citadel/utils/sendcommand.c

   1 /*
   2  * Command-line utility to transmit a server command.
   3  *
   4  * Copyright (c) 1987-2010 by the citadel.org team
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 3 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include "ctdl_module.h"
  22
  23 #include <stdlib.h>
  24 #include <unistd.h>
  25 #include <sys/types.h>
  26 #include <sys/wait.h>
  27 #include <string.h>
  28 #include <fcntl.h>
  29 #include <stdio.h>
  30 #include <ctype.h>
  31
  32 #if TIME_WITH_SYS_TIME
  33 # include <sys/time.h>
  34 # include <time.h>
  35 #else
  36 # if HAVE_SYS_TIME_H
  37 #  include <sys/time.h>
  38 # else
  39 #  include <time.h>
  40 # endif
  41 #endif
  42
  43 #include <signal.h>
  44 #include <errno.h>
  45 #include <limits.h>
  46 #include <libcitadel.h>
  47 #include "citadel.h"
  48 #include "citadel_ipc.h"
  49 #include "server.h"
  50 #include "config.h"
  51
  52 static CtdlIPC *ipc = NULL;
  53
  54 /*
  55  * Why both cleanup() and nq_cleanup() ?  Notice the alarm() call in
  56  * cleanup() .  If for some reason sendcommand hangs waiting for the server
  57  * to clean up, the alarm clock goes off and the program exits anyway.
  58  * The cleanup() routine makes a check to ensure it's not reentering, in
  59  * case the ipc module looped it somehow.
  60  */
  61 void nq_cleanup(int e)
  62 {
  63         if (e == SIGALRM)
  64                 fprintf(stderr, "\nWatch dog time out.\n");
  65         exit(e);
  66 }
  67
  68 /*
  69  * send binary to server
  70  */
  71 void serv_write(CtdlIPC *ipc, const char *buf, unsigned int nbytes)
  72 {
  73         unsigned int bytes_written = 0;
  74         int retval;
  75 /*
  76 #if defined(HAVE_OPENSSL)
  77         if (ipc->ssl) {
  78                 serv_write_ssl(ipc, buf, nbytes);
  79                 return;
  80         }
  81 #endif
  82 */
  83         while (bytes_written < nbytes) {
  84                 retval = write(ipc->sock, &buf[bytes_written],
  85                                nbytes - bytes_written);
  86                 if (retval < 1) {
  87                         connection_died(ipc, 0);
  88                         return;
  89                 }
  90                 bytes_written += retval;
  91         }
  92 }
  93
  94
  95 void cleanup(int e)
  96 {
  97         static int nested = 0;
  98
  99         alarm(30);
 100         signal(SIGALRM, nq_cleanup);
 101         if ((ipc != NULL) &&
 102             (ipc->sock > 0))
 103                 serv_write(ipc, "\n", 1);
 104         if ((nested++ < 1) &&
 105             (ipc != NULL) &&
 106             (ipc->sock > 0))
 107                 CtdlIPCQuit(ipc);
 108         nq_cleanup(e);
 109 }
 110
 111 /*
 112  * This is implemented as a function rather than as a macro because the
 113  * client-side IPC modules expect logoff() to be defined.  They call logoff()
 114  * when a problem connecting or staying connected to the server occurs.
 115  */
 116 void logoff(int e)
 117 {
 118         cleanup(e);
 119 }
 120
 121 /*
 122  * Connect sendcommand to the Citadel server running on this computer.
 123  */
 124 void np_attach_to_server(char *host, char *port)
 125 {
 126         char buf[SIZ];
 127         char hostbuf[256], portbuf[256];
 128         char *args[] =
 129         {"sendcommand", NULL};
 130         int r;
 131
 132         fprintf(stderr, "Attaching to server...\n");
 133         strcpy(hostbuf, host);
 134         strcpy(portbuf, port);
 135         ipc = CtdlIPC_new(1, args, hostbuf, portbuf);
 136         if (!ipc) {
 137                 fprintf(stderr, "Can't connect: %s\n", strerror(errno));
 138                 exit(3);
 139         }
 140         CtdlIPC_chat_recv(ipc, buf);
 141         fprintf(stderr, "%s\n", &buf[4]);
 142         snprintf(buf, sizeof buf, "IPGM %d", config.c_ipgm_secret);
 143         r = CtdlIPCInternalProgram(ipc, config.c_ipgm_secret, buf);
 144         fprintf(stderr, "%s\n", buf);
 145         if (r / 100 != 2) {
 146                 cleanup(2);
 147         }
 148 }
 149
 150
 151 void sendcommand_die(void) {
 152         exit(0);
 153 }
 154
 155
 156
 157 int main(int argc, char **argv)
 158 {
 159         int a;
 160         char cmd[SIZ];
 161         char buf[SIZ];
 162         int watchdog = 60;
 163
 164         int relh=0;
 165         int home=0;
 166         char relhome[PATH_MAX]="";
 167         char ctdldir[PATH_MAX]=CTDLDIR;
 168         fd_set read_fd;
 169         struct timeval tv;
 170         int ret;
 171         int server_shutting_down = 0;
 172
 173         strcpy(ctdl_home_directory, DEFAULT_PORT);
 174
 175         strcpy(cmd, "");
 176         /*
 177          * Change directories if specified
 178          */
 179         for (a = 1; a < argc; ++a) {
 180                 if (!strncmp(argv[a], "-h", 2)) {
 181                         relh=argv[a][2]!='/';
 182                         if (!relh) safestrncpy(ctdl_home_directory, &argv[a][2],
 183                                                                    sizeof ctdl_home_directory);
 184                         else
 185                                 safestrncpy(relhome, &argv[a][2],
 186                                                         sizeof relhome);
 187                         home=1;
 188                 } else if (!strncmp(argv[a], "-w", 2)) {
 189                         watchdog = atoi(&argv[a][2]);
 190                         if (watchdog<1)
 191                                 watchdog=1;
 192                 } else {
 193                         if (!IsEmptyStr(cmd))
 194                                 strcat(cmd, " ");
 195                         strcat(cmd, argv[a]);
 196                 }
 197         }
 198
 199         calc_dirs_n_files(relh, home, relhome, ctdldir, 0);
 200         get_config();
 201
 202         signal(SIGINT, cleanup);
 203         signal(SIGQUIT, cleanup);
 204         signal(SIGHUP, cleanup);
 205         signal(SIGTERM, cleanup);
 206
 207         fprintf(stderr, "sendcommand: started (pid=%d) "
 208                         "running in %s\n",
 209                         (int) getpid(),
 210                         ctdl_home_directory);
 211         fflush(stderr);
 212
 213         alarm(watchdog);
 214         signal(SIGALRM, nq_cleanup); /* Set up a watchdog type timer in case we hang */
 215
 216         np_attach_to_server(UDS, ctdl_home_directory);
 217         fflush(stderr);
 218         setIPCDeathHook(sendcommand_die);
 219
 220         fprintf(stderr, "%s\n", cmd);
 221         CtdlIPC_chat_send(ipc, cmd);
 222         CtdlIPC_chat_recv(ipc, buf);
 223         fprintf(stderr, "%s\n", buf);
 224
 225         tv.tv_sec = 0;
 226         tv.tv_usec = 1000;
 227
 228         if (!strncasecmp(&buf[1], "31", 2)) {
 229                 server_shutting_down = 1;
 230         }
 231
 232         if (buf[0] == '1') {
 233                 while (CtdlIPC_chat_recv(ipc, buf), strcmp(buf, "000")) {
 234                         printf("%s\n", buf);
 235                         alarm(watchdog); /* Kick the watchdog timer */
 236                 }
 237         } else if (buf[0] == '4') {
 238                 do {
 239                         if (fgets(buf, sizeof buf, stdin) == NULL)
 240                                 strcpy(buf, "000");
 241                         if (!IsEmptyStr(buf))
 242                                 if (buf[strlen(buf) - 1] == '\n')
 243                                         buf[strlen(buf) - 1] = 0;
 244                         if (!IsEmptyStr(buf))
 245                                 if (buf[strlen(buf) - 1] == '\r')
 246                                         buf[strlen(buf) - 1] = 0;
 247                         if (strcmp(buf, "000"))
 248                                 CtdlIPC_chat_send(ipc, buf);
 249
 250                         FD_ZERO(&read_fd);
 251                         FD_SET(ipc->sock, &read_fd);
 252                         ret = select(ipc->sock+1, &read_fd, NULL, NULL,  &tv);
 253                         if (ret == -1) {
 254                                 if (!(errno == EINTR || errno == EAGAIN))
 255                                         fprintf(stderr, "select() failed: %s", strerror(errno));
 256                                 return(1);
 257                         }
 258
 259                         if (ret != 0) {
 260                                 size_t n;
 261                                 char rbuf[SIZ];
 262
 263                                 rbuf[0] = '\0';
 264                                 n = read(ipc->sock, rbuf, SIZ);
 265                                 if (n>0) {
 266                                         rbuf[n]='\0';
 267                                         fprintf(stderr, "%s", rbuf);
 268                                         fflush (stdout);
 269                                 }
 270                         }
 271                         alarm(watchdog); /* Kick the watchdog timer */
 272                 } while (strcmp(buf, "000"));
 273                 CtdlIPC_chat_send(ipc, "\n");
 274                 CtdlIPC_chat_send(ipc, "000");
 275         }
 276         alarm(0);       /* Shutdown the watchdog timer */
 277         fprintf(stderr, "sendcommand: processing ended.\n");
 278
 279         /* Clean up and log off ... unless the server indicated that the command
 280          * we sent is shutting it down, in which case we want to just cut the
 281          * connection and exit.
 282          */
 283         if (server_shutting_down) {
 284                 nq_cleanup(0);
 285         }
 286         else {
 287                 cleanup(0);
 288         }
 289         return 0;
 290 }
 291
 292 /*
 293  * Stub function
 294  */
 295 void stty_ctdl(int cmd) {
 296 }
 297
 298