util.c revision 1.25 1 /* $NetBSD: util.c,v 1.25 2000/05/04 18:29:53 drochner Exp $ */
2
3 /*
4 * Missing stuff from OS's
5 */
6
7 #ifdef MAKE_BOOTSTRAP
8 static char rcsid[] = "$NetBSD: util.c,v 1.25 2000/05/04 18:29:53 drochner Exp $";
9 #else
10 #include <sys/cdefs.h>
11 #ifndef lint
12 __RCSID("$NetBSD: util.c,v 1.25 2000/05/04 18:29:53 drochner Exp $");
13 #endif
14 #endif
15
16 #include <stdio.h>
17 #include <time.h>
18 #include "make.h"
19 #include <sys/param.h>
20
21 #ifndef __STDC__
22 # ifndef const
23 # define const
24 # endif
25 #endif
26
27 #ifdef sun
28
29
30
31 extern int errno, sys_nerr;
32 extern char *sys_errlist[];
33
34 char *
35 strerror(e)
36 int e;
37 {
38 static char buf[100];
39 if (e < 0 || e >= sys_nerr) {
40 snprintf(buf, sizeof(buf), "Unknown error %d", e);
41 return buf;
42 }
43 else
44 return sys_errlist[e];
45 }
46 #endif
47
48 #ifdef ultrix
49 #include <string.h>
50
51 /* strdup
52 *
53 * Make a duplicate of a string.
54 * For systems which lack this function.
55 */
56 char *
57 strdup(str)
58 const char *str;
59 {
60 size_t len;
61 char *p;
62
63 if (str == NULL)
64 return NULL;
65 len = strlen(str) + 1;
66 p = emalloc(len);
67
68 return memcpy(p, str, len);
69 }
70
71 #endif
72
73 #if defined(sun) || defined(__hpux) || defined(__sgi)
74
75 int
76 setenv(name, value, dum)
77 const char *name;
78 const char *value;
79 int dum;
80 {
81 register char *p;
82 int len = strlen(name) + strlen(value) + 2; /* = \0 */
83 char *ptr = (char*) emalloc(len);
84
85 (void) dum;
86
87 if (ptr == NULL)
88 return -1;
89
90 p = ptr;
91
92 while (*name)
93 *p++ = *name++;
94
95 *p++ = '=';
96
97 while (*value)
98 *p++ = *value++;
99
100 *p = '\0';
101
102 len = putenv(ptr);
103 /* free(ptr); */
104 return len;
105 }
106 #endif
107
108 #ifdef __hpux
109 #include <sys/types.h>
110 #include <sys/param.h>
111 #include <sys/syscall.h>
112 #include <sys/signal.h>
113 #include <sys/stat.h>
114 #include <stdio.h>
115 #include <dirent.h>
116 #include <sys/time.h>
117 #include <time.h>
118 #include <unistd.h>
119
120
121 int
122 killpg(pid, sig)
123 int pid, sig;
124 {
125 return kill(-pid, sig);
126 }
127
128 void
129 srandom(seed)
130 long seed;
131 {
132 srand48(seed);
133 }
134
135 long
136 random()
137 {
138 return lrand48();
139 }
140
141 /* turn into bsd signals */
142 void (*
143 signal(s, a)) __P((int))
144 int s;
145 void (*a) __P((int));
146 {
147 struct sigvec osv, sv;
148
149 (void) sigvector(s, (struct sigvec *) 0, &osv);
150 sv = osv;
151 sv.sv_handler = a;
152 #ifdef SV_BSDSIG
153 sv.sv_flags = SV_BSDSIG;
154 #endif
155
156 if (sigvector(s, &sv, (struct sigvec *) 0) == -1)
157 return (BADSIG);
158 return (osv.sv_handler);
159 }
160
161 #if !defined(BSD) && !defined(d_fileno)
162 # define d_fileno d_ino
163 #endif
164
165 #ifndef DEV_DEV_COMPARE
166 # define DEV_DEV_COMPARE(a, b) ((a) == (b))
167 #endif
168 #define ISDOT(c) ((c)[0] == '.' && (((c)[1] == '\0') || ((c)[1] == '/')))
169 #define ISDOTDOT(c) ((c)[0] == '.' && ISDOT(&((c)[1])))
170
171
172 /* strrcpy():
173 * Like strcpy, going backwards and returning the new pointer
174 */
175 static char *
176 strrcpy(ptr, str)
177 register char *ptr, *str;
178 {
179 register int len = strlen(str);
180
181 while (len)
182 *--ptr = str[--len];
183
184 return (ptr);
185 } /* end strrcpy */
186
187
188 char *
189 getwd(pathname)
190 char *pathname;
191 {
192 DIR *dp;
193 struct dirent *d;
194 extern int errno;
195
196 struct stat st_root, st_cur, st_next, st_dotdot;
197 char pathbuf[MAXPATHLEN], nextpathbuf[MAXPATHLEN * 2];
198 char *pathptr, *nextpathptr, *cur_name_add;
199
200 /* find the inode of root */
201 if (stat("/", &st_root) == -1) {
202 (void) snprintf(pathname, sizeof(pathname),
203 "getwd: Cannot stat \"/\" (%s)", strerror(errno));
204 return (NULL);
205 }
206 pathbuf[MAXPATHLEN - 1] = '\0';
207 pathptr = &pathbuf[MAXPATHLEN - 1];
208 nextpathbuf[MAXPATHLEN - 1] = '\0';
209 cur_name_add = nextpathptr = &nextpathbuf[MAXPATHLEN - 1];
210
211 /* find the inode of the current directory */
212 if (lstat(".", &st_cur) == -1) {
213 (void) snprintf(pathname, sizeof(pathname),
214 "getwd: Cannot stat \".\" (%s)", strerror(errno));
215 return (NULL);
216 }
217 nextpathptr = strrcpy(nextpathptr, "../");
218
219 /* Descend to root */
220 for (;;) {
221
222 /* look if we found root yet */
223 if (st_cur.st_ino == st_root.st_ino &&
224 DEV_DEV_COMPARE(st_cur.st_dev, st_root.st_dev)) {
225 (void) strcpy(pathname, *pathptr != '/' ? "/" : pathptr);
226 return (pathname);
227 }
228
229 /* open the parent directory */
230 if (stat(nextpathptr, &st_dotdot) == -1) {
231 (void) snprintf(pathname, sizeof(pathname),
232 "getwd: Cannot stat directory \"%s\" (%s)",
233 nextpathptr, strerror(errno));
234 return (NULL);
235 }
236 if ((dp = opendir(nextpathptr)) == NULL) {
237 (void) snprintf(pathname, sizeof(pathname),
238 "getwd: Cannot open directory \"%s\" (%s)",
239 nextpathptr, strerror(errno));
240 return (NULL);
241 }
242
243 /* look in the parent for the entry with the same inode */
244 if (DEV_DEV_COMPARE(st_dotdot.st_dev, st_cur.st_dev)) {
245 /* Parent has same device. No need to stat every member */
246 for (d = readdir(dp); d != NULL; d = readdir(dp))
247 if (d->d_fileno == st_cur.st_ino)
248 break;
249 }
250 else {
251 /*
252 * Parent has a different device. This is a mount point so we
253 * need to stat every member
254 */
255 for (d = readdir(dp); d != NULL; d = readdir(dp)) {
256 if (ISDOT(d->d_name) || ISDOTDOT(d->d_name))
257 continue;
258 (void) strcpy(cur_name_add, d->d_name);
259 if (lstat(nextpathptr, &st_next) == -1) {
260 (void) snprintf(pathname, sizeof(pathname),
261 "getwd: Cannot stat \"%s\" (%s)",
262 d->d_name, strerror(errno));
263 (void) closedir(dp);
264 return (NULL);
265 }
266 /* check if we found it yet */
267 if (st_next.st_ino == st_cur.st_ino &&
268 DEV_DEV_COMPARE(st_next.st_dev, st_cur.st_dev))
269 break;
270 }
271 }
272 if (d == NULL) {
273 (void) snprintf(pathname, sizeof(pathname),
274 "getwd: Cannot find \".\" in \"..\"");
275 (void) closedir(dp);
276 return (NULL);
277 }
278 st_cur = st_dotdot;
279 pathptr = strrcpy(pathptr, d->d_name);
280 pathptr = strrcpy(pathptr, "/");
281 nextpathptr = strrcpy(nextpathptr, "../");
282 (void) closedir(dp);
283 *cur_name_add = '\0';
284 }
285 } /* end getwd */
286
287
288 char *sys_siglist[] = {
289 "Signal 0",
290 "Hangup", /* SIGHUP */
291 "Interrupt", /* SIGINT */
292 "Quit", /* SIGQUIT */
293 "Illegal instruction", /* SIGILL */
294 "Trace/BPT trap", /* SIGTRAP */
295 "IOT trap", /* SIGIOT */
296 "EMT trap", /* SIGEMT */
297 "Floating point exception", /* SIGFPE */
298 "Killed", /* SIGKILL */
299 "Bus error", /* SIGBUS */
300 "Segmentation fault", /* SIGSEGV */
301 "Bad system call", /* SIGSYS */
302 "Broken pipe", /* SIGPIPE */
303 "Alarm clock", /* SIGALRM */
304 "Terminated", /* SIGTERM */
305 "User defined signal 1", /* SIGUSR1 */
306 "User defined signal 2", /* SIGUSR2 */
307 "Child exited", /* SIGCLD */
308 "Power-fail restart", /* SIGPWR */
309 "Virtual timer expired", /* SIGVTALRM */
310 "Profiling timer expired", /* SIGPROF */
311 "I/O possible", /* SIGIO */
312 "Window size changes", /* SIGWINDOW */
313 "Stopped (signal)", /* SIGSTOP */
314 "Stopped", /* SIGTSTP */
315 "Continued", /* SIGCONT */
316 "Stopped (tty input)", /* SIGTTIN */
317 "Stopped (tty output)", /* SIGTTOU */
318 "Urgent I/O condition", /* SIGURG */
319 "Remote lock lost (NFS)", /* SIGLOST */
320 "Signal 31", /* reserved */
321 "DIL signal" /* SIGDIL */
322 };
323
324 int
325 utimes(file, tvp)
326 char *file;
327 struct timeval tvp[2];
328 {
329 struct utimbuf t;
330
331 t.actime = tvp[0].tv_sec;
332 t.modtime = tvp[1].tv_sec;
333 return(utime(file, &t));
334 }
335
336
337 #endif /* __hpux */
338
339 #if defined(sun) && defined(__svr4__)
340 #include <signal.h>
341
342 /* turn into bsd signals */
343 void (*
344 signal(s, a)) __P((int))
345 int s;
346 void (*a) __P((int));
347 {
348 struct sigaction sa, osa;
349
350 sa.sa_handler = a;
351 sigemptyset(&sa.sa_mask);
352 sa.sa_flags = SA_RESTART;
353
354 if (sigaction(s, &sa, &osa) == -1)
355 return SIG_ERR;
356 else
357 return osa.sa_handler;
358 }
359
360 #endif
361
362 #if !defined(BSD4_4) && !defined(SUNOS_5_7) && !defined(__linux__)
363 #ifdef __STDC__
364 #include <stdarg.h>
365 #else
366 #include <varargs.h>
367 #endif
368
369 #if !defined(__osf__)
370 #ifdef _IOSTRG
371 #define STRFLAG (_IOSTRG|_IOWRT) /* no _IOWRT: avoid stdio bug */
372 #else
373 #if 0
374 #define STRFLAG (_IOREAD) /* XXX: Assume svr4 stdio */
375 #endif
376 #endif /* _IOSTRG */
377 #endif /* __osf__ */
378
379 int
380 vsnprintf(s, n, fmt, args)
381 char *s;
382 size_t n;
383 const char *fmt;
384 va_list args;
385 {
386 #ifdef STRFLAG
387 FILE fakebuf;
388
389 fakebuf._flag = STRFLAG;
390 /*
391 * Some os's are char * _ptr, others are unsigned char *_ptr...
392 * We cast to void * to make everyone happy.
393 */
394 fakebuf._ptr = (void *) s;
395 fakebuf._cnt = n-1;
396 fakebuf._file = -1;
397 _doprnt(fmt, args, &fakebuf);
398 fakebuf._cnt++;
399 putc('\0', &fakebuf);
400 if (fakebuf._cnt<0)
401 fakebuf._cnt = 0;
402 return (n-fakebuf._cnt-1);
403 #else
404 (void) vsprintf(s, fmt, args);
405 return strlen(s);
406 #endif
407 }
408
409 int
410 #ifdef __STDC__
411 snprintf(char *s, size_t n, const char *fmt, ...)
412 #else
413 snprintf(va_alist)
414 va_dcl
415 #endif
416 {
417 va_list ap;
418 int rv;
419 #ifdef __STDC__
420 va_start(ap, fmt);
421 #else
422 char *s;
423 size_t n;
424 const char *fmt;
425
426 va_start(ap);
427
428 s = va_arg(ap, char *);
429 n = va_arg(ap, size_t);
430 fmt = va_arg(ap, const char *);
431 #endif
432 rv = vsnprintf(s, n, fmt, ap);
433 va_end(ap);
434 return rv;
435 }
436
437 #if !defined(__SVR4) && !defined(__linux__) && !defined(ultrix) \
438 && !defined(__sgi) && !defined(__osf__)
439
440 int
441 strftime(buf, len, fmt, tm)
442 char *buf;
443 size_t len;
444 const char *fmt;
445 const struct tm *tm;
446 {
447 static char months[][4] = {
448 "Jan", "Feb", "Mar", "Apr", "May", "Jun",
449 "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
450 };
451
452 size_t s;
453 char *b = buf;
454
455 while (*fmt) {
456 if (len == 0)
457 return buf - b;
458 if (*fmt != '%') {
459 *buf++ = *fmt++;
460 len--;
461 continue;
462 }
463 switch (*fmt++) {
464 case '%':
465 *buf++ = '%';
466 len--;
467 if (len == 0) return buf - b;
468 /*FALLTHROUGH*/
469 case '\0':
470 *buf = '%';
471 s = 1;
472 break;
473 case 'k':
474 s = snprintf(buf, len, "%d", tm->tm_hour);
475 break;
476 case 'M':
477 s = snprintf(buf, len, "%02d", tm->tm_min);
478 break;
479 case 'S':
480 s = snprintf(buf, len, "%02d", tm->tm_sec);
481 break;
482 case 'b':
483 if (tm->tm_mon >= 12)
484 return buf - b;
485 s = snprintf(buf, len, "%s", months[tm->tm_mon]);
486 break;
487 case 'd':
488 s = snprintf(buf, len, "%s", tm->tm_mday);
489 break;
490 case 'Y':
491 s = snprintf(buf, len, "%s", 1900 + tm->tm_year);
492 break;
493 default:
494 s = snprintf(buf, len, "Unsupported format %c",
495 fmt[-1]);
496 break;
497 }
498 buf += s;
499 len -= s;
500 }
501 }
502 #endif
503 #endif
504