[tripe] / client.c

/* -*-c-*-
 *
 * $Id: client.c,v 1.10 2003/05/17 10:59:19 mdw Exp $
 *
 * Client for TrIPE
 *
 * (c) 2001 Straylight/Edgeware
 */

/*----- Licensing notice --------------------------------------------------* 
 *
 * This file is part of Trivial IP Encryption (TrIPE).
 *
 * TrIPE is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 * 
 * TrIPE is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with TrIPE; if not, write to the Free Software Foundation,
 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

/*----- Revision history --------------------------------------------------* 
 *
 * $Log: client.c,v $
 * Revision 1.10  2003/05/17 10:59:19  mdw
 * Put a newline in the pidfile.
 *
 * Revision 1.9  2002/01/13 14:57:18  mdw
 * Track @lbuf@ changes in mLib.
 *
 * Revision 1.8  2001/06/19 22:09:37  mdw
 * Move the program name to the right place when constructing the arguments
 * to pass to a new server.
 *
 * Revision 1.7  2001/02/22 09:07:54  mdw
 * Write a pidfile on request, and delete it when finished.
 *
 * Revision 1.6  2001/02/22 09:06:08  mdw
 * Fix logfile rotation to avoid program collapse.
 *
 * Revision 1.5  2001/02/16 21:23:39  mdw
 * Use reliable signal handling for reopening logs.
 *
 * Revision 1.4  2001/02/06 09:34:53  mdw
 * Change ERR response to FAIL for consistency with other programs.
 *
 * Revision 1.3  2001/02/04 17:10:15  mdw
 * Reopen logfiles on receipt of @SIGHUP@ (not done very well).  Don't
 * change directory -- just mangle pathnames instead.
 *
 * Revision 1.2  2001/02/04 01:17:54  mdw
 * Create a configuration header file to tidy up command lines.
 *
 * Revision 1.1  2001/02/03 20:26:37  mdw
 * Initial checkin.
 *
 */

/*----- Header files ------------------------------------------------------*/

#include "config.h"

#include <ctype.h>
#include <errno.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>

#include <sys/types.h>
#include <sys/time.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/wait.h>
#include <syslog.h>

#include <sys/socket.h>
#include <sys/un.h>
#include <arpa/inet.h>
#include <netdb.h>

#include <mLib/alloc.h>
#include <mLib/darray.h>
#include <mLib/dstr.h>
#include <mLib/mdwopt.h>
#include <mLib/quis.h>
#include <mLib/report.h>
#include <mLib/sel.h>
#include <mLib/selbuf.h>
#include <mLib/sig.h>
#include <mLib/str.h>

#include "util.h"

#undef sun

/*----- Data structures ---------------------------------------------------*/

#ifndef STRING_V
#  define STRING_V
   DA_DECL(string_v, char *);
#endif

/*----- Static variables --------------------------------------------------*/

static const char *pidfile = 0;
static const char *logname = 0;
static FILE *logfp = 0;
static unsigned f = 0;
static int fd;

#define f_bogus 1u
#define f_spawn 2u
#define f_daemon 4u
#define f_spawnopts 8u
#define f_syslog 16u
#define f_command 32u
#define f_noinput 64u
#define f_warn 128u
#define f_uclose 256u

/*----- Main code ---------------------------------------------------------*/

static void reap(int sig)
{
  int e = errno;
  while (waitpid(-1, 0, WNOHANG) > 0)
    ;
  errno = e;
}

static void writelog(const char *cat, const char *msg)
{
  char buf[256];
  time_t t = time(0);
  struct tm *tm = localtime(&t);
  strftime(buf, sizeof(buf), "%Y-%m-%d %H:%M:%S", tm);
  fprintf(logfp, "%s %s: %s\n", buf, cat, msg);
}

static void cline(char *p, size_t len, void *b)
{
  char *q;
  if (!p) {
    if (f & f_command)
      die(EXIT_FAILURE, "server dropped the connection");
    exit(0);
  }
  q = str_getword(&p);
  if (!q)
    return;
  if (strcmp(q, "WARN") == 0) {
    if (f & f_syslog)
      syslog(LOG_WARNING, "%s", p);
    if (logfp)
      writelog("warning", p);
    if (f & f_warn)
      fprintf(stderr, "Warning: %s\n", p);
  } else if (strcmp(q, "TRACE") == 0) {
    if (f & f_syslog)
      syslog(LOG_DEBUG, "%s", p);
    if (logfp)
      writelog("debug", p);
  } else if (!(f & f_command)) {
    if (f & f_syslog)
      syslog(LOG_ERR, "unexpected output `%s %s'", q, p);
    if (logfp) {
      dstr d = DSTR_INIT;
      dstr_putf(&d, "unexpected output `%s %s'", q, p);
      writelog("error", d.buf);
      dstr_destroy(&d);
    }
  } else if (strcmp(q, "FAIL") == 0)
    die(EXIT_FAILURE, "%s", p);
  else if (strcmp(q, "INFO") == 0)
    puts(p);
  else if (strcmp(q, "OK") == 0)
    exit(0);
  else
    die(EXIT_FAILURE, "unexpected output `%s %s'", q, p); 
}

static void sline(char *p, size_t len, void *b)
{
  if (!p) {
    if (!(f & f_uclose))
      moan("server closed the connection");
    exit(0);
  }
  puts(p);
}

static void uline(char *p, size_t len, void *b)
{
  if (!p) {
    selbuf_destroy(b);
    shutdown(fd, 1);
    f |= f_uclose;
  } else {
    p[len] = '\n';
    write(fd, p, len + 1);
  }
}

static void logfile(const char *name)
{
  FILE *fp;

  if ((fp = fopen(name, "a")) != 0) {
    if (logfp)
      fclose(logfp);
    logfp =  fp;
    setvbuf(logfp, 0, _IOLBF, BUFSIZ);
  } else {
    dstr d = DSTR_INIT;
    dstr_putf(&d, "error opening logfile `%s': %s", name, strerror(errno));
    if (logfp)
      writelog("error", d.buf);
    else if (logname)
      die(EXIT_FAILURE, d.buf);
    if (f & f_syslog)
      syslog(LOG_ERR, d.buf);
    dstr_destroy(&d);
  }
}

static void sighup(int sig, void *v)
{
  logfile(logname);
}

static void cleanup(void)
{
  if (pidfile)
    unlink(pidfile);
}

static void sigdie(int sig)
{
  cleanup();
  signal(sig, SIG_DFL);
  raise(sig);
}

static void version(FILE *fp)
{
  pquis(fp, "$, TrIPE version " VERSION "\n");
}

static void usage(FILE *fp)
{
  pquis(fp, "\
Usage:\n\
	$ [-w] [-options] [command [args]...]\n\
	$ [-Dl] [-f file] [-options]\n\
Options:\n\
	[-s] [-d directory] [-a socket] [-P pidfile]\n\
	[-p program] [-S arg,arg,...]\n\
");
}

static void help(FILE *fp)
{
  version(fp);
  fputc('\n', fp);
  usage(fp);
  fputs("\
\n\
Options in full:\n\
\n\
-h, --help		Show this help text.\n\
-v, --version		Show version number.\n\
-u, --usage		Show brief usage message.\n\
\n\
-D, --daemon		Become a background task after connecting.\n\
-d, --directory=DIR	Select current directory [default /var/lib/tripe]\n\
-a, --admin-socket=FILE	Select socket to connect to.\n\
-P, --pidfile=FILE	Write process-id to FILE.\n\
\n\
-s, --spawn		Start server rather than connecting.\n\
-p, --spawn-path=PATH	Specify path to executable.\n\
-S, --spawn-args=ARGS	Specify comma-separated arguments.\n\
\n\
-l, --syslog		Log messages to system log.\n\
-f, --logfile=FILE	Log messages to FILE.\n\
-w, --warnings		Show warnings when running commands.\n\
", fp);
}

int main(int argc, char *argv[])
{
  const char *dir = "/var/lib/tripe";
  const char *sock = "tripesock";
  const char *spawnpath = "tripe";
  string_v spawnopts = DA_INIT;
  char *p;
  FILE *pidfp = 0;

  ego(argv[0]);

  if ((p = getenv("TRIPEDIR")) != 0)
    dir = p;

  /* --- Parse the arguments --- */

  for (;;) {
    static const struct option opts[] = {
      { "help",		0,		0,	'h' },
      { "version",	0,		0,	'v' },
      { "usage",	0,		0,	'u' },
      { "daemon",	0,		0,	'D' },
      { "directory",	OPTF_ARGREQ,	0,	'd' },
      { "admin-socket",	OPTF_ARGREQ,	0,	'a' },
      { "spawn",	0,		0,	's' },
      { "spawn-path",	OPTF_ARGREQ,	0,	'p' },
      { "spawn-args",	OPTF_ARGREQ,	0,	'S' },
      { "syslog",	0,		0,	'l' },
      { "logfile",	OPTF_ARGREQ,	0,	'f' },
      { "warnings",	0,		0,	'w' },
      { "pidfile",	OPTF_ARGREQ,	0,	'P' },
      { 0,		0,		0,	0 }
    };

    int i = mdwopt(argc, argv, "+hvuDd:a:sp:S:lwf:nP:", opts, 0, 0, 0);
    if (i < 0)
      break;
    switch (i) {
      case 'h':
	help(stdout);
	exit(0);
      case 'v':
	version(stdout);
	exit(0);
      case 'u':
	usage(stdout);
	exit(0);
      case 'D':
	f |= f_daemon | f_noinput;
	break;
      case 'd':
	dir = optarg;
	break;
      case 'a':
	sock = optarg;
	break;
      case 's':
	f |= f_spawn;
	break;
      case 'p':
	f |= f_spawn;
	spawnpath = optarg;
	break;
      case 'S':
	f |= f_spawn | f_spawnopts;
	for (p = strtok(optarg, ","); p; p = strtok(0, ","))
	  DA_PUSH(&spawnopts, p);
	break;
      case 'l':
	f |= f_syslog | f_noinput;
	break;
      case 'w':
	f |= f_warn;
	break;
      case 'f':
	logname = optarg;
	f |= f_noinput;
	break;
      case 'P':
	pidfile = optarg;
	break;
      default:
	f |= f_bogus;
	break;
    }
  }
  if ((f & f_bogus) || ((f & f_noinput) && optind < argc)) {
    usage(stderr);
    exit(EXIT_FAILURE);
  }

  /* --- Set various things up --- */

  if (chdir(dir)) {
    die(EXIT_FAILURE, "couldn't set `%s' as current directory: %s",
	dir, strerror(errno));
  }
  if (logname)
    logfile(logname);
  if (!pidfile && (f & f_daemon) && ((f & f_syslog) || logname))
    pidfile = "tripectl.pid";
  if (pidfile && (pidfp = fopen(pidfile, "w")) == 0) {
    die(EXIT_FAILURE, "couldn't open `%s' for writing: %s",
	pidfile, strerror(errno));
  }
  signal(SIGINT, sigdie);
  signal(SIGQUIT, sigdie);
  signal(SIGTERM, sigdie);
  atexit(cleanup);

  /* --- Connect to the server --- */

  if (f & f_spawn) {
    int pfd[2];
    pid_t kid;
    struct sigaction sa;
    sigset_t newmask, oldmask;

    sa.sa_handler = reap;
    sigemptyset(&sa.sa_mask);
    sa.sa_flags = SA_NOCLDSTOP;
#ifdef SA_RESTART
    sa.sa_flags |= SA_RESTART;
#endif
    sigaction(SIGCHLD, &sa, 0);

    DA_UNSHIFT(&spawnopts, (char *)sock);
    DA_UNSHIFT(&spawnopts, "-a");
    DA_UNSHIFT(&spawnopts, "-d.");
    DA_UNSHIFT(&spawnopts, (char *)spawnpath);
    DA_PUSH(&spawnopts, 0);
    if (socketpair(PF_UNIX, SOCK_STREAM, 0, pfd))
      die(EXIT_FAILURE, "error from socketpair: %s", strerror(errno));
    sigemptyset(&newmask);
    sigaddset(&newmask, SIGCHLD);
    sigprocmask(SIG_BLOCK, &newmask, &oldmask);
    if ((kid = fork()) < 0)
      die(EXIT_FAILURE, "fork failed: %s", strerror(errno));
    if (!kid) {
      dup2(pfd[1], STDIN_FILENO);
      dup2(pfd[1], STDOUT_FILENO);
      close(pfd[1]);
      close(pfd[0]);
      if (logfp)
	fclose(logfp);
      closelog();
      if (f & f_daemon)
	u_detach();
      execvp(DA(&spawnopts)[0], DA(&spawnopts));
      die(127, "couldn't exec `%s': %s", spawnpath, strerror(errno));
    }
    sigprocmask(SIG_SETMASK, &oldmask, 0);
    fd = pfd[0];
    close(pfd[1]);
  } else {
    struct sockaddr_un sun;
    size_t sz = strlen(sock) + 1;
    if (sz > sizeof(sun.sun_path))
      die(EXIT_FAILURE, "socket name `%s' too long", sock);
    memset(&sun, 0, sizeof(sun));
    sun.sun_family = AF_UNIX;
    memcpy(sun.sun_path, sock, sz);
    sz = sz + offsetof(struct sockaddr_un, sun_path);
    if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0)
      die(EXIT_FAILURE, "error making socket: %s", strerror(errno));
    if (connect(fd, (struct sockaddr *)&sun, sz)) {
      die(EXIT_FAILURE, "error connecting to `%s': %s",
	  sun.sun_path, strerror(errno));
    }
  }

  if (f & f_daemon) {
    if (u_daemon())
      die(EXIT_FAILURE, "error becoming daemon: %s", strerror(errno));
  }
  if (pidfp) {
    fprintf(pidfp, "%li\n", (long)getpid());
    fclose(pidfp);
  }

  /* --- If we're meant to be interactive, do that --- */

  if (!(f & f_noinput) && optind == argc) {
    sel_state sel;
    selbuf bu, bs;

    sel_init(&sel);
    selbuf_init(&bu, &sel, STDIN_FILENO, uline, &bu);
    selbuf_init(&bs, &sel, fd, sline, &bs);
    for (;;) {
      if (sel_select(&sel) && errno != EINTR && errno != EAGAIN)
	die(EXIT_FAILURE, "select failed: %s", strerror(errno));
    }
  }

  /* --- If there's a command, submit it --- */

  if (optind < argc) {
    dstr d = DSTR_INIT;
    dstr_puts(&d, argv[optind++]);
    while (optind < argc) {
      dstr_putc(&d, ' ');
      dstr_puts(&d, argv[optind++]);
    }
    dstr_putc(&d, '\n');
    write(fd, d.buf, d.len);
    shutdown(fd, 1);
    dstr_destroy(&d);
    f |= f_command;
  }

  /* --- Pull everything else out of the box --- */

  {
    sel_state sel;
    selbuf b;
    sig hup;

    sel_init(&sel);
    selbuf_init(&b, &sel, fd, cline, 0);

    if (f & f_syslog)
      openlog(QUIS, 0, LOG_DAEMON);
    if (logfp) {
      sig_init(&sel);
      sig_add(&hup, SIGHUP, sighup, 0);
    }
    for (;;) {
      if (sel_select(&sel) && errno != EINTR && errno != EAGAIN)
	die(EXIT_FAILURE, "select failed: %s", strerror(errno));
    }
  }

  return (0);
}

/*----- That's all, folks -------------------------------------------------*/
Commit	Line	Data
410c8acf	1	/* --c--
410c8acf	2	*
a803add7	3	* $Id: client.c,v 1.10 2003/05/17 10:59:19 mdw Exp $
410c8acf	4	*
	5	* Client for TrIPE
	6	*
	7	* (c) 2001 Straylight/Edgeware
	8	*/
	9
	10	/----- Licensing notice --------------------------------------------------
	11	*
	12	* This file is part of Trivial IP Encryption (TrIPE).
	13	*
	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.
	18	*
	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.
	23	*
	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.
	27	*/
	28
	29	/----- Revision history --------------------------------------------------
	30	*
	31	* $Log: client.c,v $
a803add7	32	* Revision 1.10 2003/05/17 10:59:19 mdw
	33	* Put a newline in the pidfile.
	34	*
6be88c14	35	* Revision 1.9 2002/01/13 14:57:18 mdw
	36	* Track @lbuf@ changes in mLib.
	37	*
d071d798	38	* Revision 1.8 2001/06/19 22:09:37 mdw
	39	* Move the program name to the right place when constructing the arguments
	40	* to pass to a new server.
	41	*
06b2a088	42	* Revision 1.7 2001/02/22 09:07:54 mdw
	43	* Write a pidfile on request, and delete it when finished.
	44	*
fa4bef80	45	* Revision 1.6 2001/02/22 09:06:08 mdw
	46	* Fix logfile rotation to avoid program collapse.
	47	*
5f5150b1	48	* Revision 1.5 2001/02/16 21:23:39 mdw
	49	* Use reliable signal handling for reopening logs.
	50	*
7fadfa0d	51	* Revision 1.4 2001/02/06 09:34:53 mdw
	52	* Change ERR response to FAIL for consistency with other programs.
	53	*
9dd01bc6	54	* Revision 1.3 2001/02/04 17:10:15 mdw
	55	* Reopen logfiles on receipt of @SIGHUP@ (not done very well). Don't
	56	* change directory -- just mangle pathnames instead.
	57	*
73189848	58	* Revision 1.2 2001/02/04 01:17:54 mdw
	59	* Create a configuration header file to tidy up command lines.
	60	*
410c8acf	61	* Revision 1.1 2001/02/03 20:26:37 mdw
	62	* Initial checkin.
	63	*
	64	*/
	65
	66	/----- Header files ------------------------------------------------------/
	67
73189848	68	#include "config.h"
73189848	69
410c8acf	70	#include <ctype.h>
	71	#include <errno.h>
	72	#include <signal.h>
	73	#include <stdio.h>
	74	#include <stdlib.h>
	75	#include <string.h>
	76	#include <time.h>
	77
	78	#include <sys/types.h>
	79	#include <sys/time.h>
	80	#include <unistd.h>
	81	#include <fcntl.h>
	82	#include <sys/wait.h>
	83	#include <syslog.h>
	84
	85	#include <sys/socket.h>
	86	#include <sys/un.h>
	87	#include <arpa/inet.h>
	88	#include <netdb.h>
	89
	90	#include <mLib/alloc.h>
	91	#include <mLib/darray.h>
	92	#include <mLib/dstr.h>
410c8acf	93	#include <mLib/mdwopt.h>
	94	#include <mLib/quis.h>
	95	#include <mLib/report.h>
	96	#include <mLib/sel.h>
	97	#include <mLib/selbuf.h>
5f5150b1	98	#include <mLib/sig.h>
410c8acf	99	#include <mLib/str.h>
	100
	101	#include "util.h"
	102
	103	#undef sun
	104
	105	/----- Data structures ---------------------------------------------------/
	106
	107	#ifndef STRING_V
	108	# define STRING_V
	109	DA_DECL(string_v, char *);
	110	#endif
	111
	112	/----- Static variables --------------------------------------------------/
	113
06b2a088	114	static const char *pidfile = 0;
06b2a088	115	static const char *logname = 0;
410c8acf	116	static FILE *logfp = 0;
	117	static unsigned f = 0;
	118	static int fd;
	119
	120	#define f_bogus 1u
	121	#define f_spawn 2u
	122	#define f_daemon 4u
	123	#define f_spawnopts 8u
	124	#define f_syslog 16u
	125	#define f_command 32u
	126	#define f_noinput 64u
	127	#define f_warn 128u
	128	#define f_uclose 256u
	129
	130	/----- Main code ---------------------------------------------------------/
	131
	132	static void reap(int sig)
	133	{
410c8acf	134	int e = errno;
06b2a088	135	while (waitpid(-1, 0, WNOHANG) > 0)
410c8acf	136	;
	137	errno = e;
	138	}
	139
	140	static void writelog(const char cat, const char msg)
	141	{
	142	char buf[256];
	143	time_t t = time(0);
	144	struct tm *tm = localtime(&t);
	145	strftime(buf, sizeof(buf), "%Y-%m-%d %H:%M:%S", tm);
	146	fprintf(logfp, "%s %s: %s\n", buf, cat, msg);
	147	}
	148
6be88c14	149	static void cline(char p, size_t len, void b)
410c8acf	150	{
	151	char *q;
	152	if (!p) {
	153	if (f & f_command)
	154	die(EXIT_FAILURE, "server dropped the connection");
	155	exit(0);
	156	}
	157	q = str_getword(&p);
	158	if (!q)
	159	return;
	160	if (strcmp(q, "WARN") == 0) {
	161	if (f & f_syslog)
	162	syslog(LOG_WARNING, "%s", p);
	163	if (logfp)
	164	writelog("warning", p);
	165	if (f & f_warn)
	166	fprintf(stderr, "Warning: %s\n", p);
	167	} else if (strcmp(q, "TRACE") == 0) {
	168	if (f & f_syslog)
	169	syslog(LOG_DEBUG, "%s", p);
	170	if (logfp)
	171	writelog("debug", p);
	172	} else if (!(f & f_command)) {
	173	if (f & f_syslog)
	174	syslog(LOG_ERR, "unexpected output `%s %s'", q, p);
	175	if (logfp) {
	176	dstr d = DSTR_INIT;
	177	dstr_putf(&d, "unexpected output `%s %s'", q, p);
	178	writelog("error", d.buf);
	179	dstr_destroy(&d);
	180	}
7fadfa0d	181	} else if (strcmp(q, "FAIL") == 0)
410c8acf	182	die(EXIT_FAILURE, "%s", p);
	183	else if (strcmp(q, "INFO") == 0)
	184	puts(p);
	185	else if (strcmp(q, "OK") == 0)
	186	exit(0);
	187	else
	188	die(EXIT_FAILURE, "unexpected output `%s %s'", q, p);
	189	}
	190
6be88c14	191	static void sline(char p, size_t len, void b)
410c8acf	192	{
	193	if (!p) {
	194	if (!(f & f_uclose))
	195	moan("server closed the connection");
	196	exit(0);
	197	}
	198	puts(p);
	199	}
	200
6be88c14	201	static void uline(char p, size_t len, void b)
410c8acf	202	{
410c8acf	203	if (!p) {
	204	selbuf_destroy(b);
	205	shutdown(fd, 1);
	206	f \|= f_uclose;
	207	} else {
6be88c14	208	p[len] = '\n';
6be88c14	209	write(fd, p, len + 1);
410c8acf	210	}
	211	}
	212
9dd01bc6	213	static void logfile(const char *name)
9dd01bc6	214	{
fa4bef80	215	FILE *fp;
	216
	217	if ((fp = fopen(name, "a")) != 0) {
	218	if (logfp)
	219	fclose(logfp);
	220	logfp = fp;
	221	setvbuf(logfp, 0, _IOLBF, BUFSIZ);
	222	} else {
	223	dstr d = DSTR_INIT;
	224	dstr_putf(&d, "error opening logfile `%s': %s", name, strerror(errno));
	225	if (logfp)
	226	writelog("error", d.buf);
	227	else if (logname)
	228	die(EXIT_FAILURE, d.buf);
	229	if (f & f_syslog)
	230	syslog(LOG_ERR, d.buf);
	231	dstr_destroy(&d);
9dd01bc6	232	}
9dd01bc6	233	}
9dd01bc6	234
5f5150b1	235	static void sighup(int sig, void *v)
	236	{
	237	logfile(logname);
	238	}
	239
06b2a088	240	static void cleanup(void)
	241	{
	242	if (pidfile)
	243	unlink(pidfile);
	244	}
	245
	246	static void sigdie(int sig)
	247	{
	248	cleanup();
	249	signal(sig, SIG_DFL);
	250	raise(sig);
	251	}
	252
410c8acf	253	static void version(FILE *fp)
	254	{
	255	pquis(fp, "$, TrIPE version " VERSION "\n");
	256	}
	257
	258	static void usage(FILE *fp)
	259	{
	260	pquis(fp, "\
	261	Usage:\n\
	262	$ [-w] [-options] [command [args]...]\n\
	263	$ [-Dl] [-f file] [-options]\n\
	264	Options:\n\
06b2a088	265	[-s] [-d directory] [-a socket] [-P pidfile]\n\
06b2a088	266	[-p program] [-S arg,arg,...]\n\
410c8acf	267	");
	268	}
	269
	270	static void help(FILE *fp)
	271	{
	272	version(fp);
	273	fputc('\n', fp);
	274	usage(fp);
	275	fputs("\
	276	\n\
	277	Options in full:\n\
	278	\n\
	279	-h, --help Show this help text.\n\
	280	-v, --version Show version number.\n\
	281	-u, --usage Show brief usage message.\n\
	282	\n\
	283	-D, --daemon Become a background task after connecting.\n\
	284	-d, --directory=DIR Select current directory [default /var/lib/tripe]\n\
	285	-a, --admin-socket=FILE Select socket to connect to.\n\
06b2a088	286	-P, --pidfile=FILE Write process-id to FILE.\n\
410c8acf	287	\n\
	288	-s, --spawn Start server rather than connecting.\n\
	289	-p, --spawn-path=PATH Specify path to executable.\n\
	290	-S, --spawn-args=ARGS Specify comma-separated arguments.\n\
	291	\n\
	292	-l, --syslog Log messages to system log.\n\
	293	-f, --logfile=FILE Log messages to FILE.\n\
	294	-w, --warnings Show warnings when running commands.\n\
	295	", fp);
	296	}
	297
	298	int main(int argc, char *argv[])
	299	{
	300	const char *dir = "/var/lib/tripe";
	301	const char *sock = "tripesock";
	302	const char *spawnpath = "tripe";
	303	string_v spawnopts = DA_INIT;
	304	char *p;
06b2a088	305	FILE *pidfp = 0;
410c8acf	306
	307	ego(argv[0]);
	308
	309	if ((p = getenv("TRIPEDIR")) != 0)
	310	dir = p;
	311
	312	/* --- Parse the arguments --- */
	313
	314	for (;;) {
	315	static const struct option opts[] = {
	316	{ "help", 0, 0, 'h' },
	317	{ "version", 0, 0, 'v' },
	318	{ "usage", 0, 0, 'u' },
	319	{ "daemon", 0, 0, 'D' },
	320	{ "directory", OPTF_ARGREQ, 0, 'd' },
	321	{ "admin-socket", OPTF_ARGREQ, 0, 'a' },
	322	{ "spawn", 0, 0, 's' },
	323	{ "spawn-path", OPTF_ARGREQ, 0, 'p' },
	324	{ "spawn-args", OPTF_ARGREQ, 0, 'S' },
	325	{ "syslog", 0, 0, 'l' },
	326	{ "logfile", OPTF_ARGREQ, 0, 'f' },
	327	{ "warnings", 0, 0, 'w' },
06b2a088	328	{ "pidfile", OPTF_ARGREQ, 0, 'P' },
410c8acf	329	{ 0, 0, 0, 0 }
	330	};
	331
06b2a088	332	int i = mdwopt(argc, argv, "+hvuDd:a:sp:S:lwf:nP:", opts, 0, 0, 0);
410c8acf	333	if (i < 0)
	334	break;
	335	switch (i) {
	336	case 'h':
	337	help(stdout);
	338	exit(0);
	339	case 'v':
	340	version(stdout);
	341	exit(0);
	342	case 'u':
	343	usage(stdout);
	344	exit(0);
	345	case 'D':
	346	f \|= f_daemon \| f_noinput;
	347	break;
	348	case 'd':
	349	dir = optarg;
	350	break;
	351	case 'a':
	352	sock = optarg;
	353	break;
	354	case 's':
	355	f \|= f_spawn;
	356	break;
	357	case 'p':
	358	f \|= f_spawn;
	359	spawnpath = optarg;
	360	break;
	361	case 'S':
	362	f \|= f_spawn \| f_spawnopts;
	363	for (p = strtok(optarg, ","); p; p = strtok(0, ","))
	364	DA_PUSH(&spawnopts, p);
	365	break;
	366	case 'l':
	367	f \|= f_syslog \| f_noinput;
	368	break;
	369	case 'w':
	370	f \|= f_warn;
	371	break;
	372	case 'f':
9dd01bc6	373	logname = optarg;
410c8acf	374	f \|= f_noinput;
410c8acf	375	break;
06b2a088	376	case 'P':
	377	pidfile = optarg;
	378	break;
410c8acf	379	default:
	380	f \|= f_bogus;
	381	break;
	382	}
	383	}
	384	if ((f & f_bogus) \|\| ((f & f_noinput) && optind < argc)) {
	385	usage(stderr);
	386	exit(EXIT_FAILURE);
	387	}
	388
06b2a088	389	/* --- Set various things up --- */
	390
	391	if (chdir(dir)) {
	392	die(EXIT_FAILURE, "couldn't set `%s' as current directory: %s",
	393	dir, strerror(errno));
	394	}
	395	if (logname)
	396	logfile(logname);
	397	if (!pidfile && (f & f_daemon) && ((f & f_syslog) \|\| logname))
	398	pidfile = "tripectl.pid";
	399	if (pidfile && (pidfp = fopen(pidfile, "w")) == 0) {
	400	die(EXIT_FAILURE, "couldn't open `%s' for writing: %s",
	401	pidfile, strerror(errno));
	402	}
	403	signal(SIGINT, sigdie);
	404	signal(SIGQUIT, sigdie);
	405	signal(SIGTERM, sigdie);
	406	atexit(cleanup);
	407
410c8acf	408	/* --- Connect to the server --- */
	409
	410	if (f & f_spawn) {
	411	int pfd[2];
	412	pid_t kid;
	413	struct sigaction sa;
	414	sigset_t newmask, oldmask;
	415
	416	sa.sa_handler = reap;
	417	sigemptyset(&sa.sa_mask);
	418	sa.sa_flags = SA_NOCLDSTOP;
	419	#ifdef SA_RESTART
	420	sa.sa_flags \|= SA_RESTART;
	421	#endif
	422	sigaction(SIGCHLD, &sa, 0);
	423
06b2a088	424	DA_UNSHIFT(&spawnopts, (char *)sock);
	425	DA_UNSHIFT(&spawnopts, "-a");
	426	DA_UNSHIFT(&spawnopts, "-d.");
d071d798	427	DA_UNSHIFT(&spawnopts, (char *)spawnpath);
410c8acf	428	DA_PUSH(&spawnopts, 0);
	429	if (socketpair(PF_UNIX, SOCK_STREAM, 0, pfd))
	430	die(EXIT_FAILURE, "error from socketpair: %s", strerror(errno));
	431	sigemptyset(&newmask);
	432	sigaddset(&newmask, SIGCHLD);
	433	sigprocmask(SIG_BLOCK, &newmask, &oldmask);
	434	if ((kid = fork()) < 0)
	435	die(EXIT_FAILURE, "fork failed: %s", strerror(errno));
	436	if (!kid) {
	437	dup2(pfd[1], STDIN_FILENO);
	438	dup2(pfd[1], STDOUT_FILENO);
	439	close(pfd[1]);
	440	close(pfd[0]);
9dd01bc6	441	if (logfp)
	442	fclose(logfp);
	443	closelog();
06b2a088	444	if (f & f_daemon)
06b2a088	445	u_detach();
410c8acf	446	execvp(DA(&spawnopts)[0], DA(&spawnopts));
	447	die(127, "couldn't exec `%s': %s", spawnpath, strerror(errno));
	448	}
	449	sigprocmask(SIG_SETMASK, &oldmask, 0);
	450	fd = pfd[0];
	451	close(pfd[1]);
	452	} else {
	453	struct sockaddr_un sun;
	454	size_t sz = strlen(sock) + 1;
06b2a088	455	if (sz > sizeof(sun.sun_path))
410c8acf	456	die(EXIT_FAILURE, "socket name `%s' too long", sock);
	457	memset(&sun, 0, sizeof(sun));
	458	sun.sun_family = AF_UNIX;
06b2a088	459	memcpy(sun.sun_path, sock, sz);
06b2a088	460	sz = sz + offsetof(struct sockaddr_un, sun_path);
410c8acf	461	if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0)
	462	die(EXIT_FAILURE, "error making socket: %s", strerror(errno));
	463	if (connect(fd, (struct sockaddr *)&sun, sz)) {
	464	die(EXIT_FAILURE, "error connecting to `%s': %s",
9dd01bc6	465	sun.sun_path, strerror(errno));
410c8acf	466	}
	467	}
	468
	469	if (f & f_daemon) {
	470	if (u_daemon())
	471	die(EXIT_FAILURE, "error becoming daemon: %s", strerror(errno));
	472	}
06b2a088	473	if (pidfp) {
a803add7	474	fprintf(pidfp, "%li\n", (long)getpid());
06b2a088	475	fclose(pidfp);
06b2a088	476	}
410c8acf	477
	478	/* --- If we're meant to be interactive, do that --- */
	479
	480	if (!(f & f_noinput) && optind == argc) {
	481	sel_state sel;
	482	selbuf bu, bs;
	483
	484	sel_init(&sel);
	485	selbuf_init(&bu, &sel, STDIN_FILENO, uline, &bu);
	486	selbuf_init(&bs, &sel, fd, sline, &bs);
	487	for (;;) {
5f5150b1	488	if (sel_select(&sel) && errno != EINTR && errno != EAGAIN)
410c8acf	489	die(EXIT_FAILURE, "select failed: %s", strerror(errno));
	490	}
	491	}
	492
	493	/* --- If there's a command, submit it --- */
	494
	495	if (optind < argc) {
	496	dstr d = DSTR_INIT;
	497	dstr_puts(&d, argv[optind++]);
	498	while (optind < argc) {
	499	dstr_putc(&d, ' ');
	500	dstr_puts(&d, argv[optind++]);
	501	}
	502	dstr_putc(&d, '\n');
	503	write(fd, d.buf, d.len);
	504	shutdown(fd, 1);
	505	dstr_destroy(&d);
	506	f \|= f_command;
	507	}
	508
	509	/* --- Pull everything else out of the box --- */
	510
	511	{
5f5150b1	512	sel_state sel;
	513	selbuf b;
	514	sig hup;
	515
	516	sel_init(&sel);
	517	selbuf_init(&b, &sel, fd, cline, 0);
	518
410c8acf	519	if (f & f_syslog)
410c8acf	520	openlog(QUIS, 0, LOG_DAEMON);
9dd01bc6	521	if (logfp) {
5f5150b1	522	sig_init(&sel);
5f5150b1	523	sig_add(&hup, SIGHUP, sighup, 0);
9dd01bc6	524	}
410c8acf	525	for (;;) {
5f5150b1	526	if (sel_select(&sel) && errno != EINTR && errno != EAGAIN)
5f5150b1	527	die(EXIT_FAILURE, "select failed: %s", strerror(errno));
410c8acf	528	}
410c8acf	529	}
	530
	531	return (0);
	532	}
	533
	534	/----- That's all, folks -------------------------------------------------/