citadel/getmail.c

   1 /*
   2  * $Id: sendcommand.c 5736 2007-11-10 23:12:19Z dothebart $
   3  *
   4  * Command-line utility to transmit a server command.
   5  *
   6  */
   7
   8
   9 #include <stdlib.h>
  10 #include <unistd.h>
  11 #include <sys/types.h>
  12 #include <sys/wait.h>
  13 #include <string.h>
  14 #include <fcntl.h>
  15 #include <stdio.h>
  16 #include <ctype.h>
  17
  18 #if TIME_WITH_SYS_TIME
  19 # include <sys/time.h>
  20 # include <time.h>
  21 #else
  22 # if HAVE_SYS_TIME_H
  23 #  include <sys/time.h>
  24 # else
  25 #  include <time.h>
  26 # endif
  27 #endif
  28
  29 #include <signal.h>
  30 #include <errno.h>
  31 #include <limits.h>
  32 #include <libcitadel.h>
  33 #include "citadel.h"
  34 #include "citadel_ipc.h"
  35 #include "server.h"
  36 #include "config.h"
  37
  38 #define LOCKFILE "/tmp/LCK.sendcommand"
  39
  40 static CtdlIPC *ipc = NULL;
  41
  42 /*
  43  * make sure only one copy of sendcommand runs at a time, using lock files
  44  */
  45 int set_lockfile(void)
  46 {
  47         FILE *lfp;
  48         int onppid;
  49
  50         if ((lfp = fopen(LOCKFILE, "r")) != NULL) {
  51                 fscanf(lfp, "%d", &onppid);
  52                 fclose(lfp);
  53                 if (!kill(onppid, 0) || errno == EPERM)
  54                         return 1;
  55         }
  56         lfp = fopen(LOCKFILE, "w");
  57         fprintf(lfp, "%ld\n", (long) getpid());
  58         fclose(lfp);
  59         return (0);
  60 }
  61
  62 void remove_lockfile(void)
  63 {
  64         unlink(LOCKFILE);
  65 }
  66
  67 /*
  68  * Why both cleanup() and nq_cleanup() ?  Notice the alarm() call in
  69  * cleanup() .  If for some reason sendcommand hangs waiting for the server
  70  * to clean up, the alarm clock goes off and the program exits anyway.
  71  * The cleanup() routine makes a check to ensure it's not reentering, in
  72  * case the ipc module looped it somehow.
  73  */
  74 void nq_cleanup(int e)
  75 {
  76         remove_lockfile();
  77         exit(e);
  78 }
  79
  80 /*
  81  * send binary to server
  82  */
  83 void serv_write(CtdlIPC *ipc, const char *buf, unsigned int nbytes)
  84 {
  85         unsigned int bytes_written = 0;
  86         int retval;
  87 /*
  88 #if defined(HAVE_OPENSSL)
  89         if (ipc->ssl) {
  90                 serv_write_ssl(ipc, buf, nbytes);
  91                 return;
  92         }
  93 #endif
  94 */
  95         while (bytes_written < nbytes) {
  96                 retval = write(ipc->sock, &buf[bytes_written],
  97                                nbytes - bytes_written);
  98                 if (retval < 1) {
  99                         connection_died(ipc, 0);
 100                         return;
 101                 }
 102                 bytes_written += retval;
 103         }
 104 }
 105
 106
 107 void cleanup(int e)
 108 {
 109         static int nested = 0;
 110
 111         alarm(30);
 112         signal(SIGALRM, nq_cleanup);
 113         serv_write(ipc, "\n", 1);
 114         if (nested++ < 1)
 115                 CtdlIPCQuit(ipc);
 116         nq_cleanup(e);
 117 }
 118
 119 /*
 120  * This is implemented as a function rather than as a macro because the
 121  * client-side IPC modules expect logoff() to be defined.  They call logoff()
 122  * when a problem connecting or staying connected to the server occurs.
 123  */
 124 void logoff(int e)
 125 {
 126         cleanup(e);
 127 }
 128
 129 static char *args[] =
 130 {"getmail", NULL};
 131
 132 /*
 133  * Connect sendcommand to the Citadel server running on this computer.
 134  */
 135 void np_attach_to_server(char *host, char *port)
 136 {
 137         char buf[SIZ];
 138         char hostbuf[256] = "";
 139         char portbuf[256] = "";
 140         int r;
 141
 142         fprintf(stderr, "Attaching to server...\n");
 143         strncpy(hostbuf, host, 256);
 144         strncpy(portbuf, port, 256);
 145         ipc = CtdlIPC_new(1, args, hostbuf, portbuf);
 146         if (!ipc) {
 147                 fprintf(stderr, "Can't connect: %s\n", strerror(errno));
 148                 exit(3);
 149         }
 150         CtdlIPC_chat_recv(ipc, buf);
 151         fprintf(stderr, "%s\n", &buf[4]);
 152         snprintf(buf, sizeof buf, "IPGM %d", config.c_ipgm_secret);
 153         r = CtdlIPCInternalProgram(ipc, config.c_ipgm_secret, buf);
 154         fprintf(stderr, "%s\n", buf);
 155         if (r / 100 != 2) {
 156                 cleanup(2);
 157         }
 158 }
 159
 160
 161 void sendcommand_die(void) {
 162         exit(0);
 163 }
 164
 165
 166 /*
 167  * saves filelen bytes from file at pathname
 168  */
 169 int save_buffer(void *file, size_t filelen, const char *pathname)
 170 {
 171         size_t block = 0;
 172         size_t bytes_written = 0;
 173         FILE *fp;
 174
 175         fp = fopen(pathname, "w");
 176         if (!fp) {
 177                 fprintf(stderr, "Cannot open '%s': %s\n", pathname, strerror(errno));
 178                 return 0;
 179         }
 180         do {
 181                 block = fwrite((char *)file + bytes_written, 1,
 182                                 filelen - bytes_written, fp);
 183                 bytes_written += block;
 184         } while (errno == EINTR && bytes_written < filelen);
 185         fclose(fp);
 186
 187         if (bytes_written < filelen) {
 188                 fprintf(stderr,"Trouble saving '%s': %s\n", pathname,
 189                                 strerror(errno));
 190                 return 0;
 191         }
 192         return 1;
 193 }
 194
 195
 196 /*
 197  * main
 198  */
 199 int main(int argc, char **argv)
 200 {
 201         int a, r, i;
 202         char cmd[5][SIZ];
 203         char buf[SIZ];
 204         int MessageToRetrieve;
 205         int MessageFound = 0;
 206         int relh=0;
 207         int home=0;
 208         int n=0;
 209         char relhome[PATH_MAX]="";
 210         char ctdldir[PATH_MAX]=CTDLDIR;
 211         fd_set read_fd;
 212         struct timeval tv;
 213         int ret, err;
 214         int server_shutting_down = 0;
 215         struct ctdlipcroom *Room;
 216         struct ctdlipcmessage *mret;
 217         char cret[SIZ];
 218         unsigned long *msgarr;
 219         struct parts *att;
 220
 221         strcpy(ctdl_home_directory, DEFAULT_PORT);
 222
 223         /*
 224          * Change directories if specified
 225          */
 226         for (a = 1; a < argc && n < 5; ++a) {
 227                 if (!strncmp(argv[a], "-h", 2)) {
 228                         relh=argv[a][2]!='/';
 229                         if (!relh) safestrncpy(ctdl_home_directory, &argv[a][2],
 230                                                                    sizeof ctdl_home_directory);
 231                         else
 232                                 safestrncpy(relhome, &argv[a][2],
 233                                                         sizeof relhome);
 234                         home=1;
 235                 } else {
 236
 237                         strcpy(cmd[n++], argv[a]);
 238                 }
 239         }
 240
 241         calc_dirs_n_files(relh, home, relhome, ctdldir, 0);
 242         get_config();
 243
 244         signal(SIGINT, cleanup);
 245         signal(SIGQUIT, cleanup);
 246         signal(SIGHUP, cleanup);
 247         signal(SIGTERM, cleanup);
 248
 249         fprintf(stderr, "getmail: started (pid=%d) "
 250                         "running in %s\n",
 251                         (int) getpid(),
 252                         ctdl_home_directory);
 253         fflush(stderr);
 254
 255 //      alarm(5);
 256 //      signal(SIGALRM, nq_cleanup); /* Set up a watchdog type timer in case we hang */
 257
 258         np_attach_to_server(UDS, ctdl_run_dir);
 259         fflush(stderr);
 260         setIPCDeathHook(sendcommand_die);
 261
 262         fprintf(stderr, "GOTO %s\n", cmd[0]);
 263         CtdlIPCGotoRoom(ipc, cmd[0], "", &Room, cret);
 264         fprintf(stderr, "%s\n", cret);
 265
 266         MessageToRetrieve = atol(cmd[1]);
 267
 268         r = CtdlIPCGetMessages(ipc, 0, 0, NULL, &msgarr, buf);
 269         printf("Messages: ");
 270         for (i = 0; msgarr[i] > 0 ; i ++)
 271         {
 272 //              printf(" %ld ", msgarr[i]);
 273                 if (msgarr[i] == MessageToRetrieve)
 274                         MessageFound = 1;
 275         }
 276         if (!MessageFound)
 277                 printf("Message %d not found in the above list.", MessageToRetrieve);
 278         printf("\n");
 279
 280         CtdlIPCGetSingleMessage(ipc,  MessageToRetrieve,0,4, &mret, cret);
 281         fprintf(stderr, "%s\n", cret);
 282         fprintf(stderr, "%s: %s\n", "path", mret->path);
 283         fprintf(stderr, "%s: %s\n", "author", mret->author);
 284         fprintf(stderr, "%s: %s\n", "subject", mret->subject);
 285         fprintf(stderr, "%s: %s\n", "email", mret->email);
 286         fprintf(stderr, "%s: %s\n", "text", mret->text);
 287
 288         att = mret->attachments;
 289
 290         while (att != NULL){
 291                 void *attachment;
 292                 char tmp[PATH_MAX];
 293                 char buf[SIZ];
 294
 295                 fprintf(stderr, "Attachment: [%s] %s\n", att->number, att->filename);
 296                 r = CtdlIPCAttachmentDownload(ipc, MessageToRetrieve, att->number, &attachment, NULL, buf);
 297                 printf("----\%s\n----\n", buf);
 298                 if (r / 100 != 2) {
 299                         printf("%s\n", buf);
 300                 } else {
 301                         size_t len;
 302
 303                         len = (size_t)extract_long(buf, 0);
 304                         CtdlMakeTempFileName(tmp, sizeof tmp);
 305                         strcat(tmp, att->filename);
 306                         printf("Saving Attachment to %s", tmp);
 307                         save_buffer(attachment, len, tmp);
 308                         free(attachment);
 309                 }
 310                 att = att->next;
 311
 312         }
 313
 314         ///if (
 315
 316
 317         CtdlIPCQuit(ipc);
 318         exit (1);
 319
 320
 321
 322
 323
 324
 325         CtdlIPC_chat_send(ipc, cmd[4]);
 326         CtdlIPC_chat_recv(ipc, buf);
 327         fprintf(stderr, "%s\n", buf);
 328
 329         tv.tv_sec = 0;
 330         tv.tv_usec = 1000;
 331
 332         if (!strncasecmp(&buf[1], "31", 2)) {
 333                 server_shutting_down = 1;
 334         }
 335
 336         if (buf[0] == '1') {
 337                 while (CtdlIPC_chat_recv(ipc, buf), strcmp(buf, "000")) {
 338                         printf("%s\n", buf);
 339                         alarm(5); /* Kick the watchdog timer */
 340                 }
 341         } else if (buf[0] == '4') {
 342                 do {
 343                         if (fgets(buf, sizeof buf, stdin) == NULL)
 344                                 strcpy(buf, "000");
 345                         if (!IsEmptyStr(buf))
 346                                 if (buf[strlen(buf) - 1] == '\n')
 347                                         buf[strlen(buf) - 1] = 0;
 348                         if (!IsEmptyStr(buf))
 349                                 if (buf[strlen(buf) - 1] == '\r')
 350                                         buf[strlen(buf) - 1] = 0;
 351                         if (strcmp(buf, "000"))
 352                                 CtdlIPC_chat_send(ipc, buf);
 353
 354                         FD_ZERO(&read_fd);
 355                         FD_SET(ipc->sock, &read_fd);
 356                         ret = select(ipc->sock+1, &read_fd, NULL, NULL,  &tv);
 357                         err = errno;
 358                         if (err!=0)
 359                                 printf("select failed: %d", err);
 360
 361                         if (ret == -1) {
 362                                 if (!(errno == EINTR || errno == EAGAIN))
 363                                         printf("select failed: %d", err);
 364                                 return 1;
 365                         }
 366
 367                         if (ret != 0) {
 368                                 size_t n;
 369                                 char rbuf[SIZ];
 370
 371                                 rbuf[0] = '\0';
 372                                 n = read(ipc->sock, rbuf, SIZ);
 373                                 if (n>0) {
 374                                         rbuf[n]='\0';
 375                                         fprintf (stderr, rbuf);
 376                                         fflush (stdout);
 377                                 }
 378                         }
 379                         alarm(5); /* Kick the watchdog timer */
 380                 } while (strcmp(buf, "000"));
 381                 CtdlIPC_chat_send(ipc, "\n");
 382                 CtdlIPC_chat_send(ipc, "000");
 383         }
 384         alarm(0);       /* Shutdown the watchdog timer */
 385         fprintf(stderr, "sendcommand: processing ended.\n");
 386
 387         /* Clean up and log off ... unless the server indicated that the command
 388          * we sent is shutting it down, in which case we want to just cut the
 389          * connection and exit.
 390          */
 391         if (server_shutting_down) {
 392                 nq_cleanup(0);
 393         }
 394         else {
 395                 cleanup(0);
 396         }
 397         return 0;
 398 }
 399
 400
 401 /*
 402  * Stub function
 403  */
 404 void stty_ctdl(int cmd) {
 405 }
 406
 407