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-rw-r--r--source4/heimdal/lib/roken/rkpty.c336
1 files changed, 336 insertions, 0 deletions
diff --git a/source4/heimdal/lib/roken/rkpty.c b/source4/heimdal/lib/roken/rkpty.c
new file mode 100644
index 0000000000..e29b2c5aca
--- /dev/null
+++ b/source4/heimdal/lib/roken/rkpty.c
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+/*
+ * Copyright (c) 2008 Kungliga Tekniska Högskolan
+ * (Royal Institute of Technology, Stockholm, Sweden).
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * 3. Neither the name of the Institute nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include "config.h"
+
+#ifndef HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#ifdef HAVE_SYS_WAIT_H
+#include <sys/wait.h>
+#endif
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#ifdef HAVE_PTY_H
+#include <pty.h>
+#endif
+#ifdef HAVE_UTIL_H
+#include <util.h>
+#endif
+
+#include "roken.h"
+#include <getarg.h>
+
+struct command {
+ enum { CMD_EXPECT = 0, CMD_SEND, CMD_PASSWORD } type;
+ unsigned int lineno;
+ char *str;
+ struct command *next;
+};
+
+/*
+ *
+ */
+
+static struct command *commands, **next = &commands;
+
+static sig_atomic_t alarmset = 0;
+
+static int timeout = 10;
+static int verbose;
+static int help_flag;
+static int version_flag;
+
+static int master;
+static int slave;
+static char line[256] = { 0 };
+
+static void
+caught_signal(int signo)
+{
+ alarmset = signo;
+}
+
+
+static void
+open_pty(void)
+{
+#if defined(HAVE_OPENPTY) || defined(__linux) || defined(__osf__) /* XXX */
+ if(openpty(&master, &slave, line, 0, 0) == 0)
+ return;
+#endif /* HAVE_OPENPTY .... */
+ /* more cases, like open /dev/ptmx, etc */
+
+ exit(77);
+}
+
+/*
+ *
+ */
+
+static char *
+iscmd(const char *buf, const char *s)
+{
+ size_t len = strlen(s);
+ if (strncmp(buf, s, len) != 0)
+ return NULL;
+ return estrdup(buf + len);
+}
+
+static void
+parse_configuration(const char *fn)
+{
+ struct command *c;
+ char s[1024];
+ char *str;
+ unsigned int lineno = 0;
+ FILE *cmd;
+
+ cmd = fopen(fn, "r");
+ if (cmd == NULL)
+ err(1, "open: %s", fn);
+
+ while (fgets(s, sizeof(s), cmd) != NULL) {
+
+ s[strcspn(s, "#\n")] = '\0';
+ lineno++;
+
+ c = calloc(1, sizeof(*c));
+ if (c == NULL)
+ errx(1, "malloc");
+
+ c->lineno = lineno;
+ (*next) = c;
+ next = &(c->next);
+
+ if ((str = iscmd(s, "expect ")) != NULL) {
+ c->type = CMD_EXPECT;
+ c->str = str;
+ } else if ((str = iscmd(s, "send ")) != NULL) {
+ c->type = CMD_SEND;
+ c->str = str;
+ } else if ((str = iscmd(s, "password ")) != NULL) {
+ c->type = CMD_PASSWORD;
+ c->str = str;
+ } else
+ errx(1, "Invalid command on line %d: %s", lineno, s);
+ }
+
+ fclose(cmd);
+}
+
+
+/*
+ *
+ */
+
+static int
+eval_parent(pid_t pid)
+{
+ struct command *c;
+ char in;
+ size_t len = 0;
+ ssize_t sret;
+
+ for (c = commands; c != NULL; c = c->next) {
+ switch(c->type) {
+ case CMD_EXPECT:
+ if (verbose)
+ printf("[expecting %s]", c->str);
+ len = 0;
+ alarm(timeout);
+ while((sret = read(master, &in, sizeof(in))) > 0) {
+ alarm(timeout);
+ printf("%c", in);
+ if (c->str[len] != in) {
+ len = 0;
+ continue;
+ }
+ len++;
+ if (c->str[len] == '\0')
+ break;
+ }
+ alarm(0);
+ if (alarmset == SIGALRM)
+ errx(1, "timeout waiting for %s (line %u)",
+ c->str, c->lineno);
+ else if (alarmset)
+ errx(1, "got a signal %d waiting for %s (line %u)",
+ alarmset, c->str, c->lineno);
+ if (sret <= 0)
+ errx(1, "end command while waiting for %s (line %u)",
+ c->str, c->lineno);
+ break;
+ case CMD_SEND:
+ case CMD_PASSWORD: {
+ size_t i = 0;
+ const char *msg = (c->type == CMD_PASSWORD) ? "****" : c->str;
+
+ if (verbose)
+ printf("[send %s]", msg);
+
+ len = strlen(c->str);
+
+ while (i < len) {
+ if (c->str[i] == '\\' && i < len - 1) {
+ char ctrl;
+ i++;
+ switch(c->str[i]) {
+ case 'n': ctrl = '\n'; break;
+ case 'r': ctrl = '\r'; break;
+ case 't': ctrl = '\t'; break;
+ default:
+ errx(1, "unknown control char %c (line %u)",
+ c->str[i], c->lineno);
+ }
+ if (net_write(master, &ctrl, 1) != 1)
+ errx(1, "command refused input (line %u)", c->lineno);
+ } else {
+ if (net_write(master, &c->str[i], 1) != 1)
+ errx(1, "command refused input (line %u)", c->lineno);
+ }
+ i++;
+ }
+ break;
+ }
+ default:
+ abort();
+ }
+ }
+ while(read(master, &in, sizeof(in)) > 0)
+ printf("%c", in);
+
+ if (verbose)
+ printf("[end of program]\n");
+
+ /*
+ * Fetch status from child
+ */
+ {
+ int ret, status;
+
+ ret = waitpid(pid, &status, 0);
+ if (ret == -1)
+ err(1, "waitpid");
+ if (WIFEXITED(status) && WEXITSTATUS(status))
+ return WEXITSTATUS(status);
+ else if (WIFSIGNALED(status)) {
+ printf("killed by signal: %d\n", WTERMSIG(status));
+ return 1;
+ }
+ }
+ return 0;
+}
+
+/*
+ *
+ */
+
+static struct getargs args[] = {
+ { "timeout", 't', arg_integer, &timeout, "timout", "seconds" },
+ { "verbose", 'v', arg_counter, &verbose, "verbose debugging" },
+ { "version", 0, arg_flag, &version_flag, "print version" },
+ { "help", 0, arg_flag, &help_flag, NULL }
+};
+
+static void
+usage(int ret)
+{
+ arg_printusage (args, sizeof(args)/sizeof(*args), NULL, "infile command..");
+ exit (ret);
+}
+
+int
+main(int argc, char **argv)
+{
+ int optidx = 0;
+ pid_t pid;
+
+ setprogname(argv[0]);
+
+ if(getarg(args, sizeof(args) / sizeof(args[0]), argc, argv, &optidx))
+ usage(1);
+
+ if (help_flag)
+ usage (0);
+
+ if (version_flag) {
+ fprintf (stderr, "%s from %s-%s\n", getprogname(), PACKAGE, VERSION);
+ return 0;
+ }
+
+ argv += optidx;
+ argc -= optidx;
+
+ if (argc < 2)
+ usage(1);
+
+ parse_configuration(argv[0]);
+
+ argv += 1;
+ argc -= 1;
+
+ open_pty();
+
+ pid = fork();
+ switch (pid) {
+ case -1:
+ err(1, "Failed to fork");
+ case 0:
+
+ if(setsid()<0)
+ err(1, "setsid");
+
+ dup2(slave, STDIN_FILENO);
+ dup2(slave, STDOUT_FILENO);
+ dup2(slave, STDERR_FILENO);
+ closefrom(STDERR_FILENO + 1);
+
+ execvp(argv[0], argv); /* add NULL to end of array ? */
+ err(1, "Failed to exec: %s", argv[0]);
+ default:
+ close(slave);
+ {
+ struct sigaction sa;
+
+ sa.sa_handler = caught_signal;
+ sa.sa_flags = 0;
+ sigemptyset (&sa.sa_mask);
+
+ sigaction(SIGALRM, &sa, NULL);
+ }
+
+ return eval_parent(pid);
+ }
+}
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