f4ff9455 |
1 | /* |
2 | * Platform-independent routines shared between all PuTTY programs. |
3 | */ |
4 | |
374330e2 |
5 | #include <stdio.h> |
6 | #include <stdlib.h> |
1709795f |
7 | #include <stdarg.h> |
46cfeac8 |
8 | #include <limits.h> |
57356d63 |
9 | #include <ctype.h> |
5471d09a |
10 | #include <assert.h> |
374330e2 |
11 | #include "putty.h" |
12 | |
d57f70af |
13 | /* |
14 | * Parse a string block size specification. This is approximately a |
15 | * subset of the block size specs supported by GNU fileutils: |
16 | * "nk" = n kilobytes |
17 | * "nM" = n megabytes |
18 | * "nG" = n gigabytes |
19 | * All numbers are decimal, and suffixes refer to powers of two. |
20 | * Case-insensitive. |
21 | */ |
22 | unsigned long parse_blocksize(const char *bs) |
23 | { |
24 | char *suf; |
25 | unsigned long r = strtoul(bs, &suf, 10); |
26 | if (*suf != '\0') { |
0d119367 |
27 | while (*suf && isspace((unsigned char)*suf)) suf++; |
d57f70af |
28 | switch (*suf) { |
29 | case 'k': case 'K': |
30 | r *= 1024ul; |
31 | break; |
32 | case 'm': case 'M': |
33 | r *= 1024ul * 1024ul; |
34 | break; |
35 | case 'g': case 'G': |
36 | r *= 1024ul * 1024ul * 1024ul; |
37 | break; |
38 | case '\0': |
39 | default: |
40 | break; |
41 | } |
42 | } |
43 | return r; |
44 | } |
45 | |
d45d4c07 |
46 | /* |
47 | * Parse a ^C style character specification. |
48 | * Returns NULL in `next' if we didn't recognise it as a control character, |
49 | * in which case `c' should be ignored. |
50 | * The precise current parsing is an oddity inherited from the terminal |
447940b3 |
51 | * answerback-string parsing code. All sequences start with ^; all except |
52 | * ^<123> are two characters. The ones that are worth keeping are probably: |
d45d4c07 |
53 | * ^? 127 |
54 | * ^@A-Z[\]^_ 0-31 |
55 | * a-z 1-26 |
447940b3 |
56 | * <num> specified by number (decimal, 0octal, 0xHEX) |
d45d4c07 |
57 | * ~ ^ escape |
58 | */ |
59 | char ctrlparse(char *s, char **next) |
60 | { |
61 | char c = 0; |
62 | if (*s != '^') { |
63 | *next = NULL; |
d45d4c07 |
64 | } else { |
65 | s++; |
66 | if (*s == '\0') { |
67 | *next = NULL; |
447940b3 |
68 | } else if (*s == '<') { |
69 | s++; |
70 | c = (char)strtol(s, next, 0); |
71 | if ((*next == s) || (**next != '>')) { |
72 | c = 0; |
73 | *next = NULL; |
74 | } else |
75 | (*next)++; |
d45d4c07 |
76 | } else if (*s >= 'a' && *s <= 'z') { |
77 | c = (*s - ('a' - 1)); |
447940b3 |
78 | *next = s+1; |
d45d4c07 |
79 | } else if ((*s >= '@' && *s <= '_') || *s == '?' || (*s & 0x80)) { |
80 | c = ('@' ^ *s); |
447940b3 |
81 | *next = s+1; |
d45d4c07 |
82 | } else if (*s == '~') { |
83 | c = '^'; |
447940b3 |
84 | *next = s+1; |
d45d4c07 |
85 | } |
d45d4c07 |
86 | } |
447940b3 |
87 | return c; |
d45d4c07 |
88 | } |
89 | |
edd0cb8a |
90 | prompts_t *new_prompts(void *frontend) |
91 | { |
92 | prompts_t *p = snew(prompts_t); |
93 | p->prompts = NULL; |
94 | p->n_prompts = 0; |
95 | p->frontend = frontend; |
96 | p->data = NULL; |
97 | p->to_server = TRUE; /* to be on the safe side */ |
98 | p->name = p->instruction = NULL; |
99 | p->name_reqd = p->instr_reqd = FALSE; |
100 | return p; |
101 | } |
102 | void add_prompt(prompts_t *p, char *promptstr, int echo, size_t len) |
103 | { |
104 | prompt_t *pr = snew(prompt_t); |
8a9977e5 |
105 | char *result = snewn(len, char); |
edd0cb8a |
106 | pr->prompt = promptstr; |
107 | pr->echo = echo; |
108 | pr->result = result; |
109 | pr->result_len = len; |
110 | p->n_prompts++; |
111 | p->prompts = sresize(p->prompts, p->n_prompts, prompt_t *); |
112 | p->prompts[p->n_prompts-1] = pr; |
113 | } |
114 | void free_prompts(prompts_t *p) |
115 | { |
116 | size_t i; |
117 | for (i=0; i < p->n_prompts; i++) { |
118 | prompt_t *pr = p->prompts[i]; |
119 | memset(pr->result, 0, pr->result_len); /* burn the evidence */ |
120 | sfree(pr->result); |
121 | sfree(pr->prompt); |
122 | sfree(pr); |
123 | } |
124 | sfree(p->prompts); |
125 | sfree(p->name); |
126 | sfree(p->instruction); |
127 | sfree(p); |
128 | } |
129 | |
03f64569 |
130 | /* ---------------------------------------------------------------------- |
131 | * String handling routines. |
132 | */ |
133 | |
57356d63 |
134 | char *dupstr(const char *s) |
03f64569 |
135 | { |
6d113886 |
136 | char *p = NULL; |
137 | if (s) { |
138 | int len = strlen(s); |
139 | p = snewn(len + 1, char); |
140 | strcpy(p, s); |
141 | } |
03f64569 |
142 | return p; |
143 | } |
144 | |
145 | /* Allocate the concatenation of N strings. Terminate arg list with NULL. */ |
57356d63 |
146 | char *dupcat(const char *s1, ...) |
03f64569 |
147 | { |
148 | int len; |
149 | char *p, *q, *sn; |
150 | va_list ap; |
151 | |
152 | len = strlen(s1); |
153 | va_start(ap, s1); |
154 | while (1) { |
155 | sn = va_arg(ap, char *); |
156 | if (!sn) |
157 | break; |
158 | len += strlen(sn); |
159 | } |
160 | va_end(ap); |
161 | |
3d88e64d |
162 | p = snewn(len + 1, char); |
03f64569 |
163 | strcpy(p, s1); |
164 | q = p + strlen(p); |
165 | |
166 | va_start(ap, s1); |
167 | while (1) { |
168 | sn = va_arg(ap, char *); |
169 | if (!sn) |
170 | break; |
171 | strcpy(q, sn); |
172 | q += strlen(q); |
173 | } |
174 | va_end(ap); |
175 | |
176 | return p; |
177 | } |
178 | |
57356d63 |
179 | /* |
180 | * Do an sprintf(), but into a custom-allocated buffer. |
181 | * |
28da9e3d |
182 | * Currently I'm doing this via vsnprintf. This has worked so far, |
e1ef3c29 |
183 | * but it's not good, because vsnprintf is not available on all |
184 | * platforms. There's an ifdef to use `_vsnprintf', which seems |
185 | * to be the local name for it on Windows. Other platforms may |
186 | * lack it completely, in which case it'll be time to rewrite |
187 | * this function in a totally different way. |
28da9e3d |
188 | * |
189 | * The only `properly' portable solution I can think of is to |
190 | * implement my own format string scanner, which figures out an |
191 | * upper bound for the length of each formatting directive, |
192 | * allocates the buffer as it goes along, and calls sprintf() to |
193 | * actually process each directive. If I ever need to actually do |
194 | * this, some caveats: |
195 | * |
196 | * - It's very hard to find a reliable upper bound for |
197 | * floating-point values. %f, in particular, when supplied with |
198 | * a number near to the upper or lower limit of representable |
199 | * numbers, could easily take several hundred characters. It's |
200 | * probably feasible to predict this statically using the |
201 | * constants in <float.h>, or even to predict it dynamically by |
202 | * looking at the exponent of the specific float provided, but |
203 | * it won't be fun. |
204 | * |
205 | * - Don't forget to _check_, after calling sprintf, that it's |
206 | * used at most the amount of space we had available. |
207 | * |
208 | * - Fault any formatting directive we don't fully understand. The |
209 | * aim here is to _guarantee_ that we never overflow the buffer, |
210 | * because this is a security-critical function. If we see a |
211 | * directive we don't know about, we should panic and die rather |
212 | * than run any risk. |
57356d63 |
213 | */ |
214 | char *dupprintf(const char *fmt, ...) |
215 | { |
216 | char *ret; |
217 | va_list ap; |
218 | va_start(ap, fmt); |
219 | ret = dupvprintf(fmt, ap); |
220 | va_end(ap); |
221 | return ret; |
222 | } |
223 | char *dupvprintf(const char *fmt, va_list ap) |
224 | { |
225 | char *buf; |
226 | int len, size; |
227 | |
3d88e64d |
228 | buf = snewn(512, char); |
57356d63 |
229 | size = 512; |
230 | |
231 | while (1) { |
232 | #ifdef _WINDOWS |
233 | #define vsnprintf _vsnprintf |
234 | #endif |
e1ef3c29 |
235 | #ifdef va_copy |
236 | /* Use the `va_copy' macro mandated by C99, if present. |
237 | * XXX some environments may have this as __va_copy() */ |
238 | va_list aq; |
239 | va_copy(aq, ap); |
240 | len = vsnprintf(buf, size, fmt, aq); |
241 | va_end(aq); |
242 | #else |
243 | /* Ugh. No va_copy macro, so do something nasty. |
244 | * Technically, you can't reuse a va_list like this: it is left |
245 | * unspecified whether advancing a va_list pointer modifies its |
246 | * value or something it points to, so on some platforms calling |
247 | * vsnprintf twice on the same va_list might fail hideously |
248 | * (indeed, it has been observed to). |
249 | * XXX the autoconf manual suggests that using memcpy() will give |
250 | * "maximum portability". */ |
57356d63 |
251 | len = vsnprintf(buf, size, fmt, ap); |
e1ef3c29 |
252 | #endif |
57356d63 |
253 | if (len >= 0 && len < size) { |
254 | /* This is the C99-specified criterion for snprintf to have |
255 | * been completely successful. */ |
256 | return buf; |
257 | } else if (len > 0) { |
258 | /* This is the C99 error condition: the returned length is |
259 | * the required buffer size not counting the NUL. */ |
260 | size = len + 1; |
261 | } else { |
262 | /* This is the pre-C99 glibc error condition: <0 means the |
263 | * buffer wasn't big enough, so we enlarge it a bit and hope. */ |
264 | size += 512; |
265 | } |
3d88e64d |
266 | buf = sresize(buf, size, char); |
57356d63 |
267 | } |
268 | } |
269 | |
39934deb |
270 | /* |
271 | * Read an entire line of text from a file. Return a buffer |
272 | * malloced to be as big as necessary (caller must free). |
273 | */ |
274 | char *fgetline(FILE *fp) |
275 | { |
276 | char *ret = snewn(512, char); |
277 | int size = 512, len = 0; |
278 | while (fgets(ret + len, size - len, fp)) { |
279 | len += strlen(ret + len); |
280 | if (ret[len-1] == '\n') |
281 | break; /* got a newline, we're done */ |
282 | size = len + 512; |
283 | ret = sresize(ret, size, char); |
284 | } |
285 | if (len == 0) { /* first fgets returned NULL */ |
286 | sfree(ret); |
287 | return NULL; |
288 | } |
289 | ret[len] = '\0'; |
290 | return ret; |
291 | } |
292 | |
03f64569 |
293 | /* ---------------------------------------------------------------------- |
1549e076 |
294 | * Base64 encoding routine. This is required in public-key writing |
295 | * but also in HTTP proxy handling, so it's centralised here. |
296 | */ |
297 | |
298 | void base64_encode_atom(unsigned char *data, int n, char *out) |
299 | { |
300 | static const char base64_chars[] = |
301 | "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; |
302 | |
303 | unsigned word; |
304 | |
305 | word = data[0] << 16; |
306 | if (n > 1) |
307 | word |= data[1] << 8; |
308 | if (n > 2) |
309 | word |= data[2]; |
310 | out[0] = base64_chars[(word >> 18) & 0x3F]; |
311 | out[1] = base64_chars[(word >> 12) & 0x3F]; |
312 | if (n > 1) |
313 | out[2] = base64_chars[(word >> 6) & 0x3F]; |
314 | else |
315 | out[2] = '='; |
316 | if (n > 2) |
317 | out[3] = base64_chars[word & 0x3F]; |
318 | else |
319 | out[3] = '='; |
320 | } |
321 | |
322 | /* ---------------------------------------------------------------------- |
5471d09a |
323 | * Generic routines to deal with send buffers: a linked list of |
324 | * smallish blocks, with the operations |
325 | * |
326 | * - add an arbitrary amount of data to the end of the list |
327 | * - remove the first N bytes from the list |
328 | * - return a (pointer,length) pair giving some initial data in |
329 | * the list, suitable for passing to a send or write system |
330 | * call |
7983f47e |
331 | * - retrieve a larger amount of initial data from the list |
5471d09a |
332 | * - return the current size of the buffer chain in bytes |
333 | */ |
334 | |
335 | #define BUFFER_GRANULE 512 |
336 | |
337 | struct bufchain_granule { |
338 | struct bufchain_granule *next; |
339 | int buflen, bufpos; |
340 | char buf[BUFFER_GRANULE]; |
341 | }; |
342 | |
343 | void bufchain_init(bufchain *ch) |
344 | { |
345 | ch->head = ch->tail = NULL; |
346 | ch->buffersize = 0; |
347 | } |
348 | |
349 | void bufchain_clear(bufchain *ch) |
350 | { |
351 | struct bufchain_granule *b; |
352 | while (ch->head) { |
353 | b = ch->head; |
354 | ch->head = ch->head->next; |
355 | sfree(b); |
356 | } |
357 | ch->tail = NULL; |
358 | ch->buffersize = 0; |
359 | } |
360 | |
361 | int bufchain_size(bufchain *ch) |
362 | { |
363 | return ch->buffersize; |
364 | } |
365 | |
e0e7dff8 |
366 | void bufchain_add(bufchain *ch, const void *data, int len) |
5471d09a |
367 | { |
e0e7dff8 |
368 | const char *buf = (const char *)data; |
5471d09a |
369 | |
bfa5400d |
370 | if (len == 0) return; |
371 | |
5471d09a |
372 | ch->buffersize += len; |
373 | |
374 | if (ch->tail && ch->tail->buflen < BUFFER_GRANULE) { |
375 | int copylen = min(len, BUFFER_GRANULE - ch->tail->buflen); |
376 | memcpy(ch->tail->buf + ch->tail->buflen, buf, copylen); |
377 | buf += copylen; |
378 | len -= copylen; |
379 | ch->tail->buflen += copylen; |
380 | } |
381 | while (len > 0) { |
382 | int grainlen = min(len, BUFFER_GRANULE); |
383 | struct bufchain_granule *newbuf; |
3d88e64d |
384 | newbuf = snew(struct bufchain_granule); |
5471d09a |
385 | newbuf->bufpos = 0; |
386 | newbuf->buflen = grainlen; |
387 | memcpy(newbuf->buf, buf, grainlen); |
388 | buf += grainlen; |
389 | len -= grainlen; |
390 | if (ch->tail) |
391 | ch->tail->next = newbuf; |
392 | else |
393 | ch->head = ch->tail = newbuf; |
394 | newbuf->next = NULL; |
395 | ch->tail = newbuf; |
396 | } |
397 | } |
398 | |
399 | void bufchain_consume(bufchain *ch, int len) |
400 | { |
7983f47e |
401 | struct bufchain_granule *tmp; |
402 | |
5471d09a |
403 | assert(ch->buffersize >= len); |
7983f47e |
404 | while (len > 0) { |
405 | int remlen = len; |
406 | assert(ch->head != NULL); |
407 | if (remlen >= ch->head->buflen - ch->head->bufpos) { |
408 | remlen = ch->head->buflen - ch->head->bufpos; |
409 | tmp = ch->head; |
410 | ch->head = tmp->next; |
411 | sfree(tmp); |
412 | if (!ch->head) |
413 | ch->tail = NULL; |
414 | } else |
415 | ch->head->bufpos += remlen; |
416 | ch->buffersize -= remlen; |
417 | len -= remlen; |
5471d09a |
418 | } |
419 | } |
420 | |
421 | void bufchain_prefix(bufchain *ch, void **data, int *len) |
422 | { |
423 | *len = ch->head->buflen - ch->head->bufpos; |
424 | *data = ch->head->buf + ch->head->bufpos; |
425 | } |
426 | |
7983f47e |
427 | void bufchain_fetch(bufchain *ch, void *data, int len) |
428 | { |
429 | struct bufchain_granule *tmp; |
430 | char *data_c = (char *)data; |
431 | |
432 | tmp = ch->head; |
433 | |
434 | assert(ch->buffersize >= len); |
435 | while (len > 0) { |
436 | int remlen = len; |
437 | |
438 | assert(tmp != NULL); |
439 | if (remlen >= tmp->buflen - tmp->bufpos) |
440 | remlen = tmp->buflen - tmp->bufpos; |
441 | memcpy(data_c, tmp->buf + tmp->bufpos, remlen); |
442 | |
443 | tmp = tmp->next; |
444 | len -= remlen; |
445 | data_c += remlen; |
446 | } |
447 | } |
448 | |
03f64569 |
449 | /* ---------------------------------------------------------------------- |
b191636d |
450 | * My own versions of malloc, realloc and free. Because I want |
451 | * malloc and realloc to bomb out and exit the program if they run |
452 | * out of memory, realloc to reliably call malloc if passed a NULL |
453 | * pointer, and free to reliably do nothing if passed a NULL |
454 | * pointer. We can also put trace printouts in, if we need to; and |
455 | * we can also replace the allocator with an ElectricFence-like |
456 | * one. |
457 | */ |
458 | |
459 | #ifdef MINEFIELD |
d0912d1f |
460 | void *minefield_c_malloc(size_t size); |
461 | void minefield_c_free(void *p); |
462 | void *minefield_c_realloc(void *p, size_t size); |
463 | #endif |
374330e2 |
464 | |
465 | #ifdef MALLOC_LOG |
466 | static FILE *fp = NULL; |
467 | |
d7da76ca |
468 | static char *mlog_file = NULL; |
469 | static int mlog_line = 0; |
470 | |
32874aea |
471 | void mlog(char *file, int line) |
472 | { |
d7da76ca |
473 | mlog_file = file; |
474 | mlog_line = line; |
c662dbc0 |
475 | if (!fp) { |
374330e2 |
476 | fp = fopen("putty_mem.log", "w"); |
c662dbc0 |
477 | setvbuf(fp, NULL, _IONBF, BUFSIZ); |
478 | } |
374330e2 |
479 | if (fp) |
32874aea |
480 | fprintf(fp, "%s:%d: ", file, line); |
374330e2 |
481 | } |
482 | #endif |
483 | |
46cfeac8 |
484 | void *safemalloc(size_t n, size_t size) |
32874aea |
485 | { |
b191636d |
486 | void *p; |
46cfeac8 |
487 | |
488 | if (n > INT_MAX / size) { |
489 | p = NULL; |
490 | } else { |
491 | size *= n; |
66ab14c7 |
492 | if (size == 0) size = 1; |
b191636d |
493 | #ifdef MINEFIELD |
46cfeac8 |
494 | p = minefield_c_malloc(size); |
b191636d |
495 | #else |
46cfeac8 |
496 | p = malloc(size); |
b191636d |
497 | #endif |
46cfeac8 |
498 | } |
499 | |
374330e2 |
500 | if (!p) { |
d7da76ca |
501 | char str[200]; |
502 | #ifdef MALLOC_LOG |
503 | sprintf(str, "Out of memory! (%s:%d, size=%d)", |
504 | mlog_file, mlog_line, size); |
1b2ef365 |
505 | fprintf(fp, "*** %s\n", str); |
506 | fclose(fp); |
d7da76ca |
507 | #else |
508 | strcpy(str, "Out of memory!"); |
509 | #endif |
1709795f |
510 | modalfatalbox(str); |
374330e2 |
511 | } |
512 | #ifdef MALLOC_LOG |
513 | if (fp) |
514 | fprintf(fp, "malloc(%d) returns %p\n", size, p); |
515 | #endif |
516 | return p; |
517 | } |
518 | |
46cfeac8 |
519 | void *saferealloc(void *ptr, size_t n, size_t size) |
32874aea |
520 | { |
374330e2 |
521 | void *p; |
46cfeac8 |
522 | |
523 | if (n > INT_MAX / size) { |
524 | p = NULL; |
525 | } else { |
526 | size *= n; |
527 | if (!ptr) { |
b191636d |
528 | #ifdef MINEFIELD |
46cfeac8 |
529 | p = minefield_c_malloc(size); |
b191636d |
530 | #else |
46cfeac8 |
531 | p = malloc(size); |
b191636d |
532 | #endif |
46cfeac8 |
533 | } else { |
b191636d |
534 | #ifdef MINEFIELD |
46cfeac8 |
535 | p = minefield_c_realloc(ptr, size); |
b191636d |
536 | #else |
46cfeac8 |
537 | p = realloc(ptr, size); |
b191636d |
538 | #endif |
46cfeac8 |
539 | } |
b191636d |
540 | } |
46cfeac8 |
541 | |
374330e2 |
542 | if (!p) { |
d7da76ca |
543 | char str[200]; |
544 | #ifdef MALLOC_LOG |
545 | sprintf(str, "Out of memory! (%s:%d, size=%d)", |
546 | mlog_file, mlog_line, size); |
1b2ef365 |
547 | fprintf(fp, "*** %s\n", str); |
548 | fclose(fp); |
d7da76ca |
549 | #else |
550 | strcpy(str, "Out of memory!"); |
551 | #endif |
1709795f |
552 | modalfatalbox(str); |
374330e2 |
553 | } |
554 | #ifdef MALLOC_LOG |
555 | if (fp) |
556 | fprintf(fp, "realloc(%p,%d) returns %p\n", ptr, size, p); |
557 | #endif |
558 | return p; |
559 | } |
560 | |
32874aea |
561 | void safefree(void *ptr) |
562 | { |
374330e2 |
563 | if (ptr) { |
564 | #ifdef MALLOC_LOG |
565 | if (fp) |
566 | fprintf(fp, "free(%p)\n", ptr); |
567 | #endif |
b191636d |
568 | #ifdef MINEFIELD |
32874aea |
569 | minefield_c_free(ptr); |
b191636d |
570 | #else |
32874aea |
571 | free(ptr); |
b191636d |
572 | #endif |
374330e2 |
573 | } |
574 | #ifdef MALLOC_LOG |
575 | else if (fp) |
576 | fprintf(fp, "freeing null pointer - no action taken\n"); |
577 | #endif |
578 | } |
c82bda52 |
579 | |
03f64569 |
580 | /* ---------------------------------------------------------------------- |
581 | * Debugging routines. |
582 | */ |
583 | |
c82bda52 |
584 | #ifdef DEBUG |
d0912d1f |
585 | extern void dputs(char *); /* defined in per-platform *misc.c */ |
db9c0f86 |
586 | |
d0912d1f |
587 | void debug_printf(char *fmt, ...) |
32874aea |
588 | { |
57356d63 |
589 | char *buf; |
db9c0f86 |
590 | va_list ap; |
591 | |
592 | va_start(ap, fmt); |
57356d63 |
593 | buf = dupvprintf(fmt, ap); |
32874aea |
594 | dputs(buf); |
57356d63 |
595 | sfree(buf); |
c82bda52 |
596 | va_end(ap); |
597 | } |
db9c0f86 |
598 | |
599 | |
32874aea |
600 | void debug_memdump(void *buf, int len, int L) |
601 | { |
db9c0f86 |
602 | int i; |
603 | unsigned char *p = buf; |
765c4200 |
604 | char foo[17]; |
db9c0f86 |
605 | if (L) { |
606 | int delta; |
d0912d1f |
607 | debug_printf("\t%d (0x%x) bytes:\n", len, len); |
db9c0f86 |
608 | delta = 15 & (int) p; |
609 | p -= delta; |
610 | len += delta; |
611 | } |
612 | for (; 0 < len; p += 16, len -= 16) { |
32874aea |
613 | dputs(" "); |
614 | if (L) |
d0912d1f |
615 | debug_printf("%p: ", p); |
32874aea |
616 | strcpy(foo, "................"); /* sixteen dots */ |
db9c0f86 |
617 | for (i = 0; i < 16 && i < len; ++i) { |
618 | if (&p[i] < (unsigned char *) buf) { |
32874aea |
619 | dputs(" "); /* 3 spaces */ |
765c4200 |
620 | foo[i] = ' '; |
db9c0f86 |
621 | } else { |
d0912d1f |
622 | debug_printf("%c%02.2x", |
32874aea |
623 | &p[i] != (unsigned char *) buf |
624 | && i % 4 ? '.' : ' ', p[i] |
625 | ); |
765c4200 |
626 | if (p[i] >= ' ' && p[i] <= '~') |
32874aea |
627 | foo[i] = (char) p[i]; |
db9c0f86 |
628 | } |
629 | } |
765c4200 |
630 | foo[i] = '\0'; |
d0912d1f |
631 | debug_printf("%*s%s\n", (16 - i) * 3 + 2, "", foo); |
db9c0f86 |
632 | } |
633 | } |
634 | |
32874aea |
635 | #endif /* def DEBUG */ |
7374c779 |
636 | |
637 | /* |
638 | * Determine whether or not a Config structure represents a session |
639 | * which can sensibly be launched right now. |
640 | */ |
641 | int cfg_launchable(const Config *cfg) |
642 | { |
643 | if (cfg->protocol == PROT_SERIAL) |
644 | return cfg->serline[0] != 0; |
645 | else |
646 | return cfg->host[0] != 0; |
647 | } |
648 | |
649 | char const *cfg_dest(const Config *cfg) |
650 | { |
651 | if (cfg->protocol == PROT_SERIAL) |
652 | return cfg->serline; |
653 | else |
654 | return cfg->host; |
655 | } |