3 * $Id: client.c,v 1.14 2004/04/08 01:36:17 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 /*----- 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;
86 #define f_spawnopts 8u
93 /*----- Main code ---------------------------------------------------------*/
95 static void reap(int sig
)
98 while (waitpid(-1, 0, WNOHANG
) > 0)
103 static void writelog(const char *cat
, const char *msg
)
107 struct tm
*tm
= localtime(&t
);
108 strftime(buf
, sizeof(buf
), "%Y-%m-%d %H:%M:%S", tm
);
109 fprintf(logfp
, "%s %s: %s\n", buf
, cat
, msg
);
112 static void cline(char *p
, size_t len
, void *b
)
117 die(EXIT_FAILURE
, "server dropped the connection");
123 if (strcmp(q
, "WARN") == 0) {
125 syslog(LOG_WARNING
, "%s", p
);
127 writelog("warning", p
);
129 fprintf(stderr
, "Warning: %s\n", p
);
130 } else if (strcmp(q
, "TRACE") == 0) {
132 syslog(LOG_DEBUG
, "%s", p
);
134 writelog("debug", p
);
135 } else if (!(f
& f_command
)) {
137 syslog(LOG_ERR
, "unexpected output `%s %s'", q
, p
);
140 dstr_putf(&d
, "unexpected output `%s %s'", q
, p
);
141 writelog("error", d
.buf
);
144 } else if (strcmp(q
, "FAIL") == 0)
145 die(EXIT_FAILURE
, "%s", p
);
146 else if (strcmp(q
, "INFO") == 0)
148 else if (strcmp(q
, "OK") == 0)
151 die(EXIT_FAILURE
, "unexpected output `%s %s'", q
, p
);
154 static void sline(char *p
, size_t len
, void *b
)
158 moan("server closed the connection");
164 static void uline(char *p
, size_t len
, void *b
)
172 write(fd
, p
, len
+ 1);
176 static void logfile(const char *name
)
180 if ((fp
= fopen(name
, "a")) != 0) {
184 setvbuf(logfp
, 0, _IOLBF
, BUFSIZ
);
187 dstr_putf(&d
, "error opening logfile `%s': %s", name
, strerror(errno
));
189 writelog("error", d
.buf
);
191 die(EXIT_FAILURE
, d
.buf
);
193 syslog(LOG_ERR
, d
.buf
);
198 static void sighup(int sig
, void *v
)
203 static void cleanup(void)
209 static void sigdie(int sig
)
212 signal(sig
, SIG_DFL
);
216 static void version(FILE *fp
)
218 pquis(fp
, "$, TrIPE version " VERSION
"\n");
221 static void usage(FILE *fp
)
225 $ [-w] [-options] [command [args]...]\n\
226 $ [-Dl] [-f file] [-options]\n\
228 [-s] [-d directory] [-a socket] [-P pidfile]\n\
229 [-p program] [-S arg,arg,...]\n\
233 static void help(FILE *fp
)
242 -h, --help Show this help text.\n\
243 -v, --version Show version number.\n\
244 -u, --usage Show brief usage message.\n\
246 -D, --daemon Become a background task after connecting.\n\
247 -d, --directory=DIR Select current directory [default " CONFIGDIR
"].\n\
248 -a, --admin-socket=FILE Select socket to connect to
249 [default " SOCKETDIR
"/tripesock].\n\
250 -P, --pidfile=FILE Write process-id to FILE.\n\
252 -s, --spawn Start server rather than connecting.\n\
253 -p, --spawn-path=PATH Specify path to executable.\n\
254 -S, --spawn-args=ARGS Specify comma-separated arguments.\n\
256 -l, --syslog Log messages to system log.\n\
257 -f, --logfile=FILE Log messages to FILE.\n\
258 -w, --warnings Show warnings when running commands.\n\
262 int main(int argc
, char *argv
[])
264 const char *dir
= CONFIGDIR
;
265 const char *sock
= SOCKETDIR
"/tripesock";
266 const char *spawnpath
= "tripe";
267 string_v spawnopts
= DA_INIT
;
273 if ((p
= getenv("TRIPEDIR")) != 0)
276 /* --- Parse the arguments --- */
279 static const struct option opts
[] = {
280 { "help", 0, 0, 'h' },
281 { "version", 0, 0, 'v' },
282 { "usage", 0, 0, 'u' },
283 { "daemon", 0, 0, 'D' },
284 { "directory", OPTF_ARGREQ
, 0, 'd' },
285 { "admin-socket", OPTF_ARGREQ
, 0, 'a' },
286 { "spawn", 0, 0, 's' },
287 { "spawn-path", OPTF_ARGREQ
, 0, 'p' },
288 { "spawn-args", OPTF_ARGREQ
, 0, 'S' },
289 { "syslog", 0, 0, 'l' },
290 { "logfile", OPTF_ARGREQ
, 0, 'f' },
291 { "warnings", 0, 0, 'w' },
292 { "pidfile", OPTF_ARGREQ
, 0, 'P' },
296 int i
= mdwopt(argc
, argv
, "+hvuDd:a:sp:S:lwf:nP:", opts
, 0, 0, 0);
310 f
|= f_daemon
| f_noinput
;
326 f
|= f_spawn
| f_spawnopts
;
327 for (p
= strtok(optarg
, ","); p
; p
= strtok(0, ","))
328 DA_PUSH(&spawnopts
, p
);
331 f
|= f_syslog
| f_noinput
;
348 if ((f
& f_bogus
) || ((f
& f_noinput
) && optind
< argc
)) {
353 /* --- Set various things up --- */
356 die(EXIT_FAILURE
, "couldn't set `%s' as current directory: %s",
357 dir
, strerror(errno
));
361 if (!pidfile
&& (f
& f_daemon
) && ((f
& f_syslog
) || logname
))
362 pidfile
= "tripectl.pid";
363 if (pidfile
&& (pidfp
= fopen(pidfile
, "w")) == 0) {
364 die(EXIT_FAILURE
, "couldn't open `%s' for writing: %s",
365 pidfile
, strerror(errno
));
367 signal(SIGINT
, sigdie
);
368 signal(SIGQUIT
, sigdie
);
369 signal(SIGTERM
, sigdie
);
372 /* --- Connect to the server --- */
378 sigset_t newmask
, oldmask
;
380 sa
.sa_handler
= reap
;
381 sigemptyset(&sa
.sa_mask
);
382 sa
.sa_flags
= SA_NOCLDSTOP
;
384 sa
.sa_flags
|= SA_RESTART
;
386 sigaction(SIGCHLD
, &sa
, 0);
388 DA_UNSHIFT(&spawnopts
, (char *)sock
);
389 DA_UNSHIFT(&spawnopts
, "-a");
390 DA_UNSHIFT(&spawnopts
, "-d.");
391 DA_UNSHIFT(&spawnopts
, (char *)spawnpath
);
392 DA_PUSH(&spawnopts
, 0);
393 if (socketpair(PF_UNIX
, SOCK_STREAM
, 0, pfd
))
394 die(EXIT_FAILURE
, "error from socketpair: %s", strerror(errno
));
395 sigemptyset(&newmask
);
396 sigaddset(&newmask
, SIGCHLD
);
397 sigprocmask(SIG_BLOCK
, &newmask
, &oldmask
);
398 if ((kid
= fork()) < 0)
399 die(EXIT_FAILURE
, "fork failed: %s", strerror(errno
));
401 dup2(pfd
[1], STDIN_FILENO
);
402 dup2(pfd
[1], STDOUT_FILENO
);
412 execvp(DA(&spawnopts
)[0], DA(&spawnopts
));
413 die(127, "couldn't exec `%s': %s", spawnpath
, strerror(errno
));
415 sigprocmask(SIG_SETMASK
, &oldmask
, 0);
419 struct sockaddr_un sun
;
420 size_t sz
= strlen(sock
) + 1;
421 if (sz
> sizeof(sun
.sun_path
))
422 die(EXIT_FAILURE
, "socket name `%s' too long", sock
);
423 memset(&sun
, 0, sizeof(sun
));
424 sun
.sun_family
= AF_UNIX
;
425 memcpy(sun
.sun_path
, sock
, sz
);
426 sz
= sz
+ offsetof(struct sockaddr_un
, sun_path
);
427 if ((fd
= socket(PF_UNIX
, SOCK_STREAM
, 0)) < 0)
428 die(EXIT_FAILURE
, "error making socket: %s", strerror(errno
));
429 if (connect(fd
, (struct sockaddr
*)&sun
, sz
)) {
430 die(EXIT_FAILURE
, "error connecting to `%s': %s",
431 sun
.sun_path
, strerror(errno
));
437 die(EXIT_FAILURE
, "error becoming daemon: %s", strerror(errno
));
440 fprintf(pidfp
, "%li\n", (long)getpid());
444 /* --- If we're meant to be interactive, do that --- */
446 if (!(f
& f_noinput
) && optind
== argc
) {
451 selbuf_init(&bu
, &sel
, STDIN_FILENO
, uline
, &bu
);
452 selbuf_init(&bs
, &sel
, fd
, sline
, &bs
);
454 if (sel_select(&sel
) && errno
!= EINTR
&& errno
!= EAGAIN
)
455 die(EXIT_FAILURE
, "select failed: %s", strerror(errno
));
459 /* --- If there's a command, submit it --- */
463 dstr_puts(&d
, argv
[optind
++]);
464 while (optind
< argc
) {
466 dstr_puts(&d
, argv
[optind
++]);
469 write(fd
, d
.buf
, d
.len
);
475 /* --- Pull everything else out of the box --- */
483 selbuf_init(&b
, &sel
, fd
, cline
, 0);
486 openlog(QUIS
, 0, LOG_DAEMON
);
489 sig_add(&hup
, SIGHUP
, sighup
, 0);
492 if (sel_select(&sel
) && errno
!= EINTR
&& errno
!= EAGAIN
)
493 die(EXIT_FAILURE
, "select failed: %s", strerror(errno
));
500 /*----- That's all, folks -------------------------------------------------*/