util.c revision 1.3 1 /*
2 * Missing stuff from OS's
3 *
4 * $Id: util.c,v 1.3 1994/09/23 09:33:23 mycroft Exp $
5 */
6 #include <stdio.h>
7 #include "make.h"
8
9 #if !__STDC__
10 # ifndef const
11 # define const
12 # endif
13 #endif
14
15 #ifdef sun
16
17
18
19 extern int errno, sys_nerr;
20 extern char *sys_errlist[];
21
22 char *
23 strerror(e)
24 int e;
25 {
26 static char buf[100];
27 if (e < 0 || e >= sys_nerr) {
28 sprintf(buf, "Unknown error %d", e);
29 return buf;
30 }
31 else
32 return sys_errlist[e];
33 }
34 #endif
35
36 #if defined(sun) || defined(__hpux)
37
38 int
39 setenv(name, value, dum)
40 const char *name;
41 const char *value;
42 int dum;
43 {
44 register char *p;
45 int len = strlen(name) + strlen(value) + 2; /* = \0 */
46 char *ptr = (char*) malloc(len);
47
48 (void) dum;
49
50 if (ptr == NULL)
51 return -1;
52
53 p = ptr;
54
55 while (*name)
56 *p++ = *name++;
57
58 *p++ = '=';
59
60 while (*value)
61 *p++ = *value++;
62
63 *p = '\0';
64
65 len = putenv(ptr);
66 /* free(ptr); */
67 return len;
68 }
69 #endif
70
71 #ifdef __hpux
72 #include <sys/types.h>
73 #include <sys/param.h>
74 #include <sys/syscall.h>
75 #include <sys/signal.h>
76 #include <sys/stat.h>
77 #include <stdio.h>
78 #include <dirent.h>
79 #include <sys/time.h>
80 #include <time.h>
81 #include <unistd.h>
82
83
84 int
85 killpg(pid, sig)
86 int pid, sig;
87 {
88 return kill(-pid, sig);
89 }
90
91 void
92 srandom(seed)
93 long seed;
94 {
95 srand48(seed);
96 }
97
98 long
99 random()
100 {
101 return lrand48();
102 }
103
104 /* turn into bsd signals */
105 void (*
106 signal(s, a)) ()
107 int s;
108 void (*a)();
109 {
110 struct sigvec osv, sv;
111
112 (void) sigvector(s, (struct sigvec *) 0, &osv);
113 sv = osv;
114 sv.sv_handler = a;
115 #ifdef SV_BSDSIG
116 sv.sv_flags = SV_BSDSIG;
117 #endif
118
119 if (sigvector(s, &sv, (struct sigvec *) 0) == -1)
120 return (BADSIG);
121 return (osv.sv_handler);
122 }
123
124 #if !defined(BSD) && !defined(d_fileno)
125 # define d_fileno d_ino
126 #endif
127
128 #ifndef DEV_DEV_COMPARE
129 # define DEV_DEV_COMPARE(a, b) ((a) == (b))
130 #endif
131 #define ISDOT(c) ((c)[0] == '.' && (((c)[1] == '\0') || ((c)[1] == '/')))
132 #define ISDOTDOT(c) ((c)[0] == '.' && ISDOT(&((c)[1])))
133
134
135 /* strrcpy():
136 * Like strcpy, going backwards and returning the new pointer
137 */
138 static char *
139 strrcpy(ptr, str)
140 register char *ptr, *str;
141 {
142 register int len = strlen(str);
143
144 while (len)
145 *--ptr = str[--len];
146
147 return (ptr);
148 } /* end strrcpy */
149
150
151 char *
152 getwd(pathname)
153 char *pathname;
154 {
155 DIR *dp;
156 struct dirent *d;
157 extern int errno;
158
159 struct stat st_root, st_cur, st_next, st_dotdot;
160 char pathbuf[MAXPATHLEN], nextpathbuf[MAXPATHLEN * 2];
161 char *pathptr, *nextpathptr, *cur_name_add;
162
163 /* find the inode of root */
164 if (stat("/", &st_root) == -1) {
165 (void) sprintf(pathname,
166 "getwd: Cannot stat \"/\" (%s)", strerror(errno));
167 return (NULL);
168 }
169 pathbuf[MAXPATHLEN - 1] = '\0';
170 pathptr = &pathbuf[MAXPATHLEN - 1];
171 nextpathbuf[MAXPATHLEN - 1] = '\0';
172 cur_name_add = nextpathptr = &nextpathbuf[MAXPATHLEN - 1];
173
174 /* find the inode of the current directory */
175 if (lstat(".", &st_cur) == -1) {
176 (void) sprintf(pathname,
177 "getwd: Cannot stat \".\" (%s)", strerror(errno));
178 return (NULL);
179 }
180 nextpathptr = strrcpy(nextpathptr, "../");
181
182 /* Descend to root */
183 for (;;) {
184
185 /* look if we found root yet */
186 if (st_cur.st_ino == st_root.st_ino &&
187 DEV_DEV_COMPARE(st_cur.st_dev, st_root.st_dev)) {
188 (void) strcpy(pathname, *pathptr != '/' ? "/" : pathptr);
189 return (pathname);
190 }
191
192 /* open the parent directory */
193 if (stat(nextpathptr, &st_dotdot) == -1) {
194 (void) sprintf(pathname,
195 "getwd: Cannot stat directory \"%s\" (%s)",
196 nextpathptr, strerror(errno));
197 return (NULL);
198 }
199 if ((dp = opendir(nextpathptr)) == NULL) {
200 (void) sprintf(pathname,
201 "getwd: Cannot open directory \"%s\" (%s)",
202 nextpathptr, strerror(errno));
203 return (NULL);
204 }
205
206 /* look in the parent for the entry with the same inode */
207 if (DEV_DEV_COMPARE(st_dotdot.st_dev, st_cur.st_dev)) {
208 /* Parent has same device. No need to stat every member */
209 for (d = readdir(dp); d != NULL; d = readdir(dp))
210 if (d->d_fileno == st_cur.st_ino)
211 break;
212 }
213 else {
214 /*
215 * Parent has a different device. This is a mount point so we
216 * need to stat every member
217 */
218 for (d = readdir(dp); d != NULL; d = readdir(dp)) {
219 if (ISDOT(d->d_name) || ISDOTDOT(d->d_name))
220 continue;
221 (void) strcpy(cur_name_add, d->d_name);
222 if (lstat(nextpathptr, &st_next) == -1) {
223 (void) sprintf(pathname, "getwd: Cannot stat \"%s\" (%s)",
224 d->d_name, strerror(errno));
225 (void) closedir(dp);
226 return (NULL);
227 }
228 /* check if we found it yet */
229 if (st_next.st_ino == st_cur.st_ino &&
230 DEV_DEV_COMPARE(st_next.st_dev, st_cur.st_dev))
231 break;
232 }
233 }
234 if (d == NULL) {
235 (void) sprintf(pathname, "getwd: Cannot find \".\" in \"..\"");
236 (void) closedir(dp);
237 return (NULL);
238 }
239 st_cur = st_dotdot;
240 pathptr = strrcpy(pathptr, d->d_name);
241 pathptr = strrcpy(pathptr, "/");
242 nextpathptr = strrcpy(nextpathptr, "../");
243 (void) closedir(dp);
244 *cur_name_add = '\0';
245 }
246 } /* end getwd */
247
248
249 char *sys_siglist[] = {
250 "Signal 0",
251 "Hangup", /* SIGHUP */
252 "Interrupt", /* SIGINT */
253 "Quit", /* SIGQUIT */
254 "Illegal instruction", /* SIGILL */
255 "Trace/BPT trap", /* SIGTRAP */
256 "IOT trap", /* SIGIOT */
257 "EMT trap", /* SIGEMT */
258 "Floating point exception", /* SIGFPE */
259 "Killed", /* SIGKILL */
260 "Bus error", /* SIGBUS */
261 "Segmentation fault", /* SIGSEGV */
262 "Bad system call", /* SIGSYS */
263 "Broken pipe", /* SIGPIPE */
264 "Alarm clock", /* SIGALRM */
265 "Terminated", /* SIGTERM */
266 "User defined signal 1", /* SIGUSR1 */
267 "User defined signal 2", /* SIGUSR2 */
268 "Child exited", /* SIGCLD */
269 "Power-fail restart", /* SIGPWR */
270 "Virtual timer expired", /* SIGVTALRM */
271 "Profiling timer expired", /* SIGPROF */
272 "I/O possible", /* SIGIO */
273 "Window size changes", /* SIGWINDOW */
274 "Stopped (signal)", /* SIGSTOP */
275 "Stopped", /* SIGTSTP */
276 "Continued", /* SIGCONT */
277 "Stopped (tty input)", /* SIGTTIN */
278 "Stopped (tty output)", /* SIGTTOU */
279 "Urgent I/O condition", /* SIGURG */
280 "Remote lock lost (NFS)", /* SIGLOST */
281 "Signal 31", /* reserved */
282 "DIL signal" /* SIGDIL */
283 };
284
285 int
286 utimes(file, tvp)
287 char *file;
288 struct timeval tvp[2];
289 {
290 struct utimbuf t;
291
292 t.actime = tvp[0].tv_sec;
293 t.modtime = tvp[1].tv_sec;
294 return(utime(file, &t));
295 }
296
297
298 #endif /* __hpux */
299