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;
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)
125 die(EXIT_FAILURE, "unexpected foreground response");
128 static void cline(char *p, size_t len, void *b)
133 die(EXIT_FAILURE, "server dropped the connection");
139 if (strcmp(q, "WARN") == 0) {
141 syslog(LOG_WARNING, "%s", p);
143 writelog("warning", p);
145 fprintf(stderr, "Warning: %s\n", p);
146 } else if (strcmp(q, "TRACE") == 0) {
148 syslog(LOG_DEBUG, "%s", p);
150 writelog("debug", p);
151 } else if (!(f & f_command)) {
153 syslog(LOG_ERR, "unexpected output `%s %s'", q, p);
156 dstr_putf(&d, "unexpected output `%s %s'", q, p);
157 writelog("error", d.buf);
160 } else if (strcmp(q, "FAIL") == 0) {
162 die(EXIT_FAILURE, "%s", p);
163 } else if (strcmp(q, "INFO") == 0) {
166 } else if (strcmp(q, "OK") == 0) {
169 } else if (strcmp(q, "BGDETACH") == 0) {
171 die(EXIT_FAILURE, "repeat detach");
173 } else if (strcmp(q, "BGOK") == 0) {
176 } else if (strcmp(q, "BGINFO") == 0) {
179 } else if (strcmp(q, "BGFAIL") == 0) {
181 die(EXIT_FAILURE, "%s", p);
183 die(EXIT_FAILURE, "unexpected output `%s %s'", q, p);
186 static void sline(char *p, size_t len, void *b)
190 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)
279 static void sigdie(int sig)
282 signal(sig, SIG_DFL);
286 static void version(FILE *fp)
287 { pquis(fp, "$, TrIPE version " VERSION "\n"); }
289 static void usage(FILE *fp)
293 $ [-w] [-OPTIONS] [COMMAND [ARGS]...]\n\
294 $ [-Dl] [-f FILE] [-OPTIONS]\n\
296 [-s] [-d DIRECTORY] [-a SOCKET] [-P PIDFILE]\n\
297 [-p PROGRAM] [-S ARG,ARG,...]\n\
301 static void help(FILE *fp)
310 -h, --help Show this help text.\n\
311 -v, --version Show version number.\n\
312 -u, --usage Show brief usage message.\n\
314 -D, --daemon Become a background task after connecting.\n\
315 -d, --directory=DIR Select current directory [default " CONFIGDIR "].\n\
316 -a, --admin-socket=FILE Select socket to connect to\n\
317 [default " SOCKETDIR "/tripesock].\n\
318 -P, --pidfile=FILE Write process-id to FILE.\n\
320 -s, --spawn Start server rather than connecting.\n\
321 -p, --spawn-path=PATH Specify path to executable.\n\
322 -S, --spawn-args=ARGS Specify comma-separated arguments.\n\
324 -l, --syslog Log messages to system log.\n\
325 -f, --logfile=FILE Log messages to FILE.\n\
326 -w, --warnings Show warnings when running commands.\n\
330 int main(int argc, char *argv[])
332 const char *dir = CONFIGDIR;
333 const char *sock = SOCKETDIR "/tripesock";
334 const char *spawnpath = "tripe";
335 string_v spawnopts = DA_INIT;
341 if ((p = getenv("TRIPEDIR")) != 0)
344 /* --- Parse the arguments --- */
347 static const struct option opts[] = {
348 { "help", 0, 0, 'h' },
349 { "version", 0, 0, 'v' },
350 { "usage", 0, 0, 'u' },
351 { "daemon", 0, 0, 'D' },
352 { "directory", OPTF_ARGREQ, 0, 'd' },
353 { "admin-socket", OPTF_ARGREQ, 0, 'a' },
354 { "spawn", 0, 0, 's' },
355 { "spawn-path", OPTF_ARGREQ, 0, 'p' },
356 { "spawn-args", OPTF_ARGREQ, 0, 'S' },
357 { "syslog", 0, 0, 'l' },
358 { "logfile", OPTF_ARGREQ, 0, 'f' },
359 { "warnings", 0, 0, 'w' },
360 { "pidfile", OPTF_ARGREQ, 0, 'P' },
364 int i = mdwopt(argc, argv, "+hvuDd:a:sp:S:lwf:nP:", opts, 0, 0, 0);
378 f |= f_daemon | f_noinput;
394 f |= f_spawn | f_spawnopts;
395 for (p = strtok(optarg, ","); p; p = strtok(0, ","))
396 DA_PUSH(&spawnopts, p);
399 f |= f_syslog | f_noinput;
416 if ((f & f_bogus) || ((f & f_noinput) && optind < argc)) {
421 /* --- Set various things up --- */
424 die(EXIT_FAILURE, "couldn't set `%s' as current directory: %s",
425 dir, strerror(errno));
429 if (!pidfile && (f & f_daemon) && ((f & f_syslog) || logname))
430 pidfile = "tripectl.pid";
431 if (pidfile && (pidfp = fopen(pidfile, "w")) == 0) {
432 die(EXIT_FAILURE, "couldn't open `%s' for writing: %s",
433 pidfile, strerror(errno));
435 signal(SIGINT, sigdie);
436 signal(SIGQUIT, sigdie);
437 signal(SIGTERM, sigdie);
440 /* --- Connect to the server --- */
446 sigset_t newmask, oldmask;
448 sa.sa_handler = reap;
449 sigemptyset(&sa.sa_mask);
450 sa.sa_flags = SA_NOCLDSTOP;
452 sa.sa_flags |= SA_RESTART;
454 sigaction(SIGCHLD, &sa, 0);
456 DA_UNSHIFT(&spawnopts, (char *)sock);
457 DA_UNSHIFT(&spawnopts, "-a");
458 DA_UNSHIFT(&spawnopts, "-d.");
459 DA_UNSHIFT(&spawnopts, (char *)spawnpath);
460 DA_PUSH(&spawnopts, 0);
461 if (socketpair(PF_UNIX, SOCK_STREAM, 0, pfd))
462 die(EXIT_FAILURE, "error from socketpair: %s", strerror(errno));
463 sigemptyset(&newmask);
464 sigaddset(&newmask, SIGCHLD);
465 sigprocmask(SIG_BLOCK, &newmask, &oldmask);
466 if ((kid = fork()) < 0)
467 die(EXIT_FAILURE, "fork failed: %s", strerror(errno));
469 dup2(pfd[1], STDIN_FILENO);
470 dup2(pfd[1], STDOUT_FILENO);
480 execvp(DA(&spawnopts)[0], DA(&spawnopts));
481 die(127, "couldn't exec `%s': %s", spawnpath, strerror(errno));
483 sigprocmask(SIG_SETMASK, &oldmask, 0);
487 struct sockaddr_un sun;
488 size_t sz = strlen(sock) + 1;
489 if (sz > sizeof(sun.sun_path))
490 die(EXIT_FAILURE, "socket name `%s' too long", sock);
491 memset(&sun, 0, sizeof(sun));
492 sun.sun_family = AF_UNIX;
493 memcpy(sun.sun_path, sock, sz);
494 sz = sz + offsetof(struct sockaddr_un, sun_path);
495 if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0)
496 die(EXIT_FAILURE, "error making socket: %s", strerror(errno));
497 if (connect(fd, (struct sockaddr *)&sun, sz)) {
498 die(EXIT_FAILURE, "error connecting to `%s': %s",
499 sun.sun_path, strerror(errno));
505 die(EXIT_FAILURE, "error becoming daemon: %s", strerror(errno));
508 fprintf(pidfp, "%li\n", (long)getpid());
511 signal(SIGPIPE, SIG_IGN);
513 /* --- If we're meant to be interactive, do that --- */
516 setup("WATCH -A+tw");
517 if (!(f & f_noinput) && optind == argc) {
522 selbuf_init(&bu, &sel, STDIN_FILENO, uline, &bu);
523 selbuf_init(&bs, &sel, fd, sline, &bs);
525 if (sel_select(&sel) && errno != EINTR && errno != EAGAIN)
526 die(EXIT_FAILURE, "select failed: %s", strerror(errno));
530 /* --- If there's a command, submit it --- */
534 setup((f & f_warn) ? "WATCH -A+w" : "WATCH -A");
535 while (optind < argc)
536 u_quotify(&d, argv[optind++]);
539 if (write(fd, d.buf, d.len) != d.len || shutdown(fd, 1))
540 die(EXIT_FAILURE, "write failed: %s", strerror(errno));
545 /* --- Pull everything else out of the box --- */
553 selbuf_init(&b, &sel, fd, cline, 0);
556 openlog(QUIS, 0, LOG_DAEMON);
559 sig_add(&hup, SIGHUP, sighup, 0);
562 if (sel_select(&sel) && errno != EINTR && errno != EAGAIN)
563 die(EXIT_FAILURE, "select failed: %s", strerror(errno));
570 /*----- That's all, folks -------------------------------------------------*/