1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593
|
/*
* DSH / dancer's shell or the distributed shell
* Copyright (C) 2001, 2002, 2003, 2004, 2005, 2007 Junichi Uekawa
*
* This program 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.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Command-line and parameter handling routines.
*/
#define _GNU_SOURCE
#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <unistd.h>
#include <netdb.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/wait.h>
#include "dsh.h"
#ifdef HAVE_NETGROUP_H
#include <netgroup.h>
#endif
#ifdef HAVE_GETOPT_H
#include <getopt.h>
#endif
#include "linkedlist.h"
#include "parameter.h"
#include "libdshconfig.h"
#include "gettext.h"
#define _(A) gettext(A)
/**
* allocate memory, and abort with error
*
* @return allocated memory
*/
void *
malloc_with_error(int size)
{
void * u = malloc (size);
if (!u)
{
fprintf (stderr, _("%s: failed to allocate memory of %i bytes\n"), PACKAGE, size);
exit(1);
}
return u;
}
/**
* remove \n and other things from string
* and return the new pointer.
*
* Will skip lines starting with a #
*/
static const char *
stripwhitespace(char * buf)
{
char * pointer = buf;
char * revpointer;
while (*pointer && isspace(*pointer))
pointer ++;
if ((!*pointer) ||
(*pointer == '#'))
/* if it is nothing, or is a comment return NULL */
return NULL;
revpointer = pointer + strlen (pointer) - 1;
/* strip whitespace from end. */
while (revpointer > pointer && isspace(*revpointer))
*(revpointer --) = 0;
return pointer;
}
/**
* Add hostname to machinelist if and only if
* the host does not already exist in the machine list.
*
* @return linked list where machinename is added if it does not exist already
*/
static linkedlist *
machinelist_lladd(linkedlist * machinelist,
const char * machinename)
{
if (llmatch(machinelist, machinename)) /* if there is match, ignore */
return machinelist;
else
return lladd(machinelist, machinename);
}
/*
* Load machine list from netgroup (typically NIS)
*
* Code contributed from Petter Reinholdtsen on 22 Dec 2001.
*/
linkedlist*
read_machinenetgroup(linkedlist * machinelist,
const char * groupname)
{
#ifdef HAVE_SETNETGRENT
#ifdef SETNETGRENT_RETURNS_VOID
#define WORKAROUND_SETNETGRENT , 1
#else
#define WORKAROUND_SETNETGRENT
#endif
if (setnetgrent(groupname) WORKAROUND_SETNETGRENT)
{
char *hostp=NULL, *userp=NULL, *domainp=NULL;
while (getnetgrent(&hostp, &userp, &domainp))
{
if (NULL != hostp)
machinelist = machinelist_lladd(machinelist, hostp);
}
endnetgrent();
}
else
{
fprintf(stderr,
_("%s: Unknown netgroup %s.\n"),
PACKAGE, groupname);
exit (1); /* it should fail on error. */
}
#else /* HAVE_SETNETGRENT */
fprintf(stderr, "%s: %s\n", PACKAGE,
_("This platform does not support NIS database routines"));
#warning "disabled setnetgrent support"
#endif
return machinelist;
}
/**
* read the machine list file from file.
*/
linkedlist*
read_machinelist(linkedlist * machinelist, const char * listfile, const char*alternatelistfile)
{
FILE * f;
size_t bufferlen = 1024;
char * buf = malloc_with_error(bufferlen);
if ((f = fopen (listfile, "r")) || ((NULL != alternatelistfile) && (f=fopen(alternatelistfile, "r"))))
{
while (-1 != getline (&buf, &bufferlen, f))
{
const char * strippedstring = stripwhitespace(buf);
if (strippedstring)
machinelist=machinelist_lladd(machinelist,strippedstring);
}
fclose(f);
}
else
{
if (alternatelistfile)
fprintf (stderr,
_("%s: File %s nor %s could not be opened for read\n"),
PACKAGE, listfile, alternatelistfile);
else
fprintf (stderr,
_("%s: File %s could not be opened for read\n"),
PACKAGE, listfile);
exit (1); /* It should fail on error */
}
free (buf);
return machinelist;
}
/**
* Print version string
*/
int print_version(void)
{
printf(_("Distributed Shell / Dancer\'s shell version %s \n"
"Copyright 2001-2005 Junichi Uekawa, \n"
"distributed under the terms and conditions of GPL version 2\n\n"),
VERSION);
return 0;
}
/**
* print help
*/
int
print_help (void)
{
print_version();
printf(_(
"-v --verbose Verbose output\n"
"-q --quiet Quiet\n"
"-M --show-machine-names Prepend the host name on output\n"
"-H --hide-machine-names Do not prepend host name on output\n"
"-i --duplicate-input Duplicate input given to dsh\n"
"-b --bufsize Change buffer size used in input duplication\n"
"-m --machine [machinename] Execute on machine\n"
"-n --num-topology How to divide the machines\n"
"-a --all Execute on all machines\n"
"-g --group [groupname] Execute on group member\n"
"-f --file [file] Use the file as list of machines\n"
"-r --remoteshell [shellname] Execute using shell (rsh/ssh)\n"
"-o --remoteshellopt [option] Option to give to shell \n"
"-h --help Give out this message\n"
"-w --wait-shell Sequentially execute shell\n"
"-c --concurrent-shell Execute shell concurrently\n"
"-F --forklimit [fork limit] Concurrent with limit on number\n"
"-V --version Give out version information\n\n")
);
return 0;
}
/**
* load the configuration file.
*/
int
load_configfile(const char * dsh_conf)
{
dshconfig * t;
dshconfig_internal * line;
FILE*f = fopen (dsh_conf, "r");
char * buf_a=NULL;
char * buf_b=NULL;
if(verbose_flag) printf(_("Loading config file %s\n"), dsh_conf);
if (f && (t = open_dshconfig(f, '=')))
{
for (line = t->config; line; line=line->next)
{
buf_a = line -> title;
buf_b = line -> data;
if(verbose_flag) printf(_(" Parameter %s is %s\n"), buf_a, buf_b);
if (!strcmp(buf_a, "remoteshell"))
{
if (verbose_flag) printf(_("Using %s as the remote shell\n"), buf_b);
remoteshell_command = strdup (buf_b);
}
else if (!strcmp(buf_a, "remoteshellopt"))
{
if (verbose_flag) printf(_("Adding [%s] to shell options\n"), buf_b);
remoteshell_command_opt_r = lladd (remoteshell_command_opt_r, buf_b);
}
else if (!strcmp(buf_a, "waitshell"))
{
wait_shell = atoi ( buf_b );
if (verbose_flag) printf(_("Setting wait-shell to [%i]\n"), wait_shell);
}
else if (!strcmp(buf_a, "showmachinenames"))
{
pipe_option |= (atoi ( buf_b ) != 0 );
if (verbose_flag) printf(_("Setting pipe option to [%i]\n"), pipe_option);
}
else if (!strcmp(buf_a, "forklimit"))
{
forklimit = atoi ( buf_b );
wait_shell = 0;
if (verbose_flag)
{
printf(_("Setting fork limit to [%i] and wait_shell to [%i]\n"), forklimit, wait_shell);
}
}
else if (!strcmp(buf_a, "verbose"))
{
verbose_flag = atoi ( buf_b );
if (verbose_flag) printf(_("Setting verbose to [%i]\n"), verbose_flag);
}
else
{
fprintf (stderr,
_("%s: unparsed configuration file line %s found in %s\n"),
PACKAGE, buf_a, dsh_conf);
}
}
free_dshconfig(t);
fclose(f);
}
return 0;
}
/**
* open /dev/null as stdin
*/
void
open_devnull(void)
{
int in = open ("/dev/null", O_RDONLY);
dup2 (in, 0);
}
/**
* Split the option string with "," as delimiter, and
* add the hostnames to the linked list.
*
* @return linked list with items added.
*/
static linkedlist*
split_machines_list_and_add_machines(linkedlist* machinelist, const char * optarg)
{
char * s = strdup (optarg);
char * next ;
char * current = s;
while ((next = strchr(current,',')))
{
*next = 0;
machinelist = machinelist_lladd(machinelist, current);
current = next + 1;
}
machinelist = machinelist_lladd(machinelist, current);
free(s);
return machinelist;
}
/**
* Sanity checking routine, to check that options are valid.
*
* @return 0 on success
* @return 1 on failure
*/
static int
sanity_checking(void)
{
if ((pipe_option & PIPE_OPTION_INPUT) && wait_shell )
{
fprintf (stderr, _("%s: Input duplication and concurrent shell need to be specified together\n"), PACKAGE);
return 1;
}
if (forklimit < 0 )
{
fprintf (stderr, "%s: %s", PACKAGE, _("Cannot specify fork limit of less than 0\n"));
return 1;
}
if ((pipe_option & PIPE_OPTION_INPUT) && (forklimit > 0 ))
{
fprintf (stderr, _("%s: Input duplication and concurrent shell without fork limit need to be specified together\n"), PACKAGE);
return 1;
}
if ((wait_shell == 1) && (forklimit > 0 ))
{
fprintf (stderr, _("%s: fork limit and wait shell cannot be specified at the same time\n"), PACKAGE);
return 1;
}
return 0;
}
/**
* Option parsing routine.
*
* Remember to update other places, such as execute_rsh_multiple routine when changing here.
* @return 1 on failure.
* @return 0 on success.
*/
int
parse_options ( int ac, char ** av)
{
int c; /* option */
linkedlist * machinelist = NULL;
linkedlist * rshcommandline_r = NULL; /* command line for rsh in reverse order*/
#ifdef HAVE_GETOPT_LONG
int index_point;
static struct option long_options[]=
{
{"verbose", no_argument, 0, 'v'},
{"quiet", no_argument, 0, 'q'},
{"show-machine-names", no_argument, 0, 'M'},
{"hide-machine-names", no_argument, 0, 'H'},
{"duplicate-input", no_argument, 0, 'i'},
{"bufsize", required_argument, 0, 'b'},
/* machine-specification */
{"machine", required_argument, 0, 'm'},
{"num-topology", required_argument, 0, 'n'},
{"all", no_argument, 0, 'a' },
{"group", required_argument, 0, 'g'},
{"file", required_argument, 0, 'f'},
/* rsh/ssh specification */
{"remoteshell", required_argument, 0, 'r'},
{"remoteshellopt", required_argument, 0, 'o'},
{"help", no_argument, 0, 'h'},
{"version", no_argument, 0, 'V'},
{"wait-shell", no_argument, 0, 'w'},
{"concurrent-shell", no_argument, 0, 'c'},
{"forklimit", required_argument, 0, 'F'},
{0,0,0,0}
};
#else
#define getopt_long(a,b,c,d,e) getopt(a,b,c)
#endif
#ifdef GETOPT_WITH_GNU_REORDERING_EXTENTION
#define EXTRAVALUE "+" /* add this to get GNU getopt to work in POSIX manner */
#else
#define EXTRAVALUE
#endif
while((c = getopt_long (ac, av,
EXTRAVALUE "vqm:ar:f:g:hVcwo:MHn:ib:F:",
long_options, &index_point)) != -1)
{
switch (c)
{
case 'a':
if (verbose_flag) printf (_("Adding all machines to the list\n"));
{
char * buf;
if (asprintf(&buf, "%s/.dsh/machines.list", getenv("HOME"))<0)
{
fprintf (stderr, _("%s: asprintf failed\n"), PACKAGE);
return 1;
}
machinelist = read_machinelist(machinelist, buf, DSHCONFDIR"/machines.list");
free (buf);
}
break;
case 'g':
{
if ('@' == *optarg)
{ /* using libc call for using netgroup. */
/* +1 to skip @ */
if (verbose_flag) printf (_("Adding netgroup %s to the list\n"), optarg + 1);
machinelist = read_machinenetgroup(machinelist, optarg+1);
}
else
{ /* using dsh's own method. */
char * buf1, *buf2;
if (verbose_flag) printf (_("Adding group %s to the list\n"), optarg);
if (asprintf(&buf1, DSHCONFDIR"/group/%s", optarg) < 0)
{
fprintf (stderr, _("%s: asprintf failed\n"), PACKAGE);
return 1;
}
if (asprintf(&buf2, "%s/.dsh/group/%s", getenv("HOME"), optarg)<0)
{
fprintf (stderr, _("%s: asprintf failed\n"), PACKAGE);
return 1;
}
machinelist = read_machinelist (machinelist, buf2, buf1);
free(buf1);free(buf2);
}
}
break;
case 'f':
if (verbose_flag) printf (_("Adding file %s to the list\n"), optarg);
machinelist = read_machinelist (machinelist, optarg, NULL);
break;
case 'F':
forklimit = atoi (optarg);
wait_shell = 0;
if (verbose_flag) printf (_("Setting forklimit to %i and wait_shell to %i\n"), forklimit, wait_shell);
break;
case 'v':
if (verbose_flag) printf (_("Verbose flag on\n"));
verbose_flag=1;
break;
case 'q':
if (verbose_flag) printf (_("Verbose flag off\n"));
verbose_flag=0;
break;
case 'M':
if (verbose_flag) printf (_("Show machine names on output\n"));
pipe_option |= PIPE_OPTION_OUTPUT;
break;
case 'H':
if (verbose_flag) printf (_("Dont show machine names on output\n"));
pipe_option &= ~(PIPE_OPTION_OUTPUT);
break;
case 'i':
if (verbose_flag) printf (_("Duplicate input to all processes\n"));
pipe_option |= PIPE_OPTION_INPUT;
break;
case 'b':
if (verbose_flag) printf (_("Buffer size used for dupliation\n"));
buffer_size = atoi(optarg);
if (buffer_size < 1)
{
fprintf (stderr, _("Buffer size needs to be greater than 1\n"));
return 1;
}
break;
case 'm':
if (verbose_flag) printf (_("Adding machine %s to list\n"), optarg);
machinelist = split_machines_list_and_add_machines (machinelist, optarg);
break;
case 'n':
if (verbose_flag) printf (_("Topology number set to %s\n"), optarg);
num_topology = atoi (optarg);
break;
case 'h':
print_help();
exit(1);
break;
case 'V':
print_version();
exit(1);
break;
case 'r': /* specify the shell command */
if (verbose_flag) printf(_("Using %s as the remote shell\n"), optarg);
remoteshell_command = strdup (optarg);
break;
case 'o': /* specify the shell command options */
if (verbose_flag) printf(_("Adding [%s] to shell options\n"), optarg);
remoteshell_command_opt_r = lladd (remoteshell_command_opt_r, optarg);
break;
case 'w': /* wait shell */
if (verbose_flag) printf (_("Wait for shell to finish executing\n"));
wait_shell=1;
break;
case 'c': /* concurrent shell */
if (verbose_flag) printf (_("Do not wait for shell to finish\n"));
wait_shell=0;
break;
case '?':
#ifndef HAVE_GETOPT_LONG
/* getopt-long handles this option properly. */
if (isprint (optopt))
fprintf (stderr, _("Unkown option -%c.\n"), optopt);
else
fprintf (stderr, _("Unkown option character 0x%x.\n"), optopt);
#endif
return 1;
default:
if (verbose_flag) printf (_("Unhandled option\n"));
break;
}
}
if (!machinelist)
{
fprintf (stderr, _("%s: no machine specified\n"), PACKAGE);
return 1;
}
{ /* generate the command line for remote. */
int i;
for (i=optind; i < ac; ++i)
{
rshcommandline_r = lladd(rshcommandline_r, av[i]);
}
}
/* do sanity checking, and exit if it fails. */
if (sanity_checking())
return 1;
if (!(pipe_option & PIPE_OPTION_INPUT))
open_devnull(); /* open /dev/null if no input pipe is required */
/* reverse the list, which is in reverse order, to make the right order */
machinelist = llreverse (machinelist);
/* actually execute the code. */
return do_shell(machinelist, rshcommandline_r);
}
|