3 * $Id: client.c,v 1.12 2003/10/15 09:29:38 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 1.12 2003/10/15 09:29:38 mdw
33 * Cosmetic fix to changelog comment.
35 * Revision 1.11 2003/07/13 11:19:49 mdw
36 * Incompatible protocol fix! Include message type code under MAC tag to
37 * prevent cut-and-paste from key-exchange messages to general packet
40 * Revision 1.10 2003/05/17 10:59:19 mdw
41 * Put a newline in the pidfile.
43 * Revision 1.9 2002/01/13 14:57:18 mdw
44 * Track @lbuf@ changes in mLib.
46 * Revision 1.8 2001/06/19 22:09:37 mdw
47 * Move the program name to the right place when constructing the arguments
48 * to pass to a new server.
50 * Revision 1.7 2001/02/22 09:07:54 mdw
51 * Write a pidfile on request, and delete it when finished.
53 * Revision 1.6 2001/02/22 09:06:08 mdw
54 * Fix logfile rotation to avoid program collapse.
56 * Revision 1.5 2001/02/16 21:23:39 mdw
57 * Use reliable signal handling for reopening logs.
59 * Revision 1.4 2001/02/06 09:34:53 mdw
60 * Change ERR response to FAIL for consistency with other programs.
62 * Revision 1.3 2001/02/04 17:10:15 mdw
63 * Reopen logfiles on receipt of @SIGHUP@ (not done very well). Don't
64 * change directory -- just mangle pathnames instead.
66 * Revision 1.2 2001/02/04 01:17:54 mdw
67 * Create a configuration header file to tidy up command lines.
69 * Revision 1.1 2001/02/03 20:26:37 mdw
74 /*----- Header files ------------------------------------------------------*/
86 #include <sys/types.h>
93 #include <sys/socket.h>
95 #include <arpa/inet.h>
98 #include <mLib/alloc.h>
99 #include <mLib/darray.h>
100 #include <mLib/dstr.h>
101 #include <mLib/mdwopt.h>
102 #include <mLib/quis.h>
103 #include <mLib/report.h>
104 #include <mLib/sel.h>
105 #include <mLib/selbuf.h>
106 #include <mLib/sig.h>
107 #include <mLib/str.h>
113 /*----- Data structures ---------------------------------------------------*/
117 DA_DECL(string_v
, char *);
120 /*----- Static variables --------------------------------------------------*/
122 static const char *pidfile
= 0;
123 static const char *logname
= 0;
124 static FILE *logfp
= 0;
125 static unsigned f
= 0;
131 #define f_spawnopts 8u
133 #define f_command 32u
134 #define f_noinput 64u
136 #define f_uclose 256u
138 /*----- Main code ---------------------------------------------------------*/
140 static void reap(int sig
)
143 while (waitpid(-1, 0, WNOHANG
) > 0)
148 static void writelog(const char *cat
, const char *msg
)
152 struct tm
*tm
= localtime(&t
);
153 strftime(buf
, sizeof(buf
), "%Y-%m-%d %H:%M:%S", tm
);
154 fprintf(logfp
, "%s %s: %s\n", buf
, cat
, msg
);
157 static void cline(char *p
, size_t len
, void *b
)
162 die(EXIT_FAILURE
, "server dropped the connection");
168 if (strcmp(q
, "WARN") == 0) {
170 syslog(LOG_WARNING
, "%s", p
);
172 writelog("warning", p
);
174 fprintf(stderr
, "Warning: %s\n", p
);
175 } else if (strcmp(q
, "TRACE") == 0) {
177 syslog(LOG_DEBUG
, "%s", p
);
179 writelog("debug", p
);
180 } else if (!(f
& f_command
)) {
182 syslog(LOG_ERR
, "unexpected output `%s %s'", q
, p
);
185 dstr_putf(&d
, "unexpected output `%s %s'", q
, p
);
186 writelog("error", d
.buf
);
189 } else if (strcmp(q
, "FAIL") == 0)
190 die(EXIT_FAILURE
, "%s", p
);
191 else if (strcmp(q
, "INFO") == 0)
193 else if (strcmp(q
, "OK") == 0)
196 die(EXIT_FAILURE
, "unexpected output `%s %s'", q
, p
);
199 static void sline(char *p
, size_t len
, void *b
)
203 moan("server closed the connection");
209 static void uline(char *p
, size_t len
, void *b
)
217 write(fd
, p
, len
+ 1);
221 static void logfile(const char *name
)
225 if ((fp
= fopen(name
, "a")) != 0) {
229 setvbuf(logfp
, 0, _IOLBF
, BUFSIZ
);
232 dstr_putf(&d
, "error opening logfile `%s': %s", name
, strerror(errno
));
234 writelog("error", d
.buf
);
236 die(EXIT_FAILURE
, d
.buf
);
238 syslog(LOG_ERR
, d
.buf
);
243 static void sighup(int sig
, void *v
)
248 static void cleanup(void)
254 static void sigdie(int sig
)
257 signal(sig
, SIG_DFL
);
261 static void version(FILE *fp
)
263 pquis(fp
, "$, TrIPE version " VERSION
"\n");
266 static void usage(FILE *fp
)
270 $ [-w] [-options] [command [args]...]\n\
271 $ [-Dl] [-f file] [-options]\n\
273 [-s] [-d directory] [-a socket] [-P pidfile]\n\
274 [-p program] [-S arg,arg,...]\n\
278 static void help(FILE *fp
)
287 -h, --help Show this help text.\n\
288 -v, --version Show version number.\n\
289 -u, --usage Show brief usage message.\n\
291 -D, --daemon Become a background task after connecting.\n\
292 -d, --directory=DIR Select current directory [default /var/lib/tripe]\n\
293 -a, --admin-socket=FILE Select socket to connect to.\n\
294 -P, --pidfile=FILE Write process-id to FILE.\n\
296 -s, --spawn Start server rather than connecting.\n\
297 -p, --spawn-path=PATH Specify path to executable.\n\
298 -S, --spawn-args=ARGS Specify comma-separated arguments.\n\
300 -l, --syslog Log messages to system log.\n\
301 -f, --logfile=FILE Log messages to FILE.\n\
302 -w, --warnings Show warnings when running commands.\n\
306 int main(int argc
, char *argv
[])
308 const char *dir
= "/var/lib/tripe";
309 const char *sock
= "tripesock";
310 const char *spawnpath
= "tripe";
311 string_v spawnopts
= DA_INIT
;
317 if ((p
= getenv("TRIPEDIR")) != 0)
320 /* --- Parse the arguments --- */
323 static const struct option opts
[] = {
324 { "help", 0, 0, 'h' },
325 { "version", 0, 0, 'v' },
326 { "usage", 0, 0, 'u' },
327 { "daemon", 0, 0, 'D' },
328 { "directory", OPTF_ARGREQ
, 0, 'd' },
329 { "admin-socket", OPTF_ARGREQ
, 0, 'a' },
330 { "spawn", 0, 0, 's' },
331 { "spawn-path", OPTF_ARGREQ
, 0, 'p' },
332 { "spawn-args", OPTF_ARGREQ
, 0, 'S' },
333 { "syslog", 0, 0, 'l' },
334 { "logfile", OPTF_ARGREQ
, 0, 'f' },
335 { "warnings", 0, 0, 'w' },
336 { "pidfile", OPTF_ARGREQ
, 0, 'P' },
340 int i
= mdwopt(argc
, argv
, "+hvuDd:a:sp:S:lwf:nP:", opts
, 0, 0, 0);
354 f
|= f_daemon
| f_noinput
;
370 f
|= f_spawn
| f_spawnopts
;
371 for (p
= strtok(optarg
, ","); p
; p
= strtok(0, ","))
372 DA_PUSH(&spawnopts
, p
);
375 f
|= f_syslog
| f_noinput
;
392 if ((f
& f_bogus
) || ((f
& f_noinput
) && optind
< argc
)) {
397 /* --- Set various things up --- */
400 die(EXIT_FAILURE
, "couldn't set `%s' as current directory: %s",
401 dir
, strerror(errno
));
405 if (!pidfile
&& (f
& f_daemon
) && ((f
& f_syslog
) || logname
))
406 pidfile
= "tripectl.pid";
407 if (pidfile
&& (pidfp
= fopen(pidfile
, "w")) == 0) {
408 die(EXIT_FAILURE
, "couldn't open `%s' for writing: %s",
409 pidfile
, strerror(errno
));
411 signal(SIGINT
, sigdie
);
412 signal(SIGQUIT
, sigdie
);
413 signal(SIGTERM
, sigdie
);
416 /* --- Connect to the server --- */
422 sigset_t newmask
, oldmask
;
424 sa
.sa_handler
= reap
;
425 sigemptyset(&sa
.sa_mask
);
426 sa
.sa_flags
= SA_NOCLDSTOP
;
428 sa
.sa_flags
|= SA_RESTART
;
430 sigaction(SIGCHLD
, &sa
, 0);
432 DA_UNSHIFT(&spawnopts
, (char *)sock
);
433 DA_UNSHIFT(&spawnopts
, "-a");
434 DA_UNSHIFT(&spawnopts
, "-d.");
435 DA_UNSHIFT(&spawnopts
, (char *)spawnpath
);
436 DA_PUSH(&spawnopts
, 0);
437 if (socketpair(PF_UNIX
, SOCK_STREAM
, 0, pfd
))
438 die(EXIT_FAILURE
, "error from socketpair: %s", strerror(errno
));
439 sigemptyset(&newmask
);
440 sigaddset(&newmask
, SIGCHLD
);
441 sigprocmask(SIG_BLOCK
, &newmask
, &oldmask
);
442 if ((kid
= fork()) < 0)
443 die(EXIT_FAILURE
, "fork failed: %s", strerror(errno
));
445 dup2(pfd
[1], STDIN_FILENO
);
446 dup2(pfd
[1], STDOUT_FILENO
);
456 execvp(DA(&spawnopts
)[0], DA(&spawnopts
));
457 die(127, "couldn't exec `%s': %s", spawnpath
, strerror(errno
));
459 sigprocmask(SIG_SETMASK
, &oldmask
, 0);
463 struct sockaddr_un sun
;
464 size_t sz
= strlen(sock
) + 1;
465 if (sz
> sizeof(sun
.sun_path
))
466 die(EXIT_FAILURE
, "socket name `%s' too long", sock
);
467 memset(&sun
, 0, sizeof(sun
));
468 sun
.sun_family
= AF_UNIX
;
469 memcpy(sun
.sun_path
, sock
, sz
);
470 sz
= sz
+ offsetof(struct sockaddr_un
, sun_path
);
471 if ((fd
= socket(PF_UNIX
, SOCK_STREAM
, 0)) < 0)
472 die(EXIT_FAILURE
, "error making socket: %s", strerror(errno
));
473 if (connect(fd
, (struct sockaddr
*)&sun
, sz
)) {
474 die(EXIT_FAILURE
, "error connecting to `%s': %s",
475 sun
.sun_path
, strerror(errno
));
481 die(EXIT_FAILURE
, "error becoming daemon: %s", strerror(errno
));
484 fprintf(pidfp
, "%li\n", (long)getpid());
488 /* --- If we're meant to be interactive, do that --- */
490 if (!(f
& f_noinput
) && optind
== argc
) {
495 selbuf_init(&bu
, &sel
, STDIN_FILENO
, uline
, &bu
);
496 selbuf_init(&bs
, &sel
, fd
, sline
, &bs
);
498 if (sel_select(&sel
) && errno
!= EINTR
&& errno
!= EAGAIN
)
499 die(EXIT_FAILURE
, "select failed: %s", strerror(errno
));
503 /* --- If there's a command, submit it --- */
507 dstr_puts(&d
, argv
[optind
++]);
508 while (optind
< argc
) {
510 dstr_puts(&d
, argv
[optind
++]);
513 write(fd
, d
.buf
, d
.len
);
519 /* --- Pull everything else out of the box --- */
527 selbuf_init(&b
, &sel
, fd
, cline
, 0);
530 openlog(QUIS
, 0, LOG_DAEMON
);
533 sig_add(&hup
, SIGHUP
, sighup
, 0);
536 if (sel_select(&sel
) && errno
!= EINTR
&& errno
!= EAGAIN
)
537 die(EXIT_FAILURE
, "select failed: %s", strerror(errno
));
544 /*----- That's all, folks -------------------------------------------------*/