Commit | Line | Data |
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f324a387 | 1 | /*- |
ad787160 C |
2 | * Copyright (c) 1986, 1988, 1991, 1993 |
3 | * The Regents of the University of California. All rights reserved. | |
adb35f79 KB |
4 | * (c) UNIX System Laboratories, Inc. |
5 | * All or some portions of this file are derived from material licensed | |
6 | * to the University of California by American Telephone and Telegraph | |
7 | * Co. or Unix System Laboratories, Inc. and are reproduced herein with | |
8 | * the permission of UNIX System Laboratories, Inc. | |
f324a387 | 9 | * |
ad787160 C |
10 | * Redistribution and use in source and binary forms, with or without |
11 | * modification, are permitted provided that the following conditions | |
12 | * are met: | |
13 | * 1. Redistributions of source code must retain the above copyright | |
14 | * notice, this list of conditions and the following disclaimer. | |
15 | * 2. Redistributions in binary form must reproduce the above copyright | |
16 | * notice, this list of conditions and the following disclaimer in the | |
17 | * documentation and/or other materials provided with the distribution. | |
18 | * 3. All advertising materials mentioning features or use of this software | |
19 | * must display the following acknowledgement: | |
20 | * This product includes software developed by the University of | |
21 | * California, Berkeley and its contributors. | |
22 | * 4. Neither the name of the University nor the names of its contributors | |
23 | * may be used to endorse or promote products derived from this software | |
24 | * without specific prior written permission. | |
da7c5cc6 | 25 | * |
ad787160 C |
26 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
27 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
28 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
29 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
30 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
31 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
32 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
33 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
34 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
35 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
36 | * SUCH DAMAGE. | |
37 | * | |
ed554bc5 | 38 | * @(#)subr_prf.c 8.3 (Berkeley) 1/21/94 |
da7c5cc6 | 39 | */ |
8cbb423c | 40 | |
ed782152 KB |
41 | #include <sys/param.h> |
42 | #include <sys/systm.h> | |
43 | #include <sys/buf.h> | |
44 | #include <sys/conf.h> | |
45 | #include <sys/reboot.h> | |
46 | #include <sys/msgbuf.h> | |
47 | #include <sys/proc.h> | |
48 | #include <sys/ioctl.h> | |
49 | #include <sys/vnode.h> | |
50 | #include <sys/file.h> | |
51 | #include <sys/tty.h> | |
52 | #include <sys/tprintf.h> | |
53 | #include <sys/syslog.h> | |
54 | #include <sys/malloc.h> | |
96d38f03 | 55 | |
f324a387 KB |
56 | /* |
57 | * Note that stdarg.h and the ANSI style va_start macro is used for both | |
58 | * ANSI and traditional C compilers. | |
59 | */ | |
60 | #include <machine/stdarg.h> | |
61 | ||
f7f8b75f | 62 | #ifdef KADB |
38a01dbe | 63 | #include <machine/kdbparam.h> |
3eb8e016 MK |
64 | #endif |
65 | ||
f324a387 KB |
66 | #define TOCONS 0x01 |
67 | #define TOTTY 0x02 | |
68 | #define TOLOG 0x04 | |
34ef3482 | 69 | |
ed2d0915 | 70 | struct tty *constty; /* pointer to console "window" tty */ |
ae032917 | 71 | |
f324a387 | 72 | extern cnputc(); /* standard console putc */ |
f26dc35a | 73 | int (*v_putc)() = cnputc; /* routine to putc on virtual console */ |
f324a387 | 74 | |
890fb5ad | 75 | void logpri __P((int level)); |
d4339c84 | 76 | static void putchar __P((int ch, int flags, struct tty *tp)); |
d4339c84 | 77 | static char *ksprintn __P((u_long num, int base, int *len)); |
c77828a2 | 78 | void kprintf __P((const char *fmt, int flags, struct tty *tp, va_list ap)); |
ed782152 KB |
79 | |
80 | int consintr = 1; /* Ok to handle console interrupts? */ | |
ed2d0915 | 81 | |
8cbb423c | 82 | /* |
ed782152 KB |
83 | * Variable panicstr contains argument to first call to panic; used as flag |
84 | * to indicate that the kernel has already called panic. | |
8cbb423c | 85 | */ |
ed782152 | 86 | const char *panicstr; |
3e199d90 | 87 | |
f324a387 KB |
88 | /* |
89 | * Panic is called on unresolvable fatal errors. It prints "panic: mesg", | |
90 | * and then reboots. If we are called twice, then we avoid trying to sync | |
91 | * the disks as this often leads to recursive panics. | |
92 | */ | |
c77828a2 | 93 | #ifdef __GNUC__ |
ea95b3cd | 94 | volatile void boot(int flags); /* boot() does not return */ |
c77828a2 MT |
95 | volatile /* panic() does not return */ |
96 | #endif | |
f324a387 | 97 | void |
ed782152 KB |
98 | #ifdef __STDC__ |
99 | panic(const char *fmt, ...) | |
100 | #else | |
08901f4a | 101 | panic(fmt, va_alist) |
ed782152 KB |
102 | char *fmt; |
103 | #endif | |
f324a387 | 104 | { |
c77828a2 | 105 | int bootopt; |
ed782152 | 106 | va_list ap; |
fb1db32c | 107 | |
ed782152 | 108 | bootopt = RB_AUTOBOOT | RB_DUMP; |
f324a387 KB |
109 | if (panicstr) |
110 | bootopt |= RB_NOSYNC; | |
111 | else | |
ed782152 KB |
112 | panicstr = fmt; |
113 | ||
ed782152 | 114 | va_start(ap, fmt); |
c77828a2 | 115 | printf("panic: %r\n", fmt, ap); |
ed782152 KB |
116 | va_end(ap); |
117 | ||
f324a387 KB |
118 | #ifdef KGDB |
119 | kgdb_panic(); | |
120 | #endif | |
121 | #ifdef KADB | |
08901f4a RC |
122 | if (boothowto & RB_KDB) |
123 | kdbpanic(); | |
f324a387 KB |
124 | #endif |
125 | boot(bootopt); | |
126 | } | |
127 | ||
128 | /* | |
129 | * Warn that a system table is full. | |
130 | */ | |
131 | void | |
132 | tablefull(tab) | |
ea95b3cd | 133 | const char *tab; |
96d38f03 BJ |
134 | { |
135 | ||
f324a387 | 136 | log(LOG_ERR, "%s: table is full\n", tab); |
96d38f03 BJ |
137 | } |
138 | ||
843267b1 | 139 | /* |
71e86b6c | 140 | * Uprintf prints to the controlling terminal for the current process. |
f324a387 KB |
141 | * It may block if the tty queue is overfull. No message is printed if |
142 | * the queue does not clear in a reasonable time. | |
843267b1 | 143 | */ |
f324a387 KB |
144 | void |
145 | #ifdef __STDC__ | |
146 | uprintf(const char *fmt, ...) | |
147 | #else | |
6534ed0a | 148 | uprintf(fmt, va_alist) |
b725a0ca | 149 | char *fmt; |
f324a387 | 150 | #endif |
96d38f03 | 151 | { |
8429d022 | 152 | register struct proc *p = curproc; |
f324a387 | 153 | va_list ap; |
96d38f03 | 154 | |
cf5ef508 | 155 | if (p->p_flag & P_CONTROLT && p->p_session->s_ttyvp) { |
f26dc35a | 156 | va_start(ap, fmt); |
f324a387 | 157 | kprintf(fmt, TOTTY, p->p_session->s_ttyp, ap); |
f26dc35a KB |
158 | va_end(ap); |
159 | } | |
35dc415e MT |
160 | } |
161 | ||
162 | tpr_t | |
3e199d90 MK |
163 | tprintf_open(p) |
164 | register struct proc *p; | |
35dc415e | 165 | { |
f26dc35a | 166 | |
cf5ef508 | 167 | if (p->p_flag & P_CONTROLT && p->p_session->s_ttyvp) { |
35dc415e | 168 | SESSHOLD(p->p_session); |
3e199d90 | 169 | return ((tpr_t) p->p_session); |
f324a387 KB |
170 | } |
171 | return ((tpr_t) NULL); | |
35dc415e MT |
172 | } |
173 | ||
3e199d90 | 174 | void |
35dc415e MT |
175 | tprintf_close(sess) |
176 | tpr_t sess; | |
177 | { | |
f26dc35a | 178 | |
35dc415e | 179 | if (sess) |
3e199d90 | 180 | SESSRELE((struct session *) sess); |
34ef3482 RC |
181 | } |
182 | ||
bd10af3f | 183 | /* |
35dc415e | 184 | * tprintf prints on the controlling terminal associated |
f324a387 | 185 | * with the given session. |
bd10af3f | 186 | */ |
f324a387 KB |
187 | void |
188 | #ifdef __STDC__ | |
189 | tprintf(tpr_t tpr, const char *fmt, ...) | |
190 | #else | |
6534ed0a | 191 | tprintf(tpr, fmt, va_alist) |
3e199d90 | 192 | tpr_t tpr; |
34ef3482 | 193 | char *fmt; |
f324a387 | 194 | #endif |
34ef3482 | 195 | { |
3e199d90 MK |
196 | register struct session *sess = (struct session *)tpr; |
197 | struct tty *tp = NULL; | |
35dc415e | 198 | int flags = TOLOG; |
f324a387 | 199 | va_list ap; |
34ef3482 | 200 | |
6f71a9f6 | 201 | logpri(LOG_INFO); |
3e199d90 | 202 | if (sess && sess->s_ttyvp && ttycheckoutq(sess->s_ttyp, 0)) { |
35dc415e | 203 | flags |= TOTTY; |
3e199d90 MK |
204 | tp = sess->s_ttyp; |
205 | } | |
f324a387 KB |
206 | va_start(ap, fmt); |
207 | kprintf(fmt, flags, tp, ap); | |
208 | va_end(ap); | |
6f71a9f6 | 209 | logwakeup(); |
34ef3482 RC |
210 | } |
211 | ||
f324a387 KB |
212 | /* |
213 | * Ttyprintf displays a message on a tty; it should be used only by | |
214 | * the tty driver, or anything that knows the underlying tty will not | |
215 | * be revoke(2)'d away. Other callers should use tprintf. | |
216 | */ | |
217 | void | |
218 | #ifdef __STDC__ | |
219 | ttyprintf(struct tty *tp, const char *fmt, ...) | |
220 | #else | |
6534ed0a | 221 | ttyprintf(tp, fmt, va_alist) |
f324a387 KB |
222 | struct tty *tp; |
223 | char *fmt; | |
224 | #endif | |
225 | { | |
226 | va_list ap; | |
227 | ||
228 | va_start(ap, fmt); | |
229 | kprintf(fmt, TOTTY, tp, ap); | |
230 | va_end(ap); | |
231 | } | |
232 | ||
3e199d90 | 233 | extern int log_open; |
35dc415e | 234 | |
34ef3482 | 235 | /* |
f324a387 KB |
236 | * Log writes to the log buffer, and guarantees not to sleep (so can be |
237 | * called by interrupt routines). If there is no process reading the | |
238 | * log yet, it writes to the console also. | |
34ef3482 | 239 | */ |
f324a387 KB |
240 | void |
241 | #ifdef __STDC__ | |
242 | log(int level, const char *fmt, ...) | |
243 | #else | |
6534ed0a | 244 | log(level, fmt, va_alist) |
f324a387 | 245 | int level; |
34ef3482 | 246 | char *fmt; |
f324a387 | 247 | #endif |
34ef3482 | 248 | { |
293eb5c9 | 249 | register int s; |
f324a387 | 250 | va_list ap; |
34ef3482 | 251 | |
293eb5c9 | 252 | s = splhigh(); |
6f71a9f6 | 253 | logpri(level); |
f324a387 KB |
254 | va_start(ap, fmt); |
255 | kprintf(fmt, TOLOG, NULL, ap); | |
34ef3482 | 256 | splx(s); |
f324a387 | 257 | va_end(ap); |
f26dc35a KB |
258 | if (!log_open) { |
259 | va_start(ap, fmt); | |
260 | kprintf(fmt, TOCONS, NULL, ap); | |
261 | va_end(ap); | |
262 | } | |
34ef3482 | 263 | logwakeup(); |
96d38f03 BJ |
264 | } |
265 | ||
890fb5ad | 266 | void |
6f71a9f6 MK |
267 | logpri(level) |
268 | int level; | |
269 | { | |
d4339c84 KB |
270 | register int ch; |
271 | register char *p; | |
6f71a9f6 | 272 | |
f324a387 | 273 | putchar('<', TOLOG, NULL); |
d4339c84 KB |
274 | for (p = ksprintn((u_long)level, 10, NULL); ch = *p--;) |
275 | putchar(ch, TOLOG, NULL); | |
f324a387 | 276 | putchar('>', TOLOG, NULL); |
6f71a9f6 MK |
277 | } |
278 | ||
f324a387 KB |
279 | void |
280 | #ifdef __STDC__ | |
281 | addlog(const char *fmt, ...) | |
282 | #else | |
6534ed0a | 283 | addlog(fmt, va_alist) |
c55a3dd0 | 284 | char *fmt; |
f324a387 | 285 | #endif |
c55a3dd0 | 286 | { |
293eb5c9 | 287 | register int s; |
f324a387 | 288 | va_list ap; |
c55a3dd0 | 289 | |
293eb5c9 | 290 | s = splhigh(); |
f324a387 KB |
291 | va_start(ap, fmt); |
292 | kprintf(fmt, TOLOG, NULL, ap); | |
c55a3dd0 | 293 | splx(s); |
f324a387 | 294 | va_end(ap); |
f26dc35a KB |
295 | if (!log_open) { |
296 | va_start(ap, fmt); | |
297 | kprintf(fmt, TOCONS, NULL, ap); | |
298 | va_end(ap); | |
299 | } | |
c55a3dd0 MK |
300 | logwakeup(); |
301 | } | |
302 | ||
f324a387 KB |
303 | void |
304 | #ifdef __STDC__ | |
305 | printf(const char *fmt, ...) | |
306 | #else | |
6534ed0a | 307 | printf(fmt, va_alist) |
f324a387 KB |
308 | char *fmt; |
309 | #endif | |
8cbb423c | 310 | { |
f324a387 | 311 | va_list ap; |
f26dc35a | 312 | register int savintr; |
8cbb423c | 313 | |
f324a387 KB |
314 | savintr = consintr; /* disable interrupts */ |
315 | consintr = 0; | |
316 | va_start(ap, fmt); | |
317 | kprintf(fmt, TOCONS | TOLOG, NULL, ap); | |
318 | va_end(ap); | |
319 | if (!panicstr) | |
320 | logwakeup(); | |
321 | consintr = savintr; /* reenable interrupts */ | |
8cbb423c BJ |
322 | } |
323 | ||
324 | /* | |
f324a387 KB |
325 | * Scaled down version of printf(3). |
326 | * | |
327 | * Two additional formats: | |
328 | * | |
329 | * The format %b is supported to decode error registers. | |
330 | * Its usage is: | |
331 | * | |
c77828a2 | 332 | * printf("reg=%b\n", regval, "<base><arg>*"); |
f324a387 KB |
333 | * |
334 | * where <base> is the output base expressed as a control character, e.g. | |
335 | * \10 gives octal; \20 gives hex. Each arg is a sequence of characters, | |
336 | * the first of which gives the bit number to be inspected (origin 1), and | |
337 | * the next characters (up to a control character, i.e. a character <= 32), | |
338 | * give the name of the register. Thus: | |
339 | * | |
ed782152 | 340 | * kprintf("reg=%b\n", 3, "\10\2BITTWO\1BITONE\n"); |
f324a387 KB |
341 | * |
342 | * would produce output: | |
343 | * | |
344 | * reg=3<BITTWO,BITONE> | |
345 | * | |
ed782152 KB |
346 | * The format %r passes an additional format string and argument list |
347 | * recursively. Its usage is: | |
f324a387 | 348 | * |
ed782152 | 349 | * fn(char *fmt, ...) |
f26dc35a KB |
350 | * { |
351 | * va_list ap; | |
352 | * va_start(ap, fmt); | |
c77828a2 | 353 | * printf("prefix: %r: suffix\n", fmt, ap); |
f26dc35a | 354 | * va_end(ap); |
ed782152 | 355 | * } |
d4339c84 KB |
356 | * |
357 | * Space or zero padding and a field width are supported for the numeric | |
358 | * formats only. | |
8cbb423c | 359 | */ |
106a3d16 | 360 | void |
c77828a2 | 361 | kprintf(fmt, flags, tp, ap) |
8345edbf | 362 | register const char *fmt; |
f324a387 | 363 | int flags; |
8345edbf | 364 | struct tty *tp; |
f324a387 | 365 | va_list ap; |
8cbb423c | 366 | { |
40a0752a | 367 | register char *p, *q; |
f324a387 | 368 | register int ch, n; |
d4339c84 KB |
369 | u_long ul; |
370 | int base, lflag, tmp, width; | |
371 | char padc; | |
f324a387 KB |
372 | |
373 | for (;;) { | |
d4339c84 KB |
374 | padc = ' '; |
375 | width = 0; | |
8b22ea34 | 376 | while ((ch = *(u_char *)fmt++) != '%') { |
f324a387 KB |
377 | if (ch == '\0') |
378 | return; | |
8345edbf | 379 | putchar(ch, flags, tp); |
f324a387 KB |
380 | } |
381 | lflag = 0; | |
8b22ea34 | 382 | reswitch: switch (ch = *(u_char *)fmt++) { |
d4339c84 KB |
383 | case '0': |
384 | padc = '0'; | |
385 | goto reswitch; | |
386 | case '1': case '2': case '3': case '4': | |
387 | case '5': case '6': case '7': case '8': case '9': | |
388 | for (width = 0;; ++fmt) { | |
389 | width = width * 10 + ch - '0'; | |
390 | ch = *fmt; | |
391 | if (ch < '0' || ch > '9') | |
392 | break; | |
393 | } | |
394 | goto reswitch; | |
f324a387 KB |
395 | case 'l': |
396 | lflag = 1; | |
397 | goto reswitch; | |
398 | case 'b': | |
399 | ul = va_arg(ap, int); | |
400 | p = va_arg(ap, char *); | |
40a0752a | 401 | for (q = ksprintn(ul, *p++, NULL); ch = *q--;) |
d4339c84 | 402 | putchar(ch, flags, tp); |
f324a387 KB |
403 | |
404 | if (!ul) | |
405 | break; | |
406 | ||
d4339c84 | 407 | for (tmp = 0; n = *p++;) { |
f324a387 | 408 | if (ul & (1 << (n - 1))) { |
d4339c84 | 409 | putchar(tmp ? ',' : '<', flags, tp); |
f324a387 | 410 | for (; (n = *p) > ' '; ++p) |
8345edbf | 411 | putchar(n, flags, tp); |
d4339c84 | 412 | tmp = 1; |
f324a387 | 413 | } else |
a6e3920d CT |
414 | for (; *p > ' '; ++p) |
415 | continue; | |
f324a387 | 416 | } |
d4339c84 | 417 | if (tmp) |
8345edbf | 418 | putchar('>', flags, tp); |
f324a387 KB |
419 | break; |
420 | case 'c': | |
8345edbf | 421 | putchar(va_arg(ap, int), flags, tp); |
f324a387 KB |
422 | break; |
423 | case 'r': | |
424 | p = va_arg(ap, char *); | |
8345edbf | 425 | kprintf(p, flags, tp, va_arg(ap, va_list)); |
f324a387 KB |
426 | break; |
427 | case 's': | |
428 | p = va_arg(ap, char *); | |
429 | while (ch = *p++) | |
8345edbf | 430 | putchar(ch, flags, tp); |
f324a387 | 431 | break; |
f324a387 | 432 | case 'd': |
d4339c84 | 433 | ul = lflag ? va_arg(ap, long) : va_arg(ap, int); |
f324a387 | 434 | if ((long)ul < 0) { |
8345edbf | 435 | putchar('-', flags, tp); |
f324a387 KB |
436 | ul = -(long)ul; |
437 | } | |
d4339c84 KB |
438 | base = 10; |
439 | goto number; | |
f324a387 | 440 | case 'o': |
d4339c84 KB |
441 | ul = lflag ? va_arg(ap, u_long) : va_arg(ap, u_int); |
442 | base = 8; | |
f26dc35a | 443 | goto number; |
f324a387 | 444 | case 'u': |
d4339c84 KB |
445 | ul = lflag ? va_arg(ap, u_long) : va_arg(ap, u_int); |
446 | base = 10; | |
447 | goto number; | |
f324a387 | 448 | case 'x': |
d4339c84 KB |
449 | ul = lflag ? va_arg(ap, u_long) : va_arg(ap, u_int); |
450 | base = 16; | |
451 | number: p = ksprintn(ul, base, &tmp); | |
452 | if (width && (width -= tmp) > 0) | |
453 | while (width--) | |
454 | putchar(padc, flags, tp); | |
455 | while (ch = *p--) | |
456 | putchar(ch, flags, tp); | |
f324a387 KB |
457 | break; |
458 | default: | |
8345edbf | 459 | putchar('%', flags, tp); |
f324a387 | 460 | if (lflag) |
8345edbf | 461 | putchar('l', flags, tp); |
d4339c84 KB |
462 | /* FALLTHROUGH */ |
463 | case '%': | |
8345edbf | 464 | putchar(ch, flags, tp); |
f324a387 | 465 | } |
3eb8e016 | 466 | } |
8cbb423c BJ |
467 | } |
468 | ||
96d38f03 | 469 | /* |
f324a387 KB |
470 | * Print a character on console or users terminal. If destination is |
471 | * the console then the last MSGBUFS characters are saved in msgbuf for | |
472 | * inspection later. | |
96d38f03 | 473 | */ |
f324a387 | 474 | static void |
8345edbf | 475 | putchar(c, flags, tp) |
843267b1 | 476 | register int c; |
f324a387 | 477 | int flags; |
8345edbf | 478 | struct tty *tp; |
96d38f03 | 479 | { |
c55a3dd0 | 480 | extern int msgbufmapped; |
293eb5c9 | 481 | register struct msgbuf *mbp; |
96d38f03 | 482 | |
ed2d0915 | 483 | if (panicstr) |
f324a387 | 484 | constty = NULL; |
8345edbf KB |
485 | if ((flags & TOCONS) && tp == NULL && constty) { |
486 | tp = constty; | |
ed2d0915 MK |
487 | flags |= TOTTY; |
488 | } | |
8345edbf KB |
489 | if ((flags & TOTTY) && tp && tputchar(c, tp) < 0 && |
490 | (flags & TOCONS) && tp == constty) | |
f324a387 KB |
491 | constty = NULL; |
492 | if ((flags & TOLOG) && | |
493 | c != '\0' && c != '\r' && c != 0177 && msgbufmapped) { | |
293eb5c9 | 494 | mbp = msgbufp; |
9db58063 | 495 | if (mbp->msg_magic != MSG_MAGIC) { |
f26dc35a | 496 | bzero((caddr_t)mbp, sizeof(*mbp)); |
9db58063 | 497 | mbp->msg_magic = MSG_MAGIC; |
90f8d91f | 498 | } |
9db58063 KM |
499 | mbp->msg_bufc[mbp->msg_bufx++] = c; |
500 | if (mbp->msg_bufx < 0 || mbp->msg_bufx >= MSG_BSIZE) | |
501 | mbp->msg_bufx = 0; | |
96d38f03 | 502 | } |
ad787160 C |
503 | if ((flags & TOCONS) && constty == NULL && c != '\0') |
504 | (*v_putc)(c); | |
8cbb423c BJ |
505 | } |
506 | ||
fdd11a14 | 507 | /* |
ad787160 | 508 | * Scaled down version of sprintf(3). |
fdd11a14 | 509 | */ |
ad787160 C |
510 | #ifdef __STDC__ |
511 | sprintf(char *buf, const char *cfmt, ...) | |
512 | #else | |
513 | sprintf(buf, cfmt, va_alist) | |
514 | char *buf, *cfmt; | |
515 | #endif | |
fdd11a14 | 516 | { |
ad787160 C |
517 | register const char *fmt = cfmt; |
518 | register char *p, *bp; | |
519 | register int ch, base; | |
520 | u_long ul; | |
521 | int lflag; | |
522 | va_list ap; | |
523 | ||
524 | va_start(ap, cfmt); | |
525 | for (bp = buf; ; ) { | |
526 | while ((ch = *(u_char *)fmt++) != '%') | |
527 | if ((*bp++ = ch) == '\0') | |
528 | return ((bp - buf) - 1); | |
529 | ||
530 | lflag = 0; | |
531 | reswitch: switch (ch = *(u_char *)fmt++) { | |
532 | case 'l': | |
533 | lflag = 1; | |
534 | goto reswitch; | |
535 | case 'c': | |
536 | *bp++ = va_arg(ap, int); | |
537 | break; | |
538 | case 's': | |
539 | p = va_arg(ap, char *); | |
540 | while (*bp++ = *p++) | |
541 | continue; | |
542 | --bp; | |
543 | break; | |
544 | case 'd': | |
545 | ul = lflag ? va_arg(ap, long) : va_arg(ap, int); | |
546 | if ((long)ul < 0) { | |
547 | *bp++ = '-'; | |
548 | ul = -(long)ul; | |
549 | } | |
550 | base = 10; | |
551 | goto number; | |
552 | break; | |
553 | case 'o': | |
554 | ul = lflag ? va_arg(ap, u_long) : va_arg(ap, u_int); | |
555 | base = 8; | |
556 | goto number; | |
557 | break; | |
558 | case 'u': | |
559 | ul = lflag ? va_arg(ap, u_long) : va_arg(ap, u_int); | |
560 | base = 10; | |
561 | goto number; | |
562 | break; | |
563 | case 'x': | |
564 | ul = lflag ? va_arg(ap, u_long) : va_arg(ap, u_int); | |
565 | base = 16; | |
566 | number: for (p = ksprintn(ul, base, NULL); ch = *p--;) | |
567 | *bp++ = ch; | |
568 | break; | |
569 | default: | |
570 | *bp++ = '%'; | |
571 | if (lflag) | |
572 | *bp++ = 'l'; | |
573 | /* FALLTHROUGH */ | |
574 | case '%': | |
575 | *bp++ = ch; | |
576 | } | |
577 | } | |
578 | va_end(ap); | |
fdd11a14 BJ |
579 | } |
580 | ||
96d38f03 | 581 | /* |
ad787160 C |
582 | * Put a number (base <= 16) in a buffer in reverse order; return an |
583 | * optional length and a pointer to the NULL terminated (preceded?) | |
584 | * buffer. | |
96d38f03 | 585 | */ |
ad787160 C |
586 | static char * |
587 | ksprintn(ul, base, lenp) | |
588 | register u_long ul; | |
589 | register int base, *lenp; | |
590 | { /* A long in base 8, plus NULL. */ | |
591 | static char buf[sizeof(long) * NBBY / 3 + 2]; | |
592 | register char *p; | |
593 | ||
594 | p = buf; | |
595 | do { | |
596 | *++p = "0123456789abcdef"[ul % base]; | |
597 | } while (ul /= base); | |
598 | if (lenp) | |
599 | *lenp = p - buf; | |
600 | return (p); | |
96d38f03 | 601 | } |