src/include/port.h

   1 /*-------------------------------------------------------------------------
   2  *
   3  * port.h
   4  *        Header for src/port/ compatibility functions.
   5  *
   6  * Portions Copyright (c) 1996-2009, PostgreSQL Global Development Group
   7  * Portions Copyright (c) 1994, Regents of the University of California
   8  *
   9  * $PostgreSQL$
  10  *
  11  *-------------------------------------------------------------------------
  12  */
  13 #ifndef PG_PORT_H
  14 #define PG_PORT_H
  15
  16 #include <ctype.h>
  17 #include <netdb.h>
  18 #include <pwd.h>
  19
  20 /* non-blocking */
  21 extern bool pg_set_noblock(int sock);
  22 extern bool pg_set_block(int sock);
  23
  24 /* Portable path handling for Unix/Win32 (in path.c) */
  25
  26 extern char *first_dir_separator(const char *filename);
  27 extern char *last_dir_separator(const char *filename);
  28 extern char *first_path_separator(const char *pathlist);
  29 extern void join_path_components(char *ret_path,
  30                                          const char *head, const char *tail);
  31 extern void canonicalize_path(char *path);
  32 extern void make_native_path(char *path);
  33 extern bool path_contains_parent_reference(const char *path);
  34 extern bool path_is_prefix_of_path(const char *path1, const char *path2);
  35 extern const char *get_progname(const char *argv0);
  36 extern void get_share_path(const char *my_exec_path, char *ret_path);
  37 extern void get_etc_path(const char *my_exec_path, char *ret_path);
  38 extern void get_include_path(const char *my_exec_path, char *ret_path);
  39 extern void get_pkginclude_path(const char *my_exec_path, char *ret_path);
  40 extern void get_includeserver_path(const char *my_exec_path, char *ret_path);
  41 extern void get_lib_path(const char *my_exec_path, char *ret_path);
  42 extern void get_pkglib_path(const char *my_exec_path, char *ret_path);
  43 extern void get_locale_path(const char *my_exec_path, char *ret_path);
  44 extern void get_doc_path(const char *my_exec_path, char *ret_path);
  45 extern void get_html_path(const char *my_exec_path, char *ret_path);
  46 extern void get_man_path(const char *my_exec_path, char *ret_path);
  47 extern bool get_home_path(char *ret_path);
  48 extern void get_parent_directory(char *path);
  49
  50 /* port/dirmod.c */
  51 extern char **pgfnames(const char *path);
  52 extern void pgfnames_cleanup(char **filenames);
  53
  54 /*
  55  *      is_absolute_path
  56  *
  57  *      By making this a macro we avoid needing to include path.c in libpq.
  58  */
  59 #ifndef WIN32
  60 #define is_absolute_path(filename) \
  61 ( \
  62         ((filename)[0] == '/') \
  63 )
  64 #else
  65 #define is_absolute_path(filename) \
  66 ( \
  67         ((filename)[0] == '/') || \
  68         (filename)[0] == '\\' || \
  69         (isalpha((unsigned char) ((filename)[0])) && (filename)[1] == ':' && \
  70         ((filename)[2] == '\\' || (filename)[2] == '/')) \
  71 )
  72 #endif
  73
  74 /* Portable locale initialization (in exec.c) */
  75 extern void set_pglocale_pgservice(const char *argv0, const char *app);
  76
  77 /* Portable way to find binaries (in exec.c) */
  78 extern int      find_my_exec(const char *argv0, char *retpath);
  79 extern int find_other_exec(const char *argv0, const char *target,
  80                                 const char *versionstr, char *retpath);
  81
  82 /* Windows security token manipulation (in exec.c) */
  83 #ifdef WIN32
  84 extern BOOL AddUserToDacl(HANDLE hProcess);
  85 #endif
  86
  87
  88 #if defined(WIN32) || defined(__CYGWIN__)
  89 #define EXE ".exe"
  90 #else
  91 #define EXE ""
  92 #endif
  93
  94 #if defined(WIN32) && !defined(__CYGWIN__)
  95 #define DEVNULL "nul"
  96 /* "con" does not work from the Msys 1.0.10 console (part of MinGW). */
  97 #define DEVTTY  "con"
  98 #else
  99 #define DEVNULL "/dev/null"
 100 #define DEVTTY "/dev/tty"
 101 #endif
 102
 103 /*
 104  *      Win32 needs double quotes at the beginning and end of system()
 105  *      strings.  If not, it gets confused with multiple quoted strings.
 106  *      It also requires double-quotes around the executable name and
 107  *      any files used for redirection.  Other args can use single-quotes.
 108  *
 109  *      Generated using Win32 "CMD /?":
 110  *
 111  *      1. If all of the following conditions are met, then quote characters
 112  *      on the command line are preserved:
 113  *
 114  *       - no /S switch
 115  *       - exactly two quote characters
 116  *       - no special characters between the two quote characters, where special
 117  *         is one of: &<>()@^|
 118  *       - there are one or more whitespace characters between the the two quote
 119  *         characters
 120  *       - the string between the two quote characters is the name of an
 121  *         executable file.
 122  *
 123  *       2. Otherwise, old behavior is to see if the first character is a quote
 124  *       character and if so, strip the leading character and remove the last
 125  *       quote character on the command line, preserving any text after the last
 126  *       quote character.
 127  */
 128 #if defined(WIN32) && !defined(__CYGWIN__)
 129 #define SYSTEMQUOTE "\""
 130 #else
 131 #define SYSTEMQUOTE ""
 132 #endif
 133
 134 /* Portable delay handling */
 135 extern void pg_usleep(long microsec);
 136
 137 /* Portable SQL-like case-independent comparisons and conversions */
 138 extern int      pg_strcasecmp(const char *s1, const char *s2);
 139 extern int      pg_strncasecmp(const char *s1, const char *s2, size_t n);
 140 extern unsigned char pg_toupper(unsigned char ch);
 141 extern unsigned char pg_tolower(unsigned char ch);
 142
 143 #ifdef USE_REPL_SNPRINTF
 144
 145 /*
 146  * Versions of libintl >= 0.13 try to replace printf() and friends with
 147  * macros to their own versions that understand the %$ format.  We do the
 148  * same, so disable their macros, if they exist.
 149  */
 150 #ifdef vsnprintf
 151 #undef vsnprintf
 152 #endif
 153 #ifdef snprintf
 154 #undef snprintf
 155 #endif
 156 #ifdef sprintf
 157 #undef sprintf
 158 #endif
 159 #ifdef vfprintf
 160 #undef vfprintf
 161 #endif
 162 #ifdef fprintf
 163 #undef fprintf
 164 #endif
 165 #ifdef printf
 166 #undef printf
 167 #endif
 168
 169 extern int      pg_vsnprintf(char *str, size_t count, const char *fmt, va_list args);
 170 extern int
 171 pg_snprintf(char *str, size_t count, const char *fmt,...)
 172 /* This extension allows gcc to check the format string */
 173 __attribute__((format(printf, 3, 4)));
 174 extern int
 175 pg_sprintf(char *str, const char *fmt,...)
 176 /* This extension allows gcc to check the format string */
 177 __attribute__((format(printf, 2, 3)));
 178 extern int      pg_vfprintf(FILE *stream, const char *fmt, va_list args);
 179 extern int
 180 pg_fprintf(FILE *stream, const char *fmt,...)
 181 /* This extension allows gcc to check the format string */
 182 __attribute__((format(printf, 2, 3)));
 183 extern int
 184 pg_printf(const char *fmt,...)
 185 /* This extension allows gcc to check the format string */
 186 __attribute__((format(printf, 1, 2)));
 187
 188 /*
 189  *      The GCC-specific code below prevents the __attribute__(... 'printf')
 190  *      above from being replaced, and this is required because gcc doesn't
 191  *      know anything about pg_printf.
 192  */
 193 #ifdef __GNUC__
 194 #define vsnprintf(...)  pg_vsnprintf(__VA_ARGS__)
 195 #define snprintf(...)   pg_snprintf(__VA_ARGS__)
 196 #define sprintf(...)    pg_sprintf(__VA_ARGS__)
 197 #define vfprintf(...)   pg_vfprintf(__VA_ARGS__)
 198 #define fprintf(...)    pg_fprintf(__VA_ARGS__)
 199 #define printf(...)             pg_printf(__VA_ARGS__)
 200 #else
 201 #define vsnprintf               pg_vsnprintf
 202 #define snprintf                pg_snprintf
 203 #define sprintf                 pg_sprintf
 204 #define vfprintf                pg_vfprintf
 205 #define fprintf                 pg_fprintf
 206 #define printf                  pg_printf
 207 #endif
 208 #endif   /* USE_REPL_SNPRINTF */
 209
 210 /* Portable prompt handling */
 211 extern char *simple_prompt(const char *prompt, int maxlen, bool echo);
 212
 213 /*
 214  *      WIN32 doesn't allow descriptors returned by pipe() to be used in select(),
 215  *      so for that platform we use socket() instead of pipe().
 216  *      There is some inconsistency here because sometimes we require pg*, like
 217  *      pgpipe, but in other cases we define rename to pgrename just on Win32.
 218  */
 219 #ifndef WIN32
 220 /*
 221  *      The function prototypes are not supplied because every C file
 222  *      includes this file.
 223  */
 224 #define pgpipe(a)                       pipe(a)
 225 #define piperead(a,b,c)         read(a,b,c)
 226 #define pipewrite(a,b,c)        write(a,b,c)
 227 #else
 228 extern int      pgpipe(int handles[2]);
 229 extern int      piperead(int s, char *buf, int len);
 230
 231 #define pipewrite(a,b,c)        send(a,b,c,0)
 232
 233 #define PG_SIGNAL_COUNT 32
 234 #define kill(pid,sig)   pgkill(pid,sig)
 235 extern int      pgkill(int pid, int sig);
 236 #endif
 237
 238 extern int      pclose_check(FILE *stream);
 239
 240 /* Global variable holding time zone information. */
 241 #ifndef __CYGWIN__
 242 #define TIMEZONE_GLOBAL timezone
 243 #define TZNAME_GLOBAL tzname
 244 #else
 245 #define TIMEZONE_GLOBAL _timezone
 246 #define TZNAME_GLOBAL _tzname
 247 #endif
 248
 249 #if defined(WIN32) || defined(__CYGWIN__)
 250 /*
 251  *      Win32 doesn't have reliable rename/unlink during concurrent access.
 252  */
 253 extern int      pgrename(const char *from, const char *to);
 254 extern int      pgunlink(const char *path);
 255
 256 /* Include this first so later includes don't see these defines */
 257 #ifdef WIN32_ONLY_COMPILER
 258 #include <io.h>
 259 #endif
 260
 261 #define rename(from, to)                pgrename(from, to)
 262 #define unlink(path)                    pgunlink(path)
 263 #endif   /* defined(WIN32) || defined(__CYGWIN__) */
 264
 265 /*
 266  *      Win32 also doesn't have symlinks, but we can emulate them with
 267  *      junction points on newer Win32 versions.
 268  *
 269  *      Cygwin has its own symlinks which work on Win95/98/ME where
 270  *      junction points don't, so use those instead.  We have no way of
 271  *      knowing what type of system Cygwin binaries will be run on.
 272  *              Note: Some CYGWIN includes might #define WIN32.
 273  */
 274 #if defined(WIN32) && !defined(__CYGWIN__)
 275 extern int      pgsymlink(const char *oldpath, const char *newpath);
 276
 277 #define symlink(oldpath, newpath)       pgsymlink(oldpath, newpath)
 278 #endif
 279
 280 extern void copydir(char *fromdir, char *todir, bool recurse);
 281
 282 extern bool rmtree(const char *path, bool rmtopdir);
 283
 284 /*
 285  * stat() is not guaranteed to set the st_size field on win32, so we
 286  * redefine it to our own implementation that is.
 287  *
 288  * We must pull in sys/stat.h here so the system header definition
 289  * goes in first, and we redefine that, and not the other way around.
 290  *
 291  * Some frontends don't need the size from stat, so if UNSAFE_STAT_OK
 292  * is defined we don't bother with this.
 293  */
 294 #if defined(WIN32) && !defined(__CYGWIN__) && !defined(UNSAFE_STAT_OK)
 295 #include <sys/stat.h>
 296 extern int      pgwin32_safestat(const char *path, struct stat * buf);
 297
 298 #define stat(a,b) pgwin32_safestat(a,b)
 299 #endif
 300
 301 #if defined(WIN32) && !defined(__CYGWIN__)
 302
 303 /*
 304  * open() and fopen() replacements to allow deletion of open files and
 305  * passing of other special options.
 306  */
 307 #define         O_DIRECT        0x80000000
 308 extern int      pgwin32_open(const char *, int,...);
 309 extern FILE *pgwin32_fopen(const char *, const char *);
 310
 311 #ifndef FRONTEND
 312 #define         open(a,b,c) pgwin32_open(a,b,c)
 313 #define         fopen(a,b) pgwin32_fopen(a,b)
 314 #endif
 315
 316 #define popen(a,b) _popen(a,b)
 317 #define pclose(a) _pclose(a)
 318
 319 /* Missing rand functions */
 320 extern long lrand48(void);
 321 extern void srand48(long seed);
 322
 323 /* New versions of MingW have gettimeofday, old mingw and msvc don't */
 324 #ifndef HAVE_GETTIMEOFDAY
 325 /* Last parameter not used */
 326 extern int      gettimeofday(struct timeval * tp, struct timezone * tzp);
 327 #endif
 328 #else                                                   /* !WIN32 */
 329
 330 /*
 331  *      Win32 requires a special close for sockets and pipes, while on Unix
 332  *      close() does them all.
 333  */
 334 #define closesocket close
 335 #endif   /* WIN32 */
 336
 337 /*
 338  * Default "extern" declarations or macro substitutes for library routines.
 339  * When necessary, these routines are provided by files in src/port/.
 340  */
 341 #ifndef HAVE_CRYPT
 342 extern char *crypt(const char *key, const char *setting);
 343 #endif
 344
 345 /* WIN32 handled in port/win32.h */
 346 #ifndef WIN32
 347 #define pgoff_t off_t
 348 #if defined(bsdi) || defined(netbsd)
 349 extern int      fseeko(FILE *stream, off_t offset, int whence);
 350 extern off_t ftello(FILE *stream);
 351 #endif
 352 #endif
 353
 354 #ifndef HAVE_FSEEKO
 355 #define fseeko(a, b, c) fseek(a, b, c)
 356 #define ftello(a)               ftell(a)
 357 #endif
 358
 359 #ifndef HAVE_GETOPT
 360 extern int      getopt(int nargc, char *const * nargv, const char *ostr);
 361 #endif
 362
 363 #ifndef HAVE_ISINF
 364 extern int      isinf(double x);
 365 #endif
 366
 367 #ifndef HAVE_RINT
 368 extern double rint(double x);
 369 #endif
 370
 371 #ifndef HAVE_INET_ATON
 372 #include <netinet/in.h>
 373 #include <arpa/inet.h>
 374 extern int      inet_aton(const char *cp, struct in_addr * addr);
 375 #endif
 376
 377 #ifndef HAVE_STRDUP
 378 extern char *strdup(const char *str);
 379 #endif
 380
 381 #if !HAVE_DECL_STRLCAT
 382 extern size_t strlcat(char *dst, const char *src, size_t siz);
 383 #endif
 384
 385 #if !HAVE_DECL_STRLCPY
 386 extern size_t strlcpy(char *dst, const char *src, size_t siz);
 387 #endif
 388
 389 #if !defined(HAVE_RANDOM) && !defined(__BORLANDC__)
 390 extern long random(void);
 391 #endif
 392
 393 #ifndef HAVE_UNSETENV
 394 extern void unsetenv(const char *name);
 395 #endif
 396
 397 #ifndef HAVE_SRANDOM
 398 extern void srandom(unsigned int seed);
 399 #endif
 400
 401 /* thread.h */
 402 extern char *pqStrerror(int errnum, char *strerrbuf, size_t buflen);
 403
 404 #if !defined(WIN32) || defined(__CYGWIN__)
 405 extern int pqGetpwuid(uid_t uid, struct passwd * resultbuf, char *buffer,
 406                    size_t buflen, struct passwd ** result);
 407 #endif
 408
 409 extern int pqGethostbyname(const char *name,
 410                                 struct hostent * resultbuf,
 411                                 char *buffer, size_t buflen,
 412                                 struct hostent ** result,
 413                                 int *herrno);
 414
 415 extern void pg_qsort(void *base, size_t nel, size_t elsize,
 416                  int (*cmp) (const void *, const void *));
 417
 418 #define qsort(a,b,c,d) pg_qsort(a,b,c,d)
 419
 420 typedef int (*qsort_arg_comparator) (const void *a, const void *b, void *arg);
 421
 422 extern void qsort_arg(void *base, size_t nel, size_t elsize,
 423                   qsort_arg_comparator cmp, void *arg);
 424
 425 /* port/chklocale.c */
 426 extern int      pg_get_encoding_from_locale(const char *ctype);
 427
 428 #endif   /* PG_PORT_H */