3 * $Id: client.c,v 1.3 2001/02/04 17:10:15 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 1.3 2001/02/04 17:10:15 mdw
33 * Reopen logfiles on receipt of @SIGHUP@ (not done very well). Don't
34 * change directory -- just mangle pathnames instead.
36 * Revision 1.2 2001/02/04 01:17:54 mdw
37 * Create a configuration header file to tidy up command lines.
39 * Revision 1.1 2001/02/03 20:26:37 mdw
44 /*----- Header files ------------------------------------------------------*/
56 #include <sys/types.h>
63 #include <sys/socket.h>
65 #include <arpa/inet.h>
68 #include <mLib/alloc.h>
69 #include <mLib/darray.h>
70 #include <mLib/dstr.h>
71 #include <mLib/lbuf.h>
72 #include <mLib/mdwopt.h>
73 #include <mLib/quis.h>
74 #include <mLib/report.h>
76 #include <mLib/selbuf.h>
83 /*----- Data structures ---------------------------------------------------*/
87 DA_DECL(string_v
, char *);
90 /*----- Static variables --------------------------------------------------*/
92 static FILE *logfp
= 0;
93 static unsigned f
= 0;
95 static volatile sig_atomic_t reopen
= 0;
100 #define f_spawnopts 8u
102 #define f_command 32u
103 #define f_noinput 64u
105 #define f_uclose 256u
107 /*----- Main code ---------------------------------------------------------*/
109 static void reap(int sig
)
113 while (waitpid(-1, &s
, WNOHANG
) > 0)
118 static void sighup(int sig
)
123 static void writelog(const char *cat
, const char *msg
)
127 struct tm
*tm
= localtime(&t
);
128 strftime(buf
, sizeof(buf
), "%Y-%m-%d %H:%M:%S", tm
);
129 fprintf(logfp
, "%s %s: %s\n", buf
, cat
, msg
);
132 static void cline(char *p
, void *b
)
137 die(EXIT_FAILURE
, "server dropped the connection");
143 if (strcmp(q
, "WARN") == 0) {
145 syslog(LOG_WARNING
, "%s", p
);
147 writelog("warning", p
);
149 fprintf(stderr
, "Warning: %s\n", p
);
150 } else if (strcmp(q
, "TRACE") == 0) {
152 syslog(LOG_DEBUG
, "%s", p
);
154 writelog("debug", p
);
155 } else if (!(f
& f_command
)) {
157 syslog(LOG_ERR
, "unexpected output `%s %s'", q
, p
);
160 dstr_putf(&d
, "unexpected output `%s %s'", q
, p
);
161 writelog("error", d
.buf
);
164 } else if (strcmp(q
, "ERR") == 0)
165 die(EXIT_FAILURE
, "%s", p
);
166 else if (strcmp(q
, "INFO") == 0)
168 else if (strcmp(q
, "OK") == 0)
171 die(EXIT_FAILURE
, "unexpected output `%s %s'", q
, p
);
174 static void sline(char *p
, void *b
)
178 moan("server closed the connection");
184 static void uline(char *p
, void *b
)
194 write(fd
, p
, sz
+ 1);
198 static void logfile(const char *name
)
202 if ((logfp
= fopen(name
, "a")) == 0) {
203 die(EXIT_FAILURE
, "error opening logfile `%s': %s",
204 name
, strerror(errno
));
206 setvbuf(logfp
, 0, _IOLBF
, BUFSIZ
);
209 static void version(FILE *fp
)
211 pquis(fp
, "$, TrIPE version " VERSION
"\n");
214 static void usage(FILE *fp
)
218 $ [-w] [-options] [command [args]...]\n\
219 $ [-Dl] [-f file] [-options]\n\
221 [-s] [-d directory] [-a socket] [-p program] [-S arg,arg,...]\n\
225 static void help(FILE *fp
)
234 -h, --help Show this help text.\n\
235 -v, --version Show version number.\n\
236 -u, --usage Show brief usage message.\n\
238 -D, --daemon Become a background task after connecting.\n\
239 -d, --directory=DIR Select current directory [default /var/lib/tripe]\n\
240 -a, --admin-socket=FILE Select socket to connect to.\n\
242 -s, --spawn Start server rather than connecting.\n\
243 -p, --spawn-path=PATH Specify path to executable.\n\
244 -S, --spawn-args=ARGS Specify comma-separated arguments.\n\
246 -l, --syslog Log messages to system log.\n\
247 -f, --logfile=FILE Log messages to FILE.\n\
248 -w, --warnings Show warnings when running commands.\n\
252 int main(int argc
, char *argv
[])
254 const char *dir
= "/var/lib/tripe";
255 const char *sock
= "tripesock";
256 const char *spawnpath
= "tripe";
257 string_v spawnopts
= DA_INIT
;
258 const char *logname
= 0;
263 if ((p
= getenv("TRIPEDIR")) != 0)
266 /* --- Parse the arguments --- */
269 static const struct option opts
[] = {
270 { "help", 0, 0, 'h' },
271 { "version", 0, 0, 'v' },
272 { "usage", 0, 0, 'u' },
273 { "daemon", 0, 0, 'D' },
274 { "directory", OPTF_ARGREQ
, 0, 'd' },
275 { "admin-socket", OPTF_ARGREQ
, 0, 'a' },
276 { "spawn", 0, 0, 's' },
277 { "spawn-path", OPTF_ARGREQ
, 0, 'p' },
278 { "spawn-args", OPTF_ARGREQ
, 0, 'S' },
279 { "syslog", 0, 0, 'l' },
280 { "logfile", OPTF_ARGREQ
, 0, 'f' },
281 { "warnings", 0, 0, 'w' },
285 int i
= mdwopt(argc
, argv
, "hvuDd:a:sp:S:lwf:n", opts
, 0, 0, 0);
299 f
|= f_daemon
| f_noinput
;
315 f
|= f_spawn
| f_spawnopts
;
316 for (p
= strtok(optarg
, ","); p
; p
= strtok(0, ","))
317 DA_PUSH(&spawnopts
, p
);
320 f
|= f_syslog
| f_noinput
;
335 if ((f
& f_bogus
) || ((f
& f_noinput
) && optind
< argc
)) {
340 /* --- Connect to the server --- */
346 sigset_t newmask
, oldmask
;
348 sa
.sa_handler
= reap
;
349 sigemptyset(&sa
.sa_mask
);
350 sa
.sa_flags
= SA_NOCLDSTOP
;
352 sa
.sa_flags
|= SA_RESTART
;
354 sigaction(SIGCHLD
, &sa
, 0);
356 DA_UNSHIFT(&spawnopts
, (char *)spawnpath
);
357 if (!(f
& f_spawnopts
)) {
358 DA_PUSH(&spawnopts
, "-d");
359 DA_PUSH(&spawnopts
, (char *)dir
);
360 DA_PUSH(&spawnopts
, "-a");
361 DA_PUSH(&spawnopts
, (char *)sock
);
363 DA_PUSH(&spawnopts
, 0);
364 if (socketpair(PF_UNIX
, SOCK_STREAM
, 0, pfd
))
365 die(EXIT_FAILURE
, "error from socketpair: %s", strerror(errno
));
366 sigemptyset(&newmask
);
367 sigaddset(&newmask
, SIGCHLD
);
368 sigprocmask(SIG_BLOCK
, &newmask
, &oldmask
);
369 if ((kid
= fork()) < 0)
370 die(EXIT_FAILURE
, "fork failed: %s", strerror(errno
));
372 dup2(pfd
[1], STDIN_FILENO
);
373 dup2(pfd
[1], STDOUT_FILENO
);
379 execvp(DA(&spawnopts
)[0], DA(&spawnopts
));
380 die(127, "couldn't exec `%s': %s", spawnpath
, strerror(errno
));
382 sigprocmask(SIG_SETMASK
, &oldmask
, 0);
386 struct sockaddr_un sun
;
387 size_t sz
= strlen(sock
) + 1;
389 dstr_putf(&d
, "%s/%s", dir
, sock
);
390 if (d
.sz
+ 1 > sizeof(sun
.sun_path
))
391 die(EXIT_FAILURE
, "socket name `%s' too long", sock
);
392 memset(&sun
, 0, sizeof(sun
));
393 sun
.sun_family
= AF_UNIX
;
394 memcpy(sun
.sun_path
, d
.buf
, d
.sz
+ 1);
395 sz
= d
.sz
+ offsetof(struct sockaddr_un
, sun_path
) + 1;
397 if ((fd
= socket(PF_UNIX
, SOCK_STREAM
, 0)) < 0)
398 die(EXIT_FAILURE
, "error making socket: %s", strerror(errno
));
399 if (connect(fd
, (struct sockaddr
*)&sun
, sz
)) {
400 die(EXIT_FAILURE
, "error connecting to `%s': %s",
401 sun
.sun_path
, strerror(errno
));
407 die(EXIT_FAILURE
, "error becoming daemon: %s", strerror(errno
));
410 /* --- If we're meant to be interactive, do that --- */
412 if (!(f
& f_noinput
) && optind
== argc
) {
417 selbuf_init(&bu
, &sel
, STDIN_FILENO
, uline
, &bu
);
418 selbuf_init(&bs
, &sel
, fd
, sline
, &bs
);
420 if (sel_select(&sel
))
421 die(EXIT_FAILURE
, "select failed: %s", strerror(errno
));
425 /* --- If there's a command, submit it --- */
429 dstr_puts(&d
, argv
[optind
++]);
430 while (optind
< argc
) {
432 dstr_puts(&d
, argv
[optind
++]);
435 write(fd
, d
.buf
, d
.len
);
441 /* --- Pull everything else out of the box --- */
445 lbuf_init(&b
, cline
, 0);
447 openlog(QUIS
, 0, LOG_DAEMON
);
450 sa
.sa_handler
= sighup
;
452 sigemptyset(&sa
.sa_mask
);
453 sigaction(SIGHUP
, &sa
, 0);
462 sz
= lbuf_free(&b
, &p
);
465 if (errno
== EINTR
|| errno
== EAGAIN
|| errno
== EWOULDBLOCK
)
467 die(EXIT_FAILURE
, "read failed: %s", strerror(errno
));
471 lbuf_flush(&b
, p
, n
);
479 /*----- That's all, folks -------------------------------------------------*/