| 1 |
/* |
| 2 |
* static char *rcsid_porting_c = |
| 3 |
* "$Id: porting.C,v 1.2 2006-08-29 08:01:35 root Exp $"; |
| 4 |
*/ |
| 5 |
|
| 6 |
/* |
| 7 |
CrossFire, A Multiplayer game for X-windows |
| 8 |
|
| 9 |
Copyright (C) 2002 Mark Wedel & Crossfire Development Team |
| 10 |
Copyright (C) 1992 Frank Tore Johansen |
| 11 |
|
| 12 |
This program is free software; you can redistribute it and/or modify |
| 13 |
it under the terms of the GNU General Public License as published by |
| 14 |
the Free Software Foundation; either version 2 of the License, or |
| 15 |
(at your option) any later version. |
| 16 |
|
| 17 |
This program is distributed in the hope that it will be useful, |
| 18 |
but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 19 |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 20 |
GNU General Public License for more details. |
| 21 |
|
| 22 |
You should have received a copy of the GNU General Public License |
| 23 |
along with this program; if not, write to the Free Software |
| 24 |
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 25 |
|
| 26 |
The authors can be reached via e-mail at crossfire-devel@real-time.com |
| 27 |
*/ |
| 28 |
|
| 29 |
/* This file contains various functions that are not really unique for |
| 30 |
* crossfire, but rather provides what should be standard functions |
| 31 |
* for systems that do not have them. In this way, most of the |
| 32 |
* nasty system dependent stuff is contained here, with the program |
| 33 |
* calling these functions. |
| 34 |
*/ |
| 35 |
|
| 36 |
|
| 37 |
#ifdef WIN32 /* ---win32 exclude/include headers */ |
| 38 |
#include "process.h" |
| 39 |
#define pid_t int /* we include it non global, because there is a redefinition in python.h */ |
| 40 |
#else |
| 41 |
#include <ctype.h> |
| 42 |
#include <sys/stat.h> |
| 43 |
#include <sys/wait.h> |
| 44 |
|
| 45 |
#include <sys/param.h> |
| 46 |
#include <stdio.h> |
| 47 |
|
| 48 |
/* Need to pull in the HAVE_... values somehow */ |
| 49 |
/* win32 reminder: always put this in a ifndef win32 block */ |
| 50 |
#include <autoconf.h> |
| 51 |
#endif |
| 52 |
|
| 53 |
|
| 54 |
#ifdef HAVE_STDLIB_H |
| 55 |
#include <stdlib.h> |
| 56 |
#endif |
| 57 |
|
| 58 |
#ifdef HAVE_UNISTD_H |
| 59 |
#include <unistd.h> |
| 60 |
#endif |
| 61 |
|
| 62 |
#include <stdarg.h> |
| 63 |
/* Has to be after above includes so we don't redefine some values */ |
| 64 |
#include "global.h" |
| 65 |
|
| 66 |
static unsigned int curtmp = 0; |
| 67 |
|
| 68 |
/***************************************************************************** |
| 69 |
* File related functions |
| 70 |
****************************************************************************/ |
| 71 |
|
| 72 |
/* |
| 73 |
* A replacement for the tempnam() function since it's not defined |
| 74 |
* at some unix variants. |
| 75 |
*/ |
| 76 |
|
| 77 |
char *tempnam_local(const char *dir, const char *pfx) |
| 78 |
{ |
| 79 |
char *name; |
| 80 |
pid_t pid=getpid(); |
| 81 |
|
| 82 |
/* HURD does not have a hard limit, but we do */ |
| 83 |
#ifndef MAXPATHLEN |
| 84 |
#define MAXPATHLEN 4096 |
| 85 |
#endif |
| 86 |
|
| 87 |
if (!(name = (char *) malloc(MAXPATHLEN))) |
| 88 |
return(NULL); |
| 89 |
|
| 90 |
if (!pfx) |
| 91 |
pfx = "cftmp."; |
| 92 |
|
| 93 |
/* This is a pretty simple method - put the pid as a hex digit and |
| 94 |
* just keep incrementing the last digit. Check to see if the file |
| 95 |
* already exists - if so, we'll just keep looking - eventually we should |
| 96 |
* find one that is free. |
| 97 |
*/ |
| 98 |
if (dir!=NULL) { |
| 99 |
do { |
| 100 |
#ifdef HAVE_SNPRINTF |
| 101 |
(void)snprintf(name, MAXPATHLEN, "%s/%s%hx.%d", dir, pfx, pid, curtmp); |
| 102 |
#else |
| 103 |
(void)sprintf(name,"%s/%s%hx%d", dir, pfx, pid, curtmp); |
| 104 |
#endif |
| 105 |
curtmp++; |
| 106 |
} while (access(name, F_OK)!=-1); |
| 107 |
return(name); |
| 108 |
} |
| 109 |
return(NULL); |
| 110 |
} |
| 111 |
|
| 112 |
|
| 113 |
|
| 114 |
/* This function removes everything in the directory. */ |
| 115 |
void remove_directory(const char *path) |
| 116 |
{ |
| 117 |
DIR *dirp; |
| 118 |
char buf[MAX_BUF]; |
| 119 |
struct stat statbuf; |
| 120 |
int status; |
| 121 |
|
| 122 |
if ((dirp=opendir(path))!=NULL) { |
| 123 |
struct dirent *de; |
| 124 |
|
| 125 |
for (de=readdir(dirp); de; de = readdir(dirp)) { |
| 126 |
/* Don't remove '.' or '..' In theory we should do a better |
| 127 |
* check for .., but the directories we are removing are fairly |
| 128 |
* limited and should not have dot files in them. |
| 129 |
*/ |
| 130 |
if (de->d_name[0] == '.') continue; |
| 131 |
|
| 132 |
/* Linux actually has a type field in the dirent structure, |
| 133 |
* but that is not portable - stat should be portable |
| 134 |
*/ |
| 135 |
status=stat(de->d_name, &statbuf); |
| 136 |
if ((status!=-1) && (S_ISDIR(statbuf.st_mode))) { |
| 137 |
sprintf(buf,"%s/%s", path, de->d_name); |
| 138 |
remove_directory(buf); |
| 139 |
continue; |
| 140 |
} |
| 141 |
sprintf(buf,"%s/%s", path, de->d_name); |
| 142 |
if (unlink(buf)) { |
| 143 |
LOG(llevError,"Unable to remove directory %s\n", path); |
| 144 |
} |
| 145 |
} |
| 146 |
closedir(dirp); |
| 147 |
} |
| 148 |
if (rmdir(path)) { |
| 149 |
LOG(llevError,"Unable to remove directory %s\n", path); |
| 150 |
} |
| 151 |
} |
| 152 |
|
| 153 |
#if defined(sgi) |
| 154 |
|
| 155 |
#include <stdio.h> |
| 156 |
#include <stdlib.h> |
| 157 |
#include <string.h> |
| 158 |
|
| 159 |
#define popen fixed_popen |
| 160 |
|
| 161 |
FILE *popen_local(const char *command, const char *type) |
| 162 |
{ |
| 163 |
int fd[2]; |
| 164 |
int pd; |
| 165 |
FILE *ret; |
| 166 |
if (!strcmp(type,"r")) |
| 167 |
{ |
| 168 |
pd=STDOUT_FILENO; |
| 169 |
} |
| 170 |
else if (!strcmp(type,"w")) |
| 171 |
{ |
| 172 |
pd=STDIN_FILENO; |
| 173 |
} |
| 174 |
else |
| 175 |
{ |
| 176 |
return NULL; |
| 177 |
} |
| 178 |
if (pipe(fd)!=-1) |
| 179 |
{ |
| 180 |
switch (fork()) |
| 181 |
{ |
| 182 |
case -1: |
| 183 |
close(fd[0]); |
| 184 |
close(fd[1]); |
| 185 |
break; |
| 186 |
case 0: |
| 187 |
close(fd[0]); |
| 188 |
if ((fd[1]==pd)||(dup2(fd[1],pd)==pd)) |
| 189 |
{ |
| 190 |
if (fd[1]!=pd) |
| 191 |
{ |
| 192 |
close(fd[1]); |
| 193 |
} |
| 194 |
execl("/bin/sh","sh","-c",command,NULL); |
| 195 |
close(pd); |
| 196 |
} |
| 197 |
exit(1); |
| 198 |
break; |
| 199 |
default: |
| 200 |
close(fd[1]); |
| 201 |
if (ret=fdopen(fd[0],type)) |
| 202 |
{ |
| 203 |
return ret; |
| 204 |
} |
| 205 |
close(fd[0]); |
| 206 |
break; |
| 207 |
} |
| 208 |
} |
| 209 |
return NULL; |
| 210 |
} |
| 211 |
|
| 212 |
#endif /* defined(sgi) */ |
| 213 |
|
| 214 |
|
| 215 |
/***************************************************************************** |
| 216 |
* String related function |
| 217 |
****************************************************************************/ |
| 218 |
|
| 219 |
|
| 220 |
|
| 221 |
/* |
| 222 |
* A replacement of strdup(), since it's not defined at some |
| 223 |
* unix variants. |
| 224 |
*/ |
| 225 |
char *strdup_local(const char *str) { |
| 226 |
char *c=(char *)malloc(sizeof(char)*(strlen(str)+1)); |
| 227 |
strcpy(c,str); |
| 228 |
return c; |
| 229 |
} |
| 230 |
|
| 231 |
|
| 232 |
#define DIGIT(x) (isdigit(x) ? (x) - '0' : \ |
| 233 |
islower (x) ? (x) + 10 - 'a' : (x) + 10 - 'A') |
| 234 |
#define MBASE ('z' - 'a' + 1 + 10) |
| 235 |
|
| 236 |
/* This seems to be lacking on some system */ |
| 237 |
#if !defined(HAVE_STRNCASECMP) |
| 238 |
int strncasecmp(const char *s1, const char *s2, int n) |
| 239 |
{ |
| 240 |
register int c1, c2; |
| 241 |
|
| 242 |
while (*s1 && *s2 && n) { |
| 243 |
c1 = tolower(*s1); |
| 244 |
c2 = tolower(*s2); |
| 245 |
if (c1 != c2) |
| 246 |
return (c1 - c2); |
| 247 |
s1++; |
| 248 |
s2++; |
| 249 |
n--; |
| 250 |
} |
| 251 |
if (!n) |
| 252 |
return(0); |
| 253 |
return (int) (*s1 - *s2); |
| 254 |
} |
| 255 |
#endif |
| 256 |
|
| 257 |
#if !defined(HAVE_STRCASECMP) |
| 258 |
int strcasecmp(const char *s1, const char*s2) |
| 259 |
{ |
| 260 |
register int c1, c2; |
| 261 |
|
| 262 |
while (*s1 && *s2) { |
| 263 |
c1 = tolower(*s1); |
| 264 |
c2 = tolower(*s2); |
| 265 |
if (c1 != c2) |
| 266 |
return (c1 - c2); |
| 267 |
s1++; |
| 268 |
s2++; |
| 269 |
} |
| 270 |
if (*s1=='\0' && *s2=='\0') |
| 271 |
return 0; |
| 272 |
return (int) (*s1 - *s2); |
| 273 |
} |
| 274 |
#endif |
| 275 |
|
| 276 |
char *strcasestr_local(const char *s, const char *find) |
| 277 |
{ |
| 278 |
char c, sc; |
| 279 |
size_t len; |
| 280 |
|
| 281 |
if ((c = *find++) != 0) { |
| 282 |
c = tolower(c); |
| 283 |
len = strlen(find); |
| 284 |
do { |
| 285 |
do { |
| 286 |
if ((sc = *s++) == 0) |
| 287 |
return NULL; |
| 288 |
} while (tolower(sc) != c); |
| 289 |
} while (strncasecmp(s, find, len) != 0); |
| 290 |
s--; |
| 291 |
} |
| 292 |
return (char *)s; |
| 293 |
} |
| 294 |
|
| 295 |
#if !defined(HAVE_SNPRINTF) |
| 296 |
|
| 297 |
int snprintf(char *dest, int max, const char *format, ...) |
| 298 |
{ |
| 299 |
va_list var; |
| 300 |
int ret; |
| 301 |
|
| 302 |
va_start(var, format); |
| 303 |
ret = vsprintf(dest, format, var); |
| 304 |
va_end(var); |
| 305 |
if (ret > max) abort(); |
| 306 |
|
| 307 |
return ret; |
| 308 |
} |
| 309 |
#endif |
| 310 |
|
| 311 |
|
| 312 |
/* |
| 313 |
* Based on (n+1)^2 = n^2 + 2n + 1 |
| 314 |
* given that 1^2 = 1, then |
| 315 |
* 2^2 = 1 + (2 + 1) = 1 + 3 = 4 |
| 316 |
* 3^2 = 4 + (4 + 1) = 4 + 5 = 1 + 3 + 5 = 9 |
| 317 |
* 4^2 = 9 + (6 + 1) = 9 + 7 = 1 + 3 + 5 + 7 = 16 |
| 318 |
* ... |
| 319 |
* In other words, a square number can be express as the sum of the |
| 320 |
* series n^2 = 1 + 3 + ... + (2n-1) |
| 321 |
*/ |
| 322 |
int |
| 323 |
isqrt(int n) |
| 324 |
{ |
| 325 |
int result, sum, prev; |
| 326 |
result = 0; |
| 327 |
prev = sum = 1; |
| 328 |
while (sum <= n) { |
| 329 |
prev += 2; |
| 330 |
sum += prev; |
| 331 |
++result; |
| 332 |
} |
| 333 |
return result; |
| 334 |
} |
| 335 |
|
| 336 |
|
| 337 |
/* |
| 338 |
* returns a char-pointer to a static array, in which a representation |
| 339 |
* of the decimal number given will be stored. |
| 340 |
*/ |
| 341 |
|
| 342 |
char *ltostr10(signed long n) { |
| 343 |
static char buf[12]; /* maximum size is n=-2 billion, i.e. 11 characters+1 |
| 344 |
character for the trailing nul character */ |
| 345 |
snprintf(buf, sizeof(buf), "%ld", n); |
| 346 |
return buf; |
| 347 |
} |
| 348 |
char *doubletostr10(double v){ |
| 349 |
static char tbuf[200]; |
| 350 |
sprintf(tbuf,"%f",v); |
| 351 |
return tbuf; |
| 352 |
} |
| 353 |
|
| 354 |
/** |
| 355 |
* Open and possibly uncompress a file. |
| 356 |
* |
| 357 |
* @param ext the extension if the file is compressed. |
| 358 |
* |
| 359 |
* @param uncompressor the command to uncompress the file if the file is |
| 360 |
* compressed. |
| 361 |
* |
| 362 |
* @param name the base file name without compression extension |
| 363 |
* |
| 364 |
* @param flag only used for compressed files: if set, uncompress and open the |
| 365 |
* file; if unset, uncompress the file via pipe |
| 366 |
* |
| 367 |
* @param *compressed set to zero if the file was uncompressed |
| 368 |
*/ |
| 369 |
static FILE *open_and_uncompress_file(const char *ext, const char *uncompressor, const char *name, int flag, int *compressed) { |
| 370 |
struct stat st; |
| 371 |
char buf[MAX_BUF]; |
| 372 |
char buf2[MAX_BUF]; |
| 373 |
int ret; |
| 374 |
|
| 375 |
if (ext == NULL) { |
| 376 |
ext = ""; |
| 377 |
} |
| 378 |
|
| 379 |
if (strlen(name)+strlen(ext) >= sizeof(buf)) { |
| 380 |
errno = ENAMETOOLONG; /* File name too long */ |
| 381 |
return NULL; |
| 382 |
} |
| 383 |
sprintf(buf, "%s%s", name, ext); |
| 384 |
|
| 385 |
if (stat(buf, &st) != 0) { |
| 386 |
return NULL; |
| 387 |
} |
| 388 |
|
| 389 |
if (!S_ISREG(st.st_mode)) { |
| 390 |
errno = EISDIR; /* Not a regular file */ |
| 391 |
return NULL; |
| 392 |
} |
| 393 |
|
| 394 |
if (uncompressor == NULL) { |
| 395 |
/* open without uncompression */ |
| 396 |
|
| 397 |
return fopen(buf, "r"); |
| 398 |
} |
| 399 |
|
| 400 |
/* The file name buf (and its substring name) is passed as an argument to a |
| 401 |
* shell command, therefore check for characters that could confuse the |
| 402 |
* shell. |
| 403 |
*/ |
| 404 |
if (strpbrk(buf, "'\\\r\n") != NULL) { |
| 405 |
errno = ENOENT; /* Pretend the file does not exist */ |
| 406 |
return NULL; |
| 407 |
} |
| 408 |
|
| 409 |
if (!flag) { |
| 410 |
/* uncompress via pipe */ |
| 411 |
|
| 412 |
if (strlen(uncompressor)+4+strlen(buf)+1 >= sizeof(buf2)) { |
| 413 |
errno = ENAMETOOLONG; /* File name too long */ |
| 414 |
return NULL; |
| 415 |
} |
| 416 |
sprintf(buf2, "%s < '%s'", uncompressor, buf); |
| 417 |
|
| 418 |
return popen(buf2, "r"); |
| 419 |
} |
| 420 |
|
| 421 |
/* remove compression from file, then open file */ |
| 422 |
|
| 423 |
if (stat(name, &st) == 0 && !S_ISREG(st.st_mode)) { |
| 424 |
errno = EISDIR; |
| 425 |
return NULL; |
| 426 |
} |
| 427 |
|
| 428 |
if (strlen(uncompressor)+4+strlen(buf)+5+strlen(name)+1 >= sizeof(buf2)) { |
| 429 |
errno = ENAMETOOLONG; /* File name too long */ |
| 430 |
return NULL; |
| 431 |
} |
| 432 |
sprintf(buf2, "%s < '%s' > '%s'", uncompressor, buf, name); |
| 433 |
|
| 434 |
ret = system(buf2); |
| 435 |
if (!WIFEXITED(ret) || WEXITSTATUS(ret) != 0) { |
| 436 |
LOG(llevError, "system(%s) returned %d\n", buf2, ret); |
| 437 |
errno = ENOENT; |
| 438 |
return NULL; |
| 439 |
} |
| 440 |
|
| 441 |
unlink(buf); /* Delete the original */ |
| 442 |
*compressed = 0; /* Change to "uncompressed file" */ |
| 443 |
chmod(name, st.st_mode); /* Copy access mode from compressed file */ |
| 444 |
|
| 445 |
return fopen(name, "r"); |
| 446 |
} |
| 447 |
|
| 448 |
/** |
| 449 |
* open_and_uncompress() first searches for the original filename. If it exist, |
| 450 |
* then it opens it and returns the file-pointer. |
| 451 |
* |
| 452 |
* If not, it does two things depending on the flag. If the flag is set, it |
| 453 |
* tries to create the original file by appending a compression suffix to name |
| 454 |
* and uncompressing it. If the flag is not set, it creates a pipe that is used |
| 455 |
* for reading the file (NOTE - you can not use fseek on pipes). |
| 456 |
* |
| 457 |
* The compressed pointer is set to nonzero if the file is compressed (and |
| 458 |
* thus, fp is actually a pipe.) It returns 0 if it is a normal file. |
| 459 |
*/ |
| 460 |
FILE *open_and_uncompress(const char *name, int flag, int *compressed) { |
| 461 |
size_t i; |
| 462 |
FILE *fp; |
| 463 |
|
| 464 |
fp = open_and_uncompress_file(0,0, name, flag, compressed); |
| 465 |
if (fp != NULL) { |
| 466 |
return fp; |
| 467 |
} |
| 468 |
|
| 469 |
errno = ENOENT; |
| 470 |
return NULL; |
| 471 |
} |
| 472 |
|
| 473 |
/* |
| 474 |
* See open_and_uncompress(). |
| 475 |
*/ |
| 476 |
|
| 477 |
void close_and_delete(FILE *fp, int compressed) { |
| 478 |
if (compressed) |
| 479 |
pclose(fp); |
| 480 |
else |
| 481 |
fclose(fp); |
| 482 |
} |
| 483 |
|
| 484 |
/* |
| 485 |
* If any directories in the given path doesn't exist, they are created. |
| 486 |
*/ |
| 487 |
|
| 488 |
void make_path_to_file (char *filename) |
| 489 |
{ |
| 490 |
char buf[MAX_BUF], *cp = buf; |
| 491 |
struct stat statbuf; |
| 492 |
|
| 493 |
if (!filename || !*filename) |
| 494 |
return; |
| 495 |
strcpy (buf, filename); |
| 496 |
|
| 497 |
while ((cp = strchr (cp + 1, (int) '/'))) { |
| 498 |
*cp = '\0'; |
| 499 |
if (stat(buf, &statbuf) || !S_ISDIR (statbuf.st_mode)) { |
| 500 |
if (mkdir (buf, SAVE_DIR_MODE)) { |
| 501 |
LOG(llevError, "Cannot mkdir %s: %s\n", buf, strerror(errno)); |
| 502 |
return; |
| 503 |
} |
| 504 |
} |
| 505 |
*cp = '/'; |
| 506 |
} |
| 507 |
} |
| 508 |
|
