3 * $Id: client.c,v 1.5 2001/02/16 21:23:39 mdw Exp $
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 /*----- Revision history --------------------------------------------------*
32 * Revision 1.5 2001/02/16 21:23:39 mdw
33 * Use reliable signal handling for reopening logs.
35 * Revision 1.4 2001/02/06 09:34:53 mdw
36 * Change ERR response to FAIL for consistency with other programs.
38 * Revision 1.3 2001/02/04 17:10:15 mdw
39 * Reopen logfiles on receipt of @SIGHUP@ (not done very well). Don't
40 * change directory -- just mangle pathnames instead.
42 * Revision 1.2 2001/02/04 01:17:54 mdw
43 * Create a configuration header file to tidy up command lines.
45 * Revision 1.1 2001/02/03 20:26:37 mdw
50 /*----- Header files ------------------------------------------------------*/
62 #include <sys/types.h>
69 #include <sys/socket.h>
71 #include <arpa/inet.h>
74 #include <mLib/alloc.h>
75 #include <mLib/darray.h>
76 #include <mLib/dstr.h>
77 #include <mLib/mdwopt.h>
78 #include <mLib/quis.h>
79 #include <mLib/report.h>
81 #include <mLib/selbuf.h>
89 /*----- Data structures ---------------------------------------------------*/
93 DA_DECL(string_v, char *);
96 /*----- Static variables --------------------------------------------------*/
98 static FILE *logfp = 0;
99 static unsigned f = 0;
100 static const char *logname = 0;
106 #define f_spawnopts 8u
108 #define f_command 32u
109 #define f_noinput 64u
111 #define f_uclose 256u
113 /*----- Main code ---------------------------------------------------------*/
115 static void reap(int sig)
119 while (waitpid(-1, &s, WNOHANG) > 0)
124 static void writelog(const char *cat, const char *msg)
128 struct tm *tm = localtime(&t);
129 strftime(buf, sizeof(buf), "%Y-%m-%d %H:%M:%S", tm);
130 fprintf(logfp, "%s %s: %s\n", buf, cat, msg);
133 static void cline(char *p, void *b)
138 die(EXIT_FAILURE, "server dropped the connection");
144 if (strcmp(q, "WARN") == 0) {
146 syslog(LOG_WARNING, "%s", p);
148 writelog("warning", p);
150 fprintf(stderr, "Warning: %s\n", p);
151 } else if (strcmp(q, "TRACE") == 0) {
153 syslog(LOG_DEBUG, "%s", p);
155 writelog("debug", p);
156 } else if (!(f & f_command)) {
158 syslog(LOG_ERR, "unexpected output `%s %s'", q, p);
161 dstr_putf(&d, "unexpected output `%s %s'", q, p);
162 writelog("error", d.buf);
165 } else if (strcmp(q, "FAIL") == 0)
166 die(EXIT_FAILURE, "%s", p);
167 else if (strcmp(q, "INFO") == 0)
169 else if (strcmp(q, "OK") == 0)
172 die(EXIT_FAILURE, "unexpected output `%s %s'", q, p);
175 static void sline(char *p, void *b)
179 moan("server closed the connection");
185 static void uline(char *p, void *b)
195 write(fd, p, sz + 1);
199 static void logfile(const char *name)
203 if ((logfp = fopen(name, "a")) == 0) {
204 die(EXIT_FAILURE, "error opening logfile `%s': %s",
205 name, strerror(errno));
207 setvbuf(logfp, 0, _IOLBF, BUFSIZ);
210 static void sighup(int sig, void *v)
215 static void version(FILE *fp)
217 pquis(fp, "$, TrIPE version " VERSION "\n");
220 static void usage(FILE *fp)
224 $ [-w] [-options] [command [args]...]\n\
225 $ [-Dl] [-f file] [-options]\n\
227 [-s] [-d directory] [-a socket] [-p program] [-S arg,arg,...]\n\
231 static void help(FILE *fp)
240 -h, --help Show this help text.\n\
241 -v, --version Show version number.\n\
242 -u, --usage Show brief usage message.\n\
244 -D, --daemon Become a background task after connecting.\n\
245 -d, --directory=DIR Select current directory [default /var/lib/tripe]\n\
246 -a, --admin-socket=FILE Select socket to connect to.\n\
248 -s, --spawn Start server rather than connecting.\n\
249 -p, --spawn-path=PATH Specify path to executable.\n\
250 -S, --spawn-args=ARGS Specify comma-separated arguments.\n\
252 -l, --syslog Log messages to system log.\n\
253 -f, --logfile=FILE Log messages to FILE.\n\
254 -w, --warnings Show warnings when running commands.\n\
258 int main(int argc, char *argv[])
260 const char *dir = "/var/lib/tripe";
261 const char *sock = "tripesock";
262 const char *spawnpath = "tripe";
263 string_v spawnopts = DA_INIT;
268 if ((p = getenv("TRIPEDIR")) != 0)
271 /* --- Parse the arguments --- */
274 static const struct option opts[] = {
275 { "help", 0, 0, 'h' },
276 { "version", 0, 0, 'v' },
277 { "usage", 0, 0, 'u' },
278 { "daemon", 0, 0, 'D' },
279 { "directory", OPTF_ARGREQ, 0, 'd' },
280 { "admin-socket", OPTF_ARGREQ, 0, 'a' },
281 { "spawn", 0, 0, 's' },
282 { "spawn-path", OPTF_ARGREQ, 0, 'p' },
283 { "spawn-args", OPTF_ARGREQ, 0, 'S' },
284 { "syslog", 0, 0, 'l' },
285 { "logfile", OPTF_ARGREQ, 0, 'f' },
286 { "warnings", 0, 0, 'w' },
290 int i = mdwopt(argc, argv, "hvuDd:a:sp:S:lwf:n", opts, 0, 0, 0);
304 f |= f_daemon | f_noinput;
320 f |= f_spawn | f_spawnopts;
321 for (p = strtok(optarg, ","); p; p = strtok(0, ","))
322 DA_PUSH(&spawnopts, p);
325 f |= f_syslog | f_noinput;
340 if ((f & f_bogus) || ((f & f_noinput) && optind < argc)) {
345 /* --- Connect to the server --- */
351 sigset_t newmask, oldmask;
353 sa.sa_handler = reap;
354 sigemptyset(&sa.sa_mask);
355 sa.sa_flags = SA_NOCLDSTOP;
357 sa.sa_flags |= SA_RESTART;
359 sigaction(SIGCHLD, &sa, 0);
361 DA_UNSHIFT(&spawnopts, (char *)spawnpath);
362 if (!(f & f_spawnopts)) {
363 DA_PUSH(&spawnopts, "-d");
364 DA_PUSH(&spawnopts, (char *)dir);
365 DA_PUSH(&spawnopts, "-a");
366 DA_PUSH(&spawnopts, (char *)sock);
368 DA_PUSH(&spawnopts, 0);
369 if (socketpair(PF_UNIX, SOCK_STREAM, 0, pfd))
370 die(EXIT_FAILURE, "error from socketpair: %s", strerror(errno));
371 sigemptyset(&newmask);
372 sigaddset(&newmask, SIGCHLD);
373 sigprocmask(SIG_BLOCK, &newmask, &oldmask);
374 if ((kid = fork()) < 0)
375 die(EXIT_FAILURE, "fork failed: %s", strerror(errno));
377 dup2(pfd[1], STDIN_FILENO);
378 dup2(pfd[1], STDOUT_FILENO);
384 execvp(DA(&spawnopts)[0], DA(&spawnopts));
385 die(127, "couldn't exec `%s': %s", spawnpath, strerror(errno));
387 sigprocmask(SIG_SETMASK, &oldmask, 0);
391 struct sockaddr_un sun;
392 size_t sz = strlen(sock) + 1;
394 dstr_putf(&d, "%s/%s", dir, sock);
395 if (d.sz + 1 > sizeof(sun.sun_path))
396 die(EXIT_FAILURE, "socket name `%s' too long", sock);
397 memset(&sun, 0, sizeof(sun));
398 sun.sun_family = AF_UNIX;
399 memcpy(sun.sun_path, d.buf, d.sz + 1);
400 sz = d.sz + offsetof(struct sockaddr_un, sun_path) + 1;
402 if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0)
403 die(EXIT_FAILURE, "error making socket: %s", strerror(errno));
404 if (connect(fd, (struct sockaddr *)&sun, sz)) {
405 die(EXIT_FAILURE, "error connecting to `%s': %s",
406 sun.sun_path, strerror(errno));
412 die(EXIT_FAILURE, "error becoming daemon: %s", strerror(errno));
415 /* --- If we're meant to be interactive, do that --- */
417 if (!(f & f_noinput) && optind == argc) {
422 selbuf_init(&bu, &sel, STDIN_FILENO, uline, &bu);
423 selbuf_init(&bs, &sel, fd, sline, &bs);
425 if (sel_select(&sel) && errno != EINTR && errno != EAGAIN)
426 die(EXIT_FAILURE, "select failed: %s", strerror(errno));
430 /* --- If there's a command, submit it --- */
434 dstr_puts(&d, argv[optind++]);
435 while (optind < argc) {
437 dstr_puts(&d, argv[optind++]);
440 write(fd, d.buf, d.len);
446 /* --- Pull everything else out of the box --- */
454 selbuf_init(&b, &sel, fd, cline, 0);
457 openlog(QUIS, 0, LOG_DAEMON);
460 sig_add(&hup, SIGHUP, sighup, 0);
463 if (sel_select(&sel) && errno != EINTR && errno != EAGAIN)
464 die(EXIT_FAILURE, "select failed: %s", strerror(errno));
471 /*----- That's all, folks -------------------------------------------------*/