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, "%s", 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 version(FILE *fp)
279 { pquis(fp, "$, TrIPE version " VERSION "\n"); }
281 static void usage(FILE *fp)
285 $ [-w] [-OPTIONS] [COMMAND [ARGS]...]\n\
286 $ [-Dl] [-f FILE] [-OPTIONS]\n\
288 [-s] [-d DIRECTORY] [-a SOCKET] [-P PIDFILE]\n\
289 [-p PROGRAM] [-S ARG,ARG,...]\n\
293 static void help(FILE *fp)
302 -h, --help Show this help text.\n\
303 -v, --version Show version number.\n\
304 -u, --usage Show brief usage message.\n\
306 -D, --daemon Become a background task after connecting.\n\
307 -d, --directory=DIR Select current directory [default " CONFIGDIR "].\n\
308 -a, --admin-socket=FILE Select socket to connect to\n\
309 [default " SOCKETDIR "/tripesock].\n\
310 -P, --pidfile=FILE Write process-id to FILE.\n\
312 -s, --spawn Start server rather than connecting.\n\
313 -p, --spawn-path=PATH Specify path to executable.\n\
314 -S, --spawn-args=ARGS Specify comma-separated arguments.\n\
316 -l, --syslog Log messages to system log.\n\
317 -f, --logfile=FILE Log messages to FILE.\n\
318 -w, --warnings Show warnings when running commands.\n\
322 int main(int argc, char *argv[])
324 const char *dir = CONFIGDIR;
325 const char *sock = SOCKETDIR "/tripesock";
326 const char *spawnpath = "tripe";
327 string_v spawnopts = DA_INIT;
333 if ((p = getenv("TRIPEDIR")) != 0)
335 if ((p = getenv("TRIPESOCK")) != 0)
338 /* --- Parse the arguments --- */
341 static const struct option opts[] = {
342 { "help", 0, 0, 'h' },
343 { "version", 0, 0, 'v' },
344 { "usage", 0, 0, 'u' },
345 { "daemon", 0, 0, 'D' },
346 { "directory", OPTF_ARGREQ, 0, 'd' },
347 { "admin-socket", OPTF_ARGREQ, 0, 'a' },
348 { "spawn", 0, 0, 's' },
349 { "spawn-path", OPTF_ARGREQ, 0, 'p' },
350 { "spawn-args", OPTF_ARGREQ, 0, 'S' },
351 { "syslog", 0, 0, 'l' },
352 { "logfile", OPTF_ARGREQ, 0, 'f' },
353 { "warnings", 0, 0, 'w' },
354 { "pidfile", OPTF_ARGREQ, 0, 'P' },
358 int i = mdwopt(argc, argv, "+hvuDd:a:sp:S:lwf:nP:", opts, 0, 0, 0);
372 f |= f_daemon | f_noinput;
388 f |= f_spawn | f_spawnopts;
389 for (p = strtok(optarg, ","); p; p = strtok(0, ","))
390 DA_PUSH(&spawnopts, p);
393 f |= f_syslog | f_noinput;
410 if ((f & f_bogus) || ((f & f_noinput) && optind < argc)) {
415 /* --- Set various things up --- */
418 die(EXIT_FAILURE, "couldn't set `%s' as current directory: %s",
419 dir, strerror(errno));
423 if (!pidfile && (f & f_daemon) && ((f & f_syslog) || logname))
424 pidfile = "tripectl.pid";
425 if (pidfile && (pidfp = fopen(pidfile, "w")) == 0) {
426 die(EXIT_FAILURE, "couldn't open `%s' for writing: %s",
427 pidfile, strerror(errno));
429 signal(SIGINT, sigdie);
430 signal(SIGQUIT, sigdie);
431 signal(SIGTERM, sigdie);
434 /* --- Connect to the server --- */
440 sigset_t newmask, oldmask;
442 sa.sa_handler = reap;
443 sigemptyset(&sa.sa_mask);
444 sa.sa_flags = SA_NOCLDSTOP;
446 sa.sa_flags |= SA_RESTART;
448 sigaction(SIGCHLD, &sa, 0);
450 DA_UNSHIFT(&spawnopts, (char *)sock);
451 DA_UNSHIFT(&spawnopts, "-a");
452 DA_UNSHIFT(&spawnopts, "-d.");
453 DA_UNSHIFT(&spawnopts, "-F");
454 DA_UNSHIFT(&spawnopts, (char *)spawnpath);
455 DA_PUSH(&spawnopts, 0);
456 if (socketpair(PF_UNIX, SOCK_STREAM, 0, pfd))
457 die(EXIT_FAILURE, "error from socketpair: %s", strerror(errno));
458 sigemptyset(&newmask);
459 sigaddset(&newmask, SIGCHLD);
460 sigprocmask(SIG_BLOCK, &newmask, &oldmask);
461 if ((kid = fork()) < 0)
462 die(EXIT_FAILURE, "fork failed: %s", strerror(errno));
464 dup2(pfd[1], STDIN_FILENO);
465 dup2(pfd[1], STDOUT_FILENO);
468 if (logfp) fclose(logfp);
469 if (pidfp) fclose(pidfp);
471 if (f & f_daemon) detachtty();
472 execvp(DA(&spawnopts)[0], DA(&spawnopts));
473 die(127, "couldn't exec `%s': %s", spawnpath, strerror(errno));
475 sigprocmask(SIG_SETMASK, &oldmask, 0);
479 struct sockaddr_un sun;
480 size_t sz = strlen(sock) + 1;
481 if (sz > sizeof(sun.sun_path))
482 die(EXIT_FAILURE, "socket name `%s' too long", sock);
483 memset(&sun, 0, sizeof(sun));
484 sun.sun_family = AF_UNIX;
485 memcpy(sun.sun_path, sock, sz);
486 sz = sz + offsetof(struct sockaddr_un, sun_path);
487 if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0)
488 die(EXIT_FAILURE, "error making socket: %s", strerror(errno));
489 if (connect(fd, (struct sockaddr *)&sun, sz)) {
490 die(EXIT_FAILURE, "error connecting to `%s': %s",
491 sun.sun_path, strerror(errno));
497 die(EXIT_FAILURE, "error becoming daemon: %s", strerror(errno));
500 fprintf(pidfp, "%li\n", (long)getpid());
503 signal(SIGPIPE, SIG_IGN);
505 /* --- If we're meant to be interactive, do that --- */
508 setup("WATCH -A+tw");
509 if (!(f & f_noinput) && optind == argc) {
514 selbuf_init(&bu, &sel, STDIN_FILENO, uline, &bu);
515 selbuf_init(&bs, &sel, fd, sline, &bs);
517 if (sel_select(&sel) && errno != EINTR && errno != EAGAIN)
518 die(EXIT_FAILURE, "select failed: %s", strerror(errno));
522 /* --- If there's a command, submit it --- */
526 setup((f & f_warn) ? "WATCH -A+w" : "WATCH -A");
527 while (optind < argc)
528 u_quotify(&d, argv[optind++]);
531 if (write(fd, d.buf, d.len) != d.len || shutdown(fd, 1))
532 die(EXIT_FAILURE, "write failed: %s", strerror(errno));
537 /* --- Pull everything else out of the box --- */
545 selbuf_init(&b, &sel, fd, cline, 0);
548 openlog(QUIS, 0, LOG_DAEMON);
551 sig_add(&hup, SIGHUP, sighup, 0);
554 if (sel_select(&sel) && errno != EINTR && errno != EAGAIN)
555 die(EXIT_FAILURE, "select failed: %s", strerror(errno));
562 /*----- That's all, folks -------------------------------------------------*/