src/os.h

   1 /* Copyright (c) 1993-2002
   2  *      Juergen Weigert (jnweiger@immd4.informatik.uni-erlangen.de)
   3  *      Michael Schroeder (mlschroe@immd4.informatik.uni-erlangen.de)
   4  * Copyright (c) 1987 Oliver Laumann
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 3, or (at your option)
   9  * any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program (see the file COPYING); if not, see
  18  * http://www.gnu.org/licenses/, or contact Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA  02111-1301  USA
  20  *
  21  ****************************************************************
  22  * $Id$ FAU
  23  */
  24
  25 #include <stdio.h>
  26 #include <errno.h>
  27
  28 #include <sys/param.h>
  29
  30 /* In strict ANSI mode, HP-UX machines define __hpux but not hpux */
  31 #if defined(__hpux) && !defined(hpux)
  32 # define hpux
  33 #endif
  34
  35 #if defined(__bsdi__) || defined(__386BSD__) || defined(_CX_UX) || defined(hpux) || defined(_IBMR2) || defined(linux)
  36 # include <signal.h>
  37 #endif /* __bsdi__ || __386BSD__ || _CX_UX || hpux || _IBMR2 || linux */
  38
  39 #ifdef ISC
  40 # ifdef ENAMETOOLONG
  41 #  undef ENAMETOOLONG
  42 # endif
  43 # ifdef ENOTEMPTY
  44 #  undef ENOTEMPTY
  45 # endif
  46 # include <sys/bsdtypes.h>
  47 # include <net/errno.h>
  48 #endif
  49
  50 #ifdef sun
  51 # define getpgrp __getpgrp
  52 # define exit __exit
  53 #endif
  54 #ifdef POSIX
  55 # include <unistd.h>
  56 # if defined(__STDC__)
  57 #  include <stdlib.h>
  58 # endif /* __STDC__ */
  59 #endif /* POSIX */
  60 #ifdef sun
  61 # undef getpgrp
  62 # undef exit
  63 #endif /* sun */
  64
  65 #ifndef linux /* all done in <errno.h> */
  66 extern int errno;
  67 #endif /* linux */
  68 #ifndef HAVE_STRERROR
  69 /* No macros, please */
  70 #undef strerror
  71 #endif
  72
  73 #if !defined(SYSV) && !defined(linux)
  74 # ifdef NEWSOS
  75 #  define strlen ___strlen___
  76 #  include <strings.h>
  77 #  undef strlen
  78 # else /* NEWSOS */
  79 #  include <strings.h>
  80 # endif /* NEWSOS */
  81 #else /* SYSV */
  82 # if defined(SVR4) || defined(NEWSOS)
  83 #  define strlen ___strlen___
  84 #  include <string.h>
  85 #  undef strlen
  86 #  if !defined(NEWSOS) && !defined(__hpux)
  87     extern size_t strlen(const char *);
  88 #  endif
  89 # else /* SVR4 */
  90 #  include <string.h>
  91 # endif /* SVR4 */
  92 #endif /* SYSV */
  93
  94 #ifdef USEVARARGS
  95 # if defined(__STDC__)
  96 #  include <stdarg.h>
  97 #  define VA_LIST(var) va_list var;
  98 #  define VA_DOTS ...
  99 #  define VA_DECL
 100 #  define VA_START(ap, fmt) va_start(ap, fmt)
 101 #  define VA_ARGS(ap) ap
 102 #  define VA_END(ap) va_end(ap)
 103 # else
 104 #  include <varargs.h>
 105 #  define VA_LIST(var) va_list var;
 106 #  define VA_DOTS va_alist
 107 #  define VA_DECL va_dcl
 108 #  define VA_START(ap, fmt) va_start(ap)
 109 #  define VA_ARGS(ap) ap
 110 #  define VA_END(ap) va_end(ap)
 111 # endif
 112 #else
 113 # define VA_LIST(var)
 114 # define VA_DOTS p1, p2, p3, p4, p5, p6
 115 # define VA_DECL unsigned long VA_DOTS;
 116 # define VA_START(ap, fmt)
 117 # define VA_ARGS(ap) VA_DOTS
 118 # define VA_END(ap)
 119 # undef vsnprintf
 120 # define vsnprintf xsnprintf
 121 #endif
 122
 123 #if !defined(sun) && !defined(B43) && !defined(ISC) && !defined(pyr) && !defined(_CX_UX)
 124 # include <time.h>
 125 #endif
 126 #include <sys/time.h>
 127
 128 #ifdef M_UNIX   /* SCO */
 129 # include <sys/stream.h>
 130 # include <sys/ptem.h>
 131 # define ftruncate(fd, s) chsize(fd, s)
 132 #endif
 133
 134 #ifdef SYSV
 135 # define index strchr
 136 # define rindex strrchr
 137 # define bzero(poi,len) memset(poi,0,len)
 138 # define bcmp memcmp
 139 # define killpg(pgrp,sig) kill( -(pgrp), sig)
 140 #endif
 141
 142 #ifndef HAVE_GETCWD
 143 # define getcwd(b,l) getwd(b)
 144 #endif
 145
 146 #ifndef USEBCOPY
 147 # ifdef USEMEMMOVE
 148 #  define bcopy(s,d,len) memmove(d,s,len)
 149 # else
 150 #  ifdef USEMEMCPY
 151 #   define bcopy(s,d,len) memcpy(d,s,len)
 152 #  else
 153 #   define NEED_OWN_BCOPY
 154 #   define bcopy xbcopy
 155 #  endif
 156 # endif
 157 #endif
 158
 159 #if defined(HAVE_SETRESUID) && !defined(HAVE_SETREUID)
 160 # define setreuid(ruid, euid) setresuid(ruid, euid, -1)
 161 # define setregid(rgid, egid) setresgid(rgid, egid, -1)
 162 #endif
 163
 164 #if defined(HAVE_SETEUID) || defined(HAVE_SETREUID) || defined(HAVE_SETRESUID)
 165 # define USE_SETEUID
 166 #endif
 167
 168 #if !defined(HAVE__EXIT) && !defined(_exit)
 169 #define _exit(x) exit(x)
 170 #endif
 171
 172 #ifndef HAVE_UTIMES
 173 # define utimes utime
 174 #endif
 175 #ifndef HAVE_VSNPRINTF
 176 # define vsnprintf xvsnprintf
 177 #endif
 178
 179 #ifdef BUILTIN_TELNET
 180 # include <netinet/in.h>
 181 # include <arpa/inet.h>
 182 #endif
 183
 184 #if defined(USE_LOCALE) && (!defined(HAVE_SETLOCALE) || !defined(HAVE_STRFTIME))
 185 # undef USE_LOCALE
 186 #endif
 187
 188 /*****************************************************************
 189  *    terminal handling
 190  */
 191
 192 #ifdef POSIX
 193 # include <termios.h>
 194 # ifdef hpux
 195 #  include <bsdtty.h>
 196 # endif /* hpux */
 197 # ifdef NCCS
 198 #  define MAXCC NCCS
 199 # else
 200 #  define MAXCC 256
 201 # endif
 202 #else /* POSIX */
 203 # ifdef TERMIO
 204 #  include <termio.h>
 205 #  ifdef NCC
 206 #   define MAXCC NCC
 207 #  else
 208 #   define MAXCC 256
 209 #  endif
 210 #  ifdef CYTERMIO
 211 #   include <cytermio.h>
 212 #  endif
 213 # else /* TERMIO */
 214 #  include <sgtty.h>
 215 # endif /* TERMIO */
 216 #endif /* POSIX */
 217
 218 #ifndef VDISABLE
 219 # ifdef _POSIX_VDISABLE
 220 #  define VDISABLE _POSIX_VDISABLE
 221 # else
 222 #  define VDISABLE 0377
 223 # endif /* _POSIX_VDISABLE */
 224 #endif /* !VDISABLE */
 225
 226
 227 /* on sgi, regardless of the stream head's read mode (RNORM/RMSGN/RMSGD)
 228  * TIOCPKT mode causes data loss if our buffer is too small (IOSIZE)
 229  * to hold the whole packet at first read().
 230  * (Marc Boucher)
 231  *
 232  * matthew green:
 233  * TIOCPKT is broken on dgux 5.4.1 generic AViiON mc88100
 234  *
 235  * Joe Traister: On AIX4, programs like irc won't work if screen
 236  * uses TIOCPKT (select fails to return on pty read).
 237  */
 238 #if defined(sgi) || defined(DGUX) || defined(_IBMR2)
 239 # undef TIOCPKT
 240 #endif
 241
 242 /* linux ncurses is broken, we have to use our own tputs */
 243 #if defined(linux) && defined(TERMINFO)
 244 # define tputs xtputs
 245 #endif
 246
 247 /* Alexandre Oliva: SVR4 style ptys don't work with osf */
 248 #ifdef __osf__
 249 # undef HAVE_SVR4_PTYS
 250 #endif
 251
 252 /*****************************************************************
 253  *   utmp handling
 254  */
 255
 256 #ifdef GETUTENT
 257   typedef char *slot_t;
 258 #else
 259   typedef int slot_t;
 260 #endif
 261
 262 #if defined(UTMPOK) || defined(BUGGYGETLOGIN)
 263 # if defined(SVR4) && !defined(DGUX) && !defined(__hpux) && !defined(linux)
 264 #  include <utmpx.h>
 265 #  define UTMPFILE      UTMPX_FILE
 266 #  define utmp          utmpx
 267 #  define getutent      getutxent
 268 #  define getutid       getutxid
 269 #  define getutline     getutxline
 270 #  define pututline     pututxline
 271 #  define setutent      setutxent
 272 #  define endutent      endutxent
 273 #  define ut_time       ut_xtime
 274 # else /* SVR4 */
 275 #  include <utmp.h>
 276 # endif /* SVR4 */
 277 # ifdef apollo
 278    /*
 279     * We don't have GETUTENT, so we dig into utmp ourselves.
 280     * But we save the permanent filedescriptor and
 281     * open utmp just when we need to.
 282     * This code supports an unsorted utmp. jw.
 283     */
 284 #  define UTNOKEEP
 285 # endif /* apollo */
 286
 287 # ifndef UTMPFILE
 288 #  ifdef UTMP_FILE
 289 #   define UTMPFILE     UTMP_FILE
 290 #  else
 291 #   ifdef _PATH_UTMP
 292 #    define UTMPFILE    _PATH_UTMP
 293 #   else
 294 #    define UTMPFILE    "/etc/utmp"
 295 #   endif /* _PATH_UTMP */
 296 #  endif
 297 # endif
 298
 299 #endif /* UTMPOK || BUGGYGETLOGIN */
 300
 301 #if !defined(UTMPOK) && defined(USRLIMIT)
 302 # undef USRLIMIT
 303 #endif
 304
 305 #ifdef LOGOUTOK
 306 # ifndef LOGINDEFAULT
 307 #  define LOGINDEFAULT 0
 308 # endif
 309 #else
 310 # ifdef LOGINDEFAULT
 311 #  undef LOGINDEFAULT
 312 # endif
 313 # define LOGINDEFAULT 1
 314 #endif
 315
 316
 317 /*****************************************************************
 318  *    file stuff
 319  */
 320
 321 #ifndef F_OK
 322 #define F_OK 0
 323 #endif
 324 #ifndef X_OK
 325 #define X_OK 1
 326 #endif
 327 #ifndef W_OK
 328 #define W_OK 2
 329 #endif
 330 #ifndef R_OK
 331 #define R_OK 4
 332 #endif
 333
 334 #ifndef S_IFIFO
 335 #define S_IFIFO  0010000
 336 #endif
 337 #ifndef S_IREAD
 338 #define S_IREAD  0000400
 339 #endif
 340 #ifndef S_IWRITE
 341 #define S_IWRITE 0000200
 342 #endif
 343 #ifndef S_IEXEC
 344 #define S_IEXEC  0000100
 345 #endif
 346
 347 #if defined(S_IFIFO) && defined(S_IFMT) && !defined(S_ISFIFO)
 348 #define S_ISFIFO(mode) (((mode) & S_IFMT) == S_IFIFO)
 349 #endif
 350 #if defined(S_IFSOCK) && defined(S_IFMT) && !defined(S_ISSOCK)
 351 #define S_ISSOCK(mode) (((mode) & S_IFMT) == S_IFSOCK)
 352 #endif
 353 #if defined(S_IFCHR) && defined(S_IFMT) && !defined(S_ISCHR)
 354 #define S_ISCHR(mode) (((mode) & S_IFMT) == S_IFCHR)
 355 #endif
 356 #if defined(S_IFDIR) && defined(S_IFMT) && !defined(S_ISDIR)
 357 #define S_ISDIR(mode) (((mode) & S_IFMT) == S_IFDIR)
 358 #endif
 359 #if defined(S_IFLNK) && defined(S_IFMT) && !defined(S_ISLNK)
 360 #define S_ISLNK(mode) (((mode) & S_IFMT) == S_IFLNK)
 361 #endif
 362
 363 /*
 364  * SunOS 4.1.3: `man 2V open' has only one line that mentions O_NOBLOCK:
 365  *
 366  *     O_NONBLOCK     Same as O_NDELAY above.
 367  *
 368  * on the very same SunOS 4.1.3, I traced the open system call and found
 369  * that an open("/dev/ttyy08", O_RDWR|O_NONBLOCK|O_NOCTTY) was blocked,
 370  * whereas open("/dev/ttyy08", O_RDWR|O_NDELAY  |O_NOCTTY) went through.
 371  *
 372  * For this simple reason I now favour O_NDELAY. jw. 4.5.95
 373  */
 374 #if defined(sun) && !defined(SVR4)
 375 # undef O_NONBLOCK
 376 #endif
 377
 378 #if !defined(O_NONBLOCK) && defined(O_NDELAY)
 379 # define O_NONBLOCK O_NDELAY
 380 #endif
 381
 382 #if !defined(FNBLOCK) && defined(FNONBLOCK)
 383 # define FNBLOCK FNONBLOCK
 384 #endif
 385 #if !defined(FNBLOCK) && defined(FNDELAY)
 386 # define FNBLOCK FNDELAY
 387 #endif
 388 #if !defined(FNBLOCK) && defined(O_NONBLOCK)
 389 # define FNBLOCK O_NONBLOCK
 390 #endif
 391
 392 #ifndef POSIX
 393 #undef mkfifo
 394 #define mkfifo(n,m) mknod(n,S_IFIFO|(m),0)
 395 #endif
 396
 397 #if !defined(HAVE_LSTAT) && !defined(lstat)
 398 # define lstat stat
 399 #endif
 400
 401 /*****************************************************************
 402  *    signal handling
 403  */
 404
 405 #ifdef SIGVOID
 406 # define SIGRETURN
 407 # define sigret_t void
 408 #else
 409 # define SIGRETURN return 0;
 410 # define sigret_t int
 411 #endif
 412
 413 /* Geeeee, reverse it? */
 414 #if defined(SVR4) || (defined(SYSV) && defined(ISC)) || defined(_AIX) || defined(linux) || defined(ultrix) || defined(__386BSD__) || defined(__bsdi__) || defined(POSIX) || defined(NeXT)
 415 # define SIGHASARG
 416 #endif
 417
 418 #ifdef SIGHASARG
 419 # define SIGPROTOARG   (int)
 420 # define SIGDEFARG     (sigsig) int sigsig;
 421 # define SIGARG        0
 422 #else
 423 # define SIGPROTOARG   (void)
 424 # define SIGDEFARG     ()
 425 # define SIGARG
 426 #endif
 427
 428 #ifndef SIGCHLD
 429 #define SIGCHLD SIGCLD
 430 #endif
 431
 432 #if defined(POSIX) || defined(hpux)
 433 # define signal xsignal
 434 #else
 435 # ifdef USESIGSET
 436 #  define signal sigset
 437 # endif /* USESIGSET */
 438 #endif
 439
 440 /* used in screen.c and attacher.c */
 441 #ifndef NSIG            /* kbeal needs these w/o SYSV */
 442 # define NSIG 32
 443 #endif /* !NSIG */
 444
 445
 446 /*****************************************************************
 447  *    Wait stuff
 448  */
 449
 450 #if (!defined(sysV68) && !defined(M_XENIX)) || defined(NeXT) || defined(M_UNIX)
 451 # include <sys/wait.h>
 452 #endif
 453
 454 #ifndef WTERMSIG
 455 # ifndef BSDWAIT /* if wait is NOT a union: */
 456 #  define WTERMSIG(status) (status & 0177)
 457 # else
 458 #  define WTERMSIG(status) status.w_T.w_Termsig
 459 # endif
 460 #endif
 461
 462 #ifndef WSTOPSIG
 463 # ifndef BSDWAIT /* if wait is NOT a union: */
 464 #  define WSTOPSIG(status) ((status >> 8) & 0377)
 465 # else
 466 #  define WSTOPSIG(status) status.w_S.w_Stopsig
 467 # endif
 468 #endif
 469
 470 /* NET-2 uses WCOREDUMP */
 471 #if defined(WCOREDUMP) && !defined(WIFCORESIG)
 472 # define WIFCORESIG(status) WCOREDUMP(status)
 473 #endif
 474
 475 #ifndef WIFCORESIG
 476 # ifndef BSDWAIT /* if wait is NOT a union: */
 477 #  define WIFCORESIG(status) (status & 0200)
 478 # else
 479 #  define WIFCORESIG(status) status.w_T.w_Coredump
 480 # endif
 481 #endif
 482
 483 #ifndef WEXITSTATUS
 484 # ifndef BSDWAIT /* if wait is NOT a union: */
 485 #  define WEXITSTATUS(status) ((status >> 8) & 0377)
 486 # else
 487 #  define WEXITSTATUS(status) status.w_T.w_Retcode
 488 # endif
 489 #endif
 490
 491
 492 /*****************************************************************
 493  *    select stuff
 494  */
 495
 496 #if defined(M_XENIX) || defined(M_UNIX) || defined(_SEQUENT_)
 497 #include <sys/select.h>         /* for timeval + FD... */
 498 #endif
 499
 500 /*
 501  * SunOS 3.5 - Tom Schmidt - Micron Semiconductor, Inc - 27-Jul-93
 502  * tschmidt@vax.micron.com
 503  */
 504 #ifndef FD_SET
 505 # ifndef SUNOS3
 506 typedef struct fd_set { int fds_bits[1]; } fd_set;
 507 # endif
 508 # define FD_ZERO(fd) ((fd)->fds_bits[0] = 0)
 509 # define FD_SET(b, fd) ((fd)->fds_bits[0] |= 1 << (b))
 510 # define FD_ISSET(b, fd) ((fd)->fds_bits[0] & 1 << (b))
 511 # define FD_SETSIZE 32
 512 #endif
 513
 514
 515 /*****************************************************************
 516  *    user defineable stuff
 517  */
 518
 519 #ifndef TERMCAP_BUFSIZE
 520 # define TERMCAP_BUFSIZE 2048
 521 #endif
 522
 523 #ifndef MAXPATHLEN
 524 # define MAXPATHLEN 1024
 525 #endif
 526
 527 /*
 528  * you may try to vary this value. Use low values if your (VMS) system
 529  * tends to choke when pasting. Use high values if you want to test
 530  * how many characters your pty's can buffer.
 531  */
 532 #define IOSIZE          4096
 533