1 /*-------------------------------------------------------------------------
4 * Header for src/port/ compatibility functions.
6 * Portions Copyright (c) 1996-2018, PostgreSQL Global Development Group
7 * Portions Copyright (c) 1994, Regents of the University of California
11 *-------------------------------------------------------------------------
21 * Windows has enough specialized port stuff that we push most of it off
23 * Note: Some CYGWIN includes might #define WIN32.
25 #if defined(WIN32) && !defined(__CYGWIN__)
26 #include "port/win32_port.h"
29 /* socket has a different definition on WIN32 */
33 #define PGINVALID_SOCKET (-1)
35 typedef SOCKET pgsocket;
37 #define PGINVALID_SOCKET INVALID_SOCKET
41 extern bool pg_set_noblock(pgsocket sock);
42 extern bool pg_set_block(pgsocket sock);
44 /* Portable path handling for Unix/Win32 (in path.c) */
46 extern bool has_drive_prefix(const char *filename);
47 extern char *first_dir_separator(const char *filename);
48 extern char *last_dir_separator(const char *filename);
49 extern char *first_path_var_separator(const char *pathlist);
50 extern void join_path_components(char *ret_path,
51 const char *head, const char *tail);
52 extern void canonicalize_path(char *path);
53 extern void make_native_path(char *path);
54 extern void cleanup_path(char *path);
55 extern bool path_contains_parent_reference(const char *path);
56 extern bool path_is_relative_and_below_cwd(const char *path);
57 extern bool path_is_prefix_of_path(const char *path1, const char *path2);
58 extern char *make_absolute_path(const char *path);
59 extern const char *get_progname(const char *argv0);
60 extern void get_share_path(const char *my_exec_path, char *ret_path);
61 extern void get_etc_path(const char *my_exec_path, char *ret_path);
62 extern void get_include_path(const char *my_exec_path, char *ret_path);
63 extern void get_pkginclude_path(const char *my_exec_path, char *ret_path);
64 extern void get_includeserver_path(const char *my_exec_path, char *ret_path);
65 extern void get_lib_path(const char *my_exec_path, char *ret_path);
66 extern void get_pkglib_path(const char *my_exec_path, char *ret_path);
67 extern void get_locale_path(const char *my_exec_path, char *ret_path);
68 extern void get_doc_path(const char *my_exec_path, char *ret_path);
69 extern void get_html_path(const char *my_exec_path, char *ret_path);
70 extern void get_man_path(const char *my_exec_path, char *ret_path);
71 extern bool get_home_path(char *ret_path);
72 extern void get_parent_directory(char *path);
74 /* common/pgfnames.c */
75 extern char **pgfnames(const char *path);
76 extern void pgfnames_cleanup(char **filenames);
81 * By making this a macro we avoid needing to include path.c in libpq.
84 #define IS_DIR_SEP(ch) ((ch) == '/')
86 #define is_absolute_path(filename) \
88 IS_DIR_SEP((filename)[0]) \
91 #define IS_DIR_SEP(ch) ((ch) == '/' || (ch) == '\\')
93 /* See path_is_relative_and_below_cwd() for how we handle 'E:abc'. */
94 #define is_absolute_path(filename) \
96 IS_DIR_SEP((filename)[0]) || \
97 (isalpha((unsigned char) ((filename)[0])) && (filename)[1] == ':' && \
98 IS_DIR_SEP((filename)[2])) \
102 /* Portable locale initialization (in exec.c) */
103 extern void set_pglocale_pgservice(const char *argv0, const char *app);
105 /* Portable way to find binaries (in exec.c) */
106 extern int find_my_exec(const char *argv0, char *retpath);
107 extern int find_other_exec(const char *argv0, const char *target,
108 const char *versionstr, char *retpath);
110 /* Doesn't belong here, but this is used with find_other_exec(), so... */
111 #define PG_BACKEND_VERSIONSTR "postgres (PostgreSQL) " PG_VERSION "\n"
114 #if defined(WIN32) || defined(__CYGWIN__)
120 #if defined(WIN32) && !defined(__CYGWIN__)
121 #define DEVNULL "nul"
123 #define DEVNULL "/dev/null"
126 /* Portable delay handling */
127 extern void pg_usleep(long microsec);
129 /* Portable SQL-like case-independent comparisons and conversions */
130 extern int pg_strcasecmp(const char *s1, const char *s2);
131 extern int pg_strncasecmp(const char *s1, const char *s2, size_t n);
132 extern unsigned char pg_toupper(unsigned char ch);
133 extern unsigned char pg_tolower(unsigned char ch);
134 extern unsigned char pg_ascii_toupper(unsigned char ch);
135 extern unsigned char pg_ascii_tolower(unsigned char ch);
137 #ifdef USE_REPL_SNPRINTF
140 * Versions of libintl >= 0.13 try to replace printf() and friends with
141 * macros to their own versions that understand the %$ format. We do the
142 * same, so disable their macros, if they exist.
163 extern int pg_vsnprintf(char *str, size_t count, const char *fmt, va_list args);
164 extern int pg_snprintf(char *str, size_t count, const char *fmt,...) pg_attribute_printf(3, 4);
165 extern int pg_sprintf(char *str, const char *fmt,...) pg_attribute_printf(2, 3);
166 extern int pg_vfprintf(FILE *stream, const char *fmt, va_list args);
167 extern int pg_fprintf(FILE *stream, const char *fmt,...) pg_attribute_printf(2, 3);
168 extern int pg_printf(const char *fmt,...) pg_attribute_printf(1, 2);
171 * The GCC-specific code below prevents the pg_attribute_printf above from
172 * being replaced, and this is required because gcc doesn't know anything
176 #define vsnprintf(...) pg_vsnprintf(__VA_ARGS__)
177 #define snprintf(...) pg_snprintf(__VA_ARGS__)
178 #define sprintf(...) pg_sprintf(__VA_ARGS__)
179 #define vfprintf(...) pg_vfprintf(__VA_ARGS__)
180 #define fprintf(...) pg_fprintf(__VA_ARGS__)
181 #define printf(...) pg_printf(__VA_ARGS__)
183 #define vsnprintf pg_vsnprintf
184 #define snprintf pg_snprintf
185 #define sprintf pg_sprintf
186 #define vfprintf pg_vfprintf
187 #define fprintf pg_fprintf
188 #define printf pg_printf
190 #endif /* USE_REPL_SNPRINTF */
192 /* Replace strerror() with our own, somewhat more robust wrapper */
193 extern char *pg_strerror(int errnum);
194 #define strerror pg_strerror
196 /* Likewise for strerror_r(); note we prefer the GNU API for that */
197 extern char *pg_strerror_r(int errnum, char *buf, size_t buflen);
198 #define strerror_r pg_strerror_r
199 #define PG_STRERROR_R_BUFLEN 256 /* Recommended buffer size for strerror_r */
201 /* Portable prompt handling */
202 extern void simple_prompt(const char *prompt, char *destination, size_t destlen,
205 extern int pclose_check(FILE *stream);
207 /* Global variable holding time zone information. */
208 #if defined(WIN32) || defined(__CYGWIN__)
209 #define TIMEZONE_GLOBAL _timezone
210 #define TZNAME_GLOBAL _tzname
212 #define TIMEZONE_GLOBAL timezone
213 #define TZNAME_GLOBAL tzname
216 #if defined(WIN32) || defined(__CYGWIN__)
218 * Win32 doesn't have reliable rename/unlink during concurrent access.
220 extern int pgrename(const char *from, const char *to);
221 extern int pgunlink(const char *path);
223 /* Include this first so later includes don't see these defines */
228 #define rename(from, to) pgrename(from, to)
229 #define unlink(path) pgunlink(path)
230 #endif /* defined(WIN32) || defined(__CYGWIN__) */
233 * Win32 also doesn't have symlinks, but we can emulate them with
234 * junction points on newer Win32 versions.
236 * Cygwin has its own symlinks which work on Win95/98/ME where
237 * junction points don't, so use those instead. We have no way of
238 * knowing what type of system Cygwin binaries will be run on.
239 * Note: Some CYGWIN includes might #define WIN32.
241 #if defined(WIN32) && !defined(__CYGWIN__)
242 extern int pgsymlink(const char *oldpath, const char *newpath);
243 extern int pgreadlink(const char *path, char *buf, size_t size);
244 extern bool pgwin32_is_junction(const char *path);
246 #define symlink(oldpath, newpath) pgsymlink(oldpath, newpath)
247 #define readlink(path, buf, size) pgreadlink(path, buf, size)
250 extern bool rmtree(const char *path, bool rmtopdir);
252 #if defined(WIN32) && !defined(__CYGWIN__)
255 * open() and fopen() replacements to allow deletion of open files and
256 * passing of other special options.
258 #define O_DIRECT 0x80000000
259 extern int pgwin32_open(const char *, int,...);
260 extern FILE *pgwin32_fopen(const char *, const char *);
261 #define open(a,b,c) pgwin32_open(a,b,c)
262 #define fopen(a,b) pgwin32_fopen(a,b)
265 * Mingw-w64 headers #define popen and pclose to _popen and _pclose. We want
266 * to use our popen wrapper, rather than plain _popen, so override that. For
267 * consistency, use our version of pclose, too.
277 * system() and popen() replacements to enclose the command in an extra
280 extern int pgwin32_system(const char *command);
281 extern FILE *pgwin32_popen(const char *command, const char *type);
283 #define system(a) pgwin32_system(a)
284 #define popen(a,b) pgwin32_popen(a,b)
285 #define pclose(a) _pclose(a)
287 /* New versions of MingW have gettimeofday, old mingw and msvc don't */
288 #ifndef HAVE_GETTIMEOFDAY
289 /* Last parameter not used */
290 extern int gettimeofday(struct timeval *tp, struct timezone *tzp);
295 * Win32 requires a special close for sockets and pipes, while on Unix
296 * close() does them all.
298 #define closesocket close
302 * On Windows, setvbuf() does not support _IOLBF mode, and interprets that
303 * as _IOFBF. To add insult to injury, setvbuf(file, NULL, _IOFBF, 0)
304 * crashes outright if "parameter validation" is enabled. Therefore, in
305 * places where we'd like to select line-buffered mode, we fall back to
306 * unbuffered mode instead on Windows. Always use PG_IOLBF not _IOLBF
307 * directly in order to implement this behavior.
310 #define PG_IOLBF _IOLBF
312 #define PG_IOLBF _IONBF
316 * Default "extern" declarations or macro substitutes for library routines.
317 * When necessary, these routines are provided by files in src/port/.
320 extern char *crypt(const char *key, const char *setting);
323 /* WIN32 handled in port/win32_port.h */
325 #define pgoff_t off_t
327 extern int fseeko(FILE *stream, off_t offset, int whence);
328 extern off_t ftello(FILE *stream);
332 extern double pg_erand48(unsigned short xseed[3]);
333 extern long pg_lrand48(void);
334 extern long pg_jrand48(unsigned short xseed[3]);
335 extern void pg_srand48(long seed);
338 extern int fls(int mask);
342 #define fseeko(a, b, c) fseek(a, b, c)
343 #define ftello(a) ftell(a)
346 #if !defined(HAVE_GETPEEREID) && !defined(WIN32)
347 extern int getpeereid(int sock, uid_t *uid, gid_t *gid);
351 extern int isinf(double x);
354 * Glibc doesn't use the builtin for clang due to a *gcc* bug in a version
355 * newer than the gcc compatibility clang claims to have. This would cause a
356 * *lot* of superfluous function calls, therefore revert when using clang. In
357 * C++ there's issues with libc++ (not libstdc++), so disable as well.
359 #if defined(__clang__) && !defined(__cplusplus)
360 /* needs to be separate to not confuse other compilers */
361 #if __has_builtin(__builtin_isinf)
362 /* need to include before, to avoid getting overwritten */
365 #define isinf __builtin_isinf
366 #endif /* __has_builtin(isinf) */
367 #endif /* __clang__ && !__cplusplus */
368 #endif /* !HAVE_ISINF */
371 extern char *mkdtemp(char *path);
375 extern double rint(double x);
378 #ifndef HAVE_INET_ATON
379 #include <netinet/in.h>
380 #include <arpa/inet.h>
381 extern int inet_aton(const char *cp, struct in_addr *addr);
384 #if !HAVE_DECL_STRLCAT
385 extern size_t strlcat(char *dst, const char *src, size_t siz);
388 #if !HAVE_DECL_STRLCPY
389 extern size_t strlcpy(char *dst, const char *src, size_t siz);
392 #if !HAVE_DECL_STRNLEN
393 extern size_t strnlen(const char *str, size_t maxlen);
396 #if !defined(HAVE_RANDOM)
397 extern long random(void);
400 #ifndef HAVE_UNSETENV
401 extern void unsetenv(const char *name);
405 extern void srandom(unsigned int seed);
408 #ifndef HAVE_SSL_GET_CURRENT_COMPRESSION
409 #define SSL_get_current_compression(x) 0
413 extern void *dlopen(const char *file, int mode);
414 extern void *dlsym(void *handle, const char *symbol);
415 extern int dlclose(void *handle);
416 extern char *dlerror(void);
420 * In some older systems, the RTLD_NOW flag isn't defined and the mode
421 * argument to dlopen must always be 1.
423 #if !HAVE_DECL_RTLD_NOW
428 * The RTLD_GLOBAL flag is wanted if available, but it doesn't exist
429 * everywhere. If it doesn't exist, set it to 0 so it has no effect.
431 #if !HAVE_DECL_RTLD_GLOBAL
432 #define RTLD_GLOBAL 0
437 extern int pqGetpwuid(uid_t uid, struct passwd *resultbuf, char *buffer,
438 size_t buflen, struct passwd **result);
441 extern int pqGethostbyname(const char *name,
442 struct hostent *resultbuf,
443 char *buffer, size_t buflen,
444 struct hostent **result,
447 extern void pg_qsort(void *base, size_t nel, size_t elsize,
448 int (*cmp) (const void *, const void *));
449 extern int pg_qsort_strcmp(const void *a, const void *b);
451 #define qsort(a,b,c,d) pg_qsort(a,b,c,d)
453 typedef int (*qsort_arg_comparator) (const void *a, const void *b, void *arg);
455 extern void qsort_arg(void *base, size_t nel, size_t elsize,
456 qsort_arg_comparator cmp, void *arg);
458 /* port/chklocale.c */
459 extern int pg_get_encoding_from_locale(const char *ctype, bool write_message);
461 #if defined(WIN32) && !defined(FRONTEND)
462 extern int pg_codepage_to_encoding(UINT cp);
465 /* port/inet_net_ntop.c */
466 extern char *inet_net_ntop(int af, const void *src, int bits,
467 char *dst, size_t size);
469 /* port/pg_strong_random.c */
470 #ifdef HAVE_STRONG_RANDOM
471 extern bool pg_strong_random(void *buf, size_t len);
474 /* port/pgcheckdir.c */
475 extern int pg_check_dir(const char *dir);
477 /* port/pgmkdirp.c */
478 extern int pg_mkdir_p(char *path, int omode);
480 /* port/pqsignal.c */
481 typedef void (*pqsigfunc) (int signo);
482 extern pqsigfunc pqsignal(int signo, pqsigfunc func);
484 extern pqsigfunc pqsignal_no_restart(int signo, pqsigfunc func);
486 #define pqsignal_no_restart(signo, func) pqsignal(signo, func)
490 extern char *escape_single_quotes_ascii(const char *src);
492 /* port/wait_error.c */
493 extern char *wait_result_to_str(int exit_status);
495 #endif /* PG_PORT_H */