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-rw-r--r--slirp/misc.c925
1 files changed, 925 insertions, 0 deletions
diff --git a/slirp/misc.c b/slirp/misc.c
new file mode 100644
index 0000000000..7f6448dffd
--- /dev/null
+++ b/slirp/misc.c
@@ -0,0 +1,925 @@
+/*
+ * Copyright (c) 1995 Danny Gasparovski.
+ *
+ * Please read the file COPYRIGHT for the
+ * terms and conditions of the copyright.
+ */
+
+#define WANT_SYS_IOCTL_H
+#include <slirp.h>
+
+u_int curtime, time_fasttimo, last_slowtimo, detach_time;
+u_int detach_wait = 600000; /* 10 minutes */
+
+#if 0
+int x_port = -1;
+int x_display = 0;
+int x_screen = 0;
+
+int
+show_x(buff, inso)
+ char *buff;
+ struct socket *inso;
+{
+ if (x_port < 0) {
+ lprint("X Redir: X not being redirected.\r\n");
+ } else {
+ lprint("X Redir: In sh/bash/zsh/etc. type: DISPLAY=%s:%d.%d; export DISPLAY\r\n",
+ inet_ntoa(our_addr), x_port, x_screen);
+ lprint("X Redir: In csh/tcsh/etc. type: setenv DISPLAY %s:%d.%d\r\n",
+ inet_ntoa(our_addr), x_port, x_screen);
+ if (x_display)
+ lprint("X Redir: Redirecting to display %d\r\n", x_display);
+ }
+
+ return CFG_OK;
+}
+
+
+/*
+ * XXX Allow more than one X redirection?
+ */
+void
+redir_x(inaddr, start_port, display, screen)
+ u_int32_t inaddr;
+ int start_port;
+ int display;
+ int screen;
+{
+ int i;
+
+ if (x_port >= 0) {
+ lprint("X Redir: X already being redirected.\r\n");
+ show_x(0, 0);
+ } else {
+ for (i = 6001 + (start_port-1); i <= 6100; i++) {
+ if (solisten(htons(i), inaddr, htons(6000 + display), 0)) {
+ /* Success */
+ x_port = i - 6000;
+ x_display = display;
+ x_screen = screen;
+ show_x(0, 0);
+ return;
+ }
+ }
+ lprint("X Redir: Error: Couldn't redirect a port for X. Weird.\r\n");
+ }
+}
+#endif
+
+#ifndef HAVE_INET_ATON
+int
+inet_aton(cp, ia)
+ const char *cp;
+ struct in_addr *ia;
+{
+ u_int32_t addr = inet_addr(cp);
+ if (addr == 0xffffffff)
+ return 0;
+ ia->s_addr = addr;
+ return 1;
+}
+#endif
+
+/*
+ * Get our IP address and put it in our_addr
+ */
+void
+getouraddr()
+{
+ char buff[256];
+ struct hostent *he;
+
+ if (gethostname(buff,256) < 0)
+ return;
+
+ if ((he = gethostbyname(buff)) == NULL)
+ return;
+
+ our_addr = *(struct in_addr *)he->h_addr;
+}
+
+#if SIZEOF_CHAR_P == 8
+
+struct quehead_32 {
+ u_int32_t qh_link;
+ u_int32_t qh_rlink;
+};
+
+inline void
+insque_32(a, b)
+ void *a;
+ void *b;
+{
+ register struct quehead_32 *element = (struct quehead_32 *) a;
+ register struct quehead_32 *head = (struct quehead_32 *) b;
+ element->qh_link = head->qh_link;
+ head->qh_link = (u_int32_t)element;
+ element->qh_rlink = (u_int32_t)head;
+ ((struct quehead_32 *)(element->qh_link))->qh_rlink
+ = (u_int32_t)element;
+}
+
+inline void
+remque_32(a)
+ void *a;
+{
+ register struct quehead_32 *element = (struct quehead_32 *) a;
+ ((struct quehead_32 *)(element->qh_link))->qh_rlink = element->qh_rlink;
+ ((struct quehead_32 *)(element->qh_rlink))->qh_link = element->qh_link;
+ element->qh_rlink = 0;
+}
+
+#endif /* SIZEOF_CHAR_P == 8 */
+
+struct quehead {
+ struct quehead *qh_link;
+ struct quehead *qh_rlink;
+};
+
+inline void
+insque(a, b)
+ void *a, *b;
+{
+ register struct quehead *element = (struct quehead *) a;
+ register struct quehead *head = (struct quehead *) b;
+ element->qh_link = head->qh_link;
+ head->qh_link = (struct quehead *)element;
+ element->qh_rlink = (struct quehead *)head;
+ ((struct quehead *)(element->qh_link))->qh_rlink
+ = (struct quehead *)element;
+}
+
+inline void
+remque(a)
+ void *a;
+{
+ register struct quehead *element = (struct quehead *) a;
+ ((struct quehead *)(element->qh_link))->qh_rlink = element->qh_rlink;
+ ((struct quehead *)(element->qh_rlink))->qh_link = element->qh_link;
+ element->qh_rlink = NULL;
+ /* element->qh_link = NULL; TCP FIN1 crashes if you do this. Why ? */
+}
+
+/* #endif */
+
+
+int
+add_exec(ex_ptr, do_pty, exec, addr, port)
+ struct ex_list **ex_ptr;
+ int do_pty;
+ char *exec;
+ int addr;
+ int port;
+{
+ struct ex_list *tmp_ptr;
+
+ /* First, check if the port is "bound" */
+ for (tmp_ptr = *ex_ptr; tmp_ptr; tmp_ptr = tmp_ptr->ex_next) {
+ if (port == tmp_ptr->ex_fport && addr == tmp_ptr->ex_addr)
+ return -1;
+ }
+
+ tmp_ptr = *ex_ptr;
+ *ex_ptr = (struct ex_list *)malloc(sizeof(struct ex_list));
+ (*ex_ptr)->ex_fport = port;
+ (*ex_ptr)->ex_addr = addr;
+ (*ex_ptr)->ex_pty = do_pty;
+ (*ex_ptr)->ex_exec = strdup(exec);
+ (*ex_ptr)->ex_next = tmp_ptr;
+ return 0;
+}
+
+#ifndef HAVE_STRERROR
+
+/*
+ * For systems with no strerror
+ */
+
+extern int sys_nerr;
+extern char *sys_errlist[];
+
+char *
+strerror(error)
+ int error;
+{
+ if (error < sys_nerr)
+ return sys_errlist[error];
+ else
+ return "Unknown error.";
+}
+
+#endif
+
+
+#if 0
+int
+openpty(amaster, aslave)
+ int *amaster, *aslave;
+{
+ register int master, slave;
+
+#ifdef HAVE_GRANTPT
+ char *ptr;
+
+ if ((master = open("/dev/ptmx", O_RDWR)) < 0 ||
+ grantpt(master) < 0 ||
+ unlockpt(master) < 0 ||
+ (ptr = ptsname(master)) == NULL) {
+ close(master);
+ return -1;
+ }
+
+ if ((slave = open(ptr, O_RDWR)) < 0 ||
+ ioctl(slave, I_PUSH, "ptem") < 0 ||
+ ioctl(slave, I_PUSH, "ldterm") < 0 ||
+ ioctl(slave, I_PUSH, "ttcompat") < 0) {
+ close(master);
+ close(slave);
+ return -1;
+ }
+
+ *amaster = master;
+ *aslave = slave;
+ return 0;
+
+#else
+
+ static char line[] = "/dev/ptyXX";
+ register const char *cp1, *cp2;
+
+ for (cp1 = "pqrsPQRS"; *cp1; cp1++) {
+ line[8] = *cp1;
+ for (cp2 = "0123456789abcdefghijklmnopqrstuv"; *cp2; cp2++) {
+ line[9] = *cp2;
+ if ((master = open(line, O_RDWR, 0)) == -1) {
+ if (errno == ENOENT)
+ return (-1); /* out of ptys */
+ } else {
+ line[5] = 't';
+ /* These will fail */
+ (void) chown(line, getuid(), 0);
+ (void) chmod(line, S_IRUSR|S_IWUSR|S_IWGRP);
+#ifdef HAVE_REVOKE
+ (void) revoke(line);
+#endif
+ if ((slave = open(line, O_RDWR, 0)) != -1) {
+ *amaster = master;
+ *aslave = slave;
+ return 0;
+ }
+ (void) close(master);
+ line[5] = 'p';
+ }
+ }
+ }
+ errno = ENOENT; /* out of ptys */
+ return (-1);
+#endif
+}
+
+/*
+ * XXX This is ugly
+ * We create and bind a socket, then fork off to another
+ * process, which connects to this socket, after which we
+ * exec the wanted program. If something (strange) happens,
+ * the accept() call could block us forever.
+ *
+ * do_pty = 0 Fork/exec inetd style
+ * do_pty = 1 Fork/exec using slirp.telnetd
+ * do_ptr = 2 Fork/exec using pty
+ */
+int
+fork_exec(so, ex, do_pty)
+ struct socket *so;
+ char *ex;
+ int do_pty;
+{
+ int s;
+ struct sockaddr_in addr;
+ int addrlen = sizeof(addr);
+ int opt;
+ int master;
+ char *argv[256];
+ char buff[256];
+ /* don't want to clobber the original */
+ char *bptr;
+ char *curarg;
+ int c, i;
+
+ DEBUG_CALL("fork_exec");
+ DEBUG_ARG("so = %lx", (long)so);
+ DEBUG_ARG("ex = %lx", (long)ex);
+ DEBUG_ARG("do_pty = %lx", (long)do_pty);
+
+ if (do_pty == 2) {
+ if (openpty(&master, &s) == -1) {
+ lprint("Error: openpty failed: %s\n", strerror(errno));
+ return 0;
+ }
+ } else {
+ addr.sin_family = AF_INET;
+ addr.sin_port = 0;
+ addr.sin_addr.s_addr = INADDR_ANY;
+
+ if ((s = socket(AF_INET, SOCK_STREAM, 0)) < 0 ||
+ bind(s, (struct sockaddr *)&addr, addrlen) < 0 ||
+ listen(s, 1) < 0) {
+ lprint("Error: inet socket: %s\n", strerror(errno));
+ close(s);
+
+ return 0;
+ }
+ }
+
+ switch(fork()) {
+ case -1:
+ lprint("Error: fork failed: %s\n", strerror(errno));
+ close(s);
+ if (do_pty == 2)
+ close(master);
+ return 0;
+
+ case 0:
+ /* Set the DISPLAY */
+ if (do_pty == 2) {
+ (void) close(master);
+#ifdef TIOCSCTTY /* XXXXX */
+ (void) setsid();
+ ioctl(s, TIOCSCTTY, (char *)NULL);
+#endif
+ } else {
+ getsockname(s, (struct sockaddr *)&addr, &addrlen);
+ close(s);
+ /*
+ * Connect to the socket
+ * XXX If any of these fail, we're in trouble!
+ */
+ s = socket(AF_INET, SOCK_STREAM, 0);
+ addr.sin_addr = loopback_addr;
+ connect(s, (struct sockaddr *)&addr, addrlen);
+ }
+
+ if (x_port >= 0) {
+#ifdef HAVE_SETENV
+ sprintf(buff, "%s:%d.%d", inet_ntoa(our_addr), x_port, x_screen);
+ setenv("DISPLAY", buff, 1);
+#else
+ sprintf(buff, "DISPLAY=%s:%d.%d", inet_ntoa(our_addr), x_port, x_screen);
+ putenv(buff);
+#endif
+ }
+
+ dup2(s, 0);
+ dup2(s, 1);
+ dup2(s, 2);
+ for (s = 3; s <= 255; s++)
+ close(s);
+
+ i = 0;
+ bptr = strdup(ex); /* No need to free() this */
+ if (do_pty == 1) {
+ /* Setup "slirp.telnetd -x" */
+ argv[i++] = "slirp.telnetd";
+ argv[i++] = "-x";
+ argv[i++] = bptr;
+ } else
+ do {
+ /* Change the string into argv[] */
+ curarg = bptr;
+ while (*bptr != ' ' && *bptr != (char)0)
+ bptr++;
+ c = *bptr;
+ *bptr++ = (char)0;
+ argv[i++] = strdup(curarg);
+ } while (c);
+
+ argv[i] = 0;
+ execvp(argv[0], argv);
+
+ /* Ooops, failed, let's tell the user why */
+ {
+ char buff[256];
+
+ sprintf(buff, "Error: execvp of %s failed: %s\n",
+ argv[0], strerror(errno));
+ write(2, buff, strlen(buff)+1);
+ }
+ close(0); close(1); close(2); /* XXX */
+ exit(1);
+
+ default:
+ if (do_pty == 2) {
+ close(s);
+ so->s = master;
+ } else {
+ /*
+ * XXX this could block us...
+ * XXX Should set a timer here, and if accept() doesn't
+ * return after X seconds, declare it a failure
+ * The only reason this will block forever is if socket()
+ * of connect() fail in the child process
+ */
+ so->s = accept(s, (struct sockaddr *)&addr, &addrlen);
+ close(s);
+ opt = 1;
+ setsockopt(so->s,SOL_SOCKET,SO_REUSEADDR,(char *)&opt,sizeof(int));
+ opt = 1;
+ setsockopt(so->s,SOL_SOCKET,SO_OOBINLINE,(char *)&opt,sizeof(int));
+ }
+ fd_nonblock(so->s);
+
+ /* Append the telnet options now */
+ if (so->so_m != 0 && do_pty == 1) {
+ sbappend(so, so->so_m);
+ so->so_m = 0;
+ }
+
+ return 1;
+ }
+}
+#endif
+
+#ifndef HAVE_STRDUP
+char *
+strdup(str)
+ const char *str;
+{
+ char *bptr;
+
+ bptr = (char *)malloc(strlen(str)+1);
+ strcpy(bptr, str);
+
+ return bptr;
+}
+#endif
+
+#if 0
+void
+snooze_hup(num)
+ int num;
+{
+ int s, ret;
+#ifndef NO_UNIX_SOCKETS
+ struct sockaddr_un sock_un;
+#endif
+ struct sockaddr_in sock_in;
+ char buff[256];
+
+ ret = -1;
+ if (slirp_socket_passwd) {
+ s = socket(AF_INET, SOCK_STREAM, 0);
+ if (s < 0)
+ slirp_exit(1);
+ sock_in.sin_family = AF_INET;
+ sock_in.sin_addr.s_addr = slirp_socket_addr;
+ sock_in.sin_port = htons(slirp_socket_port);
+ if (connect(s, (struct sockaddr *)&sock_in, sizeof(sock_in)) != 0)
+ slirp_exit(1); /* just exit...*/
+ sprintf(buff, "kill %s:%d", slirp_socket_passwd, slirp_socket_unit);
+ write(s, buff, strlen(buff)+1);
+ }
+#ifndef NO_UNIX_SOCKETS
+ else {
+ s = socket(AF_UNIX, SOCK_STREAM, 0);
+ if (s < 0)
+ slirp_exit(1);
+ sock_un.sun_family = AF_UNIX;
+ strcpy(sock_un.sun_path, socket_path);
+ if (connect(s, (struct sockaddr *)&sock_un,
+ sizeof(sock_un.sun_family) + sizeof(sock_un.sun_path)) != 0)
+ slirp_exit(1);
+ sprintf(buff, "kill none:%d", slirp_socket_unit);
+ write(s, buff, strlen(buff)+1);
+ }
+#endif
+ slirp_exit(0);
+}
+
+
+void
+snooze()
+{
+ sigset_t s;
+ int i;
+
+ /* Don't need our data anymore */
+ /* XXX This makes SunOS barf */
+/* brk(0); */
+
+ /* Close all fd's */
+ for (i = 255; i >= 0; i--)
+ close(i);
+
+ signal(SIGQUIT, slirp_exit);
+ signal(SIGHUP, snooze_hup);
+ sigemptyset(&s);
+
+ /* Wait for any signal */
+ sigsuspend(&s);
+
+ /* Just in case ... */
+ exit(255);
+}
+
+void
+relay(s)
+ int s;
+{
+ char buf[8192];
+ int n;
+ fd_set readfds;
+ struct ttys *ttyp;
+
+ /* Don't need our data anymore */
+ /* XXX This makes SunOS barf */
+/* brk(0); */
+
+ signal(SIGQUIT, slirp_exit);
+ signal(SIGHUP, slirp_exit);
+ signal(SIGINT, slirp_exit);
+ signal(SIGTERM, slirp_exit);
+
+ /* Fudge to get term_raw and term_restore to work */
+ if (NULL == (ttyp = tty_attach (0, slirp_tty))) {
+ lprint ("Error: tty_attach failed in misc.c:relay()\r\n");
+ slirp_exit (1);
+ }
+ ttyp->fd = 0;
+ ttyp->flags |= TTY_CTTY;
+ term_raw(ttyp);
+
+ while (1) {
+ FD_ZERO(&readfds);
+
+ FD_SET(0, &readfds);
+ FD_SET(s, &readfds);
+
+ n = select(s+1, &readfds, (fd_set *)0, (fd_set *)0, (struct timeval *)0);
+
+ if (n <= 0)
+ slirp_exit(0);
+
+ if (FD_ISSET(0, &readfds)) {
+ n = read(0, buf, 8192);
+ if (n <= 0)
+ slirp_exit(0);
+ n = writen(s, buf, n);
+ if (n <= 0)
+ slirp_exit(0);
+ }
+
+ if (FD_ISSET(s, &readfds)) {
+ n = read(s, buf, 8192);
+ if (n <= 0)
+ slirp_exit(0);
+ n = writen(0, buf, n);
+ if (n <= 0)
+ slirp_exit(0);
+ }
+ }
+
+ /* Just in case.... */
+ exit(1);
+}
+#endif
+
+int (*lprint_print) _P((void *, const char *, va_list));
+char *lprint_ptr, *lprint_ptr2, **lprint_arg;
+
+void
+#ifdef __STDC__
+lprint(const char *format, ...)
+#else
+lprint(va_alist) va_dcl
+#endif
+{
+ va_list args;
+
+#ifdef __STDC__
+ va_start(args, format);
+#else
+ char *format;
+ va_start(args);
+ format = va_arg(args, char *);
+#endif
+#if 0
+ /* If we're printing to an sbuf, make sure there's enough room */
+ /* XXX +100? */
+ if (lprint_sb) {
+ if ((lprint_ptr - lprint_sb->sb_wptr) >=
+ (lprint_sb->sb_datalen - (strlen(format) + 100))) {
+ int deltaw = lprint_sb->sb_wptr - lprint_sb->sb_data;
+ int deltar = lprint_sb->sb_rptr - lprint_sb->sb_data;
+ int deltap = lprint_ptr - lprint_sb->sb_data;
+
+ lprint_sb->sb_data = (char *)realloc(lprint_sb->sb_data,
+ lprint_sb->sb_datalen + TCP_SNDSPACE);
+
+ /* Adjust all values */
+ lprint_sb->sb_wptr = lprint_sb->sb_data + deltaw;
+ lprint_sb->sb_rptr = lprint_sb->sb_data + deltar;
+ lprint_ptr = lprint_sb->sb_data + deltap;
+
+ lprint_sb->sb_datalen += TCP_SNDSPACE;
+ }
+ }
+#endif
+ if (lprint_print)
+ lprint_ptr += (*lprint_print)(*lprint_arg, format, args);
+
+ /* Check if they want output to be logged to file as well */
+ if (lfd) {
+ /*
+ * Remove \r's
+ * otherwise you'll get ^M all over the file
+ */
+ int len = strlen(format);
+ char *bptr1, *bptr2;
+
+ bptr1 = bptr2 = strdup(format);
+
+ while (len--) {
+ if (*bptr1 == '\r')
+ memcpy(bptr1, bptr1+1, len+1);
+ else
+ bptr1++;
+ }
+ vfprintf(lfd, bptr2, args);
+ free(bptr2);
+ }
+ va_end(args);
+}
+
+void
+add_emu(buff)
+ char *buff;
+{
+ u_int lport, fport;
+ u_int8_t tos = 0, emu = 0;
+ char buff1[256], buff2[256], buff4[128];
+ char *buff3 = buff4;
+ struct emu_t *emup;
+ struct socket *so;
+
+ if (sscanf(buff, "%256s %256s", buff2, buff1) != 2) {
+ lprint("Error: Bad arguments\r\n");
+ return;
+ }
+
+ if (sscanf(buff1, "%d:%d", &lport, &fport) != 2) {
+ lport = 0;
+ if (sscanf(buff1, "%d", &fport) != 1) {
+ lprint("Error: Bad first argument\r\n");
+ return;
+ }
+ }
+
+ if (sscanf(buff2, "%128[^:]:%128s", buff1, buff3) != 2) {
+ buff3 = 0;
+ if (sscanf(buff2, "%256s", buff1) != 1) {
+ lprint("Error: Bad second argument\r\n");
+ return;
+ }
+ }
+
+ if (buff3) {
+ if (strcmp(buff3, "lowdelay") == 0)
+ tos = IPTOS_LOWDELAY;
+ else if (strcmp(buff3, "throughput") == 0)
+ tos = IPTOS_THROUGHPUT;
+ else {
+ lprint("Error: Expecting \"lowdelay\"/\"throughput\"\r\n");
+ return;
+ }
+ }
+
+ if (strcmp(buff1, "ftp") == 0)
+ emu = EMU_FTP;
+ else if (strcmp(buff1, "irc") == 0)
+ emu = EMU_IRC;
+ else if (strcmp(buff1, "none") == 0)
+ emu = EMU_NONE; /* ie: no emulation */
+ else {
+ lprint("Error: Unknown service\r\n");
+ return;
+ }
+
+ /* First, check that it isn't already emulated */
+ for (emup = tcpemu; emup; emup = emup->next) {
+ if (emup->lport == lport && emup->fport == fport) {
+ lprint("Error: port already emulated\r\n");
+ return;
+ }
+ }
+
+ /* link it */
+ emup = (struct emu_t *)malloc(sizeof (struct emu_t));
+ emup->lport = (u_int16_t)lport;
+ emup->fport = (u_int16_t)fport;
+ emup->tos = tos;
+ emup->emu = emu;
+ emup->next = tcpemu;
+ tcpemu = emup;
+
+ /* And finally, mark all current sessions, if any, as being emulated */
+ for (so = tcb.so_next; so != &tcb; so = so->so_next) {
+ if ((lport && lport == ntohs(so->so_lport)) ||
+ (fport && fport == ntohs(so->so_fport))) {
+ if (emu)
+ so->so_emu = emu;
+ if (tos)
+ so->so_iptos = tos;
+ }
+ }
+
+ lprint("Adding emulation for %s to port %d/%d\r\n", buff1, emup->lport, emup->fport);
+}
+
+#ifdef BAD_SPRINTF
+
+#undef vsprintf
+#undef sprintf
+
+/*
+ * Some BSD-derived systems have a sprintf which returns char *
+ */
+
+int
+vsprintf_len(string, format, args)
+ char *string;
+ const char *format;
+ va_list args;
+{
+ vsprintf(string, format, args);
+ return strlen(string);
+}
+
+int
+#ifdef __STDC__
+sprintf_len(char *string, const char *format, ...)
+#else
+sprintf_len(va_alist) va_dcl
+#endif
+{
+ va_list args;
+#ifdef __STDC__
+ va_start(args, format);
+#else
+ char *string;
+ char *format;
+ va_start(args);
+ string = va_arg(args, char *);
+ format = va_arg(args, char *);
+#endif
+ vsprintf(string, format, args);
+ return strlen(string);
+}
+
+#endif
+
+void
+u_sleep(usec)
+ int usec;
+{
+ struct timeval t;
+ fd_set fdset;
+
+ FD_ZERO(&fdset);
+
+ t.tv_sec = 0;
+ t.tv_usec = usec * 1000;
+
+ select(0, &fdset, &fdset, &fdset, &t);
+}
+
+/*
+ * Set fd blocking and non-blocking
+ */
+
+void
+fd_nonblock(fd)
+ int fd;
+{
+#ifdef FIONBIO
+ int opt = 1;
+
+ ioctl(fd, FIONBIO, &opt);
+#else
+ int opt;
+
+ opt = fcntl(fd, F_GETFL, 0);
+ opt |= O_NONBLOCK;
+ fcntl(fd, F_SETFL, opt);
+#endif
+}
+
+void
+fd_block(fd)
+ int fd;
+{
+#ifdef FIONBIO
+ int opt = 0;
+
+ ioctl(fd, FIONBIO, &opt);
+#else
+ int opt;
+
+ opt = fcntl(fd, F_GETFL, 0);
+ opt &= ~O_NONBLOCK;
+ fcntl(fd, F_SETFL, opt);
+#endif
+}
+
+
+#if 0
+/*
+ * invoke RSH
+ */
+int
+rsh_exec(so,ns, user, host, args)
+ struct socket *so;
+ struct socket *ns;
+ char *user;
+ char *host;
+ char *args;
+{
+ int fd[2];
+ int fd0[2];
+ int s;
+ char buff[256];
+
+ DEBUG_CALL("rsh_exec");
+ DEBUG_ARG("so = %lx", (long)so);
+
+ if (pipe(fd)<0) {
+ lprint("Error: pipe failed: %s\n", strerror(errno));
+ return 0;
+ }
+/* #ifdef HAVE_SOCKETPAIR */
+#if 1
+ if (socketpair(PF_UNIX,SOCK_STREAM,0, fd0) == -1) {
+ close(fd[0]);
+ close(fd[1]);
+ lprint("Error: openpty failed: %s\n", strerror(errno));
+ return 0;
+ }
+#else
+ if (openpty(&fd0[0], &fd0[1]) == -1) {
+ close(fd[0]);
+ close(fd[1]);
+ lprint("Error: openpty failed: %s\n", strerror(errno));
+ return 0;
+ }
+#endif
+
+ switch(fork()) {
+ case -1:
+ lprint("Error: fork failed: %s\n", strerror(errno));
+ close(fd[0]);
+ close(fd[1]);
+ close(fd0[0]);
+ close(fd0[1]);
+ return 0;
+
+ case 0:
+ close(fd[0]);
+ close(fd0[0]);
+
+ /* Set the DISPLAY */
+ if (x_port >= 0) {
+#ifdef HAVE_SETENV
+ sprintf(buff, "%s:%d.%d", inet_ntoa(our_addr), x_port, x_screen);
+ setenv("DISPLAY", buff, 1);
+#else
+ sprintf(buff, "DISPLAY=%s:%d.%d", inet_ntoa(our_addr), x_port, x_screen);
+ putenv(buff);
+#endif
+ }
+
+ dup2(fd0[1], 0);
+ dup2(fd0[1], 1);
+ dup2(fd[1], 2);
+ for (s = 3; s <= 255; s++)
+ close(s);
+
+ execlp("rsh","rsh","-l", user, host, args, NULL);
+
+ /* Ooops, failed, let's tell the user why */
+
+ sprintf(buff, "Error: execlp of %s failed: %s\n",
+ "rsh", strerror(errno));
+ write(2, buff, strlen(buff)+1);
+ close(0); close(1); close(2); /* XXX */
+ exit(1);
+
+ default:
+ close(fd[1]);
+ close(fd0[1]);
+ ns->s=fd[0];
+ so->s=fd0[0];
+
+ return 1;
+ }
+}
+#endif
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-01 20:39:55 +0000