ea86ec5c4fa6c563acaaed49b6c7af7351f487c6
5 * (c) 2001 Straylight/Edgeware
8 /*----- Licensing notice --------------------------------------------------*
10 * This file is part of Trivial IP Encryption (TrIPE).
12 * TrIPE is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
17 * TrIPE is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with TrIPE; if not, write to the Free Software Foundation,
24 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
27 /*----- Header files ------------------------------------------------------*/
39 #include <sys/types.h>
46 #include <sys/socket.h>
48 #include <arpa/inet.h>
51 #include <mLib/alloc.h>
52 #include <mLib/daemonize.h>
53 #include <mLib/darray.h>
54 #include <mLib/dstr.h>
55 #include <mLib/mdup.h>
56 #include <mLib/mdwopt.h>
57 #include <mLib/quis.h>
58 #include <mLib/report.h>
60 #include <mLib/selbuf.h>
63 #include <mLib/versioncmp.h>
68 #define IGNORE(x) do if (x); while (0)
70 /*----- Data structures ---------------------------------------------------*/
74 DA_DECL(string_v
, char *);
77 /*----- Static variables --------------------------------------------------*/
80 static const char *pidfile
= 0;
81 static const char *logname
= 0;
82 static FILE *logfp
= 0;
83 static unsigned f
= 0;
85 static const char *bgtag
= 0;
90 #define f_spawnopts 8u
98 /*----- Main code ---------------------------------------------------------*/
100 static void reap(int sig
)
103 while (waitpid(-1, 0, WNOHANG
) > 0)
108 static void writelog(const char *cat
, const char *msg
)
112 struct tm
*tm
= localtime(&t
);
113 strftime(buf
, sizeof(buf
), "%Y-%m-%d %H:%M:%S", tm
);
114 fprintf(logfp
, "%s %s: %s\n", buf
, cat
, msg
);
117 static void checkbg(char **p
)
119 char *q
= str_getword(p
);
121 die(EXIT_FAILURE
, "missing background tag");
122 if (!bgtag
|| strcmp(bgtag
, q
) != 0)
123 die(EXIT_FAILURE
, "unexpected background tag `%s'", q
);
126 static void dolog(int prio
, const char *msg
, ...)
133 dstr_vputf(&d
, msg
, &ap
);
135 if (f
& f_syslog
) syslog(prio
, "%s", d
.buf
);
138 case LOG_WARNING
: cat
= "warning"; break;
139 case LOG_DEBUG
: cat
= "debug"; break;
140 case LOG_ERR
: cat
= "error"; break;
141 default: cat
= "message"; break;
143 writelog(cat
, d
.buf
);
145 if (prio
== LOG_WARNING
&& (f
& f_warn
))
146 fprintf(stderr
, "Warning: %s\n", d
.buf
);
150 static void checkfg(void)
151 { if (bgtag
) die(EXIT_FAILURE
, "unexpected foreground response"); }
153 static void cline(char *p
, size_t len
, void *b
)
158 die(EXIT_FAILURE
, "server dropped the connection");
165 if (strcmp(q
, "WARN") == 0)
166 dolog(LOG_WARNING
, p
);
167 else if (strcmp(q
, "TRACE") == 0)
169 else if (!(f
& f_command
))
170 dolog(LOG_ERR
, "unexpected output `%s %s'", q
, p
);
171 else if (strcmp(q
, "FAIL") == 0) {
173 die(EXIT_FAILURE
, "%s", p
);
174 } else if (strcmp(q
, "INFO") == 0) {
178 } else if (strcmp(q
, "OK") == 0) {
181 } else if (strcmp(q
, "BGDETACH") == 0) {
183 die(EXIT_FAILURE
, "repeat detach");
185 } else if (strcmp(q
, "BGOK") == 0) {
188 } else if (strcmp(q
, "BGINFO") == 0) {
192 } else if (strcmp(q
, "BGFAIL") == 0) {
194 die(EXIT_FAILURE
, "%s", p
);
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");
210 static void uline(char *p
, size_t len
, void *b
)
219 if (write(fd
, p
, len
+ 1) != len
+ 1)
220 moan("write failed: %s", strerror(errno
));
224 static void eline(char *p
, size_t len
, void *b
)
227 dolog(LOG_WARNING
, "(stderr): %s", p
);
234 static void setup(const char *cmd
)
243 errno
= EIO
; /* Relax: be vague */
244 if (write(fd
, d
.buf
, d
.len
) != d
.len
) {
245 die(EXIT_FAILURE
, "error sending setup command `%s': %s",
246 cmd
, strerror(errno
));
250 n
= read(fd
, &ch
, 1);
252 die(EXIT_FAILURE
, "unexpected EOF during setup");
254 die(EXIT_FAILURE
, "error receiving reply to `%s': %s",
255 cmd
, strerror(errno
));
264 else if (strcmp(q
, "OK") == 0)
266 else if (strcmp(q
, "FAIL") == 0)
267 die(EXIT_FAILURE
, "setup command `%s' failed: %s", cmd
, p
);
273 static void logfile(const char *name
)
277 if ((fp
= fopen(name
, "a")) != 0) {
281 setvbuf(logfp
, 0, _IOLBF
, BUFSIZ
);
284 dstr_putf(&d
, "error opening logfile `%s': %s", name
, strerror(errno
));
286 writelog("error", d
.buf
);
288 die(EXIT_FAILURE
, d
.buf
);
290 syslog(LOG_ERR
, "%s", d
.buf
);
295 static void sighup(int sig
, void *v
) { logfile(logname
); }
297 static void cleanup(void) { if (pidfile
) unlink(pidfile
); }
299 static void sigdie(int sig
)
300 { cleanup(); signal(sig
, SIG_DFL
); raise(sig
); }
302 static void putarg(string_v
*av
, const char *fmt
, ...)
308 dstr_vputf(&d
, fmt
, &ap
);
311 DA_UNSHIFT(av
, xstrdup(d
.buf
));
315 static void version(FILE *fp
)
316 { pquis(fp
, "$, TrIPE version " VERSION
"\n"); }
318 static void usage(FILE *fp
)
322 $ [-w] [-OPTIONS] [COMMAND [ARGS]...]\n\
323 $ [-Dl] [-f FILE] [-OPTIONS]\n\
325 [-s] [-d DIRECTORY] [-a SOCKET] [-P PIDFILE]\n\
326 [-p PROGRAM] [-S ARG,ARG,...]\n\
330 static void help(FILE *fp
)
339 -h, --help Show this help text.\n\
340 -v, --version Show version number.\n\
341 -u, --usage Show brief usage message.\n\
343 -D, --daemon Become a background task after connecting.\n\
344 -d, --directory=DIR Select current directory [default " CONFIGDIR
"].\n\
345 -U, --setuid=USER Set uid to USER after initialization.\n\
346 -G, --setgid=GROUP Set gid to GROUP after initialization.\n\
347 -a, --admin-socket=FILE Select socket to connect to\n\
348 [default " SOCKETDIR
"/tripesock].\n\
349 -P, --pidfile=FILE Write process-id to FILE.\n\
351 -s, --spawn Start server rather than connecting.\n\
352 -p, --spawn-path=PATH Specify path to executable.\n\
353 -S, --spawn-args=ARGS Specify comma-separated arguments.\n\
355 -l, --syslog Log messages to system log.\n\
356 -f, --logfile=FILE Log messages to FILE.\n\
357 -w, --warnings Show warnings when running commands.\n\
361 int main(int argc
, char *argv
[])
363 const char *dir
= CONFIGDIR
;
364 const char *sock
= SOCKETDIR
"/tripesock";
365 const char *spawnpath
= "tripe";
366 string_v spawnopts
= DA_INIT
;
377 sigset_t newmask
, oldmask
;
378 struct sockaddr_un sun
;
385 if ((p
= getenv("TRIPEDIR")) != 0)
387 if ((p
= getenv("TRIPESOCK")) != 0)
390 /* --- Parse the arguments --- */
393 static const struct option opts
[] = {
394 { "help", 0, 0, 'h' },
395 { "version", 0, 0, 'v' },
396 { "usage", 0, 0, 'u' },
397 { "daemon", 0, 0, 'D' },
398 { "uid", OPTF_ARGREQ
, 0, 'U' },
399 { "setuid", OPTF_ARGREQ
, 0, 'U' },
400 { "gid", OPTF_ARGREQ
, 0, 'G' },
401 { "setgid", OPTF_ARGREQ
, 0, 'G' },
402 { "directory", OPTF_ARGREQ
, 0, 'd' },
403 { "admin-socket", OPTF_ARGREQ
, 0, 'a' },
404 { "spawn", 0, 0, 's' },
405 { "spawn-path", OPTF_ARGREQ
, 0, 'p' },
406 { "spawn-args", OPTF_ARGREQ
, 0, 'S' },
407 { "syslog", 0, 0, 'l' },
408 { "logfile", OPTF_ARGREQ
, 0, 'f' },
409 { "warnings", 0, 0, 'w' },
410 { "pidfile", OPTF_ARGREQ
, 0, 'P' },
414 i
= mdwopt(argc
, argv
, "+hvuDU:G:d:a:sp:S:lwf:nP:", opts
, 0, 0, 0);
428 f
|= f_daemon
| f_noinput
;
431 u
= u_getuser(optarg
, &g
);
434 g
= u_getgroup(optarg
);
450 f
|= f_spawn
| f_spawnopts
;
451 for (p
= strtok(optarg
, ","); p
; p
= strtok(0, ","))
452 DA_PUSH(&spawnopts
, p
);
455 f
|= f_syslog
| f_noinput
;
472 if ((f
& f_bogus
) || ((f
& f_noinput
) && optind
< argc
)) {
477 /* --- Set various things up --- */
480 die(EXIT_FAILURE
, "couldn't set `%s' as current directory: %s",
481 dir
, strerror(errno
));
483 if (!pidfile
&& (f
& f_daemon
) && ((f
& f_syslog
) || logname
))
484 pidfile
= "tripectl.pid";
485 if (pidfile
&& (pidfp
= fopen(pidfile
, "w")) == 0) {
486 die(EXIT_FAILURE
, "couldn't open `%s' for writing: %s",
487 pidfile
, strerror(errno
));
491 signal(SIGINT
, sigdie
);
492 signal(SIGQUIT
, sigdie
);
493 signal(SIGTERM
, sigdie
);
496 /* --- Connect to the server --- */
499 sa
.sa_handler
= reap
;
500 sigemptyset(&sa
.sa_mask
);
501 sa
.sa_flags
= SA_NOCLDSTOP
;
503 sa
.sa_flags
|= SA_RESTART
;
505 sigaction(SIGCHLD
, &sa
, 0);
507 DA_PUSH(&spawnopts
, 0);
508 if (g
!= (gid_t
)-1) putarg(&spawnopts
, "-G%lu", (unsigned long)g
);
509 if (u
!= (uid_t
)-1) putarg(&spawnopts
, "-U%lu", (unsigned long)u
);
510 putarg(&spawnopts
, "-a%s", sock
);
511 putarg(&spawnopts
, "-d.");
512 putarg(&spawnopts
, "-F");
513 putarg(&spawnopts
, "%s", spawnpath
);
514 if (socketpair(PF_UNIX
, SOCK_STREAM
, 0, pfd
) || pipe(efd
))
515 die(EXIT_FAILURE
, "error from socketpair: %s", strerror(errno
));
516 sigemptyset(&newmask
);
517 sigaddset(&newmask
, SIGCHLD
);
518 sigprocmask(SIG_BLOCK
, &newmask
, &oldmask
);
519 if ((kid
= fork()) < 0)
520 die(EXIT_FAILURE
, "fork failed: %s", strerror(errno
));
522 close(pfd
[0]); close(efd
[0]);
523 md
[0].cur
= pfd
[1]; md
[0].want
= STDIN_FILENO
;
524 md
[1].cur
= pfd
[1]; md
[1].want
= STDOUT_FILENO
;
525 md
[2].cur
= efd
[1]; md
[2].want
= STDERR_FILENO
;
527 if (pidfp
) fclose(pidfp
);
529 if (f
& f_daemon
) detachtty();
530 execvp(DA(&spawnopts
)[0], DA(&spawnopts
));
531 die(127, "couldn't exec `%s': %s", spawnpath
, strerror(errno
));
533 sigprocmask(SIG_SETMASK
, &oldmask
, 0);
535 close(pfd
[1]); close(efd
[1]);
536 selbuf_init(&be
, &sel
, efd
[0], eline
, &be
);
538 sz
= strlen(sock
) + 1;
539 if (sz
> sizeof(sun
.sun_path
))
540 die(EXIT_FAILURE
, "socket name `%s' too long", sock
);
541 memset(&sun
, 0, sizeof(sun
));
542 sun
.sun_family
= AF_UNIX
;
543 memcpy(sun
.sun_path
, sock
, sz
);
544 sz
= sz
+ offsetof(struct sockaddr_un
, sun_path
);
545 if ((fd
= socket(PF_UNIX
, SOCK_STREAM
, 0)) < 0)
546 die(EXIT_FAILURE
, "error making socket: %s", strerror(errno
));
547 if (connect(fd
, (struct sockaddr
*)&sun
, sz
)) {
548 die(EXIT_FAILURE
, "error connecting to `%s': %s",
549 sun
.sun_path
, strerror(errno
));
553 f
|= f_losing
; /* pessimism */
559 die(EXIT_FAILURE
, "error becoming daemon: %s", strerror(errno
));
562 fprintf(pidfp
, "%li\n", (long)getpid());
565 signal(SIGPIPE
, SIG_IGN
);
567 /* --- If we're meant to be interactive, do that --- */
570 setup("WATCH -A+tw");
571 if (!(f
& f_noinput
) && optind
== argc
) {
572 selbuf_init(&bu
, &sel
, STDIN_FILENO
, uline
, &bu
);
573 selbuf_init(&bs
, &sel
, fd
, sline
, &bs
);
575 if (sel_select(&sel
) && errno
!= EINTR
&& errno
!= EAGAIN
)
576 die(EXIT_FAILURE
, "select failed: %s", strerror(errno
));
580 /* --- If there's a command, submit it --- */
583 setup((f
& f_warn
) ?
"WATCH -A+w" : "WATCH -A");
584 while (optind
< argc
)
585 u_quotify(&d
, argv
[optind
++]);
588 if (write(fd
, d
.buf
, d
.len
) != d
.len
|| shutdown(fd
, 1))
589 die(EXIT_FAILURE
, "write failed: %s", strerror(errno
));
594 /* --- Pull everything else out of the box --- */
596 selbuf_init(&bs
, &sel
, fd
, cline
, 0);
599 openlog(QUIS
, 0, LOG_DAEMON
);
601 sig_add(&hup
, SIGHUP
, sighup
, 0);
603 if (sel_select(&sel
) && errno
!= EINTR
&& errno
!= EAGAIN
)
604 die(EXIT_FAILURE
, "select failed: %s", strerror(errno
));
610 /*----- That's all, folks -------------------------------------------------*/