5 * (c) 2001 Straylight/Edgeware
8 /*----- Licensing notice --------------------------------------------------*
10 * This file is part of Trivial IP Encryption (TrIPE).
12 * TrIPE is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
17 * TrIPE is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with TrIPE; if not, write to the Free Software Foundation,
24 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
27 /*----- Header files ------------------------------------------------------*/
39 #include <sys/types.h>
46 #include <sys/socket.h>
48 #include <arpa/inet.h>
51 #include <mLib/alloc.h>
52 #include <mLib/daemonize.h>
53 #include <mLib/darray.h>
54 #include <mLib/dstr.h>
55 #include <mLib/mdwopt.h>
56 #include <mLib/quis.h>
57 #include <mLib/report.h>
59 #include <mLib/selbuf.h>
62 #include <mLib/versioncmp.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;
82 static const char *bgtag = 0;
87 #define f_spawnopts 8u
94 /*----- Main code ---------------------------------------------------------*/
96 static void reap(int sig)
99 while (waitpid(-1, 0, WNOHANG) > 0)
104 static void writelog(const char *cat, const char *msg)
108 struct tm *tm = localtime(&t);
109 strftime(buf, sizeof(buf), "%Y-%m-%d %H:%M:%S", tm);
110 fprintf(logfp, "%s %s: %s\n", buf, cat, msg);
113 static void checkbg(char **p)
115 char *q = str_getword(p);
117 die(EXIT_FAILURE, "missing background tag");
118 if (!bgtag || strcmp(bgtag, q) != 0)
119 die(EXIT_FAILURE, "unexpected background tag `%s'", q);
122 static void checkfg(void)
123 { if (bgtag) die(EXIT_FAILURE, "unexpected foreground response"); }
125 static void cline(char *p, size_t len, void *b)
130 die(EXIT_FAILURE, "server dropped the connection");
136 if (strcmp(q, "WARN") == 0) {
138 syslog(LOG_WARNING, "%s", p);
140 writelog("warning", p);
142 fprintf(stderr, "Warning: %s\n", p);
143 } else if (strcmp(q, "TRACE") == 0) {
145 syslog(LOG_DEBUG, "%s", p);
147 writelog("debug", p);
148 } else if (!(f & f_command)) {
150 syslog(LOG_ERR, "unexpected output `%s %s'", q, p);
153 dstr_putf(&d, "unexpected output `%s %s'", q, p);
154 writelog("error", d.buf);
157 } else if (strcmp(q, "FAIL") == 0) {
159 die(EXIT_FAILURE, "%s", p);
160 } else if (strcmp(q, "INFO") == 0) {
164 } else if (strcmp(q, "OK") == 0) {
167 } else if (strcmp(q, "BGDETACH") == 0) {
169 die(EXIT_FAILURE, "repeat detach");
171 } else if (strcmp(q, "BGOK") == 0) {
174 } else if (strcmp(q, "BGINFO") == 0) {
178 } else if (strcmp(q, "BGFAIL") == 0) {
180 die(EXIT_FAILURE, "%s", p);
182 die(EXIT_FAILURE, "unexpected output `%s %s'", q, p);
185 static void sline(char *p, size_t len, void *b)
189 moan("server closed the connection");
196 static void uline(char *p, size_t len, void *b)
205 if (write(fd, p, len + 1) != len + 1)
206 moan("write failed: %s", strerror(errno));
210 static void setup(const char *cmd)
219 errno = EIO; /* Relax: be vague */
220 if (write(fd, d.buf, d.len) != d.len) {
221 die(EXIT_FAILURE, "error sending setup command `%s': %s",
222 cmd, strerror(errno));
226 n = read(fd, &ch, 1);
228 die(EXIT_FAILURE, "unexpected EOF during setup");
230 die(EXIT_FAILURE, "error receiving reply to `%s': %s",
231 cmd, strerror(errno));
240 else if (strcmp(q, "OK") == 0)
242 else if (strcmp(q, "FAIL") == 0)
243 die(EXIT_FAILURE, "setup command `%s' failed: %s", cmd, p);
249 static void logfile(const char *name)
253 if ((fp = fopen(name, "a")) != 0) {
257 setvbuf(logfp, 0, _IOLBF, BUFSIZ);
260 dstr_putf(&d, "error opening logfile `%s': %s", name, strerror(errno));
262 writelog("error", d.buf);
264 die(EXIT_FAILURE, d.buf);
266 syslog(LOG_ERR, d.buf);
271 static void sighup(int sig, void *v) { logfile(logname); }
273 static void cleanup(void) { if (pidfile) unlink(pidfile); }
275 static void sigdie(int sig)
276 { cleanup(); signal(sig, SIG_DFL); raise(sig); }
278 static void putarg(string_v *av, const char *fmt, ...)
284 dstr_vputf(&d, fmt, &ap);
287 DA_UNSHIFT(av, xstrdup(d.buf));
291 static void version(FILE *fp)
292 { pquis(fp, "$, TrIPE version " VERSION "\n"); }
294 static void usage(FILE *fp)
298 $ [-w] [-OPTIONS] [COMMAND [ARGS]...]\n\
299 $ [-Dl] [-f FILE] [-OPTIONS]\n\
301 [-s] [-d DIRECTORY] [-a SOCKET] [-P PIDFILE]\n\
302 [-p PROGRAM] [-S ARG,ARG,...]\n\
306 static void help(FILE *fp)
315 -h, --help Show this help text.\n\
316 -v, --version Show version number.\n\
317 -u, --usage Show brief usage message.\n\
319 -D, --daemon Become a background task after connecting.\n\
320 -d, --directory=DIR Select current directory [default " CONFIGDIR "].\n\
321 -a, --admin-socket=FILE Select socket to connect to\n\
322 [default " SOCKETDIR "/tripesock].\n\
323 -P, --pidfile=FILE Write process-id to FILE.\n\
325 -s, --spawn Start server rather than connecting.\n\
326 -p, --spawn-path=PATH Specify path to executable.\n\
327 -S, --spawn-args=ARGS Specify comma-separated arguments.\n\
329 -l, --syslog Log messages to system log.\n\
330 -f, --logfile=FILE Log messages to FILE.\n\
331 -w, --warnings Show warnings when running commands.\n\
335 int main(int argc, char *argv[])
337 const char *dir = CONFIGDIR;
338 const char *sock = SOCKETDIR "/tripesock";
339 const char *spawnpath = "tripe";
340 string_v spawnopts = DA_INIT;
346 if ((p = getenv("TRIPEDIR")) != 0)
348 if ((p = getenv("TRIPESOCK")) != 0)
351 /* --- Parse the arguments --- */
354 static const struct option opts[] = {
355 { "help", 0, 0, 'h' },
356 { "version", 0, 0, 'v' },
357 { "usage", 0, 0, 'u' },
358 { "daemon", 0, 0, 'D' },
359 { "directory", OPTF_ARGREQ, 0, 'd' },
360 { "admin-socket", OPTF_ARGREQ, 0, 'a' },
361 { "spawn", 0, 0, 's' },
362 { "spawn-path", OPTF_ARGREQ, 0, 'p' },
363 { "spawn-args", OPTF_ARGREQ, 0, 'S' },
364 { "syslog", 0, 0, 'l' },
365 { "logfile", OPTF_ARGREQ, 0, 'f' },
366 { "warnings", 0, 0, 'w' },
367 { "pidfile", OPTF_ARGREQ, 0, 'P' },
371 int i = mdwopt(argc, argv, "+hvuDd:a:sp:S:lwf:nP:", opts, 0, 0, 0);
385 f |= f_daemon | f_noinput;
401 f |= f_spawn | f_spawnopts;
402 for (p = strtok(optarg, ","); p; p = strtok(0, ","))
403 DA_PUSH(&spawnopts, p);
406 f |= f_syslog | f_noinput;
423 if ((f & f_bogus) || ((f & f_noinput) && optind < argc)) {
428 /* --- Set various things up --- */
431 die(EXIT_FAILURE, "couldn't set `%s' as current directory: %s",
432 dir, strerror(errno));
436 if (!pidfile && (f & f_daemon) && ((f & f_syslog) || logname))
437 pidfile = "tripectl.pid";
438 if (pidfile && (pidfp = fopen(pidfile, "w")) == 0) {
439 die(EXIT_FAILURE, "couldn't open `%s' for writing: %s",
440 pidfile, strerror(errno));
442 signal(SIGINT, sigdie);
443 signal(SIGQUIT, sigdie);
444 signal(SIGTERM, sigdie);
447 /* --- Connect to the server --- */
453 sigset_t newmask, oldmask;
455 sa.sa_handler = reap;
456 sigemptyset(&sa.sa_mask);
457 sa.sa_flags = SA_NOCLDSTOP;
459 sa.sa_flags |= SA_RESTART;
461 sigaction(SIGCHLD, &sa, 0);
463 DA_PUSH(&spawnopts, 0);
464 putarg(&spawnopts, "-a%s", sock);
465 putarg(&spawnopts, "-d.");
466 putarg(&spawnopts, "-F");
467 putarg(&spawnopts, "%s", spawnpath);
468 if (socketpair(PF_UNIX, SOCK_STREAM, 0, pfd))
469 die(EXIT_FAILURE, "error from socketpair: %s", strerror(errno));
470 sigemptyset(&newmask);
471 sigaddset(&newmask, SIGCHLD);
472 sigprocmask(SIG_BLOCK, &newmask, &oldmask);
473 if ((kid = fork()) < 0)
474 die(EXIT_FAILURE, "fork failed: %s", strerror(errno));
476 dup2(pfd[1], STDIN_FILENO);
477 dup2(pfd[1], STDOUT_FILENO);
480 if (logfp) fclose(logfp);
481 if (pidfp) fclose(pidfp);
483 if (f & f_daemon) detachtty();
484 execvp(DA(&spawnopts)[0], DA(&spawnopts));
485 die(127, "couldn't exec `%s': %s", spawnpath, strerror(errno));
487 sigprocmask(SIG_SETMASK, &oldmask, 0);
491 struct sockaddr_un sun;
492 size_t sz = strlen(sock) + 1;
493 if (sz > sizeof(sun.sun_path))
494 die(EXIT_FAILURE, "socket name `%s' too long", sock);
495 memset(&sun, 0, sizeof(sun));
496 sun.sun_family = AF_UNIX;
497 memcpy(sun.sun_path, sock, sz);
498 sz = sz + offsetof(struct sockaddr_un, sun_path);
499 if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0)
500 die(EXIT_FAILURE, "error making socket: %s", strerror(errno));
501 if (connect(fd, (struct sockaddr *)&sun, sz)) {
502 die(EXIT_FAILURE, "error connecting to `%s': %s",
503 sun.sun_path, strerror(errno));
509 die(EXIT_FAILURE, "error becoming daemon: %s", strerror(errno));
512 fprintf(pidfp, "%li\n", (long)getpid());
515 signal(SIGPIPE, SIG_IGN);
517 /* --- If we're meant to be interactive, do that --- */
520 setup("WATCH -A+tw");
521 if (!(f & f_noinput) && optind == argc) {
526 selbuf_init(&bu, &sel, STDIN_FILENO, uline, &bu);
527 selbuf_init(&bs, &sel, fd, sline, &bs);
529 if (sel_select(&sel) && errno != EINTR && errno != EAGAIN)
530 die(EXIT_FAILURE, "select failed: %s", strerror(errno));
534 /* --- If there's a command, submit it --- */
538 setup((f & f_warn) ? "WATCH -A+w" : "WATCH -A");
539 while (optind < argc)
540 u_quotify(&d, argv[optind++]);
543 if (write(fd, d.buf, d.len) != d.len || shutdown(fd, 1))
544 die(EXIT_FAILURE, "write failed: %s", strerror(errno));
549 /* --- Pull everything else out of the box --- */
557 selbuf_init(&b, &sel, fd, cline, 0);
560 openlog(QUIS, 0, LOG_DAEMON);
563 sig_add(&hup, SIGHUP, sighup, 0);
566 if (sel_select(&sel) && errno != EINTR && errno != EAGAIN)
567 die(EXIT_FAILURE, "select failed: %s", strerror(errno));
574 /*----- That's all, folks -------------------------------------------------*/