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  * $Id$ GNU
  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 /* Alexandre Oliva: SVR4 style ptys don't work with osf */
 238 #ifdef __osf__
 239 # undef HAVE_SVR4_PTYS
 240 #endif
 241
 242 /*****************************************************************
 243  *   utmp handling
 244  */
 245
 246 #ifdef GETUTENT
 247   typedef char *slot_t;
 248 #else
 249   typedef int slot_t;
 250 #endif
 251
 252 #if defined(UTMPOK) || defined(BUGGYGETLOGIN)
 253 # if defined(SVR4) && !defined(DGUX) && !defined(__hpux)
 254 #  include <utmpx.h>
 255 #  ifdef UTMPX_FILE /* GNU extension */
 256 #   define UTMPFILE     UTMPX_FILE
 257 #  endif
 258 #  define utmp          utmpx
 259 #  define getutent      getutxent
 260 #  define getutid       getutxid
 261 #  define getutline     getutxline
 262 #  define pututline     pututxline
 263 #  define setutent      setutxent
 264 #  define endutent      endutxent
 265 # else /* SVR4 */
 266 #  include <utmp.h>
 267 # endif /* SVR4 */
 268 # ifdef apollo
 269    /*
 270     * We don't have GETUTENT, so we dig into utmp ourselves.
 271     * But we save the permanent filedescriptor and
 272     * open utmp just when we need to.
 273     * This code supports an unsorted utmp. jw.
 274     */
 275 #  define UTNOKEEP
 276 # endif /* apollo */
 277
 278 # ifndef UTMPFILE
 279 #  ifdef UTMP_FILE
 280 #   define UTMPFILE     UTMP_FILE
 281 #  else
 282 #   ifdef _PATH_UTMP
 283 #    define UTMPFILE    _PATH_UTMP
 284 #   else
 285 #    define UTMPFILE    "/etc/utmp"
 286 #   endif /* _PATH_UTMP */
 287 #  endif
 288 # endif
 289
 290 #endif /* UTMPOK || BUGGYGETLOGIN */
 291
 292 #if !defined(UTMPOK) && defined(USRLIMIT)
 293 # undef USRLIMIT
 294 #endif
 295
 296 #ifdef LOGOUTOK
 297 # ifndef LOGINDEFAULT
 298 #  define LOGINDEFAULT 0
 299 # endif
 300 #else
 301 # ifdef LOGINDEFAULT
 302 #  undef LOGINDEFAULT
 303 # endif
 304 # define LOGINDEFAULT 1
 305 #endif
 306
 307
 308 /*****************************************************************
 309  *    file stuff
 310  */
 311
 312 #ifndef F_OK
 313 #define F_OK 0
 314 #endif
 315 #ifndef X_OK
 316 #define X_OK 1
 317 #endif
 318 #ifndef W_OK
 319 #define W_OK 2
 320 #endif
 321 #ifndef R_OK
 322 #define R_OK 4
 323 #endif
 324
 325 #ifndef S_IFIFO
 326 #define S_IFIFO  0010000
 327 #endif
 328 #ifndef S_IREAD
 329 #define S_IREAD  0000400
 330 #endif
 331 #ifndef S_IWRITE
 332 #define S_IWRITE 0000200
 333 #endif
 334 #ifndef S_IEXEC
 335 #define S_IEXEC  0000100
 336 #endif
 337
 338 #if defined(S_IFIFO) && defined(S_IFMT) && !defined(S_ISFIFO)
 339 #define S_ISFIFO(mode) (((mode) & S_IFMT) == S_IFIFO)
 340 #endif
 341 #if defined(S_IFSOCK) && defined(S_IFMT) && !defined(S_ISSOCK)
 342 #define S_ISSOCK(mode) (((mode) & S_IFMT) == S_IFSOCK)
 343 #endif
 344 #if defined(S_IFCHR) && defined(S_IFMT) && !defined(S_ISCHR)
 345 #define S_ISCHR(mode) (((mode) & S_IFMT) == S_IFCHR)
 346 #endif
 347 #if defined(S_IFDIR) && defined(S_IFMT) && !defined(S_ISDIR)
 348 #define S_ISDIR(mode) (((mode) & S_IFMT) == S_IFDIR)
 349 #endif
 350 #if defined(S_IFLNK) && defined(S_IFMT) && !defined(S_ISLNK)
 351 #define S_ISLNK(mode) (((mode) & S_IFMT) == S_IFLNK)
 352 #endif
 353
 354 /*
 355  * SunOS 4.1.3: `man 2V open' has only one line that mentions O_NOBLOCK:
 356  *
 357  *     O_NONBLOCK     Same as O_NDELAY above.
 358  *
 359  * on the very same SunOS 4.1.3, I traced the open system call and found
 360  * that an open("/dev/ttyy08", O_RDWR|O_NONBLOCK|O_NOCTTY) was blocked,
 361  * whereas open("/dev/ttyy08", O_RDWR|O_NDELAY  |O_NOCTTY) went through.
 362  *
 363  * For this simple reason I now favour O_NDELAY. jw. 4.5.95
 364  */
 365 #if defined(sun) && !defined(SVR4)
 366 # undef O_NONBLOCK
 367 #endif
 368
 369 #if !defined(O_NONBLOCK) && defined(O_NDELAY)
 370 # define O_NONBLOCK O_NDELAY
 371 #endif
 372
 373 #if !defined(FNBLOCK) && defined(FNONBLOCK)
 374 # define FNBLOCK FNONBLOCK
 375 #endif
 376 #if !defined(FNBLOCK) && defined(FNDELAY)
 377 # define FNBLOCK FNDELAY
 378 #endif
 379 #if !defined(FNBLOCK) && defined(O_NONBLOCK)
 380 # define FNBLOCK O_NONBLOCK
 381 #endif
 382
 383 #ifndef POSIX
 384 #undef mkfifo
 385 #define mkfifo(n,m) mknod(n,S_IFIFO|(m),0)
 386 #endif
 387
 388 #if !defined(HAVE_LSTAT) && !defined(lstat)
 389 # define lstat stat
 390 #endif
 391
 392 /*****************************************************************
 393  *    signal handling
 394  */
 395
 396 #ifdef SIGVOID
 397 # define SIGRETURN
 398 # define sigret_t void
 399 #else
 400 # define SIGRETURN return 0;
 401 # define sigret_t int
 402 #endif
 403
 404 /* Geeeee, reverse it? */
 405 #if defined(SVR4) || (defined(SYSV) && defined(ISC)) || defined(_AIX) || defined(linux) || defined(ultrix) || defined(__386BSD__) || defined(__bsdi__) || defined(POSIX) || defined(NeXT)
 406 # define SIGHASARG
 407 #endif
 408
 409 #ifdef SIGHASARG
 410 # define SIGPROTOARG   (int)
 411 # define SIGDEFARG     (sigsig) int sigsig;
 412 # define SIGARG        0
 413 #else
 414 # define SIGPROTOARG   (void)
 415 # define SIGDEFARG     ()
 416 # define SIGARG
 417 #endif
 418
 419 #ifndef SIGCHLD
 420 #define SIGCHLD SIGCLD
 421 #endif
 422
 423 #if defined(POSIX) || defined(hpux)
 424 # define signal xsignal
 425 #else
 426 # ifdef USESIGSET
 427 #  define signal sigset
 428 # endif /* USESIGSET */
 429 #endif
 430
 431 /* used in screen.c and attacher.c */
 432 #ifndef NSIG            /* kbeal needs these w/o SYSV */
 433 # define NSIG 32
 434 #endif /* !NSIG */
 435
 436
 437 /*****************************************************************
 438  *    Wait stuff
 439  */
 440
 441 #if (!defined(sysV68) && !defined(M_XENIX)) || defined(NeXT) || defined(M_UNIX)
 442 # include <sys/wait.h>
 443 #endif
 444
 445 #ifndef WTERMSIG
 446 # ifndef BSDWAIT /* if wait is NOT a union: */
 447 #  define WTERMSIG(status) (status & 0177)
 448 # else
 449 #  define WTERMSIG(status) status.w_T.w_Termsig
 450 # endif
 451 #endif
 452
 453 #ifndef WSTOPSIG
 454 # ifndef BSDWAIT /* if wait is NOT a union: */
 455 #  define WSTOPSIG(status) ((status >> 8) & 0377)
 456 # else
 457 #  define WSTOPSIG(status) status.w_S.w_Stopsig
 458 # endif
 459 #endif
 460
 461 /* NET-2 uses WCOREDUMP */
 462 #if defined(WCOREDUMP) && !defined(WIFCORESIG)
 463 # define WIFCORESIG(status) WCOREDUMP(status)
 464 #endif
 465
 466 #ifndef WIFCORESIG
 467 # ifndef BSDWAIT /* if wait is NOT a union: */
 468 #  define WIFCORESIG(status) (status & 0200)
 469 # else
 470 #  define WIFCORESIG(status) status.w_T.w_Coredump
 471 # endif
 472 #endif
 473
 474 #ifndef WEXITSTATUS
 475 # ifndef BSDWAIT /* if wait is NOT a union: */
 476 #  define WEXITSTATUS(status) ((status >> 8) & 0377)
 477 # else
 478 #  define WEXITSTATUS(status) status.w_T.w_Retcode
 479 # endif
 480 #endif
 481
 482
 483 /*****************************************************************
 484  *    select stuff
 485  */
 486
 487 #if defined(M_XENIX) || defined(M_UNIX) || defined(_SEQUENT_)
 488 #include <sys/select.h>         /* for timeval + FD... */
 489 #endif
 490
 491 /*
 492  * SunOS 3.5 - Tom Schmidt - Micron Semiconductor, Inc - 27-Jul-93
 493  * tschmidt@vax.micron.com
 494  */
 495 #ifndef FD_SET
 496 # ifndef SUNOS3
 497 typedef struct fd_set { int fds_bits[1]; } fd_set;
 498 # endif
 499 # define FD_ZERO(fd) ((fd)->fds_bits[0] = 0)
 500 # define FD_SET(b, fd) ((fd)->fds_bits[0] |= 1 << (b))
 501 # define FD_ISSET(b, fd) ((fd)->fds_bits[0] & 1 << (b))
 502 # define FD_SETSIZE 32
 503 #endif
 504
 505
 506 /*****************************************************************
 507  *    user defineable stuff
 508  */
 509
 510 #ifndef TERMCAP_BUFSIZE
 511 # define TERMCAP_BUFSIZE 2048
 512 #endif
 513
 514 #ifndef MAXPATHLEN
 515 # define MAXPATHLEN 1024
 516 #endif
 517
 518 /*
 519  * you may try to vary this value. Use low values if your (VMS) system
 520  * tends to choke when pasting. Use high values if you want to test
 521  * how many characters your pty's can buffer.
 522  */
 523 #define IOSIZE          4096
 524
 525 /* Changing those you won't be able to attach to your old sessions
 526  * when changing those values in official tree don't forget to bump
 527  * MSG_VERSION */
 528 #define MAXTERMLEN      32
 529 #define MAXLOGINLEN     256
 530