1 |
/* |
2 |
* static char *rcsid_porting_c = |
3 |
* "$Id$"; |
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 |
/* This is a list of the suffix, uncompress and compress functions. Thus, |
69 |
* if you have some other compress program you want to use, the only thing |
70 |
* that needs to be done is to extended this. |
71 |
* The first entry must be NULL - this is what is used for non |
72 |
* compressed files. |
73 |
*/ |
74 |
EXTERN char *uncomp[NROF_COMPRESS_METHODS][3] = { |
75 |
{NULL, NULL, NULL}, |
76 |
{".Z", UNCOMPRESS, COMPRESS}, |
77 |
{".gz", GUNZIP, GZIP}, |
78 |
{".bz2", BUNZIP, BZIP} |
79 |
}; |
80 |
|
81 |
/***************************************************************************** |
82 |
* File related functions |
83 |
****************************************************************************/ |
84 |
|
85 |
/* |
86 |
* A replacement for the tempnam() function since it's not defined |
87 |
* at some unix variants. |
88 |
*/ |
89 |
|
90 |
char *tempnam_local(const char *dir, const char *pfx) |
91 |
{ |
92 |
char *name; |
93 |
pid_t pid=getpid(); |
94 |
|
95 |
/* HURD does not have a hard limit, but we do */ |
96 |
#ifndef MAXPATHLEN |
97 |
#define MAXPATHLEN 4096 |
98 |
#endif |
99 |
|
100 |
if (!(name = (char *) malloc(MAXPATHLEN))) |
101 |
return(NULL); |
102 |
|
103 |
if (!pfx) |
104 |
pfx = "cftmp."; |
105 |
|
106 |
/* This is a pretty simple method - put the pid as a hex digit and |
107 |
* just keep incrementing the last digit. Check to see if the file |
108 |
* already exists - if so, we'll just keep looking - eventually we should |
109 |
* find one that is free. |
110 |
*/ |
111 |
if (dir!=NULL) { |
112 |
do { |
113 |
#ifdef HAVE_SNPRINTF |
114 |
(void)snprintf(name, MAXPATHLEN, "%s/%s%hx.%d", dir, pfx, pid, curtmp); |
115 |
#else |
116 |
(void)sprintf(name,"%s/%s%hx%d", dir, pfx, pid, curtmp); |
117 |
#endif |
118 |
curtmp++; |
119 |
} while (access(name, F_OK)!=-1); |
120 |
return(name); |
121 |
} |
122 |
return(NULL); |
123 |
} |
124 |
|
125 |
|
126 |
|
127 |
/* This function removes everything in the directory. */ |
128 |
void remove_directory(const char *path) |
129 |
{ |
130 |
DIR *dirp; |
131 |
char buf[MAX_BUF]; |
132 |
struct stat statbuf; |
133 |
int status; |
134 |
|
135 |
if ((dirp=opendir(path))!=NULL) { |
136 |
struct dirent *de; |
137 |
|
138 |
for (de=readdir(dirp); de; de = readdir(dirp)) { |
139 |
/* Don't remove '.' or '..' In theory we should do a better |
140 |
* check for .., but the directories we are removing are fairly |
141 |
* limited and should not have dot files in them. |
142 |
*/ |
143 |
if (de->d_name[0] == '.') continue; |
144 |
|
145 |
/* Linux actually has a type field in the dirent structure, |
146 |
* but that is not portable - stat should be portable |
147 |
*/ |
148 |
status=stat(de->d_name, &statbuf); |
149 |
if ((status!=-1) && (S_ISDIR(statbuf.st_mode))) { |
150 |
sprintf(buf,"%s/%s", path, de->d_name); |
151 |
remove_directory(buf); |
152 |
continue; |
153 |
} |
154 |
sprintf(buf,"%s/%s", path, de->d_name); |
155 |
if (unlink(buf)) { |
156 |
LOG(llevError,"Unable to remove directory %s\n", path); |
157 |
} |
158 |
} |
159 |
closedir(dirp); |
160 |
} |
161 |
if (rmdir(path)) { |
162 |
LOG(llevError,"Unable to remove directory %s\n", path); |
163 |
} |
164 |
} |
165 |
|
166 |
#if defined(sgi) |
167 |
|
168 |
#include <stdio.h> |
169 |
#include <stdlib.h> |
170 |
#include <string.h> |
171 |
|
172 |
#define popen fixed_popen |
173 |
|
174 |
FILE *popen_local(const char *command, const char *type) |
175 |
{ |
176 |
int fd[2]; |
177 |
int pd; |
178 |
FILE *ret; |
179 |
if (!strcmp(type,"r")) |
180 |
{ |
181 |
pd=STDOUT_FILENO; |
182 |
} |
183 |
else if (!strcmp(type,"w")) |
184 |
{ |
185 |
pd=STDIN_FILENO; |
186 |
} |
187 |
else |
188 |
{ |
189 |
return NULL; |
190 |
} |
191 |
if (pipe(fd)!=-1) |
192 |
{ |
193 |
switch (fork()) |
194 |
{ |
195 |
case -1: |
196 |
close(fd[0]); |
197 |
close(fd[1]); |
198 |
break; |
199 |
case 0: |
200 |
close(fd[0]); |
201 |
if ((fd[1]==pd)||(dup2(fd[1],pd)==pd)) |
202 |
{ |
203 |
if (fd[1]!=pd) |
204 |
{ |
205 |
close(fd[1]); |
206 |
} |
207 |
execl("/bin/sh","sh","-c",command,NULL); |
208 |
close(pd); |
209 |
} |
210 |
exit(1); |
211 |
break; |
212 |
default: |
213 |
close(fd[1]); |
214 |
if (ret=fdopen(fd[0],type)) |
215 |
{ |
216 |
return ret; |
217 |
} |
218 |
close(fd[0]); |
219 |
break; |
220 |
} |
221 |
} |
222 |
return NULL; |
223 |
} |
224 |
|
225 |
#endif /* defined(sgi) */ |
226 |
|
227 |
|
228 |
/***************************************************************************** |
229 |
* String related function |
230 |
****************************************************************************/ |
231 |
|
232 |
|
233 |
|
234 |
/* |
235 |
* A replacement of strdup(), since it's not defined at some |
236 |
* unix variants. |
237 |
*/ |
238 |
char *strdup_local(const char *str) { |
239 |
char *c=(char *)malloc(sizeof(char)*(strlen(str)+1)); |
240 |
strcpy(c,str); |
241 |
return c; |
242 |
} |
243 |
|
244 |
|
245 |
#define DIGIT(x) (isdigit(x) ? (x) - '0' : \ |
246 |
islower (x) ? (x) + 10 - 'a' : (x) + 10 - 'A') |
247 |
#define MBASE ('z' - 'a' + 1 + 10) |
248 |
|
249 |
/* This seems to be lacking on some system */ |
250 |
#if !defined(HAVE_STRNCASECMP) |
251 |
int strncasecmp(const char *s1, const char *s2, int n) |
252 |
{ |
253 |
register int c1, c2; |
254 |
|
255 |
while (*s1 && *s2 && n) { |
256 |
c1 = tolower(*s1); |
257 |
c2 = tolower(*s2); |
258 |
if (c1 != c2) |
259 |
return (c1 - c2); |
260 |
s1++; |
261 |
s2++; |
262 |
n--; |
263 |
} |
264 |
if (!n) |
265 |
return(0); |
266 |
return (int) (*s1 - *s2); |
267 |
} |
268 |
#endif |
269 |
|
270 |
#if !defined(HAVE_STRCASECMP) |
271 |
int strcasecmp(const char *s1, const char*s2) |
272 |
{ |
273 |
register int c1, c2; |
274 |
|
275 |
while (*s1 && *s2) { |
276 |
c1 = tolower(*s1); |
277 |
c2 = tolower(*s2); |
278 |
if (c1 != c2) |
279 |
return (c1 - c2); |
280 |
s1++; |
281 |
s2++; |
282 |
} |
283 |
if (*s1=='\0' && *s2=='\0') |
284 |
return 0; |
285 |
return (int) (*s1 - *s2); |
286 |
} |
287 |
#endif |
288 |
|
289 |
char *strcasestr_local(const char *s, const char *find) |
290 |
{ |
291 |
char c, sc; |
292 |
size_t len; |
293 |
|
294 |
if ((c = *find++) != 0) { |
295 |
c = tolower(c); |
296 |
len = strlen(find); |
297 |
do { |
298 |
do { |
299 |
if ((sc = *s++) == 0) |
300 |
return NULL; |
301 |
} while (tolower(sc) != c); |
302 |
} while (strncasecmp(s, find, len) != 0); |
303 |
s--; |
304 |
} |
305 |
return (char *)s; |
306 |
} |
307 |
|
308 |
#if !defined(HAVE_SNPRINTF) |
309 |
|
310 |
int snprintf(char *dest, int max, const char *format, ...) |
311 |
{ |
312 |
va_list var; |
313 |
int ret; |
314 |
|
315 |
va_start(var, format); |
316 |
ret = vsprintf(dest, format, var); |
317 |
va_end(var); |
318 |
if (ret > max) abort(); |
319 |
|
320 |
return ret; |
321 |
} |
322 |
#endif |
323 |
|
324 |
|
325 |
/* This takes an err number and returns a string with a description of |
326 |
* the error. |
327 |
*/ |
328 |
char *strerror_local(int errnum) |
329 |
{ |
330 |
#if defined(HAVE_STRERROR) |
331 |
return(strerror(errnum)); |
332 |
#else |
333 |
return("strerror_local not implemented"); |
334 |
#endif |
335 |
} |
336 |
|
337 |
/* |
338 |
* Based on (n+1)^2 = n^2 + 2n + 1 |
339 |
* given that 1^2 = 1, then |
340 |
* 2^2 = 1 + (2 + 1) = 1 + 3 = 4 |
341 |
* 3^2 = 4 + (4 + 1) = 4 + 5 = 1 + 3 + 5 = 9 |
342 |
* 4^2 = 9 + (6 + 1) = 9 + 7 = 1 + 3 + 5 + 7 = 16 |
343 |
* ... |
344 |
* In other words, a square number can be express as the sum of the |
345 |
* series n^2 = 1 + 3 + ... + (2n-1) |
346 |
*/ |
347 |
int |
348 |
isqrt(int n) |
349 |
{ |
350 |
int result, sum, prev; |
351 |
result = 0; |
352 |
prev = sum = 1; |
353 |
while (sum <= n) { |
354 |
prev += 2; |
355 |
sum += prev; |
356 |
++result; |
357 |
} |
358 |
return result; |
359 |
} |
360 |
|
361 |
|
362 |
/* |
363 |
* returns a char-pointer to a static array, in which a representation |
364 |
* of the decimal number given will be stored. |
365 |
*/ |
366 |
|
367 |
char *ltostr10(signed long n) { |
368 |
static char buf[12]; /* maximum size is n=-2 billion, i.e. 11 characters+1 |
369 |
character for the trailing nul character */ |
370 |
snprintf(buf, sizeof(buf), "%ld", n); |
371 |
return buf; |
372 |
} |
373 |
char *doubletostr10(double v){ |
374 |
static char tbuf[200]; |
375 |
sprintf(tbuf,"%f",v); |
376 |
return tbuf; |
377 |
} |
378 |
|
379 |
/* |
380 |
* A fast routine which appends the name and decimal number specified |
381 |
* to the given buffer. |
382 |
* Could be faster, though, if the strcat()s at the end could be changed |
383 |
* into alternate strcat which returned a pointer to the _end_, not the |
384 |
* start! |
385 |
* |
386 |
* Hey good news, it IS faster now, according to changes in get_ob_diff |
387 |
* Completly redone prototype and made define in loader.l. See changes there. |
388 |
* Didn't touch those for speed reason (don't use them anymore) . |
389 |
* Tchize |
390 |
*/ |
391 |
|
392 |
void save_long(char *buf, char *name, long n) { |
393 |
char buf2[MAX_BUF]; |
394 |
strcpy(buf2,name); |
395 |
strcat(buf2," "); |
396 |
strcat(buf2,ltostr10(n)); |
397 |
strcat(buf2,"\n"); |
398 |
strcat(buf,buf2); |
399 |
} |
400 |
|
401 |
|
402 |
|
403 |
void save_long_long(char *buf, char *name, sint64 n) { |
404 |
char buf2[MAX_BUF]; |
405 |
|
406 |
#ifndef WIN32 |
407 |
sprintf(buf2,"%s %lld\n", name, n); |
408 |
#else |
409 |
sprintf(buf2,"%s %I64d\n", name, n); |
410 |
#endif |
411 |
strcat(buf,buf2); |
412 |
} |
413 |
|
414 |
/** |
415 |
* Open and possibly uncompress a file. |
416 |
* |
417 |
* @param ext the extension if the file is compressed. |
418 |
* |
419 |
* @param uncompressor the command to uncompress the file if the file is |
420 |
* compressed. |
421 |
* |
422 |
* @param name the base file name without compression extension |
423 |
* |
424 |
* @param flag only used for compressed files: if set, uncompress and open the |
425 |
* file; if unset, uncompress the file via pipe |
426 |
* |
427 |
* @param *compressed set to zero if the file was uncompressed |
428 |
*/ |
429 |
static FILE *open_and_uncompress_file(const char *ext, const char *uncompressor, const char *name, int flag, int *compressed) { |
430 |
struct stat st; |
431 |
char buf[MAX_BUF]; |
432 |
char buf2[MAX_BUF]; |
433 |
int ret; |
434 |
|
435 |
if (ext == NULL) { |
436 |
ext = ""; |
437 |
} |
438 |
|
439 |
if (strlen(name)+strlen(ext) >= sizeof(buf)) { |
440 |
errno = ENAMETOOLONG; /* File name too long */ |
441 |
return NULL; |
442 |
} |
443 |
sprintf(buf, "%s%s", name, ext); |
444 |
|
445 |
if (stat(buf, &st) != 0) { |
446 |
return NULL; |
447 |
} |
448 |
|
449 |
if (!S_ISREG(st.st_mode)) { |
450 |
errno = EISDIR; /* Not a regular file */ |
451 |
return NULL; |
452 |
} |
453 |
|
454 |
if (uncompressor == NULL) { |
455 |
/* open without uncompression */ |
456 |
|
457 |
return fopen(buf, "r"); |
458 |
} |
459 |
|
460 |
/* The file name buf (and its substring name) is passed as an argument to a |
461 |
* shell command, therefore check for characters that could confuse the |
462 |
* shell. |
463 |
*/ |
464 |
if (strpbrk(buf, "'\\\r\n") != NULL) { |
465 |
errno = ENOENT; /* Pretend the file does not exist */ |
466 |
return NULL; |
467 |
} |
468 |
|
469 |
if (!flag) { |
470 |
/* uncompress via pipe */ |
471 |
|
472 |
if (strlen(uncompressor)+4+strlen(buf)+1 >= sizeof(buf2)) { |
473 |
errno = ENAMETOOLONG; /* File name too long */ |
474 |
return NULL; |
475 |
} |
476 |
sprintf(buf2, "%s < '%s'", uncompressor, buf); |
477 |
|
478 |
return popen(buf2, "r"); |
479 |
} |
480 |
|
481 |
/* remove compression from file, then open file */ |
482 |
|
483 |
if (stat(name, &st) == 0 && !S_ISREG(st.st_mode)) { |
484 |
errno = EISDIR; |
485 |
return NULL; |
486 |
} |
487 |
|
488 |
if (strlen(uncompressor)+4+strlen(buf)+5+strlen(name)+1 >= sizeof(buf2)) { |
489 |
errno = ENAMETOOLONG; /* File name too long */ |
490 |
return NULL; |
491 |
} |
492 |
sprintf(buf2, "%s < '%s' > '%s'", uncompressor, buf, name); |
493 |
|
494 |
ret = system(buf2); |
495 |
if (!WIFEXITED(ret) || WEXITSTATUS(ret) != 0) { |
496 |
LOG(llevError, "system(%s) returned %d\n", buf2, ret); |
497 |
errno = ENOENT; |
498 |
return NULL; |
499 |
} |
500 |
|
501 |
unlink(buf); /* Delete the original */ |
502 |
*compressed = 0; /* Change to "uncompressed file" */ |
503 |
chmod(name, st.st_mode); /* Copy access mode from compressed file */ |
504 |
|
505 |
return fopen(name, "r"); |
506 |
} |
507 |
|
508 |
/** |
509 |
* open_and_uncompress() first searches for the original filename. If it exist, |
510 |
* then it opens it and returns the file-pointer. |
511 |
* |
512 |
* If not, it does two things depending on the flag. If the flag is set, it |
513 |
* tries to create the original file by appending a compression suffix to name |
514 |
* and uncompressing it. If the flag is not set, it creates a pipe that is used |
515 |
* for reading the file (NOTE - you can not use fseek on pipes). |
516 |
* |
517 |
* The compressed pointer is set to nonzero if the file is compressed (and |
518 |
* thus, fp is actually a pipe.) It returns 0 if it is a normal file. |
519 |
*/ |
520 |
FILE *open_and_uncompress(const char *name, int flag, int *compressed) { |
521 |
size_t i; |
522 |
FILE *fp; |
523 |
|
524 |
for (i = 0; i < NROF_COMPRESS_METHODS; i++) { |
525 |
*compressed = i; |
526 |
fp = open_and_uncompress_file(uncomp[i][0], uncomp[i][1], name, flag, compressed); |
527 |
if (fp != NULL) { |
528 |
return fp; |
529 |
} |
530 |
} |
531 |
|
532 |
errno = ENOENT; |
533 |
return NULL; |
534 |
} |
535 |
|
536 |
/* |
537 |
* See open_and_uncompress(). |
538 |
*/ |
539 |
|
540 |
void close_and_delete(FILE *fp, int compressed) { |
541 |
if (compressed) |
542 |
pclose(fp); |
543 |
else |
544 |
fclose(fp); |
545 |
} |
546 |
|
547 |
/* |
548 |
* If any directories in the given path doesn't exist, they are created. |
549 |
*/ |
550 |
|
551 |
void make_path_to_file (char *filename) |
552 |
{ |
553 |
char buf[MAX_BUF], *cp = buf; |
554 |
struct stat statbuf; |
555 |
|
556 |
if (!filename || !*filename) |
557 |
return; |
558 |
strcpy (buf, filename); |
559 |
|
560 |
while ((cp = strchr (cp + 1, (int) '/'))) { |
561 |
*cp = '\0'; |
562 |
if (stat(buf, &statbuf) || !S_ISDIR (statbuf.st_mode)) { |
563 |
if (mkdir (buf, SAVE_DIR_MODE)) { |
564 |
LOG(llevError, "Cannot mkdir %s: %s\n", buf, strerror_local(errno)); |
565 |
return; |
566 |
} |
567 |
} |
568 |
*cp = '/'; |
569 |
} |
570 |
} |
571 |
|