1: /*
   2:   Copyright (C) 1985, 1996, Trustees of Columbia University in the City of New
   3:   York.  The C-Kermit software may not be, in whole or in part, licensed or
   4:   sold for profit as a software product itself, nor may it be included in or
   5:   distributed with commercial products or otherwise distributed by commercial
   6:   concerns to their clients or customers without written permission of the
   7:   Office of Kermit Development and Distribution, Columbia University.  This
   8:   copyright notice must not be removed, altered, or obscured.
   9: */
  10: 
  11: /*
  12:  * ckustr.c - string extraction/restoration routines
  13: */
  14: 
  15: #include <stdio.h>
  16: #include <sysexits.h>
  17: #include <varargs.h>
  18: #include <paths.h>
  19: 
  20: /*
  21:   STR_FILE must be defined as a quoted string on the cc command line,
  22:   for example:
  23: 
  24:   	-DSTR_FILE=\\\"/usr/local/lib/kermit5.sr\\\"
  25: 
  26:   This is the file where the strings go, and where C-Kermit looks for them
  27:   at runtime.
  28: */
  29: 
  30: #ifdef STR_FILE
  31: char    *StringFile = STR_FILE;
  32: #else
  33: char    *StringFile = "/usr/local/lib/kermit5.sr";
  34: #endif /* STR_FILE */
  35: 
  36: /*
  37:  * If _PATH_CTIMED is defined (in <paths.h>) then use that definition.  2.11BSD
  38:  * has this defined but 2.10BSD and other systems do not.
  39: */
  40: 
  41: #ifndef _PATH_CTIMED
  42: #define _PATH_CTIMED STR_CTIMED
  43: #endif
  44: 
  45: extern int errno;
  46: static int strfile = -1, ourpid = 0;
  47: 
  48: #define BUFLEN 256
  49: 
  50: errprep(offset, buf)
  51: unsigned short offset;
  52: char *buf;
  53: {
  54: register int pid = getpid();
  55: 
  56:     if (pid != ourpid) {
  57:         ourpid = pid;
  58:         if (strfile >= 0) {
  59:             close(strfile);
  60:             strfile = -1;
  61:         }
  62:     }
  63:     if (strfile < 0) {
  64:             char *p, *getenv();
  65:         if (p = getenv("KSTR"))
  66:           if (strlen(p))
  67:             StringFile = p;
  68:         strfile = open(StringFile, 0);
  69:         if (strfile < 0) {
  70: oops:
  71:             fprintf(stderr, "Cannot find %s\r\n", StringFile);
  72:             exit(EX_OSFILE);
  73:         }
  74:     }
  75:     if (lseek(strfile, (long) offset, 0) < 0
  76:             || read(strfile, buf, BUFLEN) <= 0)
  77:         goto oops;
  78: }
  79: 
  80: /* extracted string front end for printf() */
  81: /*VARARGS1*/
  82: strprerror(fmt, va_alist)
  83:     int fmt;
  84:     va_dcl
  85: {
  86:     va_list ap;
  87:     char buf[BUFLEN];
  88: 
  89:     errprep(fmt, buf);
  90:     va_start(ap);
  91:     vprintf(buf, ap);
  92:     va_end(ap);
  93: }
  94: 
  95: /* extracted string front end for sprintf() */
  96: /*VARARGS1*/
  97: strsrerror(fmt, obuf, va_alist)
  98:     int fmt;
  99:     char *obuf;
 100:     va_dcl
 101: {
 102:     char buf[BUFLEN];
 103:     va_list ap;
 104: 
 105:     errprep(fmt, buf);
 106:     va_start(ap);
 107:     vsprintf(obuf, buf, ap);
 108:     va_end(ap);
 109: }
 110: 
 111: /* extracted string front end for fprintf() */
 112: /*VARARGS1*/
 113: strfrerror(fmt, fd, va_alist)
 114:     int fmt;
 115:     FILE *fd;
 116:     va_dcl
 117: {
 118:     va_list ap;
 119:     char buf[BUFLEN];
 120: 
 121:     errprep(fmt, buf);
 122:     va_start(ap);
 123:     vfprintf(fd, buf, ap);
 124:     va_end(ap);
 125: }
 126: 
 127: /* extracted string front end for perror() */
 128: strperror(fmt)
 129:     int fmt;
 130: {
 131:     char buf[BUFLEN];
 132:     register int saverr = errno;
 133: 
 134:     errprep(fmt, buf);
 135:     errno = saverr;
 136:     perror(buf);
 137: }
 138: 
 139: perror(str)
 140:     char    *str;
 141:     {
 142: 
 143:     printf("%s: errno %d\n", str, errno);
 144:     }
 145: 
 146: /*
 147:  * The following is needed _only_ on systems which do not have the C library
 148:  * stubs for the ctime() and getpw*() functions.  In 2.11BSD these are
 149:  * present in the libstubs.a library and accessed via "-lstubs" at link time.
 150:  *
 151:  * 2.10BSD's cpp has the BSD2_10 symbol builtin.  Other systems without
 152:  * libstubs.a will need to define (via a -D option in CFLAGS) 'BSD2_10'.
 153: */
 154: 
 155: #ifdef  BSD2_10
 156: 
 157: #include <sys/types.h>
 158: #include <sys/time.h>
 159: #include <pwd.h>
 160: #include <utmp.h>
 161: 
 162: #define SEND_FD W[1]
 163: #define RECV_FD R[0]
 164: 
 165: #define CTIME   1
 166: #define ASCTIME 2
 167: #define TZSET   3
 168: #define LOCALTIME 4
 169: #define GMTIME  5
 170: #define OFFTIME 6
 171: 
 172: #define GETPWENT        7
 173: #define GETPWNAM        8
 174: #define GETPWUID        9
 175: #define SETPASSENT      10
 176: #define ENDPWENT        11
 177: 
 178:     static  int R[2], W[2], inited;
 179:     static  char    result[256 + 4];
 180:     static  struct  tm  tmtmp;
 181:     static  struct  passwd  _pw, *getandfixpw();
 182: 
 183: char    *
 184: ctime(t)
 185:     time_t  *t;
 186:     {
 187:     u_char  fnc = CTIME;
 188: 
 189:     sewer();
 190:     write(SEND_FD, &fnc, sizeof fnc);
 191:     write(SEND_FD, t, sizeof (*t));
 192:     getb(RECV_FD, result, 26);
 193:     return(result);
 194:     }
 195: 
 196: char    *
 197: asctime(tp)
 198:     struct  tm  *tp;
 199:     {
 200:     u_char  fnc = ASCTIME;
 201: 
 202:     sewer();
 203:     write(SEND_FD, &fnc, sizeof fnc);
 204:     write(SEND_FD, tp, sizeof (*tp));
 205:     getb(RECV_FD, result, 26);
 206:     return(result);
 207:     }
 208: 
 209: void
 210: tzset()
 211:     {
 212:     u_char  fnc = TZSET;
 213: 
 214:     sewer();
 215:     write(SEND_FD, &fnc, sizeof fnc);
 216:     }
 217: 
 218: struct  tm *
 219: localtime(tp)
 220:     time_t  *tp;
 221:     {
 222:     u_char  fnc = LOCALTIME;
 223: 
 224:     sewer();
 225:     write(SEND_FD, &fnc, sizeof fnc);
 226:     write(SEND_FD, tp, sizeof (*tp));
 227:     getb(RECV_FD, &tmtmp, sizeof tmtmp);
 228:     getb(RECV_FD, result, 24);
 229:     tmtmp.tm_zone = result;
 230:     return(&tmtmp);
 231:     }
 232: 
 233: struct  tm *
 234: gmtime(tp)
 235:     time_t  *tp;
 236:     {
 237:     u_char  fnc = GMTIME;
 238: 
 239:     sewer();
 240:     write(SEND_FD, &fnc, sizeof fnc);
 241:     write(SEND_FD, tp, sizeof (*tp));
 242:     getb(RECV_FD, &tmtmp, sizeof tmtmp);
 243:     getb(RECV_FD, result, 24);
 244:     tmtmp.tm_zone = result;
 245:     return(&tmtmp);
 246:     }
 247: 
 248: struct  tm *
 249: offtime(clock, offset)
 250:     time_t  *clock;
 251:     long    offset;
 252:     {
 253:     u_char  fnc = OFFTIME;
 254: 
 255:     sewer();
 256:     write(SEND_FD, &fnc, sizeof fnc);
 257:     write(SEND_FD, clock, sizeof (*clock));
 258:     write(SEND_FD, &offset, sizeof offset);
 259:     getb(RECV_FD, &tmtmp, sizeof tmtmp);
 260:     tmtmp.tm_zone = "";
 261:     return(&tmtmp);
 262:     }
 263: 
 264: struct passwd *
 265: getpwent()
 266:     {
 267:     u_char  fnc = GETPWENT;
 268: 
 269:     sewer();
 270:     write(SEND_FD, &fnc, sizeof fnc);
 271:     return(getandfixpw());
 272:     }
 273: 
 274: struct  passwd *
 275: getpwnam(nam)
 276:     char    *nam;
 277:     {
 278:     u_char  fnc = GETPWNAM;
 279:     char    lnam[UT_NAMESIZE + 1];
 280:     int len;
 281: 
 282:     len = strlen(nam);
 283:     if  (len > UT_NAMESIZE)
 284:         len = UT_NAMESIZE;
 285:     bcopy(nam, lnam, len);
 286:     lnam[len] = '\0';
 287: 
 288:     sewer();
 289:     write(SEND_FD, &fnc, 1);
 290:     write(SEND_FD, &len, sizeof (int));
 291:     write(SEND_FD, lnam, len);
 292:     return(getandfixpw());
 293:     }
 294: 
 295: struct  passwd  *
 296: getpwuid(uid)
 297:     uid_t   uid;
 298:     {
 299:     u_char  fnc = GETPWUID;
 300: 
 301:     sewer();
 302:     write(SEND_FD, &fnc, sizeof fnc);
 303:     write(SEND_FD, &uid, sizeof (uid_t));
 304:     return(getandfixpw());
 305:     }
 306: 
 307: setpwent()
 308:     {
 309:     return(setpassent(0));
 310:     }
 311: 
 312: setpassent(stayopen)
 313:     int stayopen;
 314:     {
 315:     u_char  fnc = SETPASSENT;
 316:     int sts;
 317: 
 318:     sewer();
 319:     write(SEND_FD, &fnc, sizeof fnc);
 320:     write(SEND_FD, &stayopen, sizeof (int));
 321:     getb(RECV_FD, &sts, sizeof (int));
 322:     return(sts);
 323:     }
 324: 
 325: void
 326: endpwent()
 327:     {
 328:     u_char  fnc = ENDPWENT;
 329: 
 330:     sewer();
 331:     write(SEND_FD, &fnc, sizeof fnc);
 332:     return;
 333:     }
 334: 
 335: /* setpwfile() is deprecated */
 336: void
 337: setpwfile(file)
 338:     char    *file;
 339:     {
 340:     return;
 341:     }
 342: 
 343: struct passwd *
 344: getandfixpw()
 345:     {
 346:     short   sz;
 347: 
 348:     getb(RECV_FD, &sz, sizeof (int));
 349:     if  (sz == 0)
 350:         return(NULL);
 351:     getb(RECV_FD, &_pw, sizeof (_pw));
 352:     getb(RECV_FD, result, sz);
 353:     _pw.pw_name += (int)result;
 354:     _pw.pw_passwd += (int)result;
 355:     _pw.pw_class += (int)result;
 356:     _pw.pw_gecos += (int)result;
 357:     _pw.pw_dir += (int)result;
 358:     _pw.pw_shell += (int)result;
 359:     return(&_pw);
 360:     }
 361: 
 362: getb(f, p, n)
 363:     register int f, n;
 364:     register char *p;
 365:     {
 366:     int i;
 367: 
 368:     while   (n)
 369:         {
 370:         i = read(f, p, n);
 371:         if  (i <= 0)
 372:             return;
 373:         p += i;
 374:         n -= i;
 375:         }
 376:     }
 377: 
 378: sewer()
 379:     {
 380:     register int    pid, ourpid = getpid();
 381: 
 382:     if  (inited == ourpid)
 383:         return;
 384:     if  (inited)
 385:         {
 386:         close(SEND_FD);
 387:         close(RECV_FD);
 388:         }
 389:     pipe(W);
 390:     pipe(R);
 391:     pid = vfork();
 392:     if  (pid == 0)
 393:         {           /* child */
 394:         alarm(0);       /* cancel alarms */
 395:         dup2(W[0], 0);      /* parent write side to our stdin */
 396:         dup2(R[1], 1);      /* parent read side to our stdout */
 397:         close(SEND_FD);     /* copies made, close the... */
 398:         close(RECV_FD);     /* originals now */
 399:         execl(_PATH_CTIMED, "ctimed", 0);
 400:         _exit(EX_OSFILE);
 401:         }
 402:     if  (pid == -1)
 403:         abort();        /* nothing else really to do */
 404:     close(W[0]);            /* close read side of SEND channel */
 405:     close(R[1]);            /* close write side of RECV channel */
 406:     inited = ourpid;        /* don't do this again in this proc */
 407:     }
 408: 
 409: XXctime()
 410:     {
 411: 
 412:     if  (SEND_FD)
 413:         close(SEND_FD);
 414:     if  (RECV_FD)
 415:         close(RECV_FD);
 416:     SEND_FD = RECV_FD = 0;
 417:     inited = 0;
 418:     }
 419: #endif	/* BSD2_10 */

Defined functions

XXctime defined in line 409; never used
ctime defined in line 183; used 6 times
endpwent defined in line 325; used 1 times
errprep defined in line 50; used 4 times
getandfixpw defined in line 343; used 4 times
getb defined in line 362; used 11 times
getpwent defined in line 264; used 1 times
gmtime defined in line 233; used 1 times
offtime defined in line 248; used 2 times
setpassent defined in line 312; used 2 times
setpwent defined in line 307; never used
setpwfile defined in line 336; never used
sewer defined in line 378; used 11 times
strfrerror defined in line 113; never used
strperror defined in line 128; never used
strprerror defined in line 82; never used
strsrerror defined in line 97; never used

Defined variables

R defined in line 178; used 4 times
StringFile defined in line 33; used 3 times
W defined in line 178; used 4 times
_pw defined in line 181; used 9 times
inited defined in line 178; used 4 times
result defined in line 179; used 15 times
strfile defined in line 46; used 8 times
tmtmp defined in line 180; used 12 times

Defined macros

ASCTIME defined in line 166; used 1 times
BUFLEN defined in line 48; used 5 times
CTIME defined in line 165; used 1 times
ENDPWENT defined in line 176; used 1 times
GETPWENT defined in line 172; used 1 times
GETPWNAM defined in line 173; used 1 times
GETPWUID defined in line 174; used 1 times
GMTIME defined in line 169; used 1 times
LOCALTIME defined in line 168; used 1 times
OFFTIME defined in line 170; used 1 times
RECV_FD defined in line 163; used 16 times
SEND_FD defined in line 162; used 26 times
SETPASSENT defined in line 175; used 1 times
TZSET defined in line 167; used 1 times
_PATH_CTIMED defined in line 42; used 2 times
Last modified: 1996-07-18
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