source: trunk/src/kmk/util.c@ 118

Last change on this file since 118 was 51, checked in by bird, 23 years ago

kMk and porting to kLib.
  • Property svn:eol-style set to native
  • Property svn:keywords set to Author Date Id Revision
File size: 8.4 KB
Line 
1/*
2 * Missing stuff from OS's
3 */
4
5#ifndef lint
6static char rcsid[] = "$FreeBSD: src/usr.bin/make/util.c,v 1.5.2.2 2001/02/13 03:13:58 will Exp $";
7#define KLIBFILEDEF rcsid
8#endif
9
10#include <stdio.h>
11#include <errno.h>
12#include "make.h"
13
14#if !__STDC__
15# ifndef const
16# define const
17# endif
18#endif
19
20#ifdef sun
21extern int errno, sys_nerr;
22extern char *sys_errlist[];
23
24char *
25strerror(e)
26 int e;
27{
28 static char buf[100];
29 if (e < 0 || e >= sys_nerr) {
30 sprintf(buf, "Unknown error %d", e);
31 return buf;
32 }
33 else
34 return sys_errlist[e];
35}
36#endif
37
38#ifdef ultrix
39#include <string.h>
40
41/* strdup
42 *
43 * Make a duplicate of a string.
44 * For systems which lack this function.
45 */
46char *
47strdup(str)
48 const char *str;
49{
50 size_t len;
51
52 if (str == NULL)
53 return NULL;
54 len = strlen(str) + 1;
55 if ((p = emalloc(len)) == NULL)
56 return NULL;
57
58 return memcpy(p, str, len);
59}
60
61#endif
62
63#ifndef USE_KLIB
64#if defined(sun) || defined(__hpux) || defined(__sgi) || defined(__EMX__)
65
66int
67setenv(name, value, dum)
68 const char *name;
69 const char *value;
70 int dum;
71{
72 register char *p;
73 int len = strlen(name) + strlen(value) + 2; /* = \0 */
74 char *ptr = (char*) emalloc(len);
75
76 (void) dum;
77
78 if (ptr == NULL)
79 return -1;
80
81 p = ptr;
82
83 while (*name)
84 *p++ = *name++;
85
86 *p++ = '=';
87
88 while (*value)
89 *p++ = *value++;
90
91 *p = '\0';
92
93 len = putenv(ptr);
94 efree(ptr);
95 return len;
96}
97#endif
98#endif
99
100#ifdef __hpux
101#include <sys/types.h>
102#include <sys/param.h>
103#include <sys/syscall.h>
104#include <sys/signal.h>
105#include <sys/stat.h>
106#include <stdio.h>
107#include <dirent.h>
108#include <sys/time.h>
109#include <time.h>
110#include <unistd.h>
111
112
113int
114killpg(pid, sig)
115 int pid, sig;
116{
117 return kill(-pid, sig);
118}
119
120void
121srandom(seed)
122 long seed;
123{
124 srand48(seed);
125}
126
127long
128random()
129{
130 return lrand48();
131}
132
133/* turn into bsd signals */
134void (*
135signal(s, a)) ()
136 int s;
137 void (*a)();
138{
139 struct sigvec osv, sv;
140
141 (void) sigvector(s, (struct sigvec *) 0, &osv);
142 sv = osv;
143 sv.sv_handler = a;
144#ifdef SV_BSDSIG
145 sv.sv_flags = SV_BSDSIG;
146#endif
147
148 if (sigvector(s, &sv, (struct sigvec *) 0) == -1)
149 return (BADSIG);
150 return (osv.sv_handler);
151}
152
153#if !defined(BSD) && !defined(d_fileno)
154# define d_fileno d_ino
155#endif
156
157#ifndef DEV_DEV_COMPARE
158# define DEV_DEV_COMPARE(a, b) ((a) == (b))
159#endif
160
161/* strrcpy():
162 * Like strcpy, going backwards and returning the new pointer
163 */
164static char *
165strrcpy(ptr, str)
166 register char *ptr, *str;
167{
168 register int len = strlen(str);
169
170 while (len)
171 *--ptr = str[--len];
172
173 return (ptr);
174} /* end strrcpy */
175
176
177char *
178getwd(pathname)
179 char *pathname;
180{
181 DIR *dp;
182 struct dirent *d;
183
184 struct stat st_root, st_cur, st_next, st_dotdot;
185 char pathbuf[MAXPATHLEN], nextpathbuf[MAXPATHLEN * 2];
186 char *pathptr, *nextpathptr, *cur_name_add;
187
188 /* find the inode of root */
189 if (stat("/", &st_root) == -1) {
190 (void) sprintf(pathname,
191 "getwd: Cannot stat \"/\" (%s)", strerror(errno));
192 return (NULL);
193 }
194 pathbuf[MAXPATHLEN - 1] = '\0';
195 pathptr = &pathbuf[MAXPATHLEN - 1];
196 nextpathbuf[MAXPATHLEN - 1] = '\0';
197 cur_name_add = nextpathptr = &nextpathbuf[MAXPATHLEN - 1];
198
199 /* find the inode of the current directory */
200 if (lstat(".", &st_cur) == -1) {
201 (void) sprintf(pathname,
202 "getwd: Cannot stat \".\" (%s)", strerror(errno));
203 return (NULL);
204 }
205 nextpathptr = strrcpy(nextpathptr, "../");
206
207 /* Descend to root */
208 for (;;) {
209
210 /* look if we found root yet */
211 if (st_cur.st_ino == st_root.st_ino &&
212 DEV_DEV_COMPARE(st_cur.st_dev, st_root.st_dev)) {
213 (void) strcpy(pathname, *pathptr != '/' ? "/" : pathptr);
214 return (pathname);
215 }
216
217 /* open the parent directory */
218 if (stat(nextpathptr, &st_dotdot) == -1) {
219 snprintf(pathname, sizeof(pathname),
220 "getwd: Cannot stat directory \"%s\" (%s)",
221 nextpathptr, strerror(errno));
222 return (NULL);
223 }
224 if ((dp = opendir(nextpathptr)) == NULL) {
225 snprintf(pathname, sizeof(pathname),
226 "getwd: Cannot open directory \"%s\" (%s)",
227 nextpathptr, strerror(errno));
228 return (NULL);
229 }
230
231 /* look in the parent for the entry with the same inode */
232 if (DEV_DEV_COMPARE(st_dotdot.st_dev, st_cur.st_dev)) {
233 /* Parent has same device. No need to stat every member */
234 for (d = readdir(dp); d != NULL; d = readdir(dp))
235 if (d->d_fileno == st_cur.st_ino)
236 break;
237 }
238 else {
239 /*
240 * Parent has a different device. This is a mount point so we
241 * need to stat every member
242 */
243 for (d = readdir(dp); d != NULL; d = readdir(dp)) {
244 if (ISDOT(d->d_name) || ISDOTDOT(d->d_name))
245 continue;
246 (void) strcpy(cur_name_add, d->d_name);
247 if (lstat(nextpathptr, &st_next) == -1) {
248 snprintf(pathname, sizeof(pathname), "getwd: Cannot stat \"%s\" (%s)",
249 d->d_name, strerror(errno));
250 (void) closedir(dp);
251 return (NULL);
252 }
253 /* check if we found it yet */
254 if (st_next.st_ino == st_cur.st_ino &&
255 DEV_DEV_COMPARE(st_next.st_dev, st_cur.st_dev))
256 break;
257 }
258 }
259 if (d == NULL) {
260 (void) sprintf(pathname, "getwd: Cannot find \".\" in \"..\"");
261 (void) closedir(dp);
262 return (NULL);
263 }
264 st_cur = st_dotdot;
265 pathptr = strrcpy(pathptr, d->d_name);
266 pathptr = strrcpy(pathptr, "/");
267 nextpathptr = strrcpy(nextpathptr, "../");
268 (void) closedir(dp);
269 *cur_name_add = '\0';
270 }
271} /* end getwd */
272
273
274char *sys_siglist[] = {
275 "Signal 0",
276 "Hangup", /* SIGHUP */
277 "Interrupt", /* SIGINT */
278 "Quit", /* SIGQUIT */
279 "Illegal instruction", /* SIGILL */
280 "Trace/BPT trap", /* SIGTRAP */
281 "IOT trap", /* SIGIOT */
282 "EMT trap", /* SIGEMT */
283 "Floating point exception", /* SIGFPE */
284 "Killed", /* SIGKILL */
285 "Bus error", /* SIGBUS */
286 "Segmentation fault", /* SIGSEGV */
287 "Bad system call", /* SIGSYS */
288 "Broken pipe", /* SIGPIPE */
289 "Alarm clock", /* SIGALRM */
290 "Terminated", /* SIGTERM */
291 "User defined signal 1", /* SIGUSR1 */
292 "User defined signal 2", /* SIGUSR2 */
293 "Child exited", /* SIGCLD */
294 "Power-fail restart", /* SIGPWR */
295 "Virtual timer expired", /* SIGVTALRM */
296 "Profiling timer expired", /* SIGPROF */
297 "I/O possible", /* SIGIO */
298 "Window size changes", /* SIGWINDOW */
299 "Stopped (signal)", /* SIGSTOP */
300 "Stopped", /* SIGTSTP */
301 "Continued", /* SIGCONT */
302 "Stopped (tty input)", /* SIGTTIN */
303 "Stopped (tty output)", /* SIGTTOU */
304 "Urgent I/O condition", /* SIGURG */
305 "Remote lock lost (NFS)", /* SIGLOST */
306 "Signal 31", /* reserved */
307 "DIL signal" /* SIGDIL */
308};
309
310int
311utimes(file, tvp)
312 char *file;
313 struct timeval tvp[2];
314{
315 struct utimbuf t;
316
317 t.actime = tvp[0].tv_sec;
318 t.modtime = tvp[1].tv_sec;
319 return(utime(file, &t));
320}
321
322
323#endif /* __hpux */
324
325#if defined(sun) && defined(__svr4__)
326#include <signal.h>
327
328/* turn into bsd signals */
329void (*
330signal(s, a)) ()
331 int s;
332 void (*a)();
333{
334 struct sigaction sa, osa;
335
336 sa.sa_handler = a;
337 sigemptyset(&sa.sa_mask);
338 sa.sa_flags = SA_RESTART;
339
340 if (sigaction(s, &sa, &osa) == -1)
341 return SIG_ERR;
342 else
343 return osa.sa_handler;
344}
345
346#endif
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