no child exists !!!
function formerly known as _xioopen_foxec()
*/
int _xioopen_progcall(int xioflags, /* XIO_RDONLY etc. */
struct single *xfd,
unsigned groups,
struct opt **copts, /* in: opts; out: opts for child */
int *duptostderr,
bool inter, /* is interaddr, not endpoint */
int form /* with interaddr: =2: FDs 1,0--4,3
=1: FDs 1--0 */
) {
struct single *fd = xfd;
struct opt *popts; /* parent process options */
int numleft;
int sv[2], rdpip[2], wrpip[2];
int saverfd = -1, savewfd = -1; /* with inter addr, save assigned right fds */
int rw = (xioflags & XIO_ACCMODE);
char *commname;
int commtype = XIOCOMM_SOCKETPAIRS;
bool usepipes = false;
#if HAVE_PTY
int ptyfd = -1, ttyfd = -1;
bool usebestpty = false; /* use the best available way to open pty */
#if defined(HAVE_DEV_PTMX) || defined(HAVE_DEV_PTC)
bool useptmx = false; /* use /dev/ptmx or equivalent */
#endif
#if HAVE_OPENPTY
bool useopenpty = false; /* try only openpty */
#endif /* HAVE_OPENPTY */
bool usepty = false; /* any of the pty options is selected */
char ptyname[MAXPTYNAMELEN];
#endif /* HAVE_PTY */
pid_t pid = 0; /* mostly int */
int leftfd[2] = { 0, 1 };
# define fdi (leftfd[0])
# define fdo (leftfd[1])
int rightfd[2] = { 3, 4 };
# define rightin (rightfd[0])
# define rightout (rightfd[1])
short result;
bool withstderr = false;
bool nofork = false;
bool withfork;
popts = moveopts(*copts, GROUP_ALL);
if (applyopts_single(fd, popts, PH_INIT) < 0) return -1;
applyopts2(-1, popts, PH_INIT, PH_EARLY);
retropt_bool(popts, OPT_NOFORK, &nofork);
withfork = !nofork;
if ((retropt_string(popts, OPT_COMMTYPE, &commname)) >= 0) {
if ((commtype = getcommtype(commname)) < 0) {
Error1("bad communication type \"%s\"", commname);
commtype = XIOCOMM_SOCKETPAIRS;
}
}
retropt_bool(popts, OPT_PIPES, &usepipes);
#if HAVE_PTY
retropt_bool(popts, OPT_PTY, &usebestpty);
#if HAVE_OPENPTY
retropt_bool(popts, OPT_OPENPTY, &useopenpty);
#endif
#if defined(HAVE_DEV_PTMX) || defined(HAVE_DEV_PTC)
retropt_bool(popts, OPT_PTMX, &useptmx);
#endif
usepty = (usebestpty
#if HAVE_OPENPTY
|| useopenpty
#endif
#if defined(HAVE_DEV_PTMX) || defined(HAVE_DEV_PTC)
|| useptmx
#endif
);
if (usepipes && usepty) {
Warn("_xioopen_foxec(): options \"pipes\" and \"pty\" must not be specified together; ignoring \"pipes\"");
usepipes = false;
}
#endif /* HAVE_PTY */
if (usepty) {
commtype = XIOCOMM_PTY;
} else if (usepipes) {
commtype = XIOCOMM_PIPES;
}
/*------------------------------------------------------------------------*/
/* retrieve options regarding file descriptors */
if (!retropt_int(popts, OPT_LEFTFD, &fdi)) {
fdo = fdi;
}
retropt_int(popts, OPT_LEFTINFD, &fdi);
retropt_int(popts, OPT_LEFTOUTFD, &fdo);
if (!retropt_int(popts, OPT_RIGHTFD, &rightin)) {
rightout = rightin;
}
retropt_int(popts, OPT_RIGHTINFD, &rightin);
retropt_int(popts, OPT_RIGHTOUTFD, &rightout);
/* when the superordinate communication type provides two distinct fds we
cannot pass just one fd to the program */
if (rw == XIO_RDWR && rightin==rightout) {
struct stat rstat, wstat;
if (Fstat(xfd->rfd, &rstat) < 0)
Error2("fstat(%d, ...): %s", xfd->rfd, strerror(errno));
if (Fstat(xfd->wfd, &wstat) < 0)
Error2("fstat(%d, ...): %s", xfd->wfd, strerror(errno));
if (memcmp(&rstat, &wstat, sizeof(rstat))) {
Error("exec/system: your rightfd options require the same FD for both directions but the communication environment provides two different FDs");
}
}
/*------------------------------------------------------------------------*/
if (rw == XIO_WRONLY) {
if (fd->howtoclose == XIOCLOSE_UNSPEC) {
fd->howtoclose = XIOCLOSE_SLEEP_SIGTERM;
}
}
if (withfork) {
const char *typename;
if (!(xioflags&XIO_MAYCHILD)) {
Error("fork for exec not allowed in this context");
/*!! free something */
return -1;
}
fd->flags |= XIO_DOESCHILD;
switch (commtype) {
case XIOCOMM_PIPES: typename = "pipes"; break;
#if HAVE_PTY
case XIOCOMM_PTY: typename = "pty"; break;
case XIOCOMM_PTYS: typename = "two pty's"; break;
#endif /* HAVE_PTY */
case XIOCOMM_SOCKETPAIR: typename = "socketpair"; break;
case XIOCOMM_SOCKETPAIRS: typename = "two socketpairs"; break;
#if _WITH_TCP
case XIOCOMM_TCP: typename = "TCP socket pair"; break;
case XIOCOMM_TCP4: typename = "TCP4 socket pair"; break;
case XIOCOMM_TCP4_LISTEN: typename = "TCP4 listen socket pair"; break;
#endif
default: typename = NULL; break;
}
Notice2("forking off child, using %s for %s",
typename, ddirection[rw]);
}
applyopts(-1, popts, PH_PREBIGEN);
if (inter) {
saverfd = xfd->rfd;
savewfd = xfd->wfd;
xfd->howtoshut = XIOSHUT_UNSPEC;
xfd->howtoclose = XIOCLOSE_UNSPEC;
}
if (!withfork) {
/*0 struct single *stream1, *stream2;*/
free(*copts);
*copts = moveopts(popts, GROUP_ALL);
/* what if WE are sock1 ? */
#if 1
if (!(xioflags & XIO_MAYEXEC /* means exec+nofork */)) {
Error("nofork option is not allowed here");
/*!! free something */
return -1;
}
fd->flags |= XIO_DOESEXEC;
#else /*!! */
if (sock1 == NULL) {
Fatal("nofork option must no be applied to first socat address");
}
#endif
if (fd->howtoclose == XIOCLOSE_UNSPEC) {
fd->howtoclose = XIOCLOSE_CLOSE;
}
#if 0 /*!! */
if (sock1->tag == XIO_TAG_DUAL) {
stream1 = &sock1->dual.stream[0]->stream;
stream2 = &sock1->dual.stream[1]->stream;
} else {
stream1 = &sock1->stream;
stream2 = &sock1->stream;
}
if (stream1->dtype == DATA_READLINE || stream2->dtype == DATA_READLINE ||
stream1->dtype == DATA_OPENSSL || stream2->dtype == DATA_OPENSSL
) {
Error("with option nofork, openssl and readline in address1 do not work");
}
if (stream1->lineterm != LINETERM_RAW ||
stream2->lineterm != LINETERM_RAW ||
stream1->ignoreeof || stream2->ignoreeof) {
Warn("due to option nofork, address1 options for lineterm and igoreeof do not apply");
}
#endif
/*! problem: when fdi==WRFD(sock[0]) or fdo==RDFD(sock[0]) */
if (rw != XIO_WRONLY) {
if (XIO_GETRDFD(sock[0]/*!!!*/) == fdi) {
if (Fcntl_l(fdi, F_SETFD, 0) < 0) {
Warn2("fcntl(%d, F_SETFD, 0): %s", fdi, strerror(errno));
}
if (Dup2(XIO_GETRDFD(sock[0]), fdi) < 0) {
Error3("dup2(%d, %d): %s",
XIO_GETRDFD(sock[0]), fdi, strerror(errno));
}
/*0 Info2("dup2(%d, %d)", XIO_GETRDFD(sock[0]), fdi);*/
} else {
if (Dup2(XIO_GETRDFD(sock[0]), fdi) < 0) {
Error3("dup2(%d, %d): %s",
XIO_GETRDFD(sock[0]), fdi, strerror(errno));
}
/*0 Info2("dup2(%d, %d)", XIO_GETRDFD(sock[0]), fdi);*/
}
}
if (rw != XIO_RDONLY) {
if (XIO_GETWRFD(sock[0]) == fdo) {
if (Fcntl_l(fdo, F_SETFD, 0) < 0) {
Warn2("fcntl(%d, F_SETFD, 0): %s", fdo, strerror(errno));
}
if (Dup2(XIO_GETWRFD(sock[0]), fdo) < 0) {
Error3("dup2(%d, %d): %s)",
XIO_GETWRFD(sock[0]), fdo, strerror(errno));
}
/*0 Info2("dup2(%d, %d)", XIO_GETWRFD(sock[0]), fdo);*/
} else {
if (Dup2(XIO_GETWRFD(sock[0]), fdo) < 0) {
Error3("dup2(%d, %d): %s)",
XIO_GETWRFD(sock[0]), fdo, strerror(errno));
}
/*0 Info2("dup2(%d, %d)", XIO_GETWRFD(sock[0]), fdo);*/
}
}
} else /* withfork */
/* create fd pair(s), set related xfd parameters, and apply options */
switch (commtype) {
#if HAVE_PTY
case XIOCOMM_PTY:
/*!indent*/
#if defined(HAVE_DEV_PTMX)
# define PTMX "/dev/ptmx" /* Linux */
#elif HAVE_DEV_PTC
# define PTMX "/dev/ptc" /* AIX 4.3.3 */
#endif
fd->dtype = XIODATA_PTY;
#if 0
if (fd->howtoshut == XIOSHUT_UNSPEC) {
fd->howtoshut = XIOSHUTRD_SIGTERM|XIOSHUTWR_SIGHUP;
}
if (fd->howtoclose == XIOCLOSE_UNSPEC) {
fd->howtoclose = XIOCLOSE_CLOSE_SIGTERM;
}
#endif
if (xiopty(usebestpty||useptmx, &ttyfd, &ptyfd) < 0) {
return -1;
}
free(*copts);
if ((*copts = moveopts(popts, GROUP_TERMIOS|GROUP_FORK|GROUP_EXEC|GROUP_PROCESS)) == NULL) {
return -1;
}
applyopts_cloexec(ptyfd, popts);/*!*/
/* exec:...,pty did not kill child process under some circumstances */
if (fd->howtoshut == XIOSHUT_UNSPEC) {
fd->howtoshut = XIOSHUTRD_SIGTERM|XIOSHUTWR_SIGHUP;
}
if (fd->howtoclose == XIOCLOSE_UNSPEC) {
fd->howtoclose = XIOCLOSE_CLOSE_SIGTERM;
}
/* this for parent, was after fork */
applyopts(ptyfd, popts, PH_FD);
applyopts(ptyfd, popts, PH_LATE);
if (applyopts_single(fd, popts, PH_LATE) < 0) return -1;
if (XIOWITHRD(rw)) fd->rfd = ptyfd;
if (XIOWITHWR(rw)) fd->wfd = ptyfd;
/* this for child, was after fork */
applyopts(ttyfd, *copts, PH_FD);
break;
#endif /* HAVE_PTY */
case XIOCOMM_PIPES: {
/*!indent*/
struct opt *popts2, *copts2;
if (rw == XIO_RDWR) {
fd->dtype = XIODATA_2PIPE;
}
if (fd->howtoshut == XIOSHUT_UNSPEC || fd->howtoshut == XIOSHUT_DOWN) {
fd->howtoshut = XIOSHUT_CLOSE;
}
if (fd->howtoclose == XIOCLOSE_UNSPEC) {
fd->howtoclose = XIOCLOSE_CLOSE;
}
if (rw != XIO_WRONLY) {
if (Pipe(rdpip) < 0) {
Error2("pipe(%p): %s", rdpip, strerror(errno));
return -1;
}
}
/*0 Info2("pipe({%d,%d})", rdpip[0], rdpip[1]);*/
/* rdpip[0]: read by socat; rdpip[1]: write by child */
free(*copts);
if ((*copts = moveopts(popts, GROUP_FORK|GROUP_EXEC|GROUP_PROCESS))
== NULL) {
return -1;
}
popts2 = copyopts(popts, GROUP_ALL);
copts2 = copyopts(*copts, GROUP_ALL);
if (rw != XIO_WRONLY) {
applyopts_cloexec(rdpip[0], popts);
applyopts(rdpip[0], popts, PH_FD);
applyopts(rdpip[1], *copts, PH_FD);
}
if (rw != XIO_RDONLY) {
if (Pipe(wrpip) < 0) {
Error2("pipe(%p): %s", wrpip, strerror(errno));
return -1;
}
}
/*0 Info2("pipe({%d,%d})", wrpip[0], wrpip[1]);*/
/* wrpip[1]: write by socat; wrpip[0]: read by child */
if (rw != XIO_RDONLY) {
applyopts_cloexec(wrpip[1], popts2);
applyopts(wrpip[1], popts2, PH_FD);
applyopts(wrpip[0], copts2, PH_FD);
}
/* this for parent, was after fork */
if (XIOWITHRD(rw)) fd->rfd = rdpip[0];
if (XIOWITHWR(rw)) fd->wfd = wrpip[1];
applyopts(fd->rfd, popts, PH_FD);
applyopts(fd->rfd, popts, PH_LATE);
if (applyopts_single(fd, popts, PH_LATE) < 0) return -1;
break;
}
case XIOCOMM_SOCKETPAIR: {
/*!indent*/
int pf = AF_UNIX;
retropt_int(popts, OPT_PROTOCOL_FAMILY, &pf);
result = xiosocketpair(popts, pf, SOCK_STREAM, 0, sv);
if (result < 0) {
return -1;
}
if (xfd->howtoshut == XIOSHUT_UNSPEC) {
xfd->howtoshut = XIOSHUT_DOWN;
}
if (xfd->howtoclose == XIOCLOSE_UNSPEC) {
xfd->howtoclose = XIOCLOSE_CLOSE;
}
/*0 Info5("socketpair(%d, %d, %d, {%d,%d})",
d, type, protocol, sv[0], sv[1]);*/
free(*copts);
if ((*copts = moveopts(popts, GROUP_FORK|GROUP_EXEC|GROUP_PROCESS)) == NULL) {
return -1;
}
applyopts(sv[0], *copts, PH_PASTSOCKET);
applyopts(sv[1], popts, PH_PASTSOCKET);
applyopts_cloexec(sv[0], *copts);
applyopts(sv[0], *copts, PH_FD);
applyopts(sv[1], popts, PH_FD);
applyopts(sv[0], *copts, PH_PREBIND);
applyopts(sv[0], *copts, PH_BIND);
applyopts(sv[0], *copts, PH_PASTBIND);
applyopts(sv[1], popts, PH_PREBIND);
applyopts(sv[1], popts, PH_BIND);
applyopts(sv[1], popts, PH_PASTBIND);
Warn1("xio-progcall.c: fd->howtoshut == %d", fd->howtoshut);
if (inter || fd->howtoshut == XIOSHUT_UNSPEC) {
fd->howtoshut = XIOSHUT_DOWN;
}
if (fd->howtoclose == XIOCLOSE_UNSPEC) {
fd->howtoclose = XIOCLOSE_SIGTERM;
}
/* this for parent, was after fork */
/*!!!*/ Warn2("2: fd->rfd==%d, fd->wfd==%d", fd->rfd, fd->wfd);
if (XIOWITHRD(rw)) fd->rfd = sv[0];
if (XIOWITHWR(rw)) fd->wfd = sv[0];
/*!!!*/ Warn2("3: fd->rfd==%d, fd->wfd==%d", fd->rfd, fd->wfd);
applyopts(fd->rfd, popts, PH_FD);
applyopts(fd->rfd, popts, PH_LATE);
if (applyopts_single(fd, popts, PH_LATE) < 0) return -1;
}
break;
case XIOCOMM_TCP:
case XIOCOMM_TCP4: {
/*!indent*/
int pf = AF_INET;
xiofd_t socatfd, execfd;
retropt_int(popts, OPT_PROTOCOL_FAMILY, &pf);
if (xiocommpair(commtype, XIOWITHWR(rw), XIOWITHRD(rw),
0, &socatfd, &execfd) < 0) {
return -1;
}
free(*copts);
if ((*copts = moveopts(popts, GROUP_FORK|GROUP_EXEC|GROUP_PROCESS)) == NULL) {
return -1;
}
sv[0] = socatfd.rfd; /*!!! r/w */
sv[1] = execfd.wfd;
applyopts(socatfd.rfd, *copts, PH_PASTSOCKET);
applyopts(execfd.rfd, popts, PH_PASTSOCKET);
applyopts_cloexec(sv[0], *copts);
applyopts(sv[0], *copts, PH_FD);
applyopts(sv[1], popts, PH_FD);
applyopts(sv[0], *copts, PH_PREBIND);
applyopts(sv[0], *copts, PH_BIND);
applyopts(sv[0], *copts, PH_PASTBIND);
applyopts(sv[1], popts, PH_PREBIND);
applyopts(sv[1], popts, PH_BIND);
applyopts(sv[1], popts, PH_PASTBIND);
Warn1("xio-progcall.c: fd->howtoshut == %d", fd->howtoshut);
if (inter || fd->howtoshut == XIOSHUT_UNSPEC) {
fd->howtoshut = XIOSHUT_DOWN;
}
if (fd->howtoclose == XIOCLOSE_UNSPEC) {
fd->howtoclose = XIOCLOSE_SIGTERM;
}
/* this for parent, was after fork */
if (XIOWITHRD(rw)) fd->rfd = sv[0];
if (XIOWITHWR(rw)) fd->wfd = sv[0];
applyopts(fd->rfd, popts, PH_FD);
applyopts(fd->rfd, popts, PH_LATE);
if (applyopts_single(fd, popts, PH_LATE) < 0) return -1;
}
break;
#if LATER
case XIOCOMM_TCP4_LISTEN: {
/*!indent*/
int pf = AF_INET;
xiofd_t socatfd, execfd;
retropt_int(popts, OPT_PROTOCOL_FAMILY, &pf);
if (xiocommpair(commtype, XIOWITHWR(rw), XIOWITHRD(rw),
0, &socatfd, &execfd) < 0) {
return -1;
}
free(*copts);
if ((*copts = moveopts(popts, GROUP_TERMIOS|GROUP_FORK|GROUP_EXEC|GROUP_PROCESS)) == NULL) {
return -1;
}
applyopts_cloexec(ptyfd, popts);/*!*/
}
break;
#endif /* LATER */
case XIOCOMM_SOCKETPAIRS:
case XIOCOMM_PTYS: {
xiofd_t socatfd, execfd;
struct termios andmask, ormask;
switch (commtype) {
case XIOCOMM_SOCKETPAIRS:
if (xiocommpair(commtype, XIOWITHWR(rw), XIOWITHRD(rw),
0, &socatfd, &execfd, PF_UNIX, SOCK_STREAM, 0) < 0)
return -1;
break;
case XIOCOMM_PTYS:
if (xiocommpair(commtype, XIOWITHWR(rw), XIOWITHRD(rw),
0, &socatfd, &execfd, &andmask, &ormask) < 0)
return -1;
break;
}
free(*copts);
if ((*copts = copyopts(popts, GROUP_TERMIOS|GROUP_FORK)) == NULL) {
return -1;
}
if (socatfd.rfd >= 0) {
applyopts_cloexec(socatfd.rfd, *copts);/*!*/
applyopts(socatfd.rfd, *copts, PH_FD);
applyopts(socatfd.rfd, *copts, PH_LATE);
}
if (applyopts_single(xfd, *copts, PH_LATE) < 0) return -1;
free(*copts);
if ((*copts = moveopts(popts, GROUP_TERMIOS|GROUP_FORK|GROUP_EXEC|GROUP_PROCESS)) == NULL) {
return -1;
}
if (socatfd.wfd >= 0) {
applyopts_cloexec(socatfd.wfd, *copts);/*!*/
applyopts(socatfd.wfd, *copts, PH_FD);
applyopts(socatfd.wfd, *copts, PH_LATE);
}
if (applyopts_single(xfd, *copts, PH_LATE) < 0) return -1;
if (XIOWITHRD(rw)) xfd->rfd = socatfd.rfd;
if (XIOWITHWR(rw)) xfd->wfd = socatfd.wfd;
xfd->dtype = socatfd.dtype;
if (xfd->howtoshut == XIOSHUT_UNSPEC)
xfd->howtoshut = socatfd.howtoshut;
if (fd->howtoclose == XIOCLOSE_UNSPEC) {
fd->howtoclose = XIOWITHRD(rw)?XIOCLOSE_CLOSE_SIGTERM:XIOCLOSE_SLEEP_SIGTERM;
}
wrpip[0] = execfd.rfd;
rdpip[1] = execfd.wfd;
rdpip[0] = socatfd.rfd;
wrpip[1] = socatfd.wfd;
}
break;
default:
Error1("_xioopen_progcall() internal: commtype %d not handled",
commtype);
break;
}
/*0 if ((optpr = copyopts(*copts, GROUP_PROCESS)) == NULL)
return -1;*/
retropt_bool(*copts, OPT_STDERR, &withstderr);
xiosetchilddied(); /* set SIGCHLD handler */
xiosetchilddied(); /* set SIGCHLD handler */
if (withfork) {
sigset_t set, oldset;
sigemptyset(&set);
sigaddset(&set, SIGCHLD);
Sigprocmask(SIG_BLOCK, &set, &oldset); /* disable SIGCHLD */
pid = xio_fork(true, E_ERROR);
if (pid < 0) {
Sigprocmask(SIG_SETMASK, &oldset, NULL);
Error1("fork(): %s", strerror(errno));
return -1;
}
if (pid > 0) {
/* for parent (this is our socat process) */
xiosigchld_register(pid, xiosigaction_child, fd);
Sigprocmask(SIG_SETMASK, &oldset, NULL); /* enable SIGCHLD */
}
if (pid == 0) { /* child */
/* drop parents locks, reset FIPS... */
if (xio_forked_inchild() != 0) {
Exit(1);
}
Sigprocmask(SIG_SETMASK, &oldset, NULL); /* enable SIGCHLD */
}
}
if (!withfork || pid == 0) { /* child */
uid_t user;
gid_t group;
if (withfork) {
if (Signal(SIGCHLD, SIG_IGN) == SIG_ERR) {
Warn1("signal(SIGCHLD, SIG_IGN): %s", strerror(errno));
}
/* dup2() the fds to desired values, close old fds, and apply late
options */
switch (commtype) {
#if HAVE_PTY
case XIOCOMM_PTY:
if (rw != XIO_RDONLY && fdi != ttyfd) {
if (Dup2(ttyfd, fdi) < 0) {
Error3("dup2(%d, %d): %s", ttyfd, fdi, strerror(errno));
return -1; }
/*0 Info2("dup2(%d, %d)", ttyfd, fdi);*/
}
if (rw != XIO_WRONLY && fdo != ttyfd) {
if (Dup2(ttyfd, fdo) < 0) {
Error3("dup2(%d, %d): %s", ttyfd, fdo, strerror(errno));
return -1; }
/*0 Info2("dup2(%d, %d)", ttyfd, fdo);*/
}
if ((rw == XIO_RDONLY || fdi != ttyfd) &&
(rw == XIO_WRONLY || fdo != ttyfd)) {
applyopts_cloexec(ttyfd, *copts);
}
applyopts(ttyfd, *copts, PH_LATE);
applyopts(ttyfd, *copts, PH_LATE2);
break;
#endif /* HAVE_PTY */
case XIOCOMM_PIPES:
case XIOCOMM_SOCKETPAIRS:
case XIOCOMM_PTYS:
{
/*!indent*/
/* we might have a temporary conflict between what FDs are
currently allocated, and which are to be used. We try to find
a graceful solution via temporary descriptors */
int tmpi, tmpo;
/* needed with system() (not with exec()) */
if (XIOWITHRD(rw)) Close(rdpip[0]);
if (XIOWITHWR(rw)) Close(wrpip[1]);
#if 0
/*! might not be needed */
if (XIOWITHRD(rw)) Close(rdpip[0]);
if (XIOWITHWR(rw)) Close(wrpip[1]);
if (fdi == rdpip[1]) { /* a conflict here */
if ((tmpi = Dup(wrpip[0])) < 0) {
Error2("dup(%d): %s", wrpip[0], strerror(errno));
return -1;
}
/*0 Info2("dup(%d) -> %d", wrpip[0], tmpi);*/
rdpip[1] = tmpi;
}
if (fdo == wrpip[0]) { /* a conflict here */
if ((tmpo = Dup(rdpip[1])) < 0) {
Error2("dup(%d): %s", rdpip[1], strerror(errno));
return -1;
}
/*0 Info2("dup(%d) -> %d", rdpip[1], tmpo);*/
wrpip[0] = tmpo;
}
if (rw != XIO_WRONLY && rdpip[1] != fdo) {
if (Dup2(rdpip[1], fdo) < 0) {
Error3("dup2(%d, %d): %s", rdpip[1], fdo, strerror(errno));
return -1;
}
Close(rdpip[1]);
/*0 Info2("dup2(%d, %d)", rdpip[1], fdo);*/
/*0 applyopts_cloexec(fdo, *copts);*/
}
if (rw != XIO_RDONLY && wrpip[0] != fdi) {
if (Dup2(wrpip[0], fdi) < 0) {
Error3("dup2(%d, %d): %s", wrpip[0], fdi, strerror(errno));
return -1;
}
Close(wrpip[0]);
/*0 Info2("dup2(%d, %d)", wrpip[0], fdi);*/
/*0 applyopts_cloexec(wrpip[0], *copts);*/ /* option is already consumed! */
/* applyopts_cloexec(fdi, *copts);*/ /* option is already consumed! */
}
#else
result = reassignfds(XIOWITHWR(rw)?wrpip[0]:-1,
XIOWITHRD(rw)?rdpip[1]:-1,
fdi, fdo);
if (result < 0) return result;
#endif
applyopts(fdi, *copts, PH_LATE);
applyopts(fdo, *copts, PH_LATE);
applyopts(fdi, *copts, PH_LATE2);
applyopts(fdo, *copts, PH_LATE2);
break;
}
case XIOCOMM_SOCKETPAIR:
case XIOCOMM_TCP:
case XIOCOMM_TCP4:
case XIOCOMM_TCP4_LISTEN:
/*!indent*/
if (rw != XIO_RDONLY && fdi != sv[1]) {
if (Dup2(sv[1], fdi) < 0) {
Error3("dup2(%d, %d): %s", sv[1], fdi, strerror(errno));
return -1; }
/*0 Info2("dup2(%d, %d)", sv[1], fdi);*/
}
if (rw != XIO_WRONLY && fdo != sv[1]) {
if (Dup2(sv[1], fdo) < 0) {
Error3("dup2(%d, %d): %s", sv[1], fdo, strerror(errno));
return -1; }
/*0 Info2("dup2(%d, %d)", sv[1], fdo);*/
}
if (fdi != sv[1] && fdo != sv[1]) {
applyopts_cloexec(sv[1], *copts);
Close(sv[1]);
}
applyopts(fdi, *copts, PH_LATE);
applyopts(fdi, *copts, PH_LATE2);
Close(sv[1]);
break;
default:
Error1("_xioopen_progcall() internal: commtype %d not handled",
commtype);
break;
}
/* in case of an inter address, assign the right side FDs (e.g. 3 and 4) */
if (inter) {
Info2("preparing the right side FDs %d and %d for exec process",
rightin, rightout);
result = reassignfds(XIOWITHRD(rw)?saverfd:-1,
XIOWITHWR(rw)?savewfd:-1,
rightin, form==2?rightout:STDOUT_FILENO);
if (result < 0) return result;
if (form == 2) {
Fcntl_l(rightin, F_SETFD, 0);
Fcntl_l(rightout, F_SETFD, 0);
}
}
} /* withfork */
else /* !withfork */ {
applyopts(-1, *copts, PH_LATE);
applyopts(-1, *copts, PH_LATE2);
}
_xioopen_setdelayeduser();
/* set group before user - maybe you are not permitted afterwards */
if (retropt_gidt(*copts, OPT_SETGID, &group) >= 0) {
Setgid(group);
}
if (retropt_uidt(*copts, OPT_SETUID, &user) >= 0) {
Setuid(user);
}
if (withstderr) {
*duptostderr = fdo;
} else {
*duptostderr = -1;
}
return 0; /* indicate child process */
}
/* for parent (this is our socat process) */
Notice1("forked off child process "F_pid, pid);
#if 0
if ((popts = copyopts(*copts,
GROUP_FD|GROUP_TERMIOS|GROUP_FORK|GROUP_SOCKET|GROUP_SOCK_UNIX|GROUP_FIFO)) == NULL)
return STAT_RETRYLATER;
#endif
/* in parent: close fds that are only needed in child */
switch (commtype) {
#if HAVE_PTY
case XIOCOMM_PTY:
if (Close(ttyfd) < 0) {
Info2("close(%d): %s", ttyfd, strerror(errno));
}
break;
#endif /* HAVE_PTY */
case XIOCOMM_SOCKETPAIR:
case XIOCOMM_TCP:
case XIOCOMM_TCP4:
case XIOCOMM_TCP4_LISTEN:
Close(sv[1]);
break;
case XIOCOMM_PIPES:
default:
if (XIOWITHWR(rw)) Close(wrpip[0]);
if (XIOWITHRD(rw)) Close(rdpip[1]);
break;
}
fd->child.pid = pid;
if (applyopts_single(fd, popts, PH_LATE) < 0) return -1;
applyopts_signal(fd, popts);
if ((numleft = leftopts(popts)) > 0) {
Error1("%d option(s) could not be used", numleft);
showleft(popts);
return STAT_NORETRY;
}
if (inter) {
if (XIOWITHRD(rw)) Close(saverfd);
if (XIOWITHWR(rw)) Close(savewfd);
}
return pid; /* indicate parent (main) process */
}