| 1 |
/* |
| 2 |
rdesktop: A Remote Desktop Protocol client. |
| 3 |
Entrypoint and utility functions |
| 4 |
Copyright (C) Matthew Chapman 1999-2003 |
| 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 2 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., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 19 |
*/ |
| 20 |
|
| 21 |
#include <stdarg.h> /* va_list va_start va_end */ |
| 22 |
#include <unistd.h> /* read close getuid getgid getpid getppid gethostname */ |
| 23 |
#include <fcntl.h> /* open */ |
| 24 |
#include <errno.h> /* save licence uses it. */ |
| 25 |
#include <pwd.h> /* getpwuid */ |
| 26 |
#include <termios.h> /* tcgetattr tcsetattr */ |
| 27 |
#include <sys/stat.h> /* stat */ |
| 28 |
#include <sys/time.h> /* gettimeofday */ |
| 29 |
#include <sys/times.h> /* times */ |
| 30 |
#include "rdesktop.h" |
| 31 |
|
| 32 |
#ifdef EGD_SOCKET |
| 33 |
#include <sys/socket.h> /* socket connect */ |
| 34 |
#include <sys/un.h> /* sockaddr_un */ |
| 35 |
#endif |
| 36 |
|
| 37 |
#ifdef WITH_OPENSSL |
| 38 |
#include <openssl/md5.h> |
| 39 |
#else |
| 40 |
#include "crypto/md5.h" |
| 41 |
#endif |
| 42 |
|
| 43 |
char title[32] = ""; |
| 44 |
char username[16]; |
| 45 |
char hostname[16]; |
| 46 |
char keymapname[16]; |
| 47 |
int keylayout = 0x409; /* Defaults to US keyboard layout */ |
| 48 |
int width = 800; /* If width or height are reset to zero, the geometry will |
| 49 |
be fetched from _NET_WORKAREA */ |
| 50 |
int height = 600; |
| 51 |
int tcp_port_rdp = TCP_PORT_RDP; |
| 52 |
BOOL bitmap_compression = True; |
| 53 |
BOOL sendmotion = True; |
| 54 |
BOOL orders = True; |
| 55 |
BOOL encryption = True; |
| 56 |
BOOL desktop_save = True; |
| 57 |
BOOL fullscreen = False; |
| 58 |
BOOL grab_keyboard = True; |
| 59 |
BOOL hide_decorations = False; |
| 60 |
extern BOOL owncolmap; |
| 61 |
|
| 62 |
/* Display usage information */ |
| 63 |
static void |
| 64 |
usage(char *program) |
| 65 |
{ |
| 66 |
fprintf(stderr, "rdesktop: A Remote Desktop Protocol client.\n"); |
| 67 |
fprintf(stderr, "Version " VERSION ". Copyright (C) 1999-2003 Matt Chapman.\n"); |
| 68 |
fprintf(stderr, "See http://www.rdesktop.org/ for more information.\n\n"); |
| 69 |
|
| 70 |
fprintf(stderr, "Usage: %s [options] server[:port]\n", program); |
| 71 |
fprintf(stderr, " -u: user name\n"); |
| 72 |
fprintf(stderr, " -d: domain\n"); |
| 73 |
fprintf(stderr, " -s: shell\n"); |
| 74 |
fprintf(stderr, " -c: working directory\n"); |
| 75 |
fprintf(stderr, " -p: password (- to prompt)\n"); |
| 76 |
fprintf(stderr, " -n: client hostname\n"); |
| 77 |
fprintf(stderr, " -k: keyboard layout on terminal server (us,sv,gr,etc.)\n"); |
| 78 |
fprintf(stderr, " -g: desktop geometry (WxH)\n"); |
| 79 |
fprintf(stderr, " -f: full-screen mode\n"); |
| 80 |
fprintf(stderr, " -b: force bitmap updates\n"); |
| 81 |
fprintf(stderr, " -e: disable encryption (French TS)\n"); |
| 82 |
fprintf(stderr, " -m: do not send motion events\n"); |
| 83 |
fprintf(stderr, " -C: use private colour map\n"); |
| 84 |
fprintf(stderr, " -K: keep window manager key bindings\n"); |
| 85 |
fprintf(stderr, " -T: window title\n"); |
| 86 |
fprintf(stderr, " -D: hide window manager decorations\n"); |
| 87 |
} |
| 88 |
|
| 89 |
static BOOL |
| 90 |
read_password(char *password, int size) |
| 91 |
{ |
| 92 |
struct termios tios; |
| 93 |
BOOL ret = False; |
| 94 |
int istty = 0; |
| 95 |
char *p; |
| 96 |
|
| 97 |
if (tcgetattr(STDIN_FILENO, &tios) == 0) |
| 98 |
{ |
| 99 |
fprintf(stderr, "Password: "); |
| 100 |
tios.c_lflag &= ~ECHO; |
| 101 |
tcsetattr(STDIN_FILENO, TCSANOW, &tios); |
| 102 |
istty = 1; |
| 103 |
} |
| 104 |
|
| 105 |
if (fgets(password, size, stdin) != NULL) |
| 106 |
{ |
| 107 |
ret = True; |
| 108 |
|
| 109 |
/* strip final newline */ |
| 110 |
p = strchr(password, '\n'); |
| 111 |
if (p != NULL) |
| 112 |
*p = 0; |
| 113 |
} |
| 114 |
|
| 115 |
if (istty) |
| 116 |
{ |
| 117 |
tios.c_lflag |= ECHO; |
| 118 |
tcsetattr(STDIN_FILENO, TCSANOW, &tios); |
| 119 |
fprintf(stderr, "\n"); |
| 120 |
} |
| 121 |
|
| 122 |
return ret; |
| 123 |
} |
| 124 |
|
| 125 |
/* Client program */ |
| 126 |
int |
| 127 |
main(int argc, char *argv[]) |
| 128 |
{ |
| 129 |
char server[64]; |
| 130 |
char fullhostname[64]; |
| 131 |
char domain[16]; |
| 132 |
char password[16]; |
| 133 |
char shell[128]; |
| 134 |
char directory[32]; |
| 135 |
BOOL prompt_password; |
| 136 |
struct passwd *pw; |
| 137 |
uint32 flags; |
| 138 |
char *p; |
| 139 |
int c; |
| 140 |
int username_option = 0; |
| 141 |
|
| 142 |
flags = RDP_LOGON_NORMAL; |
| 143 |
prompt_password = False; |
| 144 |
domain[0] = password[0] = shell[0] = directory[0] = 0; |
| 145 |
strcpy(keymapname, "en-us"); |
| 146 |
|
| 147 |
while ((c = getopt(argc, argv, "u:d:s:c:p:n:k:g:fbemCKT:Dh?")) != -1) |
| 148 |
{ |
| 149 |
switch (c) |
| 150 |
{ |
| 151 |
case 'u': |
| 152 |
STRNCPY(username, optarg, sizeof(username)); |
| 153 |
username_option = 1; |
| 154 |
break; |
| 155 |
|
| 156 |
case 'd': |
| 157 |
STRNCPY(domain, optarg, sizeof(domain)); |
| 158 |
break; |
| 159 |
|
| 160 |
case 's': |
| 161 |
STRNCPY(shell, optarg, sizeof(shell)); |
| 162 |
break; |
| 163 |
|
| 164 |
case 'c': |
| 165 |
STRNCPY(directory, optarg, sizeof(directory)); |
| 166 |
break; |
| 167 |
|
| 168 |
case 'p': |
| 169 |
if ((optarg[0] == '-') && (optarg[1] == 0)) |
| 170 |
{ |
| 171 |
prompt_password = True; |
| 172 |
break; |
| 173 |
} |
| 174 |
|
| 175 |
STRNCPY(password, optarg, sizeof(password)); |
| 176 |
flags |= RDP_LOGON_AUTO; |
| 177 |
|
| 178 |
/* try to overwrite argument so it won't appear in ps */ |
| 179 |
p = optarg; |
| 180 |
while (*p) |
| 181 |
*(p++) = 'X'; |
| 182 |
break; |
| 183 |
|
| 184 |
case 'n': |
| 185 |
STRNCPY(hostname, optarg, sizeof(hostname)); |
| 186 |
break; |
| 187 |
|
| 188 |
case 'k': |
| 189 |
STRNCPY(keymapname, optarg, sizeof(keymapname)); |
| 190 |
break; |
| 191 |
|
| 192 |
case 'g': |
| 193 |
if (!strcmp(optarg, "workarea")) |
| 194 |
{ |
| 195 |
width = height = 0; |
| 196 |
break; |
| 197 |
} |
| 198 |
|
| 199 |
width = strtol(optarg, &p, 10); |
| 200 |
if (*p == 'x') |
| 201 |
height = strtol(p + 1, NULL, 10); |
| 202 |
|
| 203 |
if ((width == 0) || (height == 0)) |
| 204 |
{ |
| 205 |
error("invalid geometry\n"); |
| 206 |
return 1; |
| 207 |
} |
| 208 |
break; |
| 209 |
|
| 210 |
case 'f': |
| 211 |
fullscreen = True; |
| 212 |
break; |
| 213 |
|
| 214 |
case 'b': |
| 215 |
orders = False; |
| 216 |
break; |
| 217 |
|
| 218 |
case 'e': |
| 219 |
encryption = False; |
| 220 |
break; |
| 221 |
|
| 222 |
case 'm': |
| 223 |
sendmotion = False; |
| 224 |
break; |
| 225 |
|
| 226 |
case 'C': |
| 227 |
owncolmap = True; |
| 228 |
break; |
| 229 |
|
| 230 |
case 'K': |
| 231 |
grab_keyboard = False; |
| 232 |
break; |
| 233 |
|
| 234 |
case 'T': |
| 235 |
STRNCPY(title, optarg, sizeof(title)); |
| 236 |
break; |
| 237 |
|
| 238 |
case 'D': |
| 239 |
hide_decorations = True; |
| 240 |
break; |
| 241 |
|
| 242 |
case 'h': |
| 243 |
case '?': |
| 244 |
default: |
| 245 |
usage(argv[0]); |
| 246 |
return 1; |
| 247 |
} |
| 248 |
} |
| 249 |
|
| 250 |
if (argc - optind < 1) |
| 251 |
{ |
| 252 |
usage(argv[0]); |
| 253 |
return 1; |
| 254 |
} |
| 255 |
|
| 256 |
STRNCPY(server, argv[optind], sizeof(server)); |
| 257 |
p = strchr(server, ':'); |
| 258 |
if (p != NULL) |
| 259 |
{ |
| 260 |
tcp_port_rdp = strtol(p + 1, NULL, 10); |
| 261 |
*p = 0; |
| 262 |
} |
| 263 |
|
| 264 |
if (!username_option) |
| 265 |
{ |
| 266 |
pw = getpwuid(getuid()); |
| 267 |
if ((pw == NULL) || (pw->pw_name == NULL)) |
| 268 |
{ |
| 269 |
error("could not determine username, use -u\n"); |
| 270 |
return 1; |
| 271 |
} |
| 272 |
|
| 273 |
STRNCPY(username, pw->pw_name, sizeof(username)); |
| 274 |
} |
| 275 |
|
| 276 |
if (hostname[0] == 0) |
| 277 |
{ |
| 278 |
if (gethostname(fullhostname, sizeof(fullhostname)) == -1) |
| 279 |
{ |
| 280 |
error("could not determine local hostname, use -n\n"); |
| 281 |
return 1; |
| 282 |
} |
| 283 |
|
| 284 |
p = strchr(fullhostname, '.'); |
| 285 |
if (p != NULL) |
| 286 |
*p = 0; |
| 287 |
|
| 288 |
STRNCPY(hostname, fullhostname, sizeof(hostname)); |
| 289 |
} |
| 290 |
|
| 291 |
if (prompt_password && read_password(password, sizeof(password))) |
| 292 |
flags |= RDP_LOGON_AUTO; |
| 293 |
|
| 294 |
if (title[0] == 0) |
| 295 |
{ |
| 296 |
strcpy(title, "rdesktop - "); |
| 297 |
strncat(title, server, sizeof(title) - sizeof("rdesktop - ")); |
| 298 |
} |
| 299 |
|
| 300 |
if (!ui_init()) |
| 301 |
return 1; |
| 302 |
|
| 303 |
if (!rdp_connect(server, flags, domain, password, shell, directory)) |
| 304 |
return 1; |
| 305 |
|
| 306 |
DEBUG(("Connection successful.\n")); |
| 307 |
memset(password, 0, sizeof(password)); |
| 308 |
|
| 309 |
if (ui_create_window()) |
| 310 |
{ |
| 311 |
rdp_main_loop(); |
| 312 |
ui_destroy_window(); |
| 313 |
} |
| 314 |
|
| 315 |
DEBUG(("Disconnecting...\n")); |
| 316 |
rdp_disconnect(); |
| 317 |
ui_deinit(); |
| 318 |
return 0; |
| 319 |
} |
| 320 |
|
| 321 |
#ifdef EGD_SOCKET |
| 322 |
/* Read 32 random bytes from PRNGD or EGD socket (based on OpenSSL RAND_egd) */ |
| 323 |
static BOOL |
| 324 |
generate_random_egd(uint8 * buf) |
| 325 |
{ |
| 326 |
struct sockaddr_un addr; |
| 327 |
BOOL ret = False; |
| 328 |
int fd; |
| 329 |
|
| 330 |
fd = socket(AF_UNIX, SOCK_STREAM, 0); |
| 331 |
if (fd == -1) |
| 332 |
return False; |
| 333 |
|
| 334 |
addr.sun_family = AF_UNIX; |
| 335 |
memcpy(addr.sun_path, EGD_SOCKET, sizeof(EGD_SOCKET)); |
| 336 |
if (connect(fd, (struct sockaddr *) &addr, sizeof(addr)) == -1) |
| 337 |
goto err; |
| 338 |
|
| 339 |
/* PRNGD and EGD use a simple communications protocol */ |
| 340 |
buf[0] = 1; /* Non-blocking (similar to /dev/urandom) */ |
| 341 |
buf[1] = 32; /* Number of requested random bytes */ |
| 342 |
if (write(fd, buf, 2) != 2) |
| 343 |
goto err; |
| 344 |
|
| 345 |
if ((read(fd, buf, 1) != 1) || (buf[0] == 0)) /* Available? */ |
| 346 |
goto err; |
| 347 |
|
| 348 |
if (read(fd, buf, 32) != 32) |
| 349 |
goto err; |
| 350 |
|
| 351 |
ret = True; |
| 352 |
|
| 353 |
err: |
| 354 |
close(fd); |
| 355 |
return ret; |
| 356 |
} |
| 357 |
#endif |
| 358 |
|
| 359 |
/* Generate a 32-byte random for the secure transport code. */ |
| 360 |
void |
| 361 |
generate_random(uint8 * random) |
| 362 |
{ |
| 363 |
struct stat st; |
| 364 |
struct tms tmsbuf; |
| 365 |
MD5_CTX md5; |
| 366 |
uint32 *r; |
| 367 |
int fd, n; |
| 368 |
|
| 369 |
/* If we have a kernel random device, try that first */ |
| 370 |
if (((fd = open("/dev/urandom", O_RDONLY)) != -1) |
| 371 |
|| ((fd = open("/dev/random", O_RDONLY)) != -1)) |
| 372 |
{ |
| 373 |
n = read(fd, random, 32); |
| 374 |
close(fd); |
| 375 |
if (n == 32) |
| 376 |
return; |
| 377 |
} |
| 378 |
|
| 379 |
#ifdef EGD_SOCKET |
| 380 |
/* As a second preference use an EGD */ |
| 381 |
if (generate_random_egd(random)) |
| 382 |
return; |
| 383 |
#endif |
| 384 |
|
| 385 |
/* Otherwise use whatever entropy we can gather - ideas welcome. */ |
| 386 |
r = (uint32 *) random; |
| 387 |
r[0] = (getpid()) | (getppid() << 16); |
| 388 |
r[1] = (getuid()) | (getgid() << 16); |
| 389 |
r[2] = times(&tmsbuf); /* system uptime (clocks) */ |
| 390 |
gettimeofday((struct timeval *) &r[3], NULL); /* sec and usec */ |
| 391 |
stat("/tmp", &st); |
| 392 |
r[5] = st.st_atime; |
| 393 |
r[6] = st.st_mtime; |
| 394 |
r[7] = st.st_ctime; |
| 395 |
|
| 396 |
/* Hash both halves with MD5 to obscure possible patterns */ |
| 397 |
MD5_Init(&md5); |
| 398 |
MD5_Update(&md5, random, 16); |
| 399 |
MD5_Final(random, &md5); |
| 400 |
MD5_Update(&md5, random + 16, 16); |
| 401 |
MD5_Final(random + 16, &md5); |
| 402 |
} |
| 403 |
|
| 404 |
/* malloc; exit if out of memory */ |
| 405 |
void * |
| 406 |
xmalloc(int size) |
| 407 |
{ |
| 408 |
void *mem = malloc(size); |
| 409 |
if (mem == NULL) |
| 410 |
{ |
| 411 |
error("xmalloc %d\n", size); |
| 412 |
exit(1); |
| 413 |
} |
| 414 |
return mem; |
| 415 |
} |
| 416 |
|
| 417 |
/* realloc; exit if out of memory */ |
| 418 |
void * |
| 419 |
xrealloc(void *oldmem, int size) |
| 420 |
{ |
| 421 |
void *mem = realloc(oldmem, size); |
| 422 |
if (mem == NULL) |
| 423 |
{ |
| 424 |
error("xrealloc %d\n", size); |
| 425 |
exit(1); |
| 426 |
} |
| 427 |
return mem; |
| 428 |
} |
| 429 |
|
| 430 |
/* free */ |
| 431 |
void |
| 432 |
xfree(void *mem) |
| 433 |
{ |
| 434 |
free(mem); |
| 435 |
} |
| 436 |
|
| 437 |
/* report an error */ |
| 438 |
void |
| 439 |
error(char *format, ...) |
| 440 |
{ |
| 441 |
va_list ap; |
| 442 |
|
| 443 |
fprintf(stderr, "ERROR: "); |
| 444 |
|
| 445 |
va_start(ap, format); |
| 446 |
vfprintf(stderr, format, ap); |
| 447 |
va_end(ap); |
| 448 |
} |
| 449 |
|
| 450 |
/* report a warning */ |
| 451 |
void |
| 452 |
warning(char *format, ...) |
| 453 |
{ |
| 454 |
va_list ap; |
| 455 |
|
| 456 |
fprintf(stderr, "WARNING: "); |
| 457 |
|
| 458 |
va_start(ap, format); |
| 459 |
vfprintf(stderr, format, ap); |
| 460 |
va_end(ap); |
| 461 |
} |
| 462 |
|
| 463 |
/* report an unimplemented protocol feature */ |
| 464 |
void |
| 465 |
unimpl(char *format, ...) |
| 466 |
{ |
| 467 |
va_list ap; |
| 468 |
|
| 469 |
fprintf(stderr, "NOT IMPLEMENTED: "); |
| 470 |
|
| 471 |
va_start(ap, format); |
| 472 |
vfprintf(stderr, format, ap); |
| 473 |
va_end(ap); |
| 474 |
} |
| 475 |
|
| 476 |
/* produce a hex dump */ |
| 477 |
void |
| 478 |
hexdump(unsigned char *p, unsigned int len) |
| 479 |
{ |
| 480 |
unsigned char *line = p; |
| 481 |
unsigned int thisline, offset = 0; |
| 482 |
int i; |
| 483 |
|
| 484 |
while (offset < len) |
| 485 |
{ |
| 486 |
printf("%04x ", offset); |
| 487 |
thisline = len - offset; |
| 488 |
if (thisline > 16) |
| 489 |
thisline = 16; |
| 490 |
|
| 491 |
for (i = 0; i < thisline; i++) |
| 492 |
printf("%02x ", line[i]); |
| 493 |
|
| 494 |
for (; i < 16; i++) |
| 495 |
printf(" "); |
| 496 |
|
| 497 |
for (i = 0; i < thisline; i++) |
| 498 |
printf("%c", (line[i] >= 0x20 && line[i] < 0x7f) ? line[i] : '.'); |
| 499 |
|
| 500 |
printf("\n"); |
| 501 |
offset += thisline; |
| 502 |
line += thisline; |
| 503 |
} |
| 504 |
} |
| 505 |
|
| 506 |
#ifdef SAVE_LICENCE |
| 507 |
int |
| 508 |
load_licence(unsigned char **data) |
| 509 |
{ |
| 510 |
char *path; |
| 511 |
char *home; |
| 512 |
struct stat st; |
| 513 |
int fd; |
| 514 |
|
| 515 |
home = getenv("HOME"); |
| 516 |
if (home == NULL) |
| 517 |
return -1; |
| 518 |
|
| 519 |
path = xmalloc(strlen(home) + strlen(hostname) + 20); |
| 520 |
sprintf(path, "%s/.rdesktop/licence.%s", home, hostname); |
| 521 |
|
| 522 |
fd = open(path, O_RDONLY); |
| 523 |
if (fd == -1) |
| 524 |
return -1; |
| 525 |
|
| 526 |
if (fstat(fd, &st)) |
| 527 |
return -1; |
| 528 |
|
| 529 |
*data = xmalloc(st.st_size); |
| 530 |
return read(fd, *data, st.st_size); |
| 531 |
} |
| 532 |
|
| 533 |
void |
| 534 |
save_licence(unsigned char *data, int length) |
| 535 |
{ |
| 536 |
char *fpath; /* file path for licence */ |
| 537 |
char *fname, *fnamewrk; /* file name for licence .inkl path. */ |
| 538 |
char *home; |
| 539 |
uint32 y; |
| 540 |
struct flock fnfl; |
| 541 |
int fnfd, fnwrkfd, i, wlen; |
| 542 |
struct stream s, *s_ptr; |
| 543 |
uint32 len; |
| 544 |
|
| 545 |
/* Construct a stream, so that we can use macros to extract the |
| 546 |
* licence. |
| 547 |
*/ |
| 548 |
s_ptr = &s; |
| 549 |
s_ptr->p = data; |
| 550 |
/* Skip first two bytes */ |
| 551 |
in_uint16(s_ptr, len); |
| 552 |
|
| 553 |
/* Skip three strings */ |
| 554 |
for (i = 0; i < 3; i++) |
| 555 |
{ |
| 556 |
in_uint32(s_ptr, len); |
| 557 |
s_ptr->p += len; |
| 558 |
/* Make sure that we won't be past the end of data after |
| 559 |
* reading the next length value |
| 560 |
*/ |
| 561 |
if ((s_ptr->p) + 4 > data + length) |
| 562 |
{ |
| 563 |
printf("Error in parsing licence key.\n"); |
| 564 |
printf("Strings %d end value %x > supplied length (%x)\n", |
| 565 |
i, s_ptr->p, data + length); |
| 566 |
return; |
| 567 |
} |
| 568 |
} |
| 569 |
in_uint32(s_ptr, len); |
| 570 |
if (s_ptr->p + len > data + length) |
| 571 |
{ |
| 572 |
printf("Error in parsing licence key.\n"); |
| 573 |
printf("End of licence %x > supplied length (%x)\n", s_ptr->p + len, data + length); |
| 574 |
return; |
| 575 |
} |
| 576 |
|
| 577 |
home = getenv("HOME"); |
| 578 |
if (home == NULL) |
| 579 |
return; |
| 580 |
|
| 581 |
/* set and create the directory -- if it doesn't exist. */ |
| 582 |
fpath = xmalloc(strlen(home) + 11); |
| 583 |
STRNCPY(fpath, home, strlen(home) + 1); |
| 584 |
|
| 585 |
sprintf(fpath, "%s/.rdesktop", fpath); |
| 586 |
if (mkdir(fpath, 0700) == -1 && errno != EEXIST) |
| 587 |
{ |
| 588 |
perror("mkdir"); |
| 589 |
exit(1); |
| 590 |
} |
| 591 |
|
| 592 |
/* set the real licence filename, and put a write lock on it. */ |
| 593 |
fname = xmalloc(strlen(fpath) + strlen(hostname) + 10); |
| 594 |
sprintf(fname, "%s/licence.%s", fpath, hostname); |
| 595 |
fnfd = open(fname, O_RDONLY); |
| 596 |
if (fnfd != -1) |
| 597 |
{ |
| 598 |
fnfl.l_type = F_WRLCK; |
| 599 |
fnfl.l_whence = SEEK_SET; |
| 600 |
fnfl.l_start = 0; |
| 601 |
fnfl.l_len = 1; |
| 602 |
fcntl(fnfd, F_SETLK, &fnfl); |
| 603 |
} |
| 604 |
|
| 605 |
/* create a temporary licence file */ |
| 606 |
fnamewrk = xmalloc(strlen(fname) + 12); |
| 607 |
for (y = 0;; y++) |
| 608 |
{ |
| 609 |
sprintf(fnamewrk, "%s.%lu", fname, y); |
| 610 |
fnwrkfd = open(fnamewrk, O_WRONLY | O_CREAT | O_EXCL, 0600); |
| 611 |
if (fnwrkfd == -1) |
| 612 |
{ |
| 613 |
if (errno == EINTR || errno == EEXIST) |
| 614 |
continue; |
| 615 |
perror("create"); |
| 616 |
exit(1); |
| 617 |
} |
| 618 |
break; |
| 619 |
} |
| 620 |
/* write to the licence file */ |
| 621 |
for (y = 0; y < len;) |
| 622 |
{ |
| 623 |
do |
| 624 |
{ |
| 625 |
wlen = write(fnwrkfd, s_ptr->p + y, len - y); |
| 626 |
} |
| 627 |
while (wlen == -1 && errno == EINTR); |
| 628 |
if (wlen < 1) |
| 629 |
{ |
| 630 |
perror("write"); |
| 631 |
unlink(fnamewrk); |
| 632 |
exit(1); |
| 633 |
} |
| 634 |
y += wlen; |
| 635 |
} |
| 636 |
|
| 637 |
/* close the file and rename it to fname */ |
| 638 |
if (close(fnwrkfd) == -1) |
| 639 |
{ |
| 640 |
perror("close"); |
| 641 |
unlink(fnamewrk); |
| 642 |
exit(1); |
| 643 |
} |
| 644 |
if (rename(fnamewrk, fname) == -1) |
| 645 |
{ |
| 646 |
perror("rename"); |
| 647 |
unlink(fnamewrk); |
| 648 |
exit(1); |
| 649 |
} |
| 650 |
/* close the file lock on fname */ |
| 651 |
if (fnfd != -1) |
| 652 |
{ |
| 653 |
fnfl.l_type = F_UNLCK; |
| 654 |
fnfl.l_whence = SEEK_SET; |
| 655 |
fnfl.l_start = 0; |
| 656 |
fnfl.l_len = 1; |
| 657 |
fcntl(fnfd, F_SETLK, &fnfl); |
| 658 |
close(fnfd); |
| 659 |
} |
| 660 |
|
| 661 |
} |
| 662 |
#endif |
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