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 /*----- Header files ------------------------------------------------------*/
41 #include <sys/types.h>
48 #include <sys/socket.h>
50 #include <arpa/inet.h>
53 #include <mLib/alloc.h>
54 #include <mLib/darray.h>
55 #include <mLib/dstr.h>
56 #include <mLib/mdwopt.h>
57 #include <mLib/quis.h>
58 #include <mLib/report.h>
60 #include <mLib/selbuf.h>
68 /*----- Data structures ---------------------------------------------------*/
72 DA_DECL(string_v, char *);
75 /*----- Static variables --------------------------------------------------*/
77 static const char *pidfile = 0;
78 static const char *logname = 0;
79 static FILE *logfp = 0;
80 static unsigned f = 0;
86 #define f_spawnopts 8u
93 /*----- Main code ---------------------------------------------------------*/
95 static void reap(int sig)
98 while (waitpid(-1, 0, WNOHANG) > 0)
103 static void writelog(const char *cat, const char *msg)
107 struct tm *tm = localtime(&t);
108 strftime(buf, sizeof(buf), "%Y-%m-%d %H:%M:%S", tm);
109 fprintf(logfp, "%s %s: %s\n", buf, cat, msg);
112 static void cline(char *p, size_t len, void *b)
117 die(EXIT_FAILURE, "server dropped the connection");
123 if (strcmp(q, "WARN") == 0) {
125 syslog(LOG_WARNING, "%s", p);
127 writelog("warning", p);
129 fprintf(stderr, "Warning: %s\n", p);
130 } else if (strcmp(q, "TRACE") == 0) {
132 syslog(LOG_DEBUG, "%s", p);
134 writelog("debug", p);
135 } else if (!(f & f_command)) {
137 syslog(LOG_ERR, "unexpected output `%s %s'", q, p);
140 dstr_putf(&d, "unexpected output `%s %s'", q, p);
141 writelog("error", d.buf);
144 } else if (strcmp(q, "FAIL") == 0)
145 die(EXIT_FAILURE, "%s", p);
146 else if (strcmp(q, "INFO") == 0)
148 else if (strcmp(q, "OK") == 0)
151 die(EXIT_FAILURE, "unexpected output `%s %s'", q, p);
154 static void sline(char *p, size_t len, void *b)
158 moan("server closed the connection");
164 static void uline(char *p, size_t len, void *b)
173 if (write(fd, p, len + 1) != len + 1)
174 moan("write failed: %s", strerror(errno));
178 static void setup(const char *cmd)
187 errno = EIO; /* Relax: be vague */
188 if (write(fd, d.buf, d.len) != d.len) {
189 die(EXIT_FAILURE, "error sending setup command `%s': %s",
190 cmd, strerror(errno));
194 n = read(fd, &ch, 1);
196 die(EXIT_FAILURE, "unexpected EOF during setup");
198 die(EXIT_FAILURE, "error receiving reply to `%s': %s",
199 cmd, strerror(errno));
208 else if (strcmp(q, "OK") == 0)
210 else if (strcmp(q, "FAIL") == 0)
211 die(EXIT_FAILURE, "setup command `%s' failed: %s", cmd, p);
217 static void logfile(const char *name)
221 if ((fp = fopen(name, "a")) != 0) {
225 setvbuf(logfp, 0, _IOLBF, BUFSIZ);
228 dstr_putf(&d, "error opening logfile `%s': %s", name, strerror(errno));
230 writelog("error", d.buf);
232 die(EXIT_FAILURE, d.buf);
234 syslog(LOG_ERR, d.buf);
239 static void sighup(int sig, void *v)
244 static void cleanup(void)
250 static void sigdie(int sig)
253 signal(sig, SIG_DFL);
257 static void version(FILE *fp)
259 pquis(fp, "$, TrIPE version " VERSION "\n");
262 static void usage(FILE *fp)
266 $ [-w] [-OPTIONS] [COMMAND [ARGS]...]\n\
267 $ [-Dl] [-f FILE] [-OPTIONS]\n\
269 [-s] [-d DIRECTORY] [-a SOCKET] [-P PIDFILE]\n\
270 [-p PROGRAM] [-S ARG,ARG,...]\n\
274 static void help(FILE *fp)
283 -h, --help Show this help text.\n\
284 -v, --version Show version number.\n\
285 -u, --usage Show brief usage message.\n\
287 -D, --daemon Become a background task after connecting.\n\
288 -d, --directory=DIR Select current directory [default " CONFIGDIR "].\n\
289 -a, --admin-socket=FILE Select socket to connect to\n\
290 [default " SOCKETDIR "/tripesock].\n\
291 -P, --pidfile=FILE Write process-id to FILE.\n\
293 -s, --spawn Start server rather than connecting.\n\
294 -p, --spawn-path=PATH Specify path to executable.\n\
295 -S, --spawn-args=ARGS Specify comma-separated arguments.\n\
297 -l, --syslog Log messages to system log.\n\
298 -f, --logfile=FILE Log messages to FILE.\n\
299 -w, --warnings Show warnings when running commands.\n\
303 int main(int argc, char *argv[])
305 const char *dir = CONFIGDIR;
306 const char *sock = SOCKETDIR "/tripesock";
307 const char *spawnpath = "tripe";
308 string_v spawnopts = DA_INIT;
314 if ((p = getenv("TRIPEDIR")) != 0)
317 /* --- Parse the arguments --- */
320 static const struct option opts[] = {
321 { "help", 0, 0, 'h' },
322 { "version", 0, 0, 'v' },
323 { "usage", 0, 0, 'u' },
324 { "daemon", 0, 0, 'D' },
325 { "directory", OPTF_ARGREQ, 0, 'd' },
326 { "admin-socket", OPTF_ARGREQ, 0, 'a' },
327 { "spawn", 0, 0, 's' },
328 { "spawn-path", OPTF_ARGREQ, 0, 'p' },
329 { "spawn-args", OPTF_ARGREQ, 0, 'S' },
330 { "syslog", 0, 0, 'l' },
331 { "logfile", OPTF_ARGREQ, 0, 'f' },
332 { "warnings", 0, 0, 'w' },
333 { "pidfile", OPTF_ARGREQ, 0, 'P' },
337 int i = mdwopt(argc, argv, "+hvuDd:a:sp:S:lwf:nP:", opts, 0, 0, 0);
351 f |= f_daemon | f_noinput;
367 f |= f_spawn | f_spawnopts;
368 for (p = strtok(optarg, ","); p; p = strtok(0, ","))
369 DA_PUSH(&spawnopts, p);
372 f |= f_syslog | f_noinput;
389 if ((f & f_bogus) || ((f & f_noinput) && optind < argc)) {
394 /* --- Set various things up --- */
397 die(EXIT_FAILURE, "couldn't set `%s' as current directory: %s",
398 dir, strerror(errno));
402 if (!pidfile && (f & f_daemon) && ((f & f_syslog) || logname))
403 pidfile = "tripectl.pid";
404 if (pidfile && (pidfp = fopen(pidfile, "w")) == 0) {
405 die(EXIT_FAILURE, "couldn't open `%s' for writing: %s",
406 pidfile, strerror(errno));
408 signal(SIGINT, sigdie);
409 signal(SIGQUIT, sigdie);
410 signal(SIGTERM, sigdie);
413 /* --- Connect to the server --- */
419 sigset_t newmask, oldmask;
421 sa.sa_handler = reap;
422 sigemptyset(&sa.sa_mask);
423 sa.sa_flags = SA_NOCLDSTOP;
425 sa.sa_flags |= SA_RESTART;
427 sigaction(SIGCHLD, &sa, 0);
429 DA_UNSHIFT(&spawnopts, (char *)sock);
430 DA_UNSHIFT(&spawnopts, "-a");
431 DA_UNSHIFT(&spawnopts, "-d.");
432 DA_UNSHIFT(&spawnopts, (char *)spawnpath);
433 DA_PUSH(&spawnopts, 0);
434 if (socketpair(PF_UNIX, SOCK_STREAM, 0, pfd))
435 die(EXIT_FAILURE, "error from socketpair: %s", strerror(errno));
436 sigemptyset(&newmask);
437 sigaddset(&newmask, SIGCHLD);
438 sigprocmask(SIG_BLOCK, &newmask, &oldmask);
439 if ((kid = fork()) < 0)
440 die(EXIT_FAILURE, "fork failed: %s", strerror(errno));
442 dup2(pfd[1], STDIN_FILENO);
443 dup2(pfd[1], STDOUT_FILENO);
453 execvp(DA(&spawnopts)[0], DA(&spawnopts));
454 die(127, "couldn't exec `%s': %s", spawnpath, strerror(errno));
456 sigprocmask(SIG_SETMASK, &oldmask, 0);
460 struct sockaddr_un sun;
461 size_t sz = strlen(sock) + 1;
462 if (sz > sizeof(sun.sun_path))
463 die(EXIT_FAILURE, "socket name `%s' too long", sock);
464 memset(&sun, 0, sizeof(sun));
465 sun.sun_family = AF_UNIX;
466 memcpy(sun.sun_path, sock, sz);
467 sz = sz + offsetof(struct sockaddr_un, sun_path);
468 if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0)
469 die(EXIT_FAILURE, "error making socket: %s", strerror(errno));
470 if (connect(fd, (struct sockaddr *)&sun, sz)) {
471 die(EXIT_FAILURE, "error connecting to `%s': %s",
472 sun.sun_path, strerror(errno));
478 die(EXIT_FAILURE, "error becoming daemon: %s", strerror(errno));
481 fprintf(pidfp, "%li\n", (long)getpid());
484 signal(SIGPIPE, SIG_IGN);
486 /* --- If we're meant to be interactive, do that --- */
489 setup("WATCH -A+tw");
490 if (!(f & f_noinput) && optind == argc) {
495 selbuf_init(&bu, &sel, STDIN_FILENO, uline, &bu);
496 selbuf_init(&bs, &sel, fd, sline, &bs);
498 if (sel_select(&sel) && errno != EINTR && errno != EAGAIN)
499 die(EXIT_FAILURE, "select failed: %s", strerror(errno));
503 /* --- If there's a command, submit it --- */
507 setup((f & f_warn) ? "WATCH -A+w" : "WATCH -A");
508 dstr_puts(&d, argv[optind++]);
509 while (optind < argc) {
511 dstr_puts(&d, argv[optind++]);
515 if (write(fd, d.buf, d.len) != d.len || shutdown(fd, 1))
516 die(EXIT_FAILURE, "write failed: %s", strerror(errno));
521 /* --- Pull everything else out of the box --- */
529 selbuf_init(&b, &sel, fd, cline, 0);
532 openlog(QUIS, 0, LOG_DAEMON);
535 sig_add(&hup, SIGHUP, sighup, 0);
538 if (sel_select(&sel) && errno != EINTR && errno != EAGAIN)
539 die(EXIT_FAILURE, "select failed: %s", strerror(errno));
546 /*----- That's all, folks -------------------------------------------------*/