util.c revision 1.2
1 /* 2 * Missing stuff from OS's 3 * 4 * $Id: util.c,v 1.2 1994/05/09 06:36:22 glass 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 int 105 setpriority(which, who, niceval) 106 int which, who, niceval; 107 { 108 #ifdef SYS_setpriority 109 return syscall(SYS_setpriority, which, who, niceval); 110 #else 111 extern int errno; 112 errno = ENOSYS; 113 return -1; 114 #endif 115 } 116 117 int 118 setreuid(euid, ruid) 119 int euid, ruid; 120 { 121 return setresuid(euid, ruid, -1); 122 } 123 124 int 125 setregid(egid, rgid) 126 int egid, rgid; 127 { 128 return setresgid(egid, rgid, -1); 129 } 130 131 /* turn into bsd signals */ 132 void (* 133 signal(s, a)) () 134 int s; 135 void (*a)(); 136 { 137 struct sigvec osv, sv; 138 139 (void) sigvector(s, (struct sigvec *) 0, &osv); 140 sv = osv; 141 sv.sv_handler = a; 142 #ifdef SV_BSDSIG 143 sv.sv_flags = SV_BSDSIG; 144 #endif 145 146 if (sigvector(s, &sv, (struct sigvec *) 0) == -1) 147 return (BADSIG); 148 return (osv.sv_handler); 149 } 150 151 #if !defined(BSD) && !defined(d_fileno) 152 # define d_fileno d_ino 153 #endif 154 155 #ifndef DEV_DEV_COMPARE 156 # define DEV_DEV_COMPARE(a, b) ((a) == (b)) 157 #endif 158 #define ISDOT(c) ((c)[0] == '.' && (((c)[1] == '\0') || ((c)[1] == '/'))) 159 #define ISDOTDOT(c) ((c)[0] == '.' && ISDOT(&((c)[1]))) 160 161 162 /* strrcpy(): 163 * Like strcpy, going backwards and returning the new pointer 164 */ 165 static char * 166 strrcpy(ptr, str) 167 register char *ptr, *str; 168 { 169 register int len = strlen(str); 170 171 while (len) 172 *--ptr = str[--len]; 173 174 return (ptr); 175 } /* end strrcpy */ 176 177 178 char * 179 getwd(pathname) 180 char *pathname; 181 { 182 DIR *dp; 183 struct dirent *d; 184 extern int errno; 185 186 struct stat st_root, st_cur, st_next, st_dotdot; 187 char pathbuf[MAXPATHLEN], nextpathbuf[MAXPATHLEN * 2]; 188 char *pathptr, *nextpathptr, *cur_name_add; 189 190 /* find the inode of root */ 191 if (stat("/", &st_root) == -1) { 192 (void) sprintf(pathname, 193 "getwd: Cannot stat \"/\" (%s)", strerror(errno)); 194 return (NULL); 195 } 196 pathbuf[MAXPATHLEN - 1] = '\0'; 197 pathptr = &pathbuf[MAXPATHLEN - 1]; 198 nextpathbuf[MAXPATHLEN - 1] = '\0'; 199 cur_name_add = nextpathptr = &nextpathbuf[MAXPATHLEN - 1]; 200 201 /* find the inode of the current directory */ 202 if (lstat(".", &st_cur) == -1) { 203 (void) sprintf(pathname, 204 "getwd: Cannot stat \".\" (%s)", strerror(errno)); 205 return (NULL); 206 } 207 nextpathptr = strrcpy(nextpathptr, "../"); 208 209 /* Descend to root */ 210 for (;;) { 211 212 /* look if we found root yet */ 213 if (st_cur.st_ino == st_root.st_ino && 214 DEV_DEV_COMPARE(st_cur.st_dev, st_root.st_dev)) { 215 (void) strcpy(pathname, *pathptr != '/' ? "/" : pathptr); 216 return (pathname); 217 } 218 219 /* open the parent directory */ 220 if (stat(nextpathptr, &st_dotdot) == -1) { 221 (void) sprintf(pathname, 222 "getwd: Cannot stat directory \"%s\" (%s)", 223 nextpathptr, strerror(errno)); 224 return (NULL); 225 } 226 if ((dp = opendir(nextpathptr)) == NULL) { 227 (void) sprintf(pathname, 228 "getwd: Cannot open directory \"%s\" (%s)", 229 nextpathptr, strerror(errno)); 230 return (NULL); 231 } 232 233 /* look in the parent for the entry with the same inode */ 234 if (DEV_DEV_COMPARE(st_dotdot.st_dev, st_cur.st_dev)) { 235 /* Parent has same device. No need to stat every member */ 236 for (d = readdir(dp); d != NULL; d = readdir(dp)) 237 if (d->d_fileno == st_cur.st_ino) 238 break; 239 } 240 else { 241 /* 242 * Parent has a different device. This is a mount point so we 243 * need to stat every member 244 */ 245 for (d = readdir(dp); d != NULL; d = readdir(dp)) { 246 if (ISDOT(d->d_name) || ISDOTDOT(d->d_name)) 247 continue; 248 (void) strcpy(cur_name_add, d->d_name); 249 if (lstat(nextpathptr, &st_next) == -1) { 250 (void) sprintf(pathname, "getwd: Cannot stat \"%s\" (%s)", 251 d->d_name, strerror(errno)); 252 (void) closedir(dp); 253 return (NULL); 254 } 255 /* check if we found it yet */ 256 if (st_next.st_ino == st_cur.st_ino && 257 DEV_DEV_COMPARE(st_next.st_dev, st_cur.st_dev)) 258 break; 259 } 260 } 261 if (d == NULL) { 262 (void) sprintf(pathname, "getwd: Cannot find \".\" in \"..\""); 263 (void) closedir(dp); 264 return (NULL); 265 } 266 st_cur = st_dotdot; 267 pathptr = strrcpy(pathptr, d->d_name); 268 pathptr = strrcpy(pathptr, "/"); 269 nextpathptr = strrcpy(nextpathptr, "../"); 270 (void) closedir(dp); 271 *cur_name_add = '\0'; 272 } 273 } /* end getwd */ 274 275 276 char *sys_siglist[] = { 277 "Signal 0", 278 "Hangup", /* SIGHUP */ 279 "Interrupt", /* SIGINT */ 280 "Quit", /* SIGQUIT */ 281 "Illegal instruction", /* SIGILL */ 282 "Trace/BPT trap", /* SIGTRAP */ 283 "IOT trap", /* SIGIOT */ 284 "EMT trap", /* SIGEMT */ 285 "Floating point exception", /* SIGFPE */ 286 "Killed", /* SIGKILL */ 287 "Bus error", /* SIGBUS */ 288 "Segmentation fault", /* SIGSEGV */ 289 "Bad system call", /* SIGSYS */ 290 "Broken pipe", /* SIGPIPE */ 291 "Alarm clock", /* SIGALRM */ 292 "Terminated", /* SIGTERM */ 293 "User defined signal 1", /* SIGUSR1 */ 294 "User defined signal 2", /* SIGUSR2 */ 295 "Child exited", /* SIGCLD */ 296 "Power-fail restart", /* SIGPWR */ 297 "Virtual timer expired", /* SIGVTALRM */ 298 "Profiling timer expired", /* SIGPROF */ 299 "I/O possible", /* SIGIO */ 300 "Window size changes", /* SIGWINDOW */ 301 "Stopped (signal)", /* SIGSTOP */ 302 "Stopped", /* SIGTSTP */ 303 "Continued", /* SIGCONT */ 304 "Stopped (tty input)", /* SIGTTIN */ 305 "Stopped (tty output)", /* SIGTTOU */ 306 "Urgent I/O condition", /* SIGURG */ 307 "Remote lock lost (NFS)", /* SIGLOST */ 308 "Signal 31", /* reserved */ 309 "DIL signal" /* SIGDIL */ 310 }; 311 312 int 313 utimes(file, tvp) 314 char *file; 315 struct timeval tvp[2]; 316 { 317 struct utimbuf t; 318 319 t.actime = tvp[0].tv_sec; 320 t.modtime = tvp[1].tv_sec; 321 return(utime(file, &t)); 322 } 323 324 325 #endif /* __hpux */ 326
Indexes created Sun Sep 21 18:09:52 GMT 2025