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/daemonize.h>
55 #include <mLib/darray.h>
56 #include <mLib/dstr.h>
57 #include <mLib/mdwopt.h>
58 #include <mLib/quis.h>
59 #include <mLib/report.h>
61 #include <mLib/selbuf.h>
64 #include <mLib/versioncmp.h>
70 /*----- Data structures ---------------------------------------------------*/
74 DA_DECL(string_v, char *);
77 /*----- Static variables --------------------------------------------------*/
79 static const char *pidfile = 0;
80 static const char *logname = 0;
81 static FILE *logfp = 0;
82 static unsigned f = 0;
84 static const char *bgtag = 0;
89 #define f_spawnopts 8u
96 /*----- Main code ---------------------------------------------------------*/
98 static void reap(int sig)
101 while (waitpid(-1, 0, WNOHANG) > 0)
106 static void writelog(const char *cat, const char *msg)
110 struct tm *tm = localtime(&t);
111 strftime(buf, sizeof(buf), "%Y-%m-%d %H:%M:%S", tm);
112 fprintf(logfp, "%s %s: %s\n", buf, cat, msg);
115 static void checkbg(char **p)
117 char *q = str_getword(p);
119 die(EXIT_FAILURE, "missing background tag");
120 if (!bgtag || strcmp(bgtag, q) != 0)
121 die(EXIT_FAILURE, "unexpected background tag `%s'", q);
124 static void checkfg(void)
127 die(EXIT_FAILURE, "unexpected foreground response");
130 static void cline(char *p, size_t len, void *b)
135 die(EXIT_FAILURE, "server dropped the connection");
141 if (strcmp(q, "WARN") == 0) {
143 syslog(LOG_WARNING, "%s", p);
145 writelog("warning", p);
147 fprintf(stderr, "Warning: %s\n", p);
148 } else if (strcmp(q, "TRACE") == 0) {
150 syslog(LOG_DEBUG, "%s", p);
152 writelog("debug", p);
153 } else if (!(f & f_command)) {
155 syslog(LOG_ERR, "unexpected output `%s %s'", q, p);
158 dstr_putf(&d, "unexpected output `%s %s'", q, p);
159 writelog("error", d.buf);
162 } else if (strcmp(q, "FAIL") == 0) {
164 die(EXIT_FAILURE, "%s", p);
165 } else if (strcmp(q, "INFO") == 0) {
169 } else if (strcmp(q, "OK") == 0) {
172 } else if (strcmp(q, "BGDETACH") == 0) {
174 die(EXIT_FAILURE, "repeat detach");
176 } else if (strcmp(q, "BGOK") == 0) {
179 } else if (strcmp(q, "BGINFO") == 0) {
183 } else if (strcmp(q, "BGFAIL") == 0) {
185 die(EXIT_FAILURE, "%s", p);
187 die(EXIT_FAILURE, "unexpected output `%s %s'", q, p);
190 static void sline(char *p, size_t len, void *b)
194 moan("server closed the connection");
201 static void uline(char *p, size_t len, void *b)
210 if (write(fd, p, len + 1) != len + 1)
211 moan("write failed: %s", strerror(errno));
215 static void setup(const char *cmd)
224 errno = EIO; /* Relax: be vague */
225 if (write(fd, d.buf, d.len) != d.len) {
226 die(EXIT_FAILURE, "error sending setup command `%s': %s",
227 cmd, strerror(errno));
231 n = read(fd, &ch, 1);
233 die(EXIT_FAILURE, "unexpected EOF during setup");
235 die(EXIT_FAILURE, "error receiving reply to `%s': %s",
236 cmd, strerror(errno));
245 else if (strcmp(q, "OK") == 0)
247 else if (strcmp(q, "FAIL") == 0)
248 die(EXIT_FAILURE, "setup command `%s' failed: %s", cmd, p);
254 static void logfile(const char *name)
258 if ((fp = fopen(name, "a")) != 0) {
262 setvbuf(logfp, 0, _IOLBF, BUFSIZ);
265 dstr_putf(&d, "error opening logfile `%s': %s", name, strerror(errno));
267 writelog("error", d.buf);
269 die(EXIT_FAILURE, d.buf);
271 syslog(LOG_ERR, d.buf);
276 static void sighup(int sig, void *v) { logfile(logname); }
278 static void cleanup(void)
284 static void sigdie(int sig)
287 signal(sig, SIG_DFL);
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_UNSHIFT(&spawnopts, (char *)sock);
464 DA_UNSHIFT(&spawnopts, "-a");
465 DA_UNSHIFT(&spawnopts, "-d.");
466 DA_UNSHIFT(&spawnopts, (char *)spawnpath);
467 DA_PUSH(&spawnopts, 0);
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);
487 execvp(DA(&spawnopts)[0], DA(&spawnopts));
488 die(127, "couldn't exec `%s': %s", spawnpath, strerror(errno));
490 sigprocmask(SIG_SETMASK, &oldmask, 0);
494 struct sockaddr_un sun;
495 size_t sz = strlen(sock) + 1;
496 if (sz > sizeof(sun.sun_path))
497 die(EXIT_FAILURE, "socket name `%s' too long", sock);
498 memset(&sun, 0, sizeof(sun));
499 sun.sun_family = AF_UNIX;
500 memcpy(sun.sun_path, sock, sz);
501 sz = sz + offsetof(struct sockaddr_un, sun_path);
502 if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0)
503 die(EXIT_FAILURE, "error making socket: %s", strerror(errno));
504 if (connect(fd, (struct sockaddr *)&sun, sz)) {
505 die(EXIT_FAILURE, "error connecting to `%s': %s",
506 sun.sun_path, strerror(errno));
512 die(EXIT_FAILURE, "error becoming daemon: %s", strerror(errno));
515 fprintf(pidfp, "%li\n", (long)getpid());
518 signal(SIGPIPE, SIG_IGN);
520 /* --- If we're meant to be interactive, do that --- */
523 setup("WATCH -A+tw");
524 if (!(f & f_noinput) && optind == argc) {
529 selbuf_init(&bu, &sel, STDIN_FILENO, uline, &bu);
530 selbuf_init(&bs, &sel, fd, sline, &bs);
532 if (sel_select(&sel) && errno != EINTR && errno != EAGAIN)
533 die(EXIT_FAILURE, "select failed: %s", strerror(errno));
537 /* --- If there's a command, submit it --- */
541 setup((f & f_warn) ? "WATCH -A+w" : "WATCH -A");
542 while (optind < argc)
543 u_quotify(&d, argv[optind++]);
546 if (write(fd, d.buf, d.len) != d.len || shutdown(fd, 1))
547 die(EXIT_FAILURE, "write failed: %s", strerror(errno));
552 /* --- Pull everything else out of the box --- */
560 selbuf_init(&b, &sel, fd, cline, 0);
563 openlog(QUIS, 0, LOG_DAEMON);
566 sig_add(&hup, SIGHUP, sighup, 0);
569 if (sel_select(&sel) && errno != EINTR && errno != EAGAIN)
570 die(EXIT_FAILURE, "select failed: %s", strerror(errno));
577 /*----- That's all, folks -------------------------------------------------*/