util.c revision 1.8 1 /* $NetBSD: util.c,v 1.8 1996/11/06 17:59:28 christos Exp $ */
2
3 /*
4 * Missing stuff from OS's
5 */
6
7 #ifndef lint
8 static char rcsid[] = "$NetBSD: util.c,v 1.8 1996/11/06 17:59:28 christos Exp $";
9 #endif
10
11 #include <stdio.h>
12 #include "make.h"
13
14 #if !__STDC__
15 # ifndef const
16 # define const
17 # endif
18 #endif
19
20 #ifdef sun
21
22
23
24 extern int errno, sys_nerr;
25 extern char *sys_errlist[];
26
27 char *
28 strerror(e)
29 int e;
30 {
31 static char buf[100];
32 if (e < 0 || e >= sys_nerr) {
33 sprintf(buf, "Unknown error %d", e);
34 return buf;
35 }
36 else
37 return sys_errlist[e];
38 }
39 #endif
40
41 #ifdef ultrix
42 #include <string.h>
43
44 /* strdup
45 *
46 * Make a duplicate of a string.
47 * For systems which lack this function.
48 */
49 char *
50 strdup(str)
51 const char *str;
52 {
53 size_t len;
54
55 if (str == NULL)
56 return NULL;
57 len = strlen(str) + 1;
58 if ((p = malloc(len)) == NULL)
59 return NULL;
60
61 return memcpy(p, str, len);
62 }
63
64 #endif
65
66 #if defined(sun) || defined(__hpux) || defined(__sgi)
67
68 int
69 setenv(name, value, dum)
70 const char *name;
71 const char *value;
72 int dum;
73 {
74 register char *p;
75 int len = strlen(name) + strlen(value) + 2; /* = \0 */
76 char *ptr = (char*) malloc(len);
77
78 (void) dum;
79
80 if (ptr == NULL)
81 return -1;
82
83 p = ptr;
84
85 while (*name)
86 *p++ = *name++;
87
88 *p++ = '=';
89
90 while (*value)
91 *p++ = *value++;
92
93 *p = '\0';
94
95 len = putenv(ptr);
96 /* free(ptr); */
97 return len;
98 }
99 #endif
100
101 #ifdef __hpux
102 #include <sys/types.h>
103 #include <sys/param.h>
104 #include <sys/syscall.h>
105 #include <sys/signal.h>
106 #include <sys/stat.h>
107 #include <stdio.h>
108 #include <dirent.h>
109 #include <sys/time.h>
110 #include <time.h>
111 #include <unistd.h>
112
113
114 int
115 killpg(pid, sig)
116 int pid, sig;
117 {
118 return kill(-pid, sig);
119 }
120
121 void
122 srandom(seed)
123 long seed;
124 {
125 srand48(seed);
126 }
127
128 long
129 random()
130 {
131 return lrand48();
132 }
133
134 /* turn into bsd signals */
135 void (*
136 signal(s, a)) ()
137 int s;
138 void (*a)();
139 {
140 struct sigvec osv, sv;
141
142 (void) sigvector(s, (struct sigvec *) 0, &osv);
143 sv = osv;
144 sv.sv_handler = a;
145 #ifdef SV_BSDSIG
146 sv.sv_flags = SV_BSDSIG;
147 #endif
148
149 if (sigvector(s, &sv, (struct sigvec *) 0) == -1)
150 return (BADSIG);
151 return (osv.sv_handler);
152 }
153
154 #if !defined(BSD) && !defined(d_fileno)
155 # define d_fileno d_ino
156 #endif
157
158 #ifndef DEV_DEV_COMPARE
159 # define DEV_DEV_COMPARE(a, b) ((a) == (b))
160 #endif
161 #define ISDOT(c) ((c)[0] == '.' && (((c)[1] == '\0') || ((c)[1] == '/')))
162 #define ISDOTDOT(c) ((c)[0] == '.' && ISDOT(&((c)[1])))
163
164
165 /* strrcpy():
166 * Like strcpy, going backwards and returning the new pointer
167 */
168 static char *
169 strrcpy(ptr, str)
170 register char *ptr, *str;
171 {
172 register int len = strlen(str);
173
174 while (len)
175 *--ptr = str[--len];
176
177 return (ptr);
178 } /* end strrcpy */
179
180
181 char *
182 getwd(pathname)
183 char *pathname;
184 {
185 DIR *dp;
186 struct dirent *d;
187 extern int errno;
188
189 struct stat st_root, st_cur, st_next, st_dotdot;
190 char pathbuf[MAXPATHLEN], nextpathbuf[MAXPATHLEN * 2];
191 char *pathptr, *nextpathptr, *cur_name_add;
192
193 /* find the inode of root */
194 if (stat("/", &st_root) == -1) {
195 (void) sprintf(pathname,
196 "getwd: Cannot stat \"/\" (%s)", strerror(errno));
197 return (NULL);
198 }
199 pathbuf[MAXPATHLEN - 1] = '\0';
200 pathptr = &pathbuf[MAXPATHLEN - 1];
201 nextpathbuf[MAXPATHLEN - 1] = '\0';
202 cur_name_add = nextpathptr = &nextpathbuf[MAXPATHLEN - 1];
203
204 /* find the inode of the current directory */
205 if (lstat(".", &st_cur) == -1) {
206 (void) sprintf(pathname,
207 "getwd: Cannot stat \".\" (%s)", strerror(errno));
208 return (NULL);
209 }
210 nextpathptr = strrcpy(nextpathptr, "../");
211
212 /* Descend to root */
213 for (;;) {
214
215 /* look if we found root yet */
216 if (st_cur.st_ino == st_root.st_ino &&
217 DEV_DEV_COMPARE(st_cur.st_dev, st_root.st_dev)) {
218 (void) strcpy(pathname, *pathptr != '/' ? "/" : pathptr);
219 return (pathname);
220 }
221
222 /* open the parent directory */
223 if (stat(nextpathptr, &st_dotdot) == -1) {
224 (void) sprintf(pathname,
225 "getwd: Cannot stat directory \"%s\" (%s)",
226 nextpathptr, strerror(errno));
227 return (NULL);
228 }
229 if ((dp = opendir(nextpathptr)) == NULL) {
230 (void) sprintf(pathname,
231 "getwd: Cannot open directory \"%s\" (%s)",
232 nextpathptr, strerror(errno));
233 return (NULL);
234 }
235
236 /* look in the parent for the entry with the same inode */
237 if (DEV_DEV_COMPARE(st_dotdot.st_dev, st_cur.st_dev)) {
238 /* Parent has same device. No need to stat every member */
239 for (d = readdir(dp); d != NULL; d = readdir(dp))
240 if (d->d_fileno == st_cur.st_ino)
241 break;
242 }
243 else {
244 /*
245 * Parent has a different device. This is a mount point so we
246 * need to stat every member
247 */
248 for (d = readdir(dp); d != NULL; d = readdir(dp)) {
249 if (ISDOT(d->d_name) || ISDOTDOT(d->d_name))
250 continue;
251 (void) strcpy(cur_name_add, d->d_name);
252 if (lstat(nextpathptr, &st_next) == -1) {
253 (void) sprintf(pathname, "getwd: Cannot stat \"%s\" (%s)",
254 d->d_name, strerror(errno));
255 (void) closedir(dp);
256 return (NULL);
257 }
258 /* check if we found it yet */
259 if (st_next.st_ino == st_cur.st_ino &&
260 DEV_DEV_COMPARE(st_next.st_dev, st_cur.st_dev))
261 break;
262 }
263 }
264 if (d == NULL) {
265 (void) sprintf(pathname, "getwd: Cannot find \".\" in \"..\"");
266 (void) closedir(dp);
267 return (NULL);
268 }
269 st_cur = st_dotdot;
270 pathptr = strrcpy(pathptr, d->d_name);
271 pathptr = strrcpy(pathptr, "/");
272 nextpathptr = strrcpy(nextpathptr, "../");
273 (void) closedir(dp);
274 *cur_name_add = '\0';
275 }
276 } /* end getwd */
277
278
279 char *sys_siglist[] = {
280 "Signal 0",
281 "Hangup", /* SIGHUP */
282 "Interrupt", /* SIGINT */
283 "Quit", /* SIGQUIT */
284 "Illegal instruction", /* SIGILL */
285 "Trace/BPT trap", /* SIGTRAP */
286 "IOT trap", /* SIGIOT */
287 "EMT trap", /* SIGEMT */
288 "Floating point exception", /* SIGFPE */
289 "Killed", /* SIGKILL */
290 "Bus error", /* SIGBUS */
291 "Segmentation fault", /* SIGSEGV */
292 "Bad system call", /* SIGSYS */
293 "Broken pipe", /* SIGPIPE */
294 "Alarm clock", /* SIGALRM */
295 "Terminated", /* SIGTERM */
296 "User defined signal 1", /* SIGUSR1 */
297 "User defined signal 2", /* SIGUSR2 */
298 "Child exited", /* SIGCLD */
299 "Power-fail restart", /* SIGPWR */
300 "Virtual timer expired", /* SIGVTALRM */
301 "Profiling timer expired", /* SIGPROF */
302 "I/O possible", /* SIGIO */
303 "Window size changes", /* SIGWINDOW */
304 "Stopped (signal)", /* SIGSTOP */
305 "Stopped", /* SIGTSTP */
306 "Continued", /* SIGCONT */
307 "Stopped (tty input)", /* SIGTTIN */
308 "Stopped (tty output)", /* SIGTTOU */
309 "Urgent I/O condition", /* SIGURG */
310 "Remote lock lost (NFS)", /* SIGLOST */
311 "Signal 31", /* reserved */
312 "DIL signal" /* SIGDIL */
313 };
314
315 int
316 utimes(file, tvp)
317 char *file;
318 struct timeval tvp[2];
319 {
320 struct utimbuf t;
321
322 t.actime = tvp[0].tv_sec;
323 t.modtime = tvp[1].tv_sec;
324 return(utime(file, &t));
325 }
326
327
328 #endif /* __hpux */
329
330 #if defined(sun) && defined(__svr4__)
331 #include <signal.h>
332
333 /* turn into bsd signals */
334 void (*
335 signal(s, a)) ()
336 int s;
337 void (*a)();
338 {
339 struct sigaction sa, osa;
340
341 sa.sa_handler = a;
342 sigemptyset(&sa.sa_mask);
343 sa.sa_flags = SA_RESTART;
344
345 if (sigaction(s, &sa, &osa) == -1)
346 return SIG_ERR;
347 else
348 return osa.sa_handler;
349 }
350
351 #endif
352