src/os.h

   1 /* Copyright (c) 2008
   2  *      Juergen Weigert (jnweiger@immd4.informatik.uni-erlangen.de)
   3  *      Michael Schroeder (mlschroe@immd4.informatik.uni-erlangen.de)
   4  *      Micah Cowan (micah@cowan.name)
   5  *      Sadrul Habib Chowdhury (sadrul@users.sourceforge.net)
   6  * Copyright (c) 1993-2002, 2003, 2005, 2006, 2007
   7  *      Juergen Weigert (jnweiger@immd4.informatik.uni-erlangen.de)
   8  *      Michael Schroeder (mlschroe@immd4.informatik.uni-erlangen.de)
   9  * Copyright (c) 1987 Oliver Laumann
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 3, or (at your option)
  14  * any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program (see the file COPYING); if not, see
  23  * http://www.gnu.org/licenses/, or contact Free Software Foundation, Inc.,
  24  * 51 Franklin Street, Fifth Floor, Boston, MA  02111-1301  USA
  25  *
  26  ****************************************************************
  27  * $Id$ FAU
  28  */
  29
  30 #include <stdio.h>
  31 #include <errno.h>
  32
  33 #include <sys/param.h>
  34
  35 /* In strict ANSI mode, HP-UX machines define __hpux but not hpux */
  36 #if defined(__hpux) && !defined(hpux)
  37 # define hpux
  38 #endif
  39
  40 #if defined(__bsdi__) || defined(__386BSD__) || defined(_CX_UX) || defined(hpux) || defined(_IBMR2) || defined(linux)
  41 # include <signal.h>
  42 #endif /* __bsdi__ || __386BSD__ || _CX_UX || hpux || _IBMR2 || linux */
  43
  44 #ifdef ISC
  45 # ifdef ENAMETOOLONG
  46 #  undef ENAMETOOLONG
  47 # endif
  48 # ifdef ENOTEMPTY
  49 #  undef ENOTEMPTY
  50 # endif
  51 # include <sys/bsdtypes.h>
  52 # include <net/errno.h>
  53 #endif
  54
  55 #ifdef sun
  56 # define getpgrp __getpgrp
  57 # define exit __exit
  58 #endif
  59 #ifdef POSIX
  60 # include <unistd.h>
  61 # if defined(__STDC__)
  62 #  include <stdlib.h>
  63 # endif /* __STDC__ */
  64 #endif /* POSIX */
  65 #ifdef sun
  66 # undef getpgrp
  67 # undef exit
  68 #endif /* sun */
  69
  70 #ifndef linux /* all done in <errno.h> */
  71 extern int errno;
  72 #endif /* linux */
  73 #ifndef HAVE_STRERROR
  74 /* No macros, please */
  75 #undef strerror
  76 #endif
  77
  78 #if !defined(SYSV) && !defined(linux)
  79 # ifdef NEWSOS
  80 #  define strlen ___strlen___
  81 #  include <strings.h>
  82 #  undef strlen
  83 # else /* NEWSOS */
  84 #  include <strings.h>
  85 # endif /* NEWSOS */
  86 #else /* SYSV */
  87 # if defined(SVR4) || defined(NEWSOS)
  88 #  define strlen ___strlen___
  89 #  include <string.h>
  90 #  undef strlen
  91 #  if !defined(NEWSOS) && !defined(__hpux)
  92     extern size_t strlen(const char *);
  93 #  endif
  94 # else /* SVR4 */
  95 #  include <string.h>
  96 # endif /* SVR4 */
  97 #endif /* SYSV */
  98
  99 #ifdef USEVARARGS
 100 # if defined(__STDC__)
 101 #  include <stdarg.h>
 102 #  define VA_LIST(var) va_list var;
 103 #  define VA_DOTS ...
 104 #  define VA_DECL
 105 #  define VA_START(ap, fmt) va_start(ap, fmt)
 106 #  define VA_ARGS(ap) ap
 107 #  define VA_END(ap) va_end(ap)
 108 # else
 109 #  include <varargs.h>
 110 #  define VA_LIST(var) va_list var;
 111 #  define VA_DOTS va_alist
 112 #  define VA_DECL va_dcl
 113 #  define VA_START(ap, fmt) va_start(ap)
 114 #  define VA_ARGS(ap) ap
 115 #  define VA_END(ap) va_end(ap)
 116 # endif
 117 #else
 118 # define VA_LIST(var)
 119 # define VA_DOTS p1, p2, p3, p4, p5, p6
 120 # define VA_DECL unsigned long VA_DOTS;
 121 # define VA_START(ap, fmt)
 122 # define VA_ARGS(ap) VA_DOTS
 123 # define VA_END(ap)
 124 # undef vsnprintf
 125 # define vsnprintf xsnprintf
 126 #endif
 127
 128 #if !defined(sun) && !defined(B43) && !defined(ISC) && !defined(pyr) && !defined(_CX_UX)
 129 # include <time.h>
 130 #endif
 131 #include <sys/time.h>
 132
 133 #ifdef M_UNIX   /* SCO */
 134 # include <sys/stream.h>
 135 # include <sys/ptem.h>
 136 # define ftruncate(fd, s) chsize(fd, s)
 137 #endif
 138
 139 #ifdef SYSV
 140 # define index strchr
 141 # define rindex strrchr
 142 # define bzero(poi,len) memset(poi,0,len)
 143 # define bcmp memcmp
 144 # define killpg(pgrp,sig) kill( -(pgrp), sig)
 145 #endif
 146
 147 #ifndef HAVE_GETCWD
 148 # define getcwd(b,l) getwd(b)
 149 #endif
 150
 151 #ifndef USEBCOPY
 152 # ifdef USEMEMMOVE
 153 #  define bcopy(s,d,len) memmove(d,s,len)
 154 # else
 155 #  ifdef USEMEMCPY
 156 #   define bcopy(s,d,len) memcpy(d,s,len)
 157 #  else
 158 #   define NEED_OWN_BCOPY
 159 #   define bcopy xbcopy
 160 #  endif
 161 # endif
 162 #endif
 163
 164 #if defined(HAVE_SETRESUID) && !defined(HAVE_SETREUID)
 165 # define setreuid(ruid, euid) setresuid(ruid, euid, -1)
 166 # define setregid(rgid, egid) setresgid(rgid, egid, -1)
 167 #endif
 168
 169 #if defined(HAVE_SETEUID) || defined(HAVE_SETREUID) || defined(HAVE_SETRESUID)
 170 # define USE_SETEUID
 171 #endif
 172
 173 #if !defined(HAVE__EXIT) && !defined(_exit)
 174 #define _exit(x) exit(x)
 175 #endif
 176
 177 #ifndef HAVE_UTIMES
 178 # define utimes utime
 179 #endif
 180 #ifndef HAVE_VSNPRINTF
 181 # define vsnprintf xvsnprintf
 182 #endif
 183
 184 #ifdef BUILTIN_TELNET
 185 # include <netinet/in.h>
 186 # include <arpa/inet.h>
 187 #endif
 188
 189 #if defined(USE_LOCALE) && (!defined(HAVE_SETLOCALE) || !defined(HAVE_STRFTIME))
 190 # undef USE_LOCALE
 191 #endif
 192
 193 /*****************************************************************
 194  *    terminal handling
 195  */
 196
 197 #ifdef POSIX
 198 # include <termios.h>
 199 # ifdef hpux
 200 #  include <bsdtty.h>
 201 # endif /* hpux */
 202 # ifdef NCCS
 203 #  define MAXCC NCCS
 204 # else
 205 #  define MAXCC 256
 206 # endif
 207 #else /* POSIX */
 208 # ifdef TERMIO
 209 #  include <termio.h>
 210 #  ifdef NCC
 211 #   define MAXCC NCC
 212 #  else
 213 #   define MAXCC 256
 214 #  endif
 215 #  ifdef CYTERMIO
 216 #   include <cytermio.h>
 217 #  endif
 218 # else /* TERMIO */
 219 #  include <sgtty.h>
 220 # endif /* TERMIO */
 221 #endif /* POSIX */
 222
 223 #ifndef VDISABLE
 224 # ifdef _POSIX_VDISABLE
 225 #  define VDISABLE _POSIX_VDISABLE
 226 # else
 227 #  define VDISABLE 0377
 228 # endif /* _POSIX_VDISABLE */
 229 #endif /* !VDISABLE */
 230
 231
 232 /* on sgi, regardless of the stream head's read mode (RNORM/RMSGN/RMSGD)
 233  * TIOCPKT mode causes data loss if our buffer is too small (IOSIZE)
 234  * to hold the whole packet at first read().
 235  * (Marc Boucher)
 236  *
 237  * matthew green:
 238  * TIOCPKT is broken on dgux 5.4.1 generic AViiON mc88100
 239  *
 240  * Joe Traister: On AIX4, programs like irc won't work if screen
 241  * uses TIOCPKT (select fails to return on pty read).
 242  */
 243 #if defined(sgi) || defined(DGUX) || defined(_IBMR2)
 244 # undef TIOCPKT
 245 #endif
 246
 247 /* linux ncurses is broken, we have to use our own tputs */
 248 #if defined(linux) && defined(TERMINFO)
 249 # define tputs xtputs
 250 #endif
 251
 252 /* Alexandre Oliva: SVR4 style ptys don't work with osf */
 253 #ifdef __osf__
 254 # undef HAVE_SVR4_PTYS
 255 #endif
 256
 257 /*****************************************************************
 258  *   utmp handling
 259  */
 260
 261 #ifdef GETUTENT
 262   typedef char *slot_t;
 263 #else
 264   typedef int slot_t;
 265 #endif
 266
 267 #if defined(UTMPOK) || defined(BUGGYGETLOGIN)
 268 # if defined(SVR4) && !defined(DGUX) && !defined(__hpux) && !defined(linux)
 269 #  include <utmpx.h>
 270 #  define UTMPFILE      UTMPX_FILE
 271 #  define utmp          utmpx
 272 #  define getutent      getutxent
 273 #  define getutid       getutxid
 274 #  define getutline     getutxline
 275 #  define pututline     pututxline
 276 #  define setutent      setutxent
 277 #  define endutent      endutxent
 278 #  define ut_time       ut_xtime
 279 # else /* SVR4 */
 280 #  include <utmp.h>
 281 # endif /* SVR4 */
 282 # ifdef apollo
 283    /*
 284     * We don't have GETUTENT, so we dig into utmp ourselves.
 285     * But we save the permanent filedescriptor and
 286     * open utmp just when we need to.
 287     * This code supports an unsorted utmp. jw.
 288     */
 289 #  define UTNOKEEP
 290 # endif /* apollo */
 291
 292 # ifndef UTMPFILE
 293 #  ifdef UTMP_FILE
 294 #   define UTMPFILE     UTMP_FILE
 295 #  else
 296 #   ifdef _PATH_UTMP
 297 #    define UTMPFILE    _PATH_UTMP
 298 #   else
 299 #    define UTMPFILE    "/etc/utmp"
 300 #   endif /* _PATH_UTMP */
 301 #  endif
 302 # endif
 303
 304 #endif /* UTMPOK || BUGGYGETLOGIN */
 305
 306 #if !defined(UTMPOK) && defined(USRLIMIT)
 307 # undef USRLIMIT
 308 #endif
 309
 310 #ifdef LOGOUTOK
 311 # ifndef LOGINDEFAULT
 312 #  define LOGINDEFAULT 0
 313 # endif
 314 #else
 315 # ifdef LOGINDEFAULT
 316 #  undef LOGINDEFAULT
 317 # endif
 318 # define LOGINDEFAULT 1
 319 #endif
 320
 321
 322 /*****************************************************************
 323  *    file stuff
 324  */
 325
 326 #ifndef F_OK
 327 #define F_OK 0
 328 #endif
 329 #ifndef X_OK
 330 #define X_OK 1
 331 #endif
 332 #ifndef W_OK
 333 #define W_OK 2
 334 #endif
 335 #ifndef R_OK
 336 #define R_OK 4
 337 #endif
 338
 339 #ifndef S_IFIFO
 340 #define S_IFIFO  0010000
 341 #endif
 342 #ifndef S_IREAD
 343 #define S_IREAD  0000400
 344 #endif
 345 #ifndef S_IWRITE
 346 #define S_IWRITE 0000200
 347 #endif
 348 #ifndef S_IEXEC
 349 #define S_IEXEC  0000100
 350 #endif
 351
 352 #if defined(S_IFIFO) && defined(S_IFMT) && !defined(S_ISFIFO)
 353 #define S_ISFIFO(mode) (((mode) & S_IFMT) == S_IFIFO)
 354 #endif
 355 #if defined(S_IFSOCK) && defined(S_IFMT) && !defined(S_ISSOCK)
 356 #define S_ISSOCK(mode) (((mode) & S_IFMT) == S_IFSOCK)
 357 #endif
 358 #if defined(S_IFCHR) && defined(S_IFMT) && !defined(S_ISCHR)
 359 #define S_ISCHR(mode) (((mode) & S_IFMT) == S_IFCHR)
 360 #endif
 361 #if defined(S_IFDIR) && defined(S_IFMT) && !defined(S_ISDIR)
 362 #define S_ISDIR(mode) (((mode) & S_IFMT) == S_IFDIR)
 363 #endif
 364 #if defined(S_IFLNK) && defined(S_IFMT) && !defined(S_ISLNK)
 365 #define S_ISLNK(mode) (((mode) & S_IFMT) == S_IFLNK)
 366 #endif
 367
 368 /*
 369  * SunOS 4.1.3: `man 2V open' has only one line that mentions O_NOBLOCK:
 370  *
 371  *     O_NONBLOCK     Same as O_NDELAY above.
 372  *
 373  * on the very same SunOS 4.1.3, I traced the open system call and found
 374  * that an open("/dev/ttyy08", O_RDWR|O_NONBLOCK|O_NOCTTY) was blocked,
 375  * whereas open("/dev/ttyy08", O_RDWR|O_NDELAY  |O_NOCTTY) went through.
 376  *
 377  * For this simple reason I now favour O_NDELAY. jw. 4.5.95
 378  */
 379 #if defined(sun) && !defined(SVR4)
 380 # undef O_NONBLOCK
 381 #endif
 382
 383 #if !defined(O_NONBLOCK) && defined(O_NDELAY)
 384 # define O_NONBLOCK O_NDELAY
 385 #endif
 386
 387 #if !defined(FNBLOCK) && defined(FNONBLOCK)
 388 # define FNBLOCK FNONBLOCK
 389 #endif
 390 #if !defined(FNBLOCK) && defined(FNDELAY)
 391 # define FNBLOCK FNDELAY
 392 #endif
 393 #if !defined(FNBLOCK) && defined(O_NONBLOCK)
 394 # define FNBLOCK O_NONBLOCK
 395 #endif
 396
 397 #ifndef POSIX
 398 #undef mkfifo
 399 #define mkfifo(n,m) mknod(n,S_IFIFO|(m),0)
 400 #endif
 401
 402 #if !defined(HAVE_LSTAT) && !defined(lstat)
 403 # define lstat stat
 404 #endif
 405
 406 /*****************************************************************
 407  *    signal handling
 408  */
 409
 410 #ifdef SIGVOID
 411 # define SIGRETURN
 412 # define sigret_t void
 413 #else
 414 # define SIGRETURN return 0;
 415 # define sigret_t int
 416 #endif
 417
 418 /* Geeeee, reverse it? */
 419 #if defined(SVR4) || (defined(SYSV) && defined(ISC)) || defined(_AIX) || defined(linux) || defined(ultrix) || defined(__386BSD__) || defined(__bsdi__) || defined(POSIX) || defined(NeXT)
 420 # define SIGHASARG
 421 #endif
 422
 423 #ifdef SIGHASARG
 424 # define SIGPROTOARG   (int)
 425 # define SIGDEFARG     (sigsig) int sigsig;
 426 # define SIGARG        0
 427 #else
 428 # define SIGPROTOARG   (void)
 429 # define SIGDEFARG     ()
 430 # define SIGARG
 431 #endif
 432
 433 #ifndef SIGCHLD
 434 #define SIGCHLD SIGCLD
 435 #endif
 436
 437 #if defined(POSIX) || defined(hpux)
 438 # define signal xsignal
 439 #else
 440 # ifdef USESIGSET
 441 #  define signal sigset
 442 # endif /* USESIGSET */
 443 #endif
 444
 445 /* used in screen.c and attacher.c */
 446 #ifndef NSIG            /* kbeal needs these w/o SYSV */
 447 # define NSIG 32
 448 #endif /* !NSIG */
 449
 450
 451 /*****************************************************************
 452  *    Wait stuff
 453  */
 454
 455 #if (!defined(sysV68) && !defined(M_XENIX)) || defined(NeXT) || defined(M_UNIX)
 456 # include <sys/wait.h>
 457 #endif
 458
 459 #ifndef WTERMSIG
 460 # ifndef BSDWAIT /* if wait is NOT a union: */
 461 #  define WTERMSIG(status) (status & 0177)
 462 # else
 463 #  define WTERMSIG(status) status.w_T.w_Termsig
 464 # endif
 465 #endif
 466
 467 #ifndef WSTOPSIG
 468 # ifndef BSDWAIT /* if wait is NOT a union: */
 469 #  define WSTOPSIG(status) ((status >> 8) & 0377)
 470 # else
 471 #  define WSTOPSIG(status) status.w_S.w_Stopsig
 472 # endif
 473 #endif
 474
 475 /* NET-2 uses WCOREDUMP */
 476 #if defined(WCOREDUMP) && !defined(WIFCORESIG)
 477 # define WIFCORESIG(status) WCOREDUMP(status)
 478 #endif
 479
 480 #ifndef WIFCORESIG
 481 # ifndef BSDWAIT /* if wait is NOT a union: */
 482 #  define WIFCORESIG(status) (status & 0200)
 483 # else
 484 #  define WIFCORESIG(status) status.w_T.w_Coredump
 485 # endif
 486 #endif
 487
 488 #ifndef WEXITSTATUS
 489 # ifndef BSDWAIT /* if wait is NOT a union: */
 490 #  define WEXITSTATUS(status) ((status >> 8) & 0377)
 491 # else
 492 #  define WEXITSTATUS(status) status.w_T.w_Retcode
 493 # endif
 494 #endif
 495
 496
 497 /*****************************************************************
 498  *    select stuff
 499  */
 500
 501 #if defined(M_XENIX) || defined(M_UNIX) || defined(_SEQUENT_)
 502 #include <sys/select.h>         /* for timeval + FD... */
 503 #endif
 504
 505 /*
 506  * SunOS 3.5 - Tom Schmidt - Micron Semiconductor, Inc - 27-Jul-93
 507  * tschmidt@vax.micron.com
 508  */
 509 #ifndef FD_SET
 510 # ifndef SUNOS3
 511 typedef struct fd_set { int fds_bits[1]; } fd_set;
 512 # endif
 513 # define FD_ZERO(fd) ((fd)->fds_bits[0] = 0)
 514 # define FD_SET(b, fd) ((fd)->fds_bits[0] |= 1 << (b))
 515 # define FD_ISSET(b, fd) ((fd)->fds_bits[0] & 1 << (b))
 516 # define FD_SETSIZE 32
 517 #endif
 518
 519
 520 /*****************************************************************
 521  *    user defineable stuff
 522  */
 523
 524 #ifndef TERMCAP_BUFSIZE
 525 # define TERMCAP_BUFSIZE 2048
 526 #endif
 527
 528 #ifndef MAXPATHLEN
 529 # define MAXPATHLEN 1024
 530 #endif
 531
 532 /*
 533  * you may try to vary this value. Use low values if your (VMS) system
 534  * tends to choke when pasting. Use high values if you want to test
 535  * how many characters your pty's can buffer.
 536  */
 537 #define IOSIZE          4096
 538