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2986a63f JH |
1 | |
2 | /* | |
3 | * Copyright © 2001 Novell, Inc. All Rights Reserved. | |
4 | * | |
5 | * You may distribute under the terms of either the GNU General Public | |
6 | * License or the Artistic License, as specified in the README file. | |
7 | * | |
8 | */ | |
9 | ||
10 | /* | |
11 | * FILENAME : NWUtil.c | |
12 | * DESCRIPTION : Utility functions for NetWare implementation of Perl. | |
13 | * Author : HYAK | |
14 | * Date : Januray 2001. | |
15 | * | |
16 | */ | |
17 | ||
18 | ||
19 | ||
20 | #include "stdio.h" | |
21 | #include "string.h" | |
22 | ||
23 | #include <nwdsdefs.h> // For "MAX_DN_BYTES" | |
24 | #include <malloc.h> // For "malloc" and "free" | |
25 | #include <stdlib.h> // For "getenv" | |
26 | #include <ctype.h> // For "isspace" | |
27 | ||
28 | #include <process.h> | |
29 | #include <unistd.h> | |
30 | #include <errno.h> | |
31 | #include <nwerrno.h> | |
32 | ||
33 | #include <nwlocale.h> | |
34 | #include <nwadv.h> | |
35 | ||
36 | #include "nwutil.h" | |
37 | ||
38 | ||
39 | #define TRUE 1 | |
40 | #define FALSE 0 | |
41 | ||
42 | ||
43 | /** | |
44 | Global variables used for better token parsing. When these were absent, | |
45 | token parsing was not correct when there were more number of arguments passed. | |
46 | These are used in fnCommandLineParser, fnSkipToken and fnScanToken to get/return | |
47 | the correct and updated pointer to the command line string. | |
48 | **/ | |
49 | char *s1 = NULL; // Used in fnScanToken. | |
50 | char *s2 = NULL; // Used in fnSkipToken. | |
51 | ||
52 | ||
53 | ||
54 | ||
55 | /*============================================================================================ | |
56 | ||
57 | Function : fnSkipWhite | |
58 | ||
59 | Description : This function skips the white space characters in the given string and | |
60 | returns the resultant value. | |
61 | ||
62 | Parameters : s (IN) - Input string. | |
63 | ||
64 | Returns : String. | |
65 | ||
66 | ==============================================================================================*/ | |
67 | ||
68 | char *fnSkipWhite(char *s) | |
69 | { | |
70 | while (isspace(*s)) | |
71 | s++; | |
72 | return s; | |
73 | } | |
74 | ||
75 | ||
76 | ||
77 | /*============================================================================================ | |
78 | ||
79 | Function : fnNwGetEnvironmentStr | |
80 | ||
81 | Description : This function returns the NetWare environment string if available, | |
82 | otherwise returns the supplied default value | |
83 | ||
84 | Parameters : name (IN) - To hold the NetWare environment value. | |
85 | defaultvalue (IN) - Default value. | |
86 | ||
87 | ||
88 | Returns : String. | |
89 | ||
90 | ==============================================================================================*/ | |
91 | ||
92 | char *fnNwGetEnvironmentStr(char *name, char *defaultvalue) | |
93 | { | |
94 | char* ret = getenv(name); | |
95 | if (ret == NULL) | |
96 | ret = defaultvalue; | |
97 | return ret; | |
98 | } | |
99 | ||
100 | ||
101 | ||
102 | /*============================================================================================ | |
103 | ||
104 | Function : fnCommandLineParser | |
105 | ||
106 | Description : This function parses the command line into argc/argv style of | |
107 | Number of params and array of params. | |
108 | ||
109 | Parameters : pclp (IN) - CommandLine structure. | |
110 | commandLine (IN) - CommandLine String. | |
111 | preserverQuotes (IN) - Indicates whether to preserve/copy the quotes or not. | |
112 | ||
113 | Returns : Nothing. | |
114 | ||
115 | ==============================================================================================*/ | |
116 | ||
117 | void fnCommandLineParser(PCOMMANDLINEPARSER pclp, char * commandLine, BOOL preserveQuotes) | |
118 | { | |
119 | char *buffer = NULL; | |
120 | ||
121 | int index = 0; | |
122 | int do_delete = 1; | |
123 | int i=0, j=0, k=0; | |
124 | ||
125 | ||
126 | // +1 makes room for the terminating NULL | |
127 | buffer = (char *) malloc((strlen(commandLine) + 1) * sizeof(char)); | |
128 | if (buffer == NULL) | |
129 | { | |
130 | pclp->m_isValid = FALSE; | |
131 | return; | |
132 | } | |
133 | ||
134 | if (preserveQuotes) | |
135 | { | |
136 | // No I/O redirection nor quote processing if preserveQuotes | |
137 | ||
138 | char *s = NULL; | |
139 | char *sSkippedToken = NULL; | |
140 | ||
141 | ||
142 | strcpy(buffer, commandLine); | |
143 | s = buffer; | |
144 | s = fnSkipWhite(s); // Skip white spaces. | |
145 | ||
146 | s2 = s; // Update the global pointer. | |
147 | ||
148 | ||
149 | pclp->sSkippedToken = (char *) malloc(MAX_DN_BYTES * sizeof(char)); | |
150 | if(pclp->sSkippedToken == NULL) | |
151 | { | |
152 | pclp->m_isValid = FALSE; | |
153 | return; | |
154 | } | |
155 | ||
156 | while (*s && pclp->m_isValid) | |
157 | { | |
158 | /**** | |
159 | // Commented since only one time malloc and free is enough as is done outside this while loop. | |
160 | // It is not required to do them everytime the execution comes into this while loop. | |
161 | // Still retained here. Remove this once things are proved to be working fine to a good confident level, | |
162 | ||
163 | if(pclp->sSkippedToken) | |
164 | { | |
165 | free(pclp->sSkippedToken); | |
166 | pclp->sSkippedToken = NULL; | |
167 | } | |
168 | ||
169 | if(pclp->sSkippedToken == NULL) | |
170 | { | |
171 | pclp->sSkippedToken = (char *) malloc(MAX_DN_BYTES * sizeof(char)); | |
172 | if(pclp->sSkippedToken == NULL) | |
173 | { | |
174 | pclp->m_isValid = FALSE; | |
175 | return; | |
176 | } | |
177 | } | |
178 | ****/ | |
179 | ||
180 | // Empty the string. | |
181 | strncpy(pclp->sSkippedToken, "", (MAX_DN_BYTES * sizeof(char))); | |
182 | ||
183 | // s is advanced by fnSkipToken | |
184 | pclp->sSkippedToken = fnSkipToken(s, pclp->sSkippedToken); // Collect the next command-line argument. | |
185 | ||
186 | s2 = fnSkipWhite(s2); // s2 is already updated by fnSkipToken. | |
187 | s = s2; // Update the local pointer too. | |
188 | ||
189 | fnAppendArgument(pclp, pclp->sSkippedToken); // Append the argument into an array. | |
190 | } | |
191 | ||
192 | if(pclp->sSkippedToken) | |
193 | { | |
194 | free(pclp->sSkippedToken); | |
195 | pclp->sSkippedToken = NULL; | |
196 | } | |
197 | } | |
198 | else | |
199 | { | |
200 | char *s = NULL; | |
201 | ||
202 | strcpy(buffer, commandLine); | |
203 | s = buffer; | |
204 | s = fnSkipWhite(s); | |
205 | ||
206 | s1 = s; // Update the global pointer. | |
207 | ||
208 | while (*s && pclp->m_isValid) | |
209 | { | |
210 | // s is advanced by fnScanToken | |
211 | // Check for I/O redirection here, *outside* of | |
212 | // fnScanToken(), so that quote-protected angle | |
213 | // brackets do NOT cause redirection. | |
214 | if (*s == '<') | |
215 | { | |
216 | s = fnSkipWhite(s+1); // get stdin redirection | |
217 | ||
218 | if(pclp->m_redirInName) | |
219 | { | |
220 | free(pclp->m_redirInName); | |
221 | pclp->m_redirInName = NULL; | |
222 | } | |
223 | ||
224 | if(pclp->m_redirInName == NULL) | |
225 | { | |
226 | pclp->m_redirInName = (char *) malloc(MAX_DN_BYTES * sizeof(char)); | |
227 | if(pclp->m_redirInName == NULL) | |
228 | { | |
229 | pclp->m_isValid = FALSE; | |
230 | return; | |
231 | } | |
232 | } | |
233 | ||
234 | // Collect the next command-line argument. | |
235 | pclp->m_redirInName = fnScanToken(s, pclp->m_redirInName); | |
236 | ||
237 | s1 = fnSkipWhite(s1); // s1 is already updated by fnScanToken. | |
238 | s = s1; // Update the local pointer too. | |
239 | } | |
240 | else if (*s == '>') | |
241 | { | |
242 | s = fnSkipWhite(s+1); //get stdout redirection | |
243 | ||
244 | if(pclp->m_redirOutName) | |
245 | { | |
246 | free(pclp->m_redirOutName); | |
247 | pclp->m_redirOutName = NULL; | |
248 | } | |
249 | ||
250 | if(pclp->m_redirOutName == NULL) | |
251 | { | |
252 | pclp->m_redirOutName = (char *) malloc(MAX_DN_BYTES * sizeof(char)); | |
253 | if(pclp->m_redirOutName == NULL) | |
254 | { | |
255 | pclp->m_isValid = FALSE; | |
256 | return; | |
257 | } | |
258 | } | |
259 | ||
260 | // Collect the next command-line argument. | |
261 | pclp->m_redirOutName = fnScanToken(s, pclp->m_redirOutName); | |
262 | ||
263 | s1 = fnSkipWhite(s1); // s1 is already updated by fnScanToken. | |
264 | s = s1; // Update the local pointer too. | |
265 | } | |
266 | else if (*s == '2' && s[1] == '>') | |
267 | { | |
268 | s = fnSkipWhite(s+2); // get stderr redirection | |
269 | ||
270 | if(pclp->m_redirErrName) | |
271 | { | |
272 | free(pclp->m_redirErrName); | |
273 | pclp->m_redirErrName = NULL; | |
274 | } | |
275 | ||
276 | if(pclp->m_redirErrName == NULL) | |
277 | { | |
278 | pclp->m_redirErrName = (char *) malloc(MAX_DN_BYTES * sizeof(char)); | |
279 | if(pclp->m_redirErrName == NULL) | |
280 | { | |
281 | pclp->m_isValid = FALSE; | |
282 | return; | |
283 | } | |
284 | } | |
285 | ||
286 | // Collect the next command-line argument. | |
287 | pclp->m_redirErrName = fnScanToken(s, pclp->m_redirErrName); | |
288 | ||
289 | s1 = fnSkipWhite(s1); // s1 is already updated by fnScanToken. | |
290 | s = s1; // Update the local pointer too. | |
291 | } | |
292 | else if (*s == '&' && s[1] == '>') | |
293 | { | |
294 | s = fnSkipWhite(s+2); // get stdout+stderr redirection | |
295 | ||
296 | if(pclp->m_redirBothName) | |
297 | { | |
298 | free(pclp->m_redirBothName); | |
299 | pclp->m_redirBothName = NULL; | |
300 | } | |
301 | ||
302 | if(pclp->m_redirBothName == NULL) | |
303 | { | |
304 | pclp->m_redirBothName = (char *) malloc(MAX_DN_BYTES * sizeof(char)); | |
305 | if(pclp->m_redirBothName == NULL) | |
306 | { | |
307 | pclp->m_isValid = FALSE; | |
308 | return; | |
309 | } | |
310 | } | |
311 | ||
312 | // Collect the next command-line argument. | |
313 | pclp->m_redirBothName = fnScanToken(s, pclp->m_redirBothName); | |
314 | ||
315 | s1 = fnSkipWhite(s1); // s1 is already updated by fnScanToken. | |
316 | s = s1; // Update the local pointer too. | |
317 | } | |
318 | else | |
319 | { | |
320 | if(pclp->nextarg) | |
321 | { | |
322 | free(pclp->nextarg); | |
323 | pclp->nextarg = NULL; | |
324 | } | |
325 | ||
326 | if(pclp->nextarg == NULL) | |
327 | { | |
328 | pclp->nextarg = (char *) malloc(MAX_DN_BYTES * sizeof(char)); | |
329 | if(pclp->nextarg == NULL) | |
330 | { | |
331 | pclp->m_isValid = FALSE; | |
332 | return; | |
333 | } | |
334 | } | |
335 | ||
336 | // Collect the next command-line argument. | |
337 | pclp->nextarg = fnScanToken(s, pclp->nextarg); | |
338 | ||
339 | s1 = fnSkipWhite(s1); // s1 is already updated by fnScanToken. | |
340 | s = s1; // Update the local pointer too. | |
341 | ||
342 | // Append the next command-line argument into an array. | |
343 | fnAppendArgument(pclp, pclp->nextarg); | |
344 | } | |
345 | } | |
346 | } | |
347 | ||
348 | ||
349 | // The -{ option, the --noscreen option, the --autodestroy option, if present, | |
350 | // are processed now and removed from the argument vector. | |
351 | for(index=0; index < pclp->m_argc; ) | |
352 | { | |
353 | // "-q" is replaced by "-{", because of clash with GetOpt - sgp - 7th Nov 2000 | |
354 | // Copied from NDK build - Jan 5th 2001 | |
355 | if (strncmp(pclp->m_argv[index], (char *)"-{", 2) == 0) | |
356 | { | |
357 | // found a -q option; grab the semaphore number | |
358 | sscanf(pclp->m_argv[index], (char *)"-{%x", &pclp->m_qSemaphore); | |
359 | fnDeleteArgument(pclp, index); // Delete the argument from the list. | |
360 | } | |
361 | else if (strcmp(pclp->m_argv[index], (char *)"--noscreen") == 0) | |
362 | { | |
363 | // found a --noscreen option | |
364 | pclp->m_noScreen = 1; | |
365 | fnDeleteArgument(pclp, index); | |
366 | } | |
367 | else if (strcmp(pclp->m_argv[index], (char *)"--autodestroy") == 0) | |
368 | { | |
369 | // found a --autodestroy option - create a screen but close automatically | |
370 | pclp->m_AutoDestroy = 1; | |
371 | fnDeleteArgument(pclp, index); | |
372 | } | |
373 | else | |
374 | index++; | |
375 | } | |
376 | ||
377 | // pclp->m_isValid is TRUE if there are more than 2 command line parameters OR | |
378 | // if there is only one command and if it is the comman PERL. | |
379 | pclp->m_isValid = ((pclp->m_argc >= 2) || ((pclp->m_argc > 0) && (stricmp(pclp->m_argv[0], LOAD_COMMAND) != 0))); | |
380 | ||
381 | if(buffer) | |
382 | { | |
383 | free(buffer); | |
384 | buffer = NULL; | |
385 | } | |
386 | ||
387 | return; | |
388 | } | |
389 | ||
390 | ||
391 | ||
392 | /*============================================================================================ | |
393 | ||
394 | Function : fnAppendArgument | |
395 | ||
396 | Description : This function appends the arguments into a list. | |
397 | ||
398 | Parameters : pclp (IN) - CommandLine structure. | |
399 | new_arg (IN) - The new argument to be appended. | |
400 | ||
401 | Returns : Nothing. | |
402 | ||
403 | ==============================================================================================*/ | |
404 | ||
405 | void fnAppendArgument(PCOMMANDLINEPARSER pclp, char *new_arg) | |
406 | { | |
407 | char **new_argv = pclp->new_argv; | |
408 | ||
409 | int new_argv_len = pclp->m_argv_len*2; | |
410 | int i = 0, j = 0; | |
411 | ||
412 | ||
413 | // Lengthen the argument vector if there's not room for another. | |
414 | // Testing for 'm_argc+2' rather than 'm_argc+1' in the test guarantees | |
415 | // that there'll always be a NULL terminator at the end of argv. | |
416 | if ((pclp->m_argc + 2) > pclp->m_argv_len) | |
417 | { | |
418 | new_argv = (char **) malloc(new_argv_len * sizeof(char*)); // get a longer arg-vector | |
419 | if (new_argv == NULL) | |
420 | { | |
421 | pclp->m_isValid = FALSE; | |
422 | return; | |
423 | } | |
424 | for(i=0; i<new_argv_len; i++) | |
425 | { | |
426 | new_argv[i] = (char *) malloc(MAX_DN_BYTES * sizeof(char)); | |
427 | if (new_argv[i] == NULL) | |
428 | { | |
429 | for(j=0; j<i; j++) | |
430 | { | |
431 | if(new_argv[j]) | |
432 | { | |
433 | free(new_argv[j]); | |
434 | new_argv[j] = NULL; | |
435 | } | |
436 | } | |
437 | if(new_argv) | |
438 | { | |
439 | free(new_argv); | |
440 | new_argv = NULL; | |
441 | } | |
442 | ||
443 | pclp->m_isValid = FALSE; | |
444 | return; | |
445 | } | |
446 | } | |
447 | ||
448 | for (i=0; i<pclp->m_argc; i++) | |
449 | strcpy(new_argv[i], pclp->m_argv[i]); // copy old arg strings | |
450 | ||
451 | for(i=0; i<(pclp->m_argv_len); i++) | |
452 | { | |
453 | if(pclp->m_argv[i]) | |
454 | { | |
455 | free(pclp->m_argv[i]); | |
456 | pclp->m_argv[i] = NULL; | |
457 | } | |
458 | } | |
459 | if (pclp->m_argv != NULL) | |
460 | { | |
461 | free(pclp->m_argv); | |
462 | pclp->m_argv = NULL; | |
463 | } | |
464 | ||
465 | ||
466 | pclp->m_argv = new_argv; | |
467 | pclp->m_argv_len = new_argv_len; | |
468 | ||
469 | } | |
470 | ||
471 | // Once m_argv is guaranteed long enough, appending the argument is a direct job. | |
472 | strcpy(pclp->m_argv[pclp->m_argc], new_arg); // Appended the new argument. | |
473 | pclp->m_argc++; // Increment the number of parameters appended. | |
474 | ||
cf267c36 JH |
475 | // The char array is emptied for all elements upto the end so that there are no |
476 | // junk characters. If this is not done, then the issue is like this: | |
2986a63f | 477 | // - Simple perl command like "perl" on the system console works fine for the first time. |
cf267c36 JH |
478 | // - When "perl" is executed the second time, a new blank screen should come up |
479 | // which allows for editing also. This was not consistently working well. | |
480 | // More so when the command was like, "perl ", that is the name "perl" followed | |
481 | // by a few blank spaces, it used to give error in opening file: | |
482 | // "unable to open the file" since the filename would have some junk characters. | |
483 | // | |
484 | // These issues are fixed through the code below. | |
2986a63f JH |
485 | for(i=pclp->m_argc; i<pclp->m_argv_len; i++) |
486 | strncpy(pclp->m_argv[i], "", (MAX_DN_BYTES * sizeof(char))); // MAX_DN_BYTES is the size of pclp->m_argv[]. | |
487 | ||
488 | ||
489 | // Fix for empty command line double quote abend - perl <.pl> "" | |
490 | if ((new_arg==NULL) || ((strlen(new_arg))<=0)) | |
491 | { | |
492 | pclp->m_argc--; // Decrement the number of parameters appended. | |
493 | pclp->m_isValid = FALSE; | |
494 | return; | |
495 | } | |
496 | ||
497 | ||
498 | return; | |
499 | } | |
500 | ||
501 | ||
502 | ||
503 | /*============================================================================================ | |
504 | ||
505 | Function : fnSkipToken | |
506 | ||
507 | Description : This function collects the next command-line argument, breaking on | |
508 | unquoted white space. The quote symbols are copied into the output. | |
509 | White space has already been skipped. | |
510 | ||
511 | Parameters : s (IN) - Input string in which the token is skipped. | |
512 | r (IN) - The resultant return string. | |
513 | ||
514 | Returns : String. | |
515 | ||
516 | ==============================================================================================*/ | |
517 | ||
518 | char *fnSkipToken(char *s, char *r) | |
519 | { | |
520 | register char *t=NULL; | |
521 | register char quote = '\0'; // NULL, single quote, or double quote | |
522 | char ch = '\0'; | |
523 | ||
524 | for (t=s; t[0]; t++) | |
525 | { | |
526 | ch = t[0]; | |
527 | if (!quote) | |
528 | { | |
529 | if (isspace(ch)) // if unquoted whitespace... | |
530 | { | |
531 | break; // ...end of token found | |
532 | } | |
533 | else if (ch=='"' || ch=='\'') // if opening quote... | |
534 | { | |
535 | quote = ch; // ...enter quote mode | |
536 | } | |
537 | } | |
538 | else | |
539 | { | |
540 | if (ch=='\\' && t[1]==quote) // if escaped quote... | |
541 | { | |
542 | t++; // ...skip backslash | |
543 | } | |
544 | else if (ch==quote) // if close quote... | |
545 | { | |
546 | quote = 0; // ...leave quote mode | |
547 | } | |
548 | } | |
549 | } | |
550 | ||
551 | r = fnStashString(s, r, t-s); // get heap-allocated token string | |
552 | t = fnSkipWhite(t); // skip any trailing white space | |
553 | s = t; // return updated source pointer | |
554 | ||
555 | s2 = t; // return updated global source pointer | |
556 | ||
557 | return r; // return heap-allocated token string | |
558 | } | |
559 | ||
560 | ||
561 | ||
562 | /*============================================================================================ | |
563 | ||
564 | Function : fnScanToken | |
565 | ||
566 | Description : This function collects the next command-line argument, breaking on | |
567 | unquoted white space or I/O redirection symbols. Quote symbols are not | |
568 | copied into the output. | |
569 | When called, any leading white space has already been skipped. | |
570 | ||
571 | Parameters : x (IN) - Input string in which the token is scanned. | |
572 | r (IN) - The resultant return string. | |
573 | ||
574 | Returns : String. | |
575 | ||
576 | ==============================================================================================*/ | |
577 | ||
578 | char *fnScanToken(char *x, char *r) | |
579 | { | |
580 | register char *s = x; // input string position | |
581 | register char *t = x; // output string position | |
582 | register char quote = '\0'; // either NULL, or single quote, or double quote | |
583 | register char ch = '\0'; | |
584 | register char c = '\0'; | |
585 | ||
586 | while (*s) | |
587 | { | |
588 | ch = *s; // invariant: ch != 0 | |
589 | ||
590 | // look to see if we've reached the end of the token | |
591 | if (!quote) // but don't look for token break if we're inside quotes | |
592 | { | |
593 | if (isspace(ch)) | |
594 | break; // break on whitespace | |
595 | if (ch=='>') | |
596 | break; // break on ">" (redirect stdout) | |
597 | if (ch=='<') | |
598 | break; // break on "<" (redirect stdin) | |
599 | if (ch=='&' && x[1]=='>') | |
600 | break; // break on "&>" (redirect both stdout & stderr) | |
601 | } | |
602 | ||
603 | // process the next source character | |
604 | if (ch=='\\' && (c=s[1]) && (c=='\\'||c=='>'||c=='<'||c==quote)) | |
605 | { | |
606 | //-----------------if an escaped '\\', '>', '<', or quote... | |
607 | s++; // ...skip over the backslash... | |
608 | *t++ = *s++; // ...and copy the escaped character | |
609 | } | |
610 | else if (ch==quote) // (won't match unless inside quotes because invariant ch!=0) | |
611 | { | |
612 | //-----------------if close quote... | |
613 | s++; // ...skip over the quote... | |
614 | quote=0; // ...and leave quote mode | |
615 | } | |
616 | else if (!quote && (ch=='"' || ch=='\'')) | |
617 | { | |
618 | //-----------------if opening quote... | |
619 | quote = *s++; // ...enter quote mode (remembering quote char, and skipping the quote) | |
620 | } | |
621 | else | |
622 | { //----------if normal character... | |
623 | *t++ = *s++; // ...copy the character | |
624 | } | |
625 | } | |
626 | ||
627 | // clean up return values | |
628 | r = fnStashString(x, r, t-x); // get heap-allocated token string | |
629 | s = fnSkipWhite(s); // skip any trailing white space | |
630 | x = s; // return updated source pointer | |
631 | ||
632 | s1 = s; // return updated global source pointer | |
633 | ||
634 | return r; | |
635 | } | |
636 | ||
637 | ||
638 | ||
639 | /*============================================================================================ | |
640 | ||
641 | Function : fnStashString | |
642 | ||
643 | Description : This function return the heap-allocated token string. | |
644 | ||
645 | Parameters : s (IN) - Input string from which the token is extracted. | |
646 | buffer (IN) - Return string. | |
647 | length (IN) - Length of the token to be extracted. | |
648 | ||
649 | Returns : String. | |
650 | ||
651 | ==============================================================================================*/ | |
652 | ||
653 | char *fnStashString(char *s, char *buffer, int length) | |
654 | { | |
655 | if (length <= 0) | |
656 | { | |
657 | // Copy "" instead of NULL since "" indicates that there is memory allocated having no/null value. | |
658 | // NULL indicates that there is no memory allocated to it! | |
659 | strcpy(buffer, ""); | |
660 | } | |
661 | else | |
662 | { | |
663 | strncpy(buffer, s, length); | |
664 | buffer[length] = '\0'; | |
665 | } | |
666 | ||
667 | return buffer; | |
668 | } | |
669 | ||
670 | ||
671 | ||
672 | /*============================================================================================ | |
673 | ||
674 | Function : fnDeleteArgument | |
675 | ||
676 | Description : This function deletes an argument (that was originally appended) from the list. | |
677 | ||
678 | Parameters : pclp (IN) - CommandLine structure. | |
679 | index (IN) - Index of the argument to be deleted. | |
680 | ||
681 | Returns : Nothing. | |
682 | ||
683 | ==============================================================================================*/ | |
684 | ||
685 | void fnDeleteArgument(PCOMMANDLINEPARSER pclp, int index) | |
686 | { | |
687 | int i = index; | |
688 | ||
689 | ||
690 | // If index is greater than the no. of arguments, just return. | |
691 | if (index >= pclp->m_argc) | |
692 | return; | |
693 | ||
694 | // Move all the arguments after the index one up. | |
695 | while(i < (pclp->m_argv_len-1)) | |
696 | { | |
697 | strcpy(pclp->m_argv[i], pclp->m_argv[i+1]); | |
698 | i++; | |
699 | } | |
700 | ||
701 | ||
702 | // Delete the last one and free memory. | |
703 | if ( pclp->m_argv[i] ) | |
704 | { | |
705 | free(pclp->m_argv[i]); | |
706 | pclp->m_argv[i] = NULL; | |
707 | } | |
708 | ||
709 | ||
710 | pclp->m_argc--; // Decrement the number of arguments. | |
711 | pclp->m_argv_len--; | |
712 | ||
713 | return; | |
714 | } | |
715 | ||
716 | ||
717 | ||
718 | /*============================================================================================ | |
719 | ||
720 | Function : fnMy_MkTemp | |
721 | ||
722 | Description : This is a standard ANSI C mktemp for NetWare | |
723 | ||
724 | Parameters : templatestr (IN) - Input temp filename. | |
725 | ||
726 | Returns : String. | |
727 | ||
728 | ==============================================================================================*/ | |
729 | ||
730 | char* fnMy_MkTemp(char* templatestr) | |
731 | { | |
732 | char* pXs=NULL; | |
733 | char numbuf[50]={'\0'}; | |
734 | int count=0; | |
735 | char* pPid=NULL; | |
736 | ||
737 | char termchar = '\0'; | |
738 | char letter = 'a'; | |
78196db0 | 739 | char letter1 = 'a'; |
2986a63f JH |
740 | |
741 | ||
742 | if (templatestr && (pXs = strstr(templatestr, (char *)"XXXXXX"))) | |
743 | { | |
744 | // generate temp name | |
745 | termchar = pXs[6]; | |
746 | ltoa(GetThreadID(), numbuf, 16); | |
747 | // numbuf[sizeof(numbuf)-1] = '\0'; | |
748 | numbuf[strlen(numbuf)-1] = '\0'; | |
749 | // beware! thread IDs are 8 hex digits on NW 4.11 and only the | |
750 | // lower digits seem to change, whereas on NW 5 they are in the | |
751 | // range of < 1000 hex or 3 hex digits in length. So the following | |
752 | // logic ensures we use the least significant portion of the number. | |
753 | if (strlen(numbuf) > 5) | |
754 | pPid = &numbuf[strlen(numbuf)-5]; | |
755 | else | |
756 | pPid = numbuf; | |
757 | ||
78196db0 | 758 | /** |
1db1659f JH |
759 | Backtick operation uses temp files that are stored under NWDEFPERLTEMP |
760 | directory. They are temporarily used and then cleaned up after usage. | |
761 | In cases where multiple backtick operations are used that call some | |
762 | complex scripts, new temp files will be created before the old ones are | |
763 | deleted. So, we need to have a provision to create many temp files. | |
764 | Hence the below logic. It is found that provision for 26 files may | |
765 | not be enough in some cases. | |
766 | ||
767 | This below logic allows 26 files (like, pla00015.tmp through plz00015.tmp) | |
768 | plus 6x26=676 (like, plaa0015.tmp through plzz0015.tmp) | |
78196db0 JH |
769 | **/ |
770 | ||
2986a63f JH |
771 | letter = 'a'; |
772 | do | |
773 | { | |
774 | sprintf(pXs, (char *)"%c%05.5s", letter, pPid); | |
775 | pXs[6] = termchar; | |
776 | if (access(templatestr, 0) != 0) // File does not exist | |
777 | { | |
778 | return templatestr; | |
779 | } | |
780 | letter++; | |
781 | } while (letter <= 'z'); | |
782 | ||
78196db0 JH |
783 | letter1 = 'a'; |
784 | do | |
785 | { | |
786 | letter = 'a'; | |
787 | do | |
788 | { | |
789 | sprintf(pXs, (char *)"%c%c%04.5s", letter1, letter, pPid); | |
790 | pXs[6] = termchar; | |
791 | if (access(templatestr, 0) != 0) // File does not exist | |
792 | { | |
793 | return templatestr; | |
794 | } | |
795 | letter++; | |
796 | } while (letter <= 'z'); | |
797 | letter1++; | |
798 | } while (letter1 <= 'z'); | |
799 | ||
2986a63f JH |
800 | errno = ENOENT; |
801 | return NULL; | |
802 | } | |
803 | else | |
804 | { | |
805 | errno = EINVAL; | |
806 | return NULL; | |
807 | } | |
808 | } | |
809 | ||
810 | ||
811 | ||
812 | /*============================================================================================ | |
813 | ||
814 | Function : fnSystemCommand | |
815 | ||
816 | Description : This function constructs a system command from the given | |
817 | null-terminated argv array and runs the command on the system console. | |
818 | ||
819 | Parameters : argv (IN) - Array of input commands. | |
820 | argc (IN) - Number of input parameters. | |
821 | ||
822 | Returns : Nothing. | |
823 | ||
824 | ==============================================================================================*/ | |
825 | ||
826 | void fnSystemCommand (char** argv, int argc) | |
827 | { | |
828 | // calculate the size of a temp buffer needed | |
829 | int k = 0; | |
830 | int totalSize = 0; | |
831 | int bytes = 0; | |
832 | char* tempCmd = NULL; | |
833 | char* tptr = NULL; | |
834 | ||
835 | ||
836 | for(k=0; k<argc; k++) | |
837 | totalSize += strlen(argv[k]) + 1; | |
838 | ||
839 | tempCmd = (char *) malloc((totalSize+1) * sizeof(char)); | |
840 | if (!tempCmd) | |
841 | return; | |
842 | tptr = tempCmd; | |
843 | ||
844 | for(k=0; k<argc; k++) | |
845 | tptr += sprintf(tptr, (char *)"%s ", argv[k]); | |
846 | *tptr = 0; | |
847 | ||
848 | if (stricmp(argv[0], PERL_COMMAND_NAME) == 0) | |
849 | fnInternalPerlLaunchHandler(tempCmd); // Launch perl. | |
850 | else | |
851 | system(tempCmd); | |
852 | ||
853 | ||
854 | free(tempCmd); | |
855 | tempCmd = NULL; | |
856 | return; | |
857 | } | |
858 |