library/port.c

   1 /*
   2  * Misc. functions for systems that don't have them
   3  *
   4  * Copyright 1996 Alexandre Julliard
   5  */
   6
   7 #include "config.h"
   8
   9 #ifdef __BEOS__
  10 #include <be/kernel/fs_info.h>
  11 #include <be/kernel/OS.h>
  12 #endif
  13
  14 #include <assert.h>
  15 #include <ctype.h>
  16 #include <stdio.h>
  17 #include <stdlib.h>
  18 #include <string.h>
  19 #include <unistd.h>
  20 #include <sys/types.h>
  21 #include <sys/time.h>
  22 #include <sys/stat.h>
  23 #include <sys/ioctl.h>
  24 #include <errno.h>
  25 #include <fcntl.h>
  26 #include <termios.h>
  27 #ifdef HAVE_SYS_MMAN_H
  28 #include <sys/mman.h>
  29 #endif
  30 #ifdef HAVE_LIBIO_H
  31 # include <libio.h>
  32 #endif
  33 #ifdef HAVE_SYSCALL_H
  34 # include <syscall.h>
  35 #endif
  36 #ifdef HAVE_PTY_H
  37 # include <pty.h>
  38 #endif
  39 #ifdef HAVE_LIBUTIL_H
  40 # include <libutil.h>
  41 #endif
  42 #ifdef HAVE_DL_API
  43 # include <dlfcn.h>
  44 #endif
  45
  46 #include "wine/port.h"
  47
  48 /***********************************************************************
  49  *              usleep
  50  */
  51 #ifndef HAVE_USLEEP
  52 unsigned int usleep (unsigned int useconds)
  53 {
  54 #if defined(__EMX__)
  55     DosSleep(useconds);
  56     return 0;
  57 #elif defined(__BEOS__)
  58     return snooze(useconds);
  59 #elif defined(HAVE_SELECT)
  60     struct timeval delay;
  61
  62     delay.tv_sec = useconds / 1000000;
  63     delay.tv_usec = useconds % 1000000;
  64
  65     select( 0, 0, 0, 0, &delay );
  66     return 0;
  67 #else /* defined(__EMX__) || defined(__BEOS__) || defined(HAVE_SELECT) */
  68     errno = ENOSYS;
  69     return -1;
  70 #endif /* defined(__EMX__) || defined(__BEOS__) || defined(HAVE_SELECT) */
  71 }
  72 #endif /* HAVE_USLEEP */
  73
  74 /***********************************************************************
  75  *              memmove
  76  */
  77 #ifndef HAVE_MEMMOVE
  78 void *memmove( void *dest, const void *src, unsigned int len )
  79 {
  80     register char *dst = dest;
  81
  82     /* Use memcpy if not overlapping */
  83     if ((dst + len <= (char *)src) || ((char *)src + len <= dst))
  84     {
  85         memcpy( dst, src, len );
  86     }
  87     /* Otherwise do it the hard way (FIXME: could do better than this) */
  88     else if (dst < src)
  89     {
  90         while (len--) *dst++ = *((char *)src)++;
  91     }
  92     else
  93     {
  94         dst += len - 1;
  95         src = (char *)src + len - 1;
  96         while (len--) *dst-- = *((char *)src)--;
  97     }
  98     return dest;
  99 }
 100 #endif  /* HAVE_MEMMOVE */
 101
 102 /***********************************************************************
 103  *              strerror
 104  */
 105 #ifndef HAVE_STRERROR
 106 const char *strerror( int err )
 107 {
 108     /* Let's hope we have sys_errlist then */
 109     return sys_errlist[err];
 110 }
 111 #endif  /* HAVE_STRERROR */
 112
 113
 114 /***********************************************************************
 115  *              getpagesize
 116  */
 117 #ifndef HAVE_GETPAGESIZE
 118 size_t getpagesize(void)
 119 {
 120 # ifdef __svr4__
 121     return sysconf(_SC_PAGESIZE);
 122 # else
 123 #  error Cannot get the page size on this platform
 124 # endif
 125 }
 126 #endif  /* HAVE_GETPAGESIZE */
 127
 128
 129 /***********************************************************************
 130  *              clone
 131  */
 132 #if !defined(HAVE_CLONE) && defined(__linux__)
 133 int clone( int (*fn)(void *), void *stack, int flags, void *arg )
 134 {
 135 #ifdef __i386__
 136     int ret;
 137     void **stack_ptr = (void **)stack;
 138     *--stack_ptr = arg;  /* Push argument on stack */
 139     *--stack_ptr = fn;   /* Push function pointer (popped into ebx) */
 140     __asm__ __volatile__( "pushl %%ebx\n\t"
 141                           "movl %2,%%ebx\n\t"
 142                           "int $0x80\n\t"
 143                           "popl %%ebx\n\t"   /* Contains fn in the child */
 144                           "testl %%eax,%%eax\n\t"
 145                           "jnz 0f\n\t"
 146                           "xorl %ebp,%ebp\n\t"    /* Terminate the stack frames */
 147                           "call *%%ebx\n\t"       /* Should never return */
 148                           "xorl %%eax,%%eax\n\t"  /* Just in case it does*/
 149                           "0:"
 150                           : "=a" (ret)
 151                           : "0" (SYS_clone), "r" (flags), "c" (stack_ptr) );
 152     assert( ret );  /* If ret is 0, we returned from the child function */
 153     if (ret > 0) return ret;
 154     errno = -ret;
 155     return -1;
 156 #else
 157     errno = EINVAL;
 158     return -1;
 159 #endif  /* __i386__ */
 160 }
 161 #endif  /* !HAVE_CLONE && __linux__ */
 162
 163 /***********************************************************************
 164  *              strcasecmp
 165  */
 166 #ifndef HAVE_STRCASECMP
 167 int strcasecmp( const char *str1, const char *str2 )
 168 {
 169     const unsigned char *ustr1 = (const unsigned char *)str1;
 170     const unsigned char *ustr2 = (const unsigned char *)str2;
 171
 172     while (*ustr1 && toupper(*ustr1) == toupper(*ustr2)) {
 173         ustr1++;
 174         ustr2++;
 175     }
 176     return toupper(*ustr1) - toupper(*ustr2);
 177 }
 178 #endif /* HAVE_STRCASECMP */
 179
 180 /***********************************************************************
 181  *              strncasecmp
 182  */
 183 #ifndef HAVE_STRNCASECMP
 184 int strncasecmp( const char *str1, const char *str2, size_t n )
 185 {
 186     const unsigned char *ustr1 = (const unsigned char *)str1;
 187     const unsigned char *ustr2 = (const unsigned char *)str2;
 188     int res;
 189
 190     if (!n) return 0;
 191     while ((--n > 0) && *ustr1) {
 192         if ((res = toupper(*ustr1) - toupper(*ustr2))) return res;
 193         ustr1++;
 194         ustr2++;
 195     }
 196     return toupper(*ustr1) - toupper(*ustr2);
 197 }
 198 #endif /* HAVE_STRNCASECMP */
 199
 200 /***********************************************************************
 201  *              wine_openpty
 202  * NOTE
 203  *   It looks like the openpty that comes with glibc in RedHat 5.0
 204  *   is buggy (second call returns what looks like a dup of 0 and 1
 205  *   instead of a new pty), this is a generic replacement.
 206  *
 207  * FIXME
 208  *   We should have a autoconf check for this.
 209  */
 210 int wine_openpty(int *master, int *slave, char *name,
 211                  struct termios *term, struct winsize *winsize)
 212 {
 213 #ifdef HAVE_OPENPTY
 214     return openpty(master, slave, name, term, winsize);
 215 #else
 216     const char *ptr1, *ptr2;
 217     char pts_name[512];
 218
 219     strcpy (pts_name, "/dev/ptyXY");
 220
 221     for (ptr1 = "pqrstuvwxyzPQRST"; *ptr1 != 0; ptr1++) {
 222         pts_name[8] = *ptr1;
 223         for (ptr2 = "0123456789abcdef"; *ptr2 != 0; ptr2++) {
 224             pts_name[9] = *ptr2;
 225
 226             if ((*master = open(pts_name, O_RDWR)) < 0) {
 227                 if (errno == ENOENT)
 228                     return -1;
 229                 else
 230                     continue;
 231             }
 232             pts_name[5] = 't';
 233             if ((*slave = open(pts_name, O_RDWR)) < 0) {
 234                 pts_name[5] = 'p';
 235                 close (*master);
 236                 continue;
 237             }
 238
 239             if (term != NULL)
 240                 tcsetattr(*slave, TCSANOW, term);
 241             if (winsize != NULL)
 242                 ioctl(*slave, TIOCSWINSZ, winsize);
 243             if (name != NULL)
 244                 strcpy(name, pts_name);
 245             return *slave;
 246         }
 247     }
 248     errno = EMFILE;
 249     return -1;
 250 #endif
 251 }
 252
 253 /***********************************************************************
 254  *              getnetbyaddr
 255  */
 256 #ifndef HAVE_GETNETBYADDR
 257 struct netent *getnetbyaddr(unsigned long net, int type)
 258 {
 259     errno = ENOSYS;
 260     return NULL;
 261 }
 262 #endif /* defined(HAVE_GETNETBYNAME) */
 263
 264 /***********************************************************************
 265  *              getnetbyname
 266  */
 267 #ifndef HAVE_GETNETBYNAME
 268 struct netent *getnetbyname(const char *name)
 269 {
 270     errno = ENOSYS;
 271     return NULL;
 272 }
 273 #endif /* defined(HAVE_GETNETBYNAME) */
 274
 275 /***********************************************************************
 276  *              getprotobyname
 277  */
 278 #ifndef HAVE_GETPROTOBYNAME
 279 struct protoent *getprotobyname(const char *name)
 280 {
 281     errno = ENOSYS;
 282     return NULL;
 283 }
 284 #endif /* !defined(HAVE_GETPROTOBYNAME) */
 285
 286 /***********************************************************************
 287  *              getprotobynumber
 288  */
 289 #ifndef HAVE_GETPROTOBYNUMBER
 290 struct protoent *getprotobynumber(int proto)
 291 {
 292     errno = ENOSYS;
 293     return NULL;
 294 }
 295 #endif /* !defined(HAVE_GETPROTOBYNUMBER) */
 296
 297 /***********************************************************************
 298  *              getservbyport
 299  */
 300 #ifndef HAVE_GETSERVBYPORT
 301 struct servent *getservbyport(int port, const char *proto)
 302 {
 303     errno = ENOSYS;
 304     return NULL;
 305 }
 306 #endif /* !defined(HAVE_GETSERVBYPORT) */
 307
 308 /***********************************************************************
 309  *              getsockopt
 310  */
 311 #ifndef HAVE_GETSOCKOPT
 312 int getsockopt(int socket, int level, int option_name,
 313                void *option_value, size_t *option_len)
 314 {
 315     errno = ENOSYS;
 316     return -1;
 317 }
 318 #endif /* !defined(HAVE_GETSOCKOPT) */
 319
 320 /***********************************************************************
 321  *              inet_network
 322  */
 323 #ifndef HAVE_INET_NETWORK
 324 unsigned long inet_network(const char *cp)
 325 {
 326     errno = ENOSYS;
 327     return 0;
 328 }
 329 #endif /* defined(HAVE_INET_NETWORK) */
 330
 331 /***********************************************************************
 332  *              settimeofday
 333  */
 334 #ifndef HAVE_SETTIMEOFDAY
 335 int settimeofday(struct timeval *tp, void *reserved)
 336 {
 337     tp->tv_sec = 0;
 338     tp->tv_usec = 0;
 339
 340     errno = ENOSYS;
 341     return -1;
 342 }
 343 #endif /* HAVE_SETTIMEOFDAY */
 344
 345 /***********************************************************************
 346  *              statfs
 347  */
 348 #ifndef HAVE_STATFS
 349 int statfs(const char *name, struct statfs *info)
 350 {
 351 #ifdef __BEOS__
 352     dev_t mydev;
 353     fs_info fsinfo;
 354
 355     if(!info) {
 356         errno = ENOSYS;
 357         return -1;
 358     }
 359
 360     if ((mydev = dev_for_path(name)) < 0) {
 361         errno = ENOSYS;
 362         return -1;
 363     }
 364
 365     if (fs_stat_dev(mydev,&fsinfo) < 0) {
 366         errno = ENOSYS;
 367         return -1;
 368     }
 369
 370     info->f_bsize = fsinfo.block_size;
 371     info->f_blocks = fsinfo.total_blocks;
 372     info->f_bfree = fsinfo.free_blocks;
 373     return 0;
 374 #else /* defined(__BEOS__) */
 375     errno = ENOSYS;
 376     return -1;
 377 #endif /* defined(__BEOS__) */
 378 }
 379 #endif /* !defined(HAVE_STATFS) */
 380
 381
 382 /***********************************************************************
 383  *              lstat
 384  */
 385 #ifndef HAVE_LSTAT
 386 int lstat(const char *file_name, struct stat *buf)
 387 {
 388     return stat( file_name, buf );
 389 }
 390 #endif /* HAVE_LSTAT */
 391
 392
 393 /***********************************************************************
 394  *              getrlimit
 395  */
 396 #ifndef HAVE_GETRLIMIT
 397 int getrlimit (int resource, struct rlimit *rlim)
 398 {
 399     return -1; /* FAIL */
 400 }
 401 #endif /* HAVE_GETRLIMIT */
 402
 403 /***********************************************************************
 404  *              wine_anon_mmap
 405  *
 406  * Portable wrapper for anonymous mmaps
 407  */
 408 void *wine_anon_mmap( void *start, size_t size, int prot, int flags )
 409 {
 410     static int fdzero = -1;
 411
 412 #ifdef MAP_ANON
 413     flags |= MAP_ANON;
 414 #else
 415     if (fdzero == -1)
 416     {
 417         if ((fdzero = open( "/dev/zero", O_RDONLY )) == -1)
 418         {
 419             perror( "/dev/zero: open" );
 420             exit(1);
 421         }
 422     }
 423 #endif  /* MAP_ANON */
 424
 425 #ifdef MAP_SHARED
 426     flags &= ~MAP_SHARED;
 427 #endif
 428
 429     /* Linux EINVAL's on us if we don't pass MAP_PRIVATE to an anon mmap */
 430 #ifdef MAP_PRIVATE
 431     flags |= MAP_PRIVATE;
 432 #endif
 433
 434     return mmap( start, size, prot, flags, fdzero, 0 );
 435 }
 436
 437
 438 /*
 439  * These functions provide wrappers around dlopen() and associated
 440  * functions.  They work around a bug in glibc 2.1.x where calling
 441  * a dl*() function after a previous dl*() function has failed
 442  * without a dlerror() call between the two will cause a crash.
 443  * They all take a pointer to a buffer that
 444  * will receive the error description (from dlerror()).  This
 445  * parameter may be NULL if the error description is not required.
 446  */
 447
 448 /***********************************************************************
 449  *              wine_dlopen
 450  */
 451 void *wine_dlopen( const char *filename, int flag, char *error, int errorsize )
 452 {
 453 #ifdef HAVE_DL_API
 454     void *ret;
 455     char *s;
 456     dlerror(); dlerror();
 457     ret = dlopen( filename, flag );
 458     s = dlerror();
 459     if (error)
 460     {
 461         strncpy( error, s ? s : "", errorsize );
 462         error[errorsize - 1] = '\0';
 463     }
 464     dlerror();
 465     return ret;
 466 #else
 467     if (error)
 468     {
 469         strncpy( error, "dlopen interface not detected by configure", errorsize );
 470         error[errorsize - 1] = '\0';
 471     }
 472     return NULL;
 473 #endif
 474 }
 475
 476 /***********************************************************************
 477  *              wine_dlsym
 478  */
 479 void *wine_dlsym( void *handle, const char *symbol, char *error, int errorsize )
 480 {
 481 #ifdef HAVE_DL_API
 482     void *ret;
 483     char *s;
 484     dlerror(); dlerror();
 485     ret = dlsym( handle, symbol );
 486     s = dlerror();
 487     if (error)
 488     {
 489         strncpy( error, s ? s : "", errorsize );
 490         error[errorsize - 1] = '\0';
 491     }
 492     dlerror();
 493     return ret;
 494 #else
 495     if (error)
 496     {
 497         strncpy( error, "dlopen interface not detected by configure", errorsize );
 498         error[errorsize - 1] = '\0';
 499     }
 500     return NULL;
 501 #endif
 502 }
 503
 504 /***********************************************************************
 505  *              wine_dlclose
 506  */
 507 int wine_dlclose( void *handle, char *error, int errorsize )
 508 {
 509 #ifdef HAVE_DL_API
 510     int ret;
 511     char *s;
 512     dlerror(); dlerror();
 513     ret = dlclose( handle );
 514     s = dlerror();
 515     if (error)
 516     {
 517         strncpy( error, s ? s : "", errorsize );
 518         error[errorsize - 1] = '\0';
 519     }
 520     dlerror();
 521     return ret;
 522 #else
 523     if (error)
 524     {
 525         strncpy( error, "dlopen interface not detected by configure", errorsize );
 526         error[errorsize - 1] = '\0';
 527     }
 528     return 1;
 529 #endif
 530 }
 531
 532 /***********************************************************************
 533  *              wine_rewrite_s4tos2
 534  *
 535  * Convert 4 byte Unicode strings to 2 byte Unicode strings in-place.
 536  * This is only practical if literal strings are writable.
 537  */
 538 unsigned short* wine_rewrite_s4tos2(const wchar_t* str4 )
 539 {
 540     unsigned short *str2,*s2;
 541
 542     if (str4==NULL)
 543       return NULL;
 544
 545     if ((*str4 & 0xffff0000) != 0) {
 546         /* This string has already been converted. Return it as is */
 547         return (unsigned short*)str4;
 548     }
 549
 550     /* Note that we can also end up here if the string has a single
 551      * character. In such a case we will convert the string over and
 552      * over again. But this is harmless.
 553      */
 554     str2=s2=(unsigned short*)str4;
 555     do {
 556         *s2=(unsigned short)*str4;
 557         s2++;
 558     } while (*str4++ != L'\0');
 559
 560     return str2;
 561 }
 562
 563 #ifndef HAVE_ECVT
 564 /*
 565  * NetBSD 1.5 doesn't have ecvt, fcvt, gcvt. We just check for ecvt, though.
 566  * Fix/verify these implementations !
 567  */
 568
 569 /***********************************************************************
 570  *              ecvt
 571  */
 572 char *ecvt (double number, int  ndigits,  int  *decpt,  int *sign)
 573 {
 574     static buf[40]; /* ought to be enough */
 575     char *dec;
 576     sprintf(buf, "%.*e", ndigits /* FIXME wrong */, number);
 577     *sign = (number < 0);
 578     dec = strchr(buf, '.');
 579     *decpt = (dec) ? (int)dec - (int)buf : -1;
 580     return buf;
 581 }
 582
 583 /***********************************************************************
 584  *              fcvt
 585  */
 586 char *fcvt (double number, int  ndigits,  int  *decpt,  int *sign)
 587 {
 588     static buf[40]; /* ought to be enough */
 589     char *dec;
 590     sprintf(buf, "%.*e", ndigits, number);
 591     *sign = (number < 0);
 592     dec = strchr(buf, '.');
 593     *decpt = (dec) ? (int)dec - (int)buf : -1;
 594     return buf;
 595 }
 596
 597 /***********************************************************************
 598  *              gcvt
 599  *
 600  * FIXME: uses both E and F.
 601  */
 602 char *gcvt (double number, size_t  ndigit,  char *buff)
 603 {
 604     sprintf(buff, "%.*E", ndigit, number);
 605     return buff;
 606 }
 607 #endif /* HAVE_ECVT */