util.c revision 1.14 1 /* $NetBSD: util.c,v 1.14 1997/07/11 20:17:38 christos Exp $ */
2
3 /*
4 * Missing stuff from OS's
5 */
6
7 #include <sys/cdefs.h>
8 #ifndef lint
9 __RCSID("$NetBSD: util.c,v 1.14 1997/07/11 20:17:38 christos Exp $");
10 #endif
11
12 #include <stdio.h>
13 #include "make.h"
14 #include <sys/param.h>
15
16 #ifndef __STDC__
17 # ifndef const
18 # define const
19 # endif
20 #endif
21
22 #ifdef sun
23
24
25
26 extern int errno, sys_nerr;
27 extern char *sys_errlist[];
28
29 char *
30 strerror(e)
31 int e;
32 {
33 static char buf[100];
34 if (e < 0 || e >= sys_nerr) {
35 sprintf(buf, "Unknown error %d", e);
36 return buf;
37 }
38 else
39 return sys_errlist[e];
40 }
41 #endif
42
43 #ifdef ultrix
44 #include <string.h>
45
46 /* strdup
47 *
48 * Make a duplicate of a string.
49 * For systems which lack this function.
50 */
51 char *
52 strdup(str)
53 const char *str;
54 {
55 size_t len;
56 char *p;
57
58 if (str == NULL)
59 return NULL;
60 len = strlen(str) + 1;
61 if ((p = malloc(len)) == NULL)
62 return NULL;
63
64 return memcpy(p, str, len);
65 }
66
67 #endif
68
69 #if defined(sun) || defined(__hpux) || defined(__sgi)
70
71 int
72 setenv(name, value, dum)
73 const char *name;
74 const char *value;
75 int dum;
76 {
77 register char *p;
78 int len = strlen(name) + strlen(value) + 2; /* = \0 */
79 char *ptr = (char*) malloc(len);
80
81 (void) dum;
82
83 if (ptr == NULL)
84 return -1;
85
86 p = ptr;
87
88 while (*name)
89 *p++ = *name++;
90
91 *p++ = '=';
92
93 while (*value)
94 *p++ = *value++;
95
96 *p = '\0';
97
98 len = putenv(ptr);
99 /* free(ptr); */
100 return len;
101 }
102 #endif
103
104 #ifdef __hpux
105 #include <sys/types.h>
106 #include <sys/param.h>
107 #include <sys/syscall.h>
108 #include <sys/signal.h>
109 #include <sys/stat.h>
110 #include <stdio.h>
111 #include <dirent.h>
112 #include <sys/time.h>
113 #include <time.h>
114 #include <unistd.h>
115
116
117 int
118 killpg(pid, sig)
119 int pid, sig;
120 {
121 return kill(-pid, sig);
122 }
123
124 void
125 srandom(seed)
126 long seed;
127 {
128 srand48(seed);
129 }
130
131 long
132 random()
133 {
134 return lrand48();
135 }
136
137 /* turn into bsd signals */
138 void (*
139 signal(s, a)) ()
140 int s;
141 void (*a)();
142 {
143 struct sigvec osv, sv;
144
145 (void) sigvector(s, (struct sigvec *) 0, &osv);
146 sv = osv;
147 sv.sv_handler = a;
148 #ifdef SV_BSDSIG
149 sv.sv_flags = SV_BSDSIG;
150 #endif
151
152 if (sigvector(s, &sv, (struct sigvec *) 0) == -1)
153 return (BADSIG);
154 return (osv.sv_handler);
155 }
156
157 #if !defined(BSD) && !defined(d_fileno)
158 # define d_fileno d_ino
159 #endif
160
161 #ifndef DEV_DEV_COMPARE
162 # define DEV_DEV_COMPARE(a, b) ((a) == (b))
163 #endif
164 #define ISDOT(c) ((c)[0] == '.' && (((c)[1] == '\0') || ((c)[1] == '/')))
165 #define ISDOTDOT(c) ((c)[0] == '.' && ISDOT(&((c)[1])))
166
167
168 /* strrcpy():
169 * Like strcpy, going backwards and returning the new pointer
170 */
171 static char *
172 strrcpy(ptr, str)
173 register char *ptr, *str;
174 {
175 register int len = strlen(str);
176
177 while (len)
178 *--ptr = str[--len];
179
180 return (ptr);
181 } /* end strrcpy */
182
183
184 char *
185 getwd(pathname)
186 char *pathname;
187 {
188 DIR *dp;
189 struct dirent *d;
190 extern int errno;
191
192 struct stat st_root, st_cur, st_next, st_dotdot;
193 char pathbuf[MAXPATHLEN], nextpathbuf[MAXPATHLEN * 2];
194 char *pathptr, *nextpathptr, *cur_name_add;
195
196 /* find the inode of root */
197 if (stat("/", &st_root) == -1) {
198 (void) sprintf(pathname,
199 "getwd: Cannot stat \"/\" (%s)", strerror(errno));
200 return (NULL);
201 }
202 pathbuf[MAXPATHLEN - 1] = '\0';
203 pathptr = &pathbuf[MAXPATHLEN - 1];
204 nextpathbuf[MAXPATHLEN - 1] = '\0';
205 cur_name_add = nextpathptr = &nextpathbuf[MAXPATHLEN - 1];
206
207 /* find the inode of the current directory */
208 if (lstat(".", &st_cur) == -1) {
209 (void) sprintf(pathname,
210 "getwd: Cannot stat \".\" (%s)", strerror(errno));
211 return (NULL);
212 }
213 nextpathptr = strrcpy(nextpathptr, "../");
214
215 /* Descend to root */
216 for (;;) {
217
218 /* look if we found root yet */
219 if (st_cur.st_ino == st_root.st_ino &&
220 DEV_DEV_COMPARE(st_cur.st_dev, st_root.st_dev)) {
221 (void) strcpy(pathname, *pathptr != '/' ? "/" : pathptr);
222 return (pathname);
223 }
224
225 /* open the parent directory */
226 if (stat(nextpathptr, &st_dotdot) == -1) {
227 (void) sprintf(pathname,
228 "getwd: Cannot stat directory \"%s\" (%s)",
229 nextpathptr, strerror(errno));
230 return (NULL);
231 }
232 if ((dp = opendir(nextpathptr)) == NULL) {
233 (void) sprintf(pathname,
234 "getwd: Cannot open directory \"%s\" (%s)",
235 nextpathptr, strerror(errno));
236 return (NULL);
237 }
238
239 /* look in the parent for the entry with the same inode */
240 if (DEV_DEV_COMPARE(st_dotdot.st_dev, st_cur.st_dev)) {
241 /* Parent has same device. No need to stat every member */
242 for (d = readdir(dp); d != NULL; d = readdir(dp))
243 if (d->d_fileno == st_cur.st_ino)
244 break;
245 }
246 else {
247 /*
248 * Parent has a different device. This is a mount point so we
249 * need to stat every member
250 */
251 for (d = readdir(dp); d != NULL; d = readdir(dp)) {
252 if (ISDOT(d->d_name) || ISDOTDOT(d->d_name))
253 continue;
254 (void) strcpy(cur_name_add, d->d_name);
255 if (lstat(nextpathptr, &st_next) == -1) {
256 (void) sprintf(pathname, "getwd: Cannot stat \"%s\" (%s)",
257 d->d_name, strerror(errno));
258 (void) closedir(dp);
259 return (NULL);
260 }
261 /* check if we found it yet */
262 if (st_next.st_ino == st_cur.st_ino &&
263 DEV_DEV_COMPARE(st_next.st_dev, st_cur.st_dev))
264 break;
265 }
266 }
267 if (d == NULL) {
268 (void) sprintf(pathname, "getwd: Cannot find \".\" in \"..\"");
269 (void) closedir(dp);
270 return (NULL);
271 }
272 st_cur = st_dotdot;
273 pathptr = strrcpy(pathptr, d->d_name);
274 pathptr = strrcpy(pathptr, "/");
275 nextpathptr = strrcpy(nextpathptr, "../");
276 (void) closedir(dp);
277 *cur_name_add = '\0';
278 }
279 } /* end getwd */
280
281
282 char *sys_siglist[] = {
283 "Signal 0",
284 "Hangup", /* SIGHUP */
285 "Interrupt", /* SIGINT */
286 "Quit", /* SIGQUIT */
287 "Illegal instruction", /* SIGILL */
288 "Trace/BPT trap", /* SIGTRAP */
289 "IOT trap", /* SIGIOT */
290 "EMT trap", /* SIGEMT */
291 "Floating point exception", /* SIGFPE */
292 "Killed", /* SIGKILL */
293 "Bus error", /* SIGBUS */
294 "Segmentation fault", /* SIGSEGV */
295 "Bad system call", /* SIGSYS */
296 "Broken pipe", /* SIGPIPE */
297 "Alarm clock", /* SIGALRM */
298 "Terminated", /* SIGTERM */
299 "User defined signal 1", /* SIGUSR1 */
300 "User defined signal 2", /* SIGUSR2 */
301 "Child exited", /* SIGCLD */
302 "Power-fail restart", /* SIGPWR */
303 "Virtual timer expired", /* SIGVTALRM */
304 "Profiling timer expired", /* SIGPROF */
305 "I/O possible", /* SIGIO */
306 "Window size changes", /* SIGWINDOW */
307 "Stopped (signal)", /* SIGSTOP */
308 "Stopped", /* SIGTSTP */
309 "Continued", /* SIGCONT */
310 "Stopped (tty input)", /* SIGTTIN */
311 "Stopped (tty output)", /* SIGTTOU */
312 "Urgent I/O condition", /* SIGURG */
313 "Remote lock lost (NFS)", /* SIGLOST */
314 "Signal 31", /* reserved */
315 "DIL signal" /* SIGDIL */
316 };
317
318 int
319 utimes(file, tvp)
320 char *file;
321 struct timeval tvp[2];
322 {
323 struct utimbuf t;
324
325 t.actime = tvp[0].tv_sec;
326 t.modtime = tvp[1].tv_sec;
327 return(utime(file, &t));
328 }
329
330
331 #endif /* __hpux */
332
333 #if defined(sun) && defined(__svr4__)
334 #include <signal.h>
335
336 /* turn into bsd signals */
337 void (*
338 signal(s, a)) ()
339 int s;
340 void (*a)();
341 {
342 struct sigaction sa, osa;
343
344 sa.sa_handler = a;
345 sigemptyset(&sa.sa_mask);
346 sa.sa_flags = SA_RESTART;
347
348 if (sigaction(s, &sa, &osa) == -1)
349 return SIG_ERR;
350 else
351 return osa.sa_handler;
352 }
353
354 #endif
355
356 #ifndef BSD4_4
357 #ifdef __STDC__
358 #include <stdarg.h>
359 #else
360 #include <varargs.h>
361 #endif
362
363 #ifdef _IOSTRG
364 #define STRFLAG (_IOSTRG|_IOWRT) /* no _IOWRT: avoid stdio bug */
365 #else
366 #if 0
367 #define STRFLAG (_IOREAD) /* XXX: Assume svr4 stdio */
368 #endif
369 #endif
370
371 int
372 vsnprintf(s, n, fmt, args)
373 char *s;
374 size_t n;
375 const char *fmt;
376 va_list args;
377 {
378 FILE fakebuf;
379
380 #ifdef STRFLAG
381 fakebuf._flag = STRFLAG;
382 /*
383 * Some os's are char * _ptr, others are unsigned char *_ptr...
384 * We cast to void * to make everyone happy.
385 */
386 fakebuf._ptr = (void *) s;
387 fakebuf._cnt = n-1;
388 fakebuf._file = -1;
389 _doprnt(fmt, args, &fakebuf);
390 fakebuf._cnt++;
391 putc('\0', &fakebuf);
392 if (fakebuf._cnt<0)
393 fakebuf._cnt = 0;
394 return (n-fakebuf._cnt-1);
395 #else
396 (void) vsprintf(s, fmt, args);
397 return strlen(s);
398 #endif
399 }
400
401 int
402 #ifdef __STDC__
403 snprintf(char *s, size_t n, const char *fmt, ...)
404 #else
405 snprintf(va_alist)
406 va_dcl
407 #endif
408 {
409 va_list ap;
410 int rv;
411 #ifdef __STDC__
412 va_start(ap, fmt);
413 #else
414 char *s;
415 size_t n;
416 const char *fmt;
417
418 va_start(ap);
419
420 s = va_arg(ap, char *);
421 n = va_arg(ap, size_t);
422 fmt = va_arg(ap, const char *);
423 #endif
424 rv = vsnprintf(s, n, fmt, ap);
425 va_end(ap);
426 return rv;
427 }
428 #endif
429