+++ /dev/null
-/* -*-c-*-
- *
- * $Id$
- *
- * 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.
- */
-
-/*----- 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;
-static const char *bgtag = 0;
-
-#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 checkbg(char **p)
-{
- char *q = str_getword(p);
- if (!q)
- die(EXIT_FAILURE, "missing background tag");
- if (!bgtag || strcmp(bgtag, q) != 0)
- die(EXIT_FAILURE, "unexpected background tag `%s'", q);
-}
-
-static void checkfg(void)
-{
- if (bgtag)
- die(EXIT_FAILURE, "unexpected foreground response");
-}
-
-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) {
- checkfg();
- die(EXIT_FAILURE, "%s", p);
- } else if (strcmp(q, "INFO") == 0) {
- checkfg();
- puts(p);
- } else if (strcmp(q, "OK") == 0) {
- checkfg();
- exit(0);
- } else if (strcmp(q, "BGDETACH") == 0) {
- if (bgtag)
- die(EXIT_FAILURE, "repeat detach");
- bgtag = xstrdup(p);
- } else if (strcmp(q, "BGOK") == 0) {
- checkbg(&p);
- exit(0);
- } else if (strcmp(q, "BGINFO") == 0) {
- checkbg(&p);
- puts(p);
- } else if (strcmp(q, "BGFAIL") == 0) {
- checkbg(&p);
- die(EXIT_FAILURE, "%s", p);
- } 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';
- errno = EIO;
- if (write(fd, p, len + 1) != len + 1)
- moan("write failed: %s", strerror(errno));
- }
-}
-
-static void setup(const char *cmd)
-{
- dstr d = DSTR_INIT;
- char ch;
- char *p, *q;
- int n;
-
- dstr_puts(&d, cmd);
- dstr_putc(&d, '\n');
- errno = EIO; /* Relax: be vague */
- if (write(fd, d.buf, d.len) != d.len) {
- die(EXIT_FAILURE, "error sending setup command `%s': %s",
- cmd, strerror(errno));
- }
- dstr_reset(&d);
- for (;;) {
- n = read(fd, &ch, 1);
- if (!n)
- die(EXIT_FAILURE, "unexpected EOF during setup");
- if (n < 0) {
- die(EXIT_FAILURE, "error receiving reply to `%s': %s",
- cmd, strerror(errno));
- }
- if (d.len < 256)
- dstr_putc(&d, ch);
- if (ch == '\n') {
- p = d.buf;
- q = str_getword(&p);
- if (!q)
- ;
- else if (strcmp(q, "OK") == 0)
- return;
- else if (strcmp(q, "FAIL") == 0)
- die(EXIT_FAILURE, "setup command `%s' failed: %s", cmd, p);
- dstr_reset(&d);
- }
- }
-}
-
-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 " CONFIGDIR "].\n\
--a, --admin-socket=FILE Select socket to connect to\n\
- [default " SOCKETDIR "/tripesock].\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 = CONFIGDIR;
- const char *sock = SOCKETDIR "/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);
- if (pidfp)
- fclose(pidfp);
- 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);
- }
- signal(SIGPIPE, SIG_IGN);
-
- /* --- If we're meant to be interactive, do that --- */
-
- if (optind == argc)
- setup("WATCH -A+tw");
- 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;
- setup((f & f_warn) ? "WATCH -A+w" : "WATCH -A");
- dstr_puts(&d, argv[optind++]);
- while (optind < argc) {
- dstr_putc(&d, ' ');
- dstr_puts(&d, argv[optind++]);
- }
- dstr_putc(&d, '\n');
- errno = EIO;
- if (write(fd, d.buf, d.len) != d.len || shutdown(fd, 1))
- die(EXIT_FAILURE, "write failed: %s", strerror(errno));
- 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 -------------------------------------------------*/
~mdw / tripe / blobdiff