3 * $Id: client.c,v 1.1 2001/02/03 20:26:37 mdw Exp $
7 * (c) 2001 Straylight/Edgeware
10 /*----- Licensing notice --------------------------------------------------*
12 * This file is part of Trivial IP Encryption (TrIPE).
14 * TrIPE is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2 of the License, or
17 * (at your option) any later version.
19 * TrIPE is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
24 * You should have received a copy of the GNU General Public License
25 * along with TrIPE; if not, write to the Free Software Foundation,
26 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
29 /*----- Revision history --------------------------------------------------*
32 * Revision 1.1 2001/02/03 20:26:37 mdw
37 /*----- Header files ------------------------------------------------------*/
47 #include <sys/types.h>
54 #include <sys/socket.h>
56 #include <arpa/inet.h>
59 #include <mLib/alloc.h>
60 #include <mLib/darray.h>
61 #include <mLib/dstr.h>
62 #include <mLib/lbuf.h>
63 #include <mLib/mdwopt.h>
64 #include <mLib/quis.h>
65 #include <mLib/report.h>
67 #include <mLib/selbuf.h>
74 /*----- Data structures ---------------------------------------------------*/
78 DA_DECL(string_v, char *);
81 /*----- Static variables --------------------------------------------------*/
83 static FILE *logfp = 0;
84 static unsigned f = 0;
90 #define f_spawnopts 8u
97 /*----- Main code ---------------------------------------------------------*/
99 static void reap(int sig)
103 while (waitpid(-1, &s, WNOHANG) > 0)
108 static void writelog(const char *cat, const char *msg)
112 struct tm *tm = localtime(&t);
113 strftime(buf, sizeof(buf), "%Y-%m-%d %H:%M:%S", tm);
114 fprintf(logfp, "%s %s: %s\n", buf, cat, msg);
117 static void cline(char *p, void *b)
122 die(EXIT_FAILURE, "server dropped the connection");
128 if (strcmp(q, "WARN") == 0) {
130 syslog(LOG_WARNING, "%s", p);
132 writelog("warning", p);
134 fprintf(stderr, "Warning: %s\n", p);
135 } else if (strcmp(q, "TRACE") == 0) {
137 syslog(LOG_DEBUG, "%s", p);
139 writelog("debug", p);
140 } else if (!(f & f_command)) {
142 syslog(LOG_ERR, "unexpected output `%s %s'", q, p);
145 dstr_putf(&d, "unexpected output `%s %s'", q, p);
146 writelog("error", d.buf);
149 } else if (strcmp(q, "ERR") == 0)
150 die(EXIT_FAILURE, "%s", p);
151 else if (strcmp(q, "INFO") == 0)
153 else if (strcmp(q, "OK") == 0)
156 die(EXIT_FAILURE, "unexpected output `%s %s'", q, p);
159 static void sline(char *p, void *b)
163 moan("server closed the connection");
169 static void uline(char *p, void *b)
179 write(fd, p, sz + 1);
183 static void version(FILE *fp)
185 pquis(fp, "$, TrIPE version " VERSION "\n");
188 static void usage(FILE *fp)
192 $ [-w] [-options] [command [args]...]\n\
193 $ [-Dl] [-f file] [-options]\n\
195 [-s] [-d directory] [-a socket] [-p program] [-S arg,arg,...]\n\
199 static void help(FILE *fp)
208 -h, --help Show this help text.\n\
209 -v, --version Show version number.\n\
210 -u, --usage Show brief usage message.\n\
212 -D, --daemon Become a background task after connecting.\n\
213 -d, --directory=DIR Select current directory [default /var/lib/tripe]\n\
214 -a, --admin-socket=FILE Select socket to connect to.\n\
216 -s, --spawn Start server rather than connecting.\n\
217 -p, --spawn-path=PATH Specify path to executable.\n\
218 -S, --spawn-args=ARGS Specify comma-separated arguments.\n\
220 -l, --syslog Log messages to system log.\n\
221 -f, --logfile=FILE Log messages to FILE.\n\
222 -w, --warnings Show warnings when running commands.\n\
226 int main(int argc, char *argv[])
228 const char *dir = "/var/lib/tripe";
229 const char *sock = "tripesock";
230 const char *spawnpath = "tripe";
231 string_v spawnopts = DA_INIT;
236 if ((p = getenv("TRIPEDIR")) != 0)
239 /* --- Parse the arguments --- */
242 static const struct option opts[] = {
243 { "help", 0, 0, 'h' },
244 { "version", 0, 0, 'v' },
245 { "usage", 0, 0, 'u' },
246 { "daemon", 0, 0, 'D' },
247 { "directory", OPTF_ARGREQ, 0, 'd' },
248 { "admin-socket", OPTF_ARGREQ, 0, 'a' },
249 { "spawn", 0, 0, 's' },
250 { "spawn-path", OPTF_ARGREQ, 0, 'p' },
251 { "spawn-args", OPTF_ARGREQ, 0, 'S' },
252 { "syslog", 0, 0, 'l' },
253 { "logfile", OPTF_ARGREQ, 0, 'f' },
254 { "warnings", 0, 0, 'w' },
258 int i = mdwopt(argc, argv, "hvuDd:a:sp:S:lwf:n", opts, 0, 0, 0);
272 f |= f_daemon | f_noinput;
288 f |= f_spawn | f_spawnopts;
289 for (p = strtok(optarg, ","); p; p = strtok(0, ","))
290 DA_PUSH(&spawnopts, p);
293 f |= f_syslog | f_noinput;
301 if ((logfp = fopen(optarg, "a")) == 0) {
302 die(EXIT_FAILURE, "error opening logfile `%s': %s",
303 optarg, strerror(errno));
312 if ((f & f_bogus) || ((f & f_noinput) && optind < argc)) {
317 /* --- Set the world up --- */
320 die(EXIT_FAILURE, "couldn't set current directory to `%s': %s",
321 dir, strerror(errno));
324 /* --- Connect to the server --- */
330 sigset_t newmask, oldmask;
332 sa.sa_handler = reap;
333 sigemptyset(&sa.sa_mask);
334 sa.sa_flags = SA_NOCLDSTOP;
336 sa.sa_flags |= SA_RESTART;
338 sigaction(SIGCHLD, &sa, 0);
340 DA_UNSHIFT(&spawnopts, (char *)spawnpath);
341 if (!(f & f_spawnopts)) {
342 DA_PUSH(&spawnopts, "-d.");
343 DA_PUSH(&spawnopts, "-a");
344 DA_PUSH(&spawnopts, (char *)sock);
346 DA_PUSH(&spawnopts, 0);
347 if (socketpair(PF_UNIX, SOCK_STREAM, 0, pfd))
348 die(EXIT_FAILURE, "error from socketpair: %s", strerror(errno));
349 sigemptyset(&newmask);
350 sigaddset(&newmask, SIGCHLD);
351 sigprocmask(SIG_BLOCK, &newmask, &oldmask);
352 if ((kid = fork()) < 0)
353 die(EXIT_FAILURE, "fork failed: %s", strerror(errno));
355 dup2(pfd[1], STDIN_FILENO);
356 dup2(pfd[1], STDOUT_FILENO);
359 execvp(DA(&spawnopts)[0], DA(&spawnopts));
360 die(127, "couldn't exec `%s': %s", spawnpath, strerror(errno));
362 sigprocmask(SIG_SETMASK, &oldmask, 0);
366 struct sockaddr_un sun;
367 size_t sz = strlen(sock) + 1;
368 if (sz > sizeof(sun.sun_path))
369 die(EXIT_FAILURE, "socket name `%s' too long", sock);
370 memset(&sun, 0, sizeof(sun));
371 sun.sun_family = AF_UNIX;
372 memcpy(sun.sun_path, sock, sz);
373 sz += offsetof(struct sockaddr_un, sun_path);
374 if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0)
375 die(EXIT_FAILURE, "error making socket: %s", strerror(errno));
376 if (connect(fd, (struct sockaddr *)&sun, sz)) {
377 die(EXIT_FAILURE, "error connecting to `%s': %s",
378 sock, strerror(errno));
384 die(EXIT_FAILURE, "error becoming daemon: %s", strerror(errno));
387 /* --- If we're meant to be interactive, do that --- */
389 if (!(f & f_noinput) && optind == argc) {
394 selbuf_init(&bu, &sel, STDIN_FILENO, uline, &bu);
395 selbuf_init(&bs, &sel, fd, sline, &bs);
397 if (sel_select(&sel))
398 die(EXIT_FAILURE, "select failed: %s", strerror(errno));
402 /* --- If there's a command, submit it --- */
406 dstr_puts(&d, argv[optind++]);
407 while (optind < argc) {
409 dstr_puts(&d, argv[optind++]);
412 write(fd, d.buf, d.len);
418 /* --- Pull everything else out of the box --- */
422 lbuf_init(&b, cline, 0);
424 openlog(QUIS, 0, LOG_DAEMON);
426 size_t sz = lbuf_free(&b, &p);
427 ssize_t n = read(fd, p, sz);
429 die(EXIT_FAILURE, "read failed: %s", strerror(errno));
432 lbuf_flush(&b, p, n);
440 /*----- That's all, folks -------------------------------------------------*/