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/daemonize.h>
55 #include <mLib/darray.h>
56 #include <mLib/dstr.h>
57 #include <mLib/mdwopt.h>
58 #include <mLib/quis.h>
59 #include <mLib/report.h>
61 #include <mLib/selbuf.h>
64 #include <mLib/versioncmp.h>
70 /*----- Data structures ---------------------------------------------------*/
74 DA_DECL(string_v
, char *);
77 /*----- Static variables --------------------------------------------------*/
79 static const char *pidfile
= 0;
80 static const char *logname
= 0;
81 static FILE *logfp
= 0;
82 static unsigned f
= 0;
84 static const char *bgtag
= 0;
89 #define f_spawnopts 8u
96 /*----- Main code ---------------------------------------------------------*/
98 static void reap(int sig
)
101 while (waitpid(-1, 0, WNOHANG
) > 0)
106 static void writelog(const char *cat
, const char *msg
)
110 struct tm
*tm
= localtime(&t
);
111 strftime(buf
, sizeof(buf
), "%Y-%m-%d %H:%M:%S", tm
);
112 fprintf(logfp
, "%s %s: %s\n", buf
, cat
, msg
);
115 static void checkbg(char **p
)
117 char *q
= str_getword(p
);
119 die(EXIT_FAILURE
, "missing background tag");
120 if (!bgtag
|| strcmp(bgtag
, q
) != 0)
121 die(EXIT_FAILURE
, "unexpected background tag `%s'", q
);
124 static void checkfg(void)
127 die(EXIT_FAILURE
, "unexpected foreground response");
130 static void cline(char *p
, size_t len
, void *b
)
135 die(EXIT_FAILURE
, "server dropped the connection");
141 if (strcmp(q
, "WARN") == 0) {
143 syslog(LOG_WARNING
, "%s", p
);
145 writelog("warning", p
);
147 fprintf(stderr
, "Warning: %s\n", p
);
148 } else if (strcmp(q
, "TRACE") == 0) {
150 syslog(LOG_DEBUG
, "%s", p
);
152 writelog("debug", p
);
153 } else if (!(f
& f_command
)) {
155 syslog(LOG_ERR
, "unexpected output `%s %s'", q
, p
);
158 dstr_putf(&d
, "unexpected output `%s %s'", q
, p
);
159 writelog("error", d
.buf
);
162 } else if (strcmp(q
, "FAIL") == 0) {
164 die(EXIT_FAILURE
, "%s", p
);
165 } else if (strcmp(q
, "INFO") == 0) {
169 } else if (strcmp(q
, "OK") == 0) {
172 } else if (strcmp(q
, "BGDETACH") == 0) {
174 die(EXIT_FAILURE
, "repeat detach");
176 } else if (strcmp(q
, "BGOK") == 0) {
179 } else if (strcmp(q
, "BGINFO") == 0) {
183 } else if (strcmp(q
, "BGFAIL") == 0) {
185 die(EXIT_FAILURE
, "%s", p
);
187 die(EXIT_FAILURE
, "unexpected output `%s %s'", q
, p
);
190 static void sline(char *p
, size_t len
, void *b
)
194 moan("server closed the connection");
201 static void uline(char *p
, size_t len
, void *b
)
210 if (write(fd
, p
, len
+ 1) != len
+ 1)
211 moan("write failed: %s", strerror(errno
));
215 static void setup(const char *cmd
)
224 errno
= EIO
; /* Relax: be vague */
225 if (write(fd
, d
.buf
, d
.len
) != d
.len
) {
226 die(EXIT_FAILURE
, "error sending setup command `%s': %s",
227 cmd
, strerror(errno
));
231 n
= read(fd
, &ch
, 1);
233 die(EXIT_FAILURE
, "unexpected EOF during setup");
235 die(EXIT_FAILURE
, "error receiving reply to `%s': %s",
236 cmd
, strerror(errno
));
245 else if (strcmp(q
, "OK") == 0)
247 else if (strcmp(q
, "FAIL") == 0)
248 die(EXIT_FAILURE
, "setup command `%s' failed: %s", cmd
, p
);
254 static void logfile(const char *name
)
258 if ((fp
= fopen(name
, "a")) != 0) {
262 setvbuf(logfp
, 0, _IOLBF
, BUFSIZ
);
265 dstr_putf(&d
, "error opening logfile `%s': %s", name
, strerror(errno
));
267 writelog("error", d
.buf
);
269 die(EXIT_FAILURE
, d
.buf
);
271 syslog(LOG_ERR
, d
.buf
);
276 static void sighup(int sig
, void *v
) { logfile(logname
); }
278 static void cleanup(void)
284 static void sigdie(int sig
)
287 signal(sig
, SIG_DFL
);
291 static void version(FILE *fp
)
292 { pquis(fp
, "$, TrIPE version " VERSION
"\n"); }
294 static void usage(FILE *fp
)
298 $ [-w] [-OPTIONS] [COMMAND [ARGS]...]\n\
299 $ [-Dl] [-f FILE] [-OPTIONS]\n\
301 [-s] [-d DIRECTORY] [-a SOCKET] [-P PIDFILE]\n\
302 [-p PROGRAM] [-S ARG,ARG,...]\n\
306 static void help(FILE *fp
)
315 -h, --help Show this help text.\n\
316 -v, --version Show version number.\n\
317 -u, --usage Show brief usage message.\n\
319 -D, --daemon Become a background task after connecting.\n\
320 -d, --directory=DIR Select current directory [default " CONFIGDIR
"].\n\
321 -a, --admin-socket=FILE Select socket to connect to\n\
322 [default " SOCKETDIR
"/tripesock].\n\
323 -P, --pidfile=FILE Write process-id to FILE.\n\
325 -s, --spawn Start server rather than connecting.\n\
326 -p, --spawn-path=PATH Specify path to executable.\n\
327 -S, --spawn-args=ARGS Specify comma-separated arguments.\n\
329 -l, --syslog Log messages to system log.\n\
330 -f, --logfile=FILE Log messages to FILE.\n\
331 -w, --warnings Show warnings when running commands.\n\
335 int main(int argc
, char *argv
[])
337 const char *dir
= CONFIGDIR
;
338 const char *sock
= SOCKETDIR
"/tripesock";
339 const char *spawnpath
= "tripe";
340 string_v spawnopts
= DA_INIT
;
346 if ((p
= getenv("TRIPEDIR")) != 0)
348 if ((p
= getenv("TRIPESOCK")) != 0)
351 /* --- Parse the arguments --- */
354 static const struct option opts
[] = {
355 { "help", 0, 0, 'h' },
356 { "version", 0, 0, 'v' },
357 { "usage", 0, 0, 'u' },
358 { "daemon", 0, 0, 'D' },
359 { "directory", OPTF_ARGREQ
, 0, 'd' },
360 { "admin-socket", OPTF_ARGREQ
, 0, 'a' },
361 { "spawn", 0, 0, 's' },
362 { "spawn-path", OPTF_ARGREQ
, 0, 'p' },
363 { "spawn-args", OPTF_ARGREQ
, 0, 'S' },
364 { "syslog", 0, 0, 'l' },
365 { "logfile", OPTF_ARGREQ
, 0, 'f' },
366 { "warnings", 0, 0, 'w' },
367 { "pidfile", OPTF_ARGREQ
, 0, 'P' },
371 int i
= mdwopt(argc
, argv
, "+hvuDd:a:sp:S:lwf:nP:", opts
, 0, 0, 0);
385 f
|= f_daemon
| f_noinput
;
401 f
|= f_spawn
| f_spawnopts
;
402 for (p
= strtok(optarg
, ","); p
; p
= strtok(0, ","))
403 DA_PUSH(&spawnopts
, p
);
406 f
|= f_syslog
| f_noinput
;
423 if ((f
& f_bogus
) || ((f
& f_noinput
) && optind
< argc
)) {
428 /* --- Set various things up --- */
431 die(EXIT_FAILURE
, "couldn't set `%s' as current directory: %s",
432 dir
, strerror(errno
));
436 if (!pidfile
&& (f
& f_daemon
) && ((f
& f_syslog
) || logname
))
437 pidfile
= "tripectl.pid";
438 if (pidfile
&& (pidfp
= fopen(pidfile
, "w")) == 0) {
439 die(EXIT_FAILURE
, "couldn't open `%s' for writing: %s",
440 pidfile
, strerror(errno
));
442 signal(SIGINT
, sigdie
);
443 signal(SIGQUIT
, sigdie
);
444 signal(SIGTERM
, sigdie
);
447 /* --- Connect to the server --- */
453 sigset_t newmask
, oldmask
;
455 sa
.sa_handler
= reap
;
456 sigemptyset(&sa
.sa_mask
);
457 sa
.sa_flags
= SA_NOCLDSTOP
;
459 sa
.sa_flags
|= SA_RESTART
;
461 sigaction(SIGCHLD
, &sa
, 0);
463 DA_UNSHIFT(&spawnopts
, (char *)sock
);
464 DA_UNSHIFT(&spawnopts
, "-a");
465 DA_UNSHIFT(&spawnopts
, "-d.");
466 DA_UNSHIFT(&spawnopts
, (char *)spawnpath
);
467 DA_PUSH(&spawnopts
, 0);
468 if (socketpair(PF_UNIX
, SOCK_STREAM
, 0, pfd
))
469 die(EXIT_FAILURE
, "error from socketpair: %s", strerror(errno
));
470 sigemptyset(&newmask
);
471 sigaddset(&newmask
, SIGCHLD
);
472 sigprocmask(SIG_BLOCK
, &newmask
, &oldmask
);
473 if ((kid
= fork()) < 0)
474 die(EXIT_FAILURE
, "fork failed: %s", strerror(errno
));
476 dup2(pfd
[1], STDIN_FILENO
);
477 dup2(pfd
[1], STDOUT_FILENO
);
487 execvp(DA(&spawnopts
)[0], DA(&spawnopts
));
488 die(127, "couldn't exec `%s': %s", spawnpath
, strerror(errno
));
490 sigprocmask(SIG_SETMASK
, &oldmask
, 0);
494 struct sockaddr_un sun
;
495 size_t sz
= strlen(sock
) + 1;
496 if (sz
> sizeof(sun
.sun_path
))
497 die(EXIT_FAILURE
, "socket name `%s' too long", sock
);
498 memset(&sun
, 0, sizeof(sun
));
499 sun
.sun_family
= AF_UNIX
;
500 memcpy(sun
.sun_path
, sock
, sz
);
501 sz
= sz
+ offsetof(struct sockaddr_un
, sun_path
);
502 if ((fd
= socket(PF_UNIX
, SOCK_STREAM
, 0)) < 0)
503 die(EXIT_FAILURE
, "error making socket: %s", strerror(errno
));
504 if (connect(fd
, (struct sockaddr
*)&sun
, sz
)) {
505 die(EXIT_FAILURE
, "error connecting to `%s': %s",
506 sun
.sun_path
, strerror(errno
));
512 die(EXIT_FAILURE
, "error becoming daemon: %s", strerror(errno
));
515 fprintf(pidfp
, "%li\n", (long)getpid());
518 signal(SIGPIPE
, SIG_IGN
);
520 /* --- If we're meant to be interactive, do that --- */
523 setup("WATCH -A+tw");
524 if (!(f
& f_noinput
) && optind
== argc
) {
529 selbuf_init(&bu
, &sel
, STDIN_FILENO
, uline
, &bu
);
530 selbuf_init(&bs
, &sel
, fd
, sline
, &bs
);
532 if (sel_select(&sel
) && errno
!= EINTR
&& errno
!= EAGAIN
)
533 die(EXIT_FAILURE
, "select failed: %s", strerror(errno
));
537 /* --- If there's a command, submit it --- */
541 setup((f
& f_warn
) ?
"WATCH -A+w" : "WATCH -A");
542 while (optind
< argc
)
543 u_quotify(&d
, argv
[optind
++]);
546 if (write(fd
, d
.buf
, d
.len
) != d
.len
|| shutdown(fd
, 1))
547 die(EXIT_FAILURE
, "write failed: %s", strerror(errno
));
552 /* --- Pull everything else out of the box --- */
560 selbuf_init(&b
, &sel
, fd
, cline
, 0);
563 openlog(QUIS
, 0, LOG_DAEMON
);
566 sig_add(&hup
, SIGHUP
, sighup
, 0);
569 if (sel_select(&sel
) && errno
!= EINTR
&& errno
!= EAGAIN
)
570 die(EXIT_FAILURE
, "select failed: %s", strerror(errno
));
577 /*----- That's all, folks -------------------------------------------------*/