util.c revision 1.11 1 /* $NetBSD: util.c,v 1.11 1997/06/07 16:42:31 christos Exp $ */
2
3 /*
4 * Missing stuff from OS's
5 */
6
7 #ifndef lint
8 static char rcsid[] = "$NetBSD: util.c,v 1.11 1997/06/07 16:42:31 christos Exp $";
9 #endif
10
11 #include <stdio.h>
12 #include "make.h"
13 #include <sys/param.h>
14
15 #if !__STDC__
16 # ifndef const
17 # define const
18 # endif
19 #endif
20
21 #ifdef sun
22
23
24
25 extern int errno, sys_nerr;
26 extern char *sys_errlist[];
27
28 char *
29 strerror(e)
30 int e;
31 {
32 static char buf[100];
33 if (e < 0 || e >= sys_nerr) {
34 sprintf(buf, "Unknown error %d", e);
35 return buf;
36 }
37 else
38 return sys_errlist[e];
39 }
40 #endif
41
42 #ifdef ultrix
43 #include <string.h>
44
45 /* strdup
46 *
47 * Make a duplicate of a string.
48 * For systems which lack this function.
49 */
50 char *
51 strdup(str)
52 const char *str;
53 {
54 size_t len;
55 char *p;
56
57 if (str == NULL)
58 return NULL;
59 len = strlen(str) + 1;
60 if ((p = malloc(len)) == NULL)
61 return NULL;
62
63 return memcpy(p, str, len);
64 }
65
66 #endif
67
68 #if defined(sun) || defined(__hpux) || defined(__sgi)
69
70 int
71 setenv(name, value, dum)
72 const char *name;
73 const char *value;
74 int dum;
75 {
76 register char *p;
77 int len = strlen(name) + strlen(value) + 2; /* = \0 */
78 char *ptr = (char*) malloc(len);
79
80 (void) dum;
81
82 if (ptr == NULL)
83 return -1;
84
85 p = ptr;
86
87 while (*name)
88 *p++ = *name++;
89
90 *p++ = '=';
91
92 while (*value)
93 *p++ = *value++;
94
95 *p = '\0';
96
97 len = putenv(ptr);
98 /* free(ptr); */
99 return len;
100 }
101 #endif
102
103 #ifdef __hpux
104 #include <sys/types.h>
105 #include <sys/param.h>
106 #include <sys/syscall.h>
107 #include <sys/signal.h>
108 #include <sys/stat.h>
109 #include <stdio.h>
110 #include <dirent.h>
111 #include <sys/time.h>
112 #include <time.h>
113 #include <unistd.h>
114
115
116 int
117 killpg(pid, sig)
118 int pid, sig;
119 {
120 return kill(-pid, sig);
121 }
122
123 void
124 srandom(seed)
125 long seed;
126 {
127 srand48(seed);
128 }
129
130 long
131 random()
132 {
133 return lrand48();
134 }
135
136 /* turn into bsd signals */
137 void (*
138 signal(s, a)) ()
139 int s;
140 void (*a)();
141 {
142 struct sigvec osv, sv;
143
144 (void) sigvector(s, (struct sigvec *) 0, &osv);
145 sv = osv;
146 sv.sv_handler = a;
147 #ifdef SV_BSDSIG
148 sv.sv_flags = SV_BSDSIG;
149 #endif
150
151 if (sigvector(s, &sv, (struct sigvec *) 0) == -1)
152 return (BADSIG);
153 return (osv.sv_handler);
154 }
155
156 #if !defined(BSD) && !defined(d_fileno)
157 # define d_fileno d_ino
158 #endif
159
160 #ifndef DEV_DEV_COMPARE
161 # define DEV_DEV_COMPARE(a, b) ((a) == (b))
162 #endif
163 #define ISDOT(c) ((c)[0] == '.' && (((c)[1] == '\0') || ((c)[1] == '/')))
164 #define ISDOTDOT(c) ((c)[0] == '.' && ISDOT(&((c)[1])))
165
166
167 /* strrcpy():
168 * Like strcpy, going backwards and returning the new pointer
169 */
170 static char *
171 strrcpy(ptr, str)
172 register char *ptr, *str;
173 {
174 register int len = strlen(str);
175
176 while (len)
177 *--ptr = str[--len];
178
179 return (ptr);
180 } /* end strrcpy */
181
182
183 char *
184 getwd(pathname)
185 char *pathname;
186 {
187 DIR *dp;
188 struct dirent *d;
189 extern int errno;
190
191 struct stat st_root, st_cur, st_next, st_dotdot;
192 char pathbuf[MAXPATHLEN], nextpathbuf[MAXPATHLEN * 2];
193 char *pathptr, *nextpathptr, *cur_name_add;
194
195 /* find the inode of root */
196 if (stat("/", &st_root) == -1) {
197 (void) sprintf(pathname,
198 "getwd: Cannot stat \"/\" (%s)", strerror(errno));
199 return (NULL);
200 }
201 pathbuf[MAXPATHLEN - 1] = '\0';
202 pathptr = &pathbuf[MAXPATHLEN - 1];
203 nextpathbuf[MAXPATHLEN - 1] = '\0';
204 cur_name_add = nextpathptr = &nextpathbuf[MAXPATHLEN - 1];
205
206 /* find the inode of the current directory */
207 if (lstat(".", &st_cur) == -1) {
208 (void) sprintf(pathname,
209 "getwd: Cannot stat \".\" (%s)", strerror(errno));
210 return (NULL);
211 }
212 nextpathptr = strrcpy(nextpathptr, "../");
213
214 /* Descend to root */
215 for (;;) {
216
217 /* look if we found root yet */
218 if (st_cur.st_ino == st_root.st_ino &&
219 DEV_DEV_COMPARE(st_cur.st_dev, st_root.st_dev)) {
220 (void) strcpy(pathname, *pathptr != '/' ? "/" : pathptr);
221 return (pathname);
222 }
223
224 /* open the parent directory */
225 if (stat(nextpathptr, &st_dotdot) == -1) {
226 (void) sprintf(pathname,
227 "getwd: Cannot stat directory \"%s\" (%s)",
228 nextpathptr, strerror(errno));
229 return (NULL);
230 }
231 if ((dp = opendir(nextpathptr)) == NULL) {
232 (void) sprintf(pathname,
233 "getwd: Cannot open directory \"%s\" (%s)",
234 nextpathptr, strerror(errno));
235 return (NULL);
236 }
237
238 /* look in the parent for the entry with the same inode */
239 if (DEV_DEV_COMPARE(st_dotdot.st_dev, st_cur.st_dev)) {
240 /* Parent has same device. No need to stat every member */
241 for (d = readdir(dp); d != NULL; d = readdir(dp))
242 if (d->d_fileno == st_cur.st_ino)
243 break;
244 }
245 else {
246 /*
247 * Parent has a different device. This is a mount point so we
248 * need to stat every member
249 */
250 for (d = readdir(dp); d != NULL; d = readdir(dp)) {
251 if (ISDOT(d->d_name) || ISDOTDOT(d->d_name))
252 continue;
253 (void) strcpy(cur_name_add, d->d_name);
254 if (lstat(nextpathptr, &st_next) == -1) {
255 (void) sprintf(pathname, "getwd: Cannot stat \"%s\" (%s)",
256 d->d_name, strerror(errno));
257 (void) closedir(dp);
258 return (NULL);
259 }
260 /* check if we found it yet */
261 if (st_next.st_ino == st_cur.st_ino &&
262 DEV_DEV_COMPARE(st_next.st_dev, st_cur.st_dev))
263 break;
264 }
265 }
266 if (d == NULL) {
267 (void) sprintf(pathname, "getwd: Cannot find \".\" in \"..\"");
268 (void) closedir(dp);
269 return (NULL);
270 }
271 st_cur = st_dotdot;
272 pathptr = strrcpy(pathptr, d->d_name);
273 pathptr = strrcpy(pathptr, "/");
274 nextpathptr = strrcpy(nextpathptr, "../");
275 (void) closedir(dp);
276 *cur_name_add = '\0';
277 }
278 } /* end getwd */
279
280
281 char *sys_siglist[] = {
282 "Signal 0",
283 "Hangup", /* SIGHUP */
284 "Interrupt", /* SIGINT */
285 "Quit", /* SIGQUIT */
286 "Illegal instruction", /* SIGILL */
287 "Trace/BPT trap", /* SIGTRAP */
288 "IOT trap", /* SIGIOT */
289 "EMT trap", /* SIGEMT */
290 "Floating point exception", /* SIGFPE */
291 "Killed", /* SIGKILL */
292 "Bus error", /* SIGBUS */
293 "Segmentation fault", /* SIGSEGV */
294 "Bad system call", /* SIGSYS */
295 "Broken pipe", /* SIGPIPE */
296 "Alarm clock", /* SIGALRM */
297 "Terminated", /* SIGTERM */
298 "User defined signal 1", /* SIGUSR1 */
299 "User defined signal 2", /* SIGUSR2 */
300 "Child exited", /* SIGCLD */
301 "Power-fail restart", /* SIGPWR */
302 "Virtual timer expired", /* SIGVTALRM */
303 "Profiling timer expired", /* SIGPROF */
304 "I/O possible", /* SIGIO */
305 "Window size changes", /* SIGWINDOW */
306 "Stopped (signal)", /* SIGSTOP */
307 "Stopped", /* SIGTSTP */
308 "Continued", /* SIGCONT */
309 "Stopped (tty input)", /* SIGTTIN */
310 "Stopped (tty output)", /* SIGTTOU */
311 "Urgent I/O condition", /* SIGURG */
312 "Remote lock lost (NFS)", /* SIGLOST */
313 "Signal 31", /* reserved */
314 "DIL signal" /* SIGDIL */
315 };
316
317 int
318 utimes(file, tvp)
319 char *file;
320 struct timeval tvp[2];
321 {
322 struct utimbuf t;
323
324 t.actime = tvp[0].tv_sec;
325 t.modtime = tvp[1].tv_sec;
326 return(utime(file, &t));
327 }
328
329
330 #endif /* __hpux */
331
332 #if defined(sun) && defined(__svr4__)
333 #include <signal.h>
334
335 /* turn into bsd signals */
336 void (*
337 signal(s, a)) ()
338 int s;
339 void (*a)();
340 {
341 struct sigaction sa, osa;
342
343 sa.sa_handler = a;
344 sigemptyset(&sa.sa_mask);
345 sa.sa_flags = SA_RESTART;
346
347 if (sigaction(s, &sa, &osa) == -1)
348 return SIG_ERR;
349 else
350 return osa.sa_handler;
351 }
352
353 #endif
354
355 #ifndef BSD4_4
356 #ifdef __STDC__
357 #include <stdarg.h>
358 #else
359 #include <varargs.h>
360 #endif
361
362 #ifdef _IOSTRG
363 #define STRFLAG (_IOSTRG|_IOWRT) /* no _IOWRT: avoid stdio bug */
364 #else
365 #if 0
366 #define STRFLAG (_IOREAD) /* XXX: Assume svr4 stdio */
367 #endif
368 #endif
369
370 int
371 vsnprintf(s, n, fmt, args)
372 char *s;
373 size_t n;
374 const char *fmt;
375 va_list args;
376 {
377 FILE fakebuf;
378
379 #ifdef STRFLAG
380 fakebuf._flag = STRFLAG;
381 /*
382 * Some os's are char * _ptr, others are unsigned char *_ptr...
383 * We cast to void * to make everyone happy.
384 */
385 fakebuf._ptr = (void *) s;
386 fakebuf._cnt = n-1;
387 fakebuf._file = -1;
388 _doprnt(fmt, args, &fakebuf);
389 fakebuf._cnt++;
390 putc('\0', &fakebuf);
391 if (fakebuf._cnt<0)
392 fakebuf._cnt = 0;
393 return (n-fakebuf._cnt-1);
394 #else
395 (void) sprintf(s, fmt, args);
396 return strlen(s);
397 #endif
398 }
399
400 int
401 #ifdef __STDC__
402 snprintf(char *s, size_t n, const char *fmt, ...)
403 #else
404 snprintf(va_alist)
405 va_dcl
406 #endif
407 {
408 va_list ap;
409 int rv;
410 #ifdef __STDC__
411 va_start(ap, fmt);
412 #else
413 char *s;
414 size_t n;
415 const char *fmt;
416
417 va_start(ap);
418
419 s = va_arg(ap, char *);
420 n = va_arg(ap, size_t);
421 fmt = va_arg(ap, const char *);
422 #endif
423 rv = vsnprintf(s, n, fmt, ap);
424 va_end(ap);
425 return rv;
426 }
427 #endif
428