src/os.h

   1 /* Copyright (c) 2008, 2009
   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 #if !defined(HAVE_LONG_FILE_NAMES) && !defined(NAME_MAX)
  45 #define NAME_MAX 14
  46 #endif
  47
  48 #ifdef ISC
  49 # ifdef ENAMETOOLONG
  50 #  undef ENAMETOOLONG
  51 # endif
  52 # ifdef ENOTEMPTY
  53 #  undef ENOTEMPTY
  54 # endif
  55 # include <sys/bsdtypes.h>
  56 # include <net/errno.h>
  57 #endif
  58
  59 #ifdef sun
  60 # define getpgrp __getpgrp
  61 # define exit __exit
  62 #endif
  63 #ifdef POSIX
  64 # include <unistd.h>
  65 # if defined(__STDC__)
  66 #  include <stdlib.h>
  67 # endif /* __STDC__ */
  68 #endif /* POSIX */
  69 #ifdef sun
  70 # undef getpgrp
  71 # undef exit
  72 #endif /* sun */
  73
  74 #ifndef linux /* all done in <errno.h> */
  75 extern int errno;
  76 #endif /* linux */
  77 #ifndef HAVE_STRERROR
  78 /* No macros, please */
  79 #undef strerror
  80 #endif
  81
  82 #ifdef HAVE_STRINGS_H
  83 # include <strings.h>
  84 #endif
  85 #ifdef HAVE_STRING_H
  86 # include <string.h>
  87 #endif
  88
  89 #ifdef USEVARARGS
  90 # if defined(__STDC__)
  91 #  include <stdarg.h>
  92 #  define VA_LIST(var) va_list var;
  93 #  define VA_DOTS ...
  94 #  define VA_DECL
  95 #  define VA_START(ap, fmt) va_start(ap, fmt)
  96 #  define VA_ARGS(ap) ap
  97 #  define VA_END(ap) va_end(ap)
  98 # else
  99 #  include <varargs.h>
 100 #  define VA_LIST(var) va_list var;
 101 #  define VA_DOTS va_alist
 102 #  define VA_DECL va_dcl
 103 #  define VA_START(ap, fmt) va_start(ap)
 104 #  define VA_ARGS(ap) ap
 105 #  define VA_END(ap) va_end(ap)
 106 # endif
 107 #else
 108 # define VA_LIST(var)
 109 # define VA_DOTS p1, p2, p3, p4, p5, p6
 110 # define VA_DECL unsigned long VA_DOTS;
 111 # define VA_START(ap, fmt)
 112 # define VA_ARGS(ap) VA_DOTS
 113 # define VA_END(ap)
 114 # undef vsnprintf
 115 # define vsnprintf xsnprintf
 116 #endif
 117
 118 #if !defined(sun) && !defined(B43) && !defined(ISC) && !defined(pyr) && !defined(_CX_UX)
 119 # include <time.h>
 120 #endif
 121 #include <sys/time.h>
 122
 123 #ifdef M_UNIX   /* SCO */
 124 # include <sys/stream.h>
 125 # include <sys/ptem.h>
 126 # define ftruncate(fd, s) chsize(fd, s)
 127 #endif
 128
 129 #ifdef SYSV
 130 # define index strchr
 131 # define rindex strrchr
 132 # define bzero(poi,len) memset(poi,0,len)
 133 # define bcmp memcmp
 134 # define killpg(pgrp,sig) kill( -(pgrp), sig)
 135 #endif
 136
 137 #ifndef HAVE_GETCWD
 138 # define getcwd(b,l) getwd(b)
 139 #endif
 140
 141 #ifndef USEBCOPY
 142 # ifdef USEMEMMOVE
 143 #  define bcopy(s,d,len) memmove(d,s,len)
 144 # else
 145 #  ifdef USEMEMCPY
 146 #   define bcopy(s,d,len) memcpy(d,s,len)
 147 #  else
 148 #   define NEED_OWN_BCOPY
 149 #   define bcopy xbcopy
 150 #  endif
 151 # endif
 152 #endif
 153
 154 #if defined(HAVE_SETRESUID) && !defined(HAVE_SETREUID)
 155 # define setreuid(ruid, euid) setresuid(ruid, euid, -1)
 156 # define setregid(rgid, egid) setresgid(rgid, egid, -1)
 157 #endif
 158
 159 #if defined(HAVE_SETEUID) || defined(HAVE_SETREUID) || defined(HAVE_SETRESUID)
 160 # define USE_SETEUID
 161 #endif
 162
 163 #if !defined(HAVE__EXIT) && !defined(_exit)
 164 #define _exit(x) exit(x)
 165 #endif
 166
 167 #ifndef HAVE_UTIMES
 168 # define utimes utime
 169 #endif
 170 #ifndef HAVE_VSNPRINTF
 171 # define vsnprintf xvsnprintf
 172 #endif
 173
 174 #ifdef BUILTIN_TELNET
 175 # include <netinet/in.h>
 176 # include <arpa/inet.h>
 177 #endif
 178
 179 #if defined(USE_LOCALE) && (!defined(HAVE_SETLOCALE) || !defined(HAVE_STRFTIME))
 180 # undef USE_LOCALE
 181 #endif
 182
 183 /*****************************************************************
 184  *    terminal handling
 185  */
 186
 187 #ifdef POSIX
 188 # include <termios.h>
 189 # ifdef hpux
 190 #  include <bsdtty.h>
 191 # endif /* hpux */
 192 # ifdef NCCS
 193 #  define MAXCC NCCS
 194 # else
 195 #  define MAXCC 256
 196 # endif
 197 #else /* POSIX */
 198 # ifdef TERMIO
 199 #  include <termio.h>
 200 #  ifdef NCC
 201 #   define MAXCC NCC
 202 #  else
 203 #   define MAXCC 256
 204 #  endif
 205 #  ifdef CYTERMIO
 206 #   include <cytermio.h>
 207 #  endif
 208 # else /* TERMIO */
 209 #  include <sgtty.h>
 210 # endif /* TERMIO */
 211 #endif /* POSIX */
 212
 213 #ifndef VDISABLE
 214 # ifdef _POSIX_VDISABLE
 215 #  define VDISABLE _POSIX_VDISABLE
 216 # else
 217 #  define VDISABLE 0377
 218 # endif /* _POSIX_VDISABLE */
 219 #endif /* !VDISABLE */
 220
 221
 222 /* on sgi, regardless of the stream head's read mode (RNORM/RMSGN/RMSGD)
 223  * TIOCPKT mode causes data loss if our buffer is too small (IOSIZE)
 224  * to hold the whole packet at first read().
 225  * (Marc Boucher)
 226  *
 227  * matthew green:
 228  * TIOCPKT is broken on dgux 5.4.1 generic AViiON mc88100
 229  *
 230  * Joe Traister: On AIX4, programs like irc won't work if screen
 231  * uses TIOCPKT (select fails to return on pty read).
 232  */
 233 #if defined(sgi) || defined(DGUX) || defined(_IBMR2)
 234 # undef TIOCPKT
 235 #endif
 236
 237 /* linux ncurses is broken, we have to use our own tputs */
 238 #if defined(linux) && defined(TERMINFO)
 239 # define tputs xtputs
 240 #endif
 241
 242 /* Alexandre Oliva: SVR4 style ptys don't work with osf */
 243 #ifdef __osf__
 244 # undef HAVE_SVR4_PTYS
 245 #endif
 246
 247 /*****************************************************************
 248  *   utmp handling
 249  */
 250
 251 #ifdef GETUTENT
 252   typedef char *slot_t;
 253 #else
 254   typedef int slot_t;
 255 #endif
 256
 257 #if defined(UTMPOK) || defined(BUGGYGETLOGIN)
 258 # if defined(SVR4) && !defined(DGUX) && !defined(__hpux) && !defined(linux)
 259 #  include <utmpx.h>
 260 #  define UTMPFILE      UTMPX_FILE
 261 #  define utmp          utmpx
 262 #  define getutent      getutxent
 263 #  define getutid       getutxid
 264 #  define getutline     getutxline
 265 #  define pututline     pututxline
 266 #  define setutent      setutxent
 267 #  define endutent      endutxent
 268 #  define ut_time       ut_xtime
 269 # else /* SVR4 */
 270 #  include <utmp.h>
 271 # endif /* SVR4 */
 272 # ifdef apollo
 273    /*
 274     * We don't have GETUTENT, so we dig into utmp ourselves.
 275     * But we save the permanent filedescriptor and
 276     * open utmp just when we need to.
 277     * This code supports an unsorted utmp. jw.
 278     */
 279 #  define UTNOKEEP
 280 # endif /* apollo */
 281
 282 # ifndef UTMPFILE
 283 #  ifdef UTMP_FILE
 284 #   define UTMPFILE     UTMP_FILE
 285 #  else
 286 #   ifdef _PATH_UTMP
 287 #    define UTMPFILE    _PATH_UTMP
 288 #   else
 289 #    define UTMPFILE    "/etc/utmp"
 290 #   endif /* _PATH_UTMP */
 291 #  endif
 292 # endif
 293
 294 #endif /* UTMPOK || BUGGYGETLOGIN */
 295
 296 #if !defined(UTMPOK) && defined(USRLIMIT)
 297 # undef USRLIMIT
 298 #endif
 299
 300 #ifdef LOGOUTOK
 301 # ifndef LOGINDEFAULT
 302 #  define LOGINDEFAULT 0
 303 # endif
 304 #else
 305 # ifdef LOGINDEFAULT
 306 #  undef LOGINDEFAULT
 307 # endif
 308 # define LOGINDEFAULT 1
 309 #endif
 310
 311
 312 /*****************************************************************
 313  *    file stuff
 314  */
 315
 316 #ifndef F_OK
 317 #define F_OK 0
 318 #endif
 319 #ifndef X_OK
 320 #define X_OK 1
 321 #endif
 322 #ifndef W_OK
 323 #define W_OK 2
 324 #endif
 325 #ifndef R_OK
 326 #define R_OK 4
 327 #endif
 328
 329 #ifndef S_IFIFO
 330 #define S_IFIFO  0010000
 331 #endif
 332 #ifndef S_IREAD
 333 #define S_IREAD  0000400
 334 #endif
 335 #ifndef S_IWRITE
 336 #define S_IWRITE 0000200
 337 #endif
 338 #ifndef S_IEXEC
 339 #define S_IEXEC  0000100
 340 #endif
 341
 342 #if defined(S_IFIFO) && defined(S_IFMT) && !defined(S_ISFIFO)
 343 #define S_ISFIFO(mode) (((mode) & S_IFMT) == S_IFIFO)
 344 #endif
 345 #if defined(S_IFSOCK) && defined(S_IFMT) && !defined(S_ISSOCK)
 346 #define S_ISSOCK(mode) (((mode) & S_IFMT) == S_IFSOCK)
 347 #endif
 348 #if defined(S_IFCHR) && defined(S_IFMT) && !defined(S_ISCHR)
 349 #define S_ISCHR(mode) (((mode) & S_IFMT) == S_IFCHR)
 350 #endif
 351 #if defined(S_IFDIR) && defined(S_IFMT) && !defined(S_ISDIR)
 352 #define S_ISDIR(mode) (((mode) & S_IFMT) == S_IFDIR)
 353 #endif
 354 #if defined(S_IFLNK) && defined(S_IFMT) && !defined(S_ISLNK)
 355 #define S_ISLNK(mode) (((mode) & S_IFMT) == S_IFLNK)
 356 #endif
 357
 358 /*
 359  * SunOS 4.1.3: `man 2V open' has only one line that mentions O_NOBLOCK:
 360  *
 361  *     O_NONBLOCK     Same as O_NDELAY above.
 362  *
 363  * on the very same SunOS 4.1.3, I traced the open system call and found
 364  * that an open("/dev/ttyy08", O_RDWR|O_NONBLOCK|O_NOCTTY) was blocked,
 365  * whereas open("/dev/ttyy08", O_RDWR|O_NDELAY  |O_NOCTTY) went through.
 366  *
 367  * For this simple reason I now favour O_NDELAY. jw. 4.5.95
 368  */
 369 #if defined(sun) && !defined(SVR4)
 370 # undef O_NONBLOCK
 371 #endif
 372
 373 #if !defined(O_NONBLOCK) && defined(O_NDELAY)
 374 # define O_NONBLOCK O_NDELAY
 375 #endif
 376
 377 #if !defined(FNBLOCK) && defined(FNONBLOCK)
 378 # define FNBLOCK FNONBLOCK
 379 #endif
 380 #if !defined(FNBLOCK) && defined(FNDELAY)
 381 # define FNBLOCK FNDELAY
 382 #endif
 383 #if !defined(FNBLOCK) && defined(O_NONBLOCK)
 384 # define FNBLOCK O_NONBLOCK
 385 #endif
 386
 387 #ifndef POSIX
 388 #undef mkfifo
 389 #define mkfifo(n,m) mknod(n,S_IFIFO|(m),0)
 390 #endif
 391
 392 #if !defined(HAVE_LSTAT) && !defined(lstat)
 393 # define lstat stat
 394 #endif
 395
 396 /*****************************************************************
 397  *    signal handling
 398  */
 399
 400 #ifdef SIGVOID
 401 # define SIGRETURN
 402 # define sigret_t void
 403 #else
 404 # define SIGRETURN return 0;
 405 # define sigret_t int
 406 #endif
 407
 408 /* Geeeee, reverse it? */
 409 #if defined(SVR4) || (defined(SYSV) && defined(ISC)) || defined(_AIX) || defined(linux) || defined(ultrix) || defined(__386BSD__) || defined(__bsdi__) || defined(POSIX) || defined(NeXT)
 410 # define SIGHASARG
 411 #endif
 412
 413 #ifdef SIGHASARG
 414 # define SIGPROTOARG   (int)
 415 # define SIGDEFARG     (sigsig) int sigsig;
 416 # define SIGARG        0
 417 #else
 418 # define SIGPROTOARG   (void)
 419 # define SIGDEFARG     ()
 420 # define SIGARG
 421 #endif
 422
 423 #ifndef SIGCHLD
 424 #define SIGCHLD SIGCLD
 425 #endif
 426
 427 #if defined(POSIX) || defined(hpux)
 428 # define signal xsignal
 429 #else
 430 # ifdef USESIGSET
 431 #  define signal sigset
 432 # endif /* USESIGSET */
 433 #endif
 434
 435 /* used in screen.c and attacher.c */
 436 #ifndef NSIG            /* kbeal needs these w/o SYSV */
 437 # define NSIG 32
 438 #endif /* !NSIG */
 439
 440
 441 /*****************************************************************
 442  *    Wait stuff
 443  */
 444
 445 #if (!defined(sysV68) && !defined(M_XENIX)) || defined(NeXT) || defined(M_UNIX)
 446 # include <sys/wait.h>
 447 #endif
 448
 449 #ifndef WTERMSIG
 450 # ifndef BSDWAIT /* if wait is NOT a union: */
 451 #  define WTERMSIG(status) (status & 0177)
 452 # else
 453 #  define WTERMSIG(status) status.w_T.w_Termsig
 454 # endif
 455 #endif
 456
 457 #ifndef WSTOPSIG
 458 # ifndef BSDWAIT /* if wait is NOT a union: */
 459 #  define WSTOPSIG(status) ((status >> 8) & 0377)
 460 # else
 461 #  define WSTOPSIG(status) status.w_S.w_Stopsig
 462 # endif
 463 #endif
 464
 465 /* NET-2 uses WCOREDUMP */
 466 #if defined(WCOREDUMP) && !defined(WIFCORESIG)
 467 # define WIFCORESIG(status) WCOREDUMP(status)
 468 #endif
 469
 470 #ifndef WIFCORESIG
 471 # ifndef BSDWAIT /* if wait is NOT a union: */
 472 #  define WIFCORESIG(status) (status & 0200)
 473 # else
 474 #  define WIFCORESIG(status) status.w_T.w_Coredump
 475 # endif
 476 #endif
 477
 478 #ifndef WEXITSTATUS
 479 # ifndef BSDWAIT /* if wait is NOT a union: */
 480 #  define WEXITSTATUS(status) ((status >> 8) & 0377)
 481 # else
 482 #  define WEXITSTATUS(status) status.w_T.w_Retcode
 483 # endif
 484 #endif
 485
 486
 487 /*****************************************************************
 488  *    select stuff
 489  */
 490
 491 #if defined(M_XENIX) || defined(M_UNIX) || defined(_SEQUENT_)
 492 #include <sys/select.h>         /* for timeval + FD... */
 493 #endif
 494
 495 /*
 496  * SunOS 3.5 - Tom Schmidt - Micron Semiconductor, Inc - 27-Jul-93
 497  * tschmidt@vax.micron.com
 498  */
 499 #ifndef FD_SET
 500 # ifndef SUNOS3
 501 typedef struct fd_set { int fds_bits[1]; } fd_set;
 502 # endif
 503 # define FD_ZERO(fd) ((fd)->fds_bits[0] = 0)
 504 # define FD_SET(b, fd) ((fd)->fds_bits[0] |= 1 << (b))
 505 # define FD_ISSET(b, fd) ((fd)->fds_bits[0] & 1 << (b))
 506 # define FD_SETSIZE 32
 507 #endif
 508
 509
 510 /*****************************************************************
 511  *    user defineable stuff
 512  */
 513
 514 #ifndef TERMCAP_BUFSIZE
 515 # define TERMCAP_BUFSIZE 2048
 516 #endif
 517
 518 #ifndef MAXPATHLEN
 519 # define MAXPATHLEN 1024
 520 #endif
 521
 522 /*
 523  * you may try to vary this value. Use low values if your (VMS) system
 524  * tends to choke when pasting. Use high values if you want to test
 525  * how many characters your pty's can buffer.
 526  */
 527 #define IOSIZE          4096
 528