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/*
 * tclUnixPort.h --
 *
 *      This header file handles porting issues that occur because
 *      of differences between systems.  It reads in UNIX-related
 *      header files and sets up UNIX-related macros for Tcl's UNIX
 *      core.  It should be the only file that contains #ifdefs to
 *      handle different flavors of UNIX.  This file sets up the
 *      union of all UNIX-related things needed by any of the Tcl
 *      core files.  This file depends on configuration #defines such
 *      as NO_DIRENT_H that are set up by the "configure" script.
 *
 *      Much of the material in this file was originally contributed
 *      by Karl Lehenbauer, Mark Diekhans and Peter da Silva.
 *
 * Copyright (c) 1991-1994 The Regents of the University of California.
 * Copyright (c) 1994-1995 Sun Microsystems, Inc.
 *
 * See the file "license.terms" for information on usage and redistribution
 * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 *
 * RCS: @(#) $Id: tclUnixPort.h,v 1.1.1.1 2002-01-16 10:25:37 markom Exp $
 */
 
#ifndef _TCLUNIXPORT
#define _TCLUNIXPORT
 
#ifndef _TCLINT
#   include "tclInt.h"
#endif
#include <errno.h>
#include <fcntl.h>
#ifdef HAVE_NET_ERRNO_H
#   include <net/errno.h>
#endif
#include <pwd.h>
#include <signal.h>
#include <sys/param.h>
#include <sys/types.h>
#ifdef USE_DIRENT2_H
#   include "../compat/dirent2.h"
#else
#   ifdef NO_DIRENT_H
#       include "../compat/dirent.h"
#   else
#       include <dirent.h>
#   endif
#endif
#include <sys/file.h>
#ifdef HAVE_SYS_SELECT_H
#   include <sys/select.h>
#endif
#include <sys/stat.h>
#if TIME_WITH_SYS_TIME
#   include <sys/time.h>
#   include <time.h>
#else
#   if HAVE_SYS_TIME_H
#       include <sys/time.h>
#   else
#       include <time.h>
#   endif
#endif
#ifndef NO_SYS_WAIT_H
#   include <sys/wait.h>
#endif
#ifdef HAVE_UNISTD_H
#   include <unistd.h>
#else
#   include "../compat/unistd.h"
#endif
#ifdef  USE_FIONBIO
 
    /*
     * Not using the Posix fcntl(...,O_NONBLOCK,...) interface, instead
     * we are using ioctl(..,FIONBIO,..).
     */
 
#   ifdef HAVE_SYS_FILIO_H
#       include <sys/filio.h>   /* For FIONBIO. */
#   endif
 
#   ifdef HAVE_SYS_IOCTL_H
#       include <sys/ioctl.h>   /* For FIONBIO. */
#   endif
#endif  /* USE_FIONBIO */
 
/*
 * Socket support stuff: This likely needs more work to parameterize for
 * each system.
 */
 
#include <sys/socket.h>         /* struct sockaddr, SOCK_STREAM, ... */
#ifndef NO_UNAME
#   include <sys/utsname.h>     /* uname system call. */
#endif
#include <netinet/in.h>         /* struct in_addr, struct sockaddr_in */
#include <arpa/inet.h>          /* inet_ntoa() */
#include <netdb.h>              /* gethostbyname() */
 
/*
 * Some platforms (e.g. SunOS) don't define FLT_MAX and FLT_MIN, so we
 * look for an alternative definition.  If no other alternative is available
 * we use a reasonable guess.
 */
 
#ifndef NO_FLOAT_H
#include <float.h>
#else
#   ifndef NO_VALUES_H
#       include <values.h>
#   endif
#endif
 
#ifndef FLT_MAX
#   ifdef MAXFLOAT
#       define FLT_MAX MAXFLOAT
#   else
#       define FLT_MAX 3.402823466E+38F
#   endif
#endif
#ifndef FLT_MIN
#   ifdef MINFLOAT
#       define FLT_MIN MINFLOAT
#   else
#       define FLT_MIN 1.175494351E-38F
#   endif
#endif
 
/*
 * NeXT doesn't define O_NONBLOCK, so #define it here if necessary.
 */
 
#ifndef O_NONBLOCK
#   define O_NONBLOCK 0x80
#endif
 
/*
 * HPUX needs the flag O_NONBLOCK to get the right non-blocking I/O
 * semantics, while most other systems need O_NDELAY.  Define the
 * constant NBIO_FLAG to be one of these
 */
 
#ifdef HPUX
#  define NBIO_FLAG O_NONBLOCK
#else
#  define NBIO_FLAG O_NDELAY
#endif
 
/*
 * The following defines denote malloc and free as the system calls
 * used to allocate new memory.  These defines are only used in the
 * file tclCkalloc.c.
 */
 
#define TclpAlloc(size)         malloc(size)
#define TclpFree(ptr)           free(ptr)
#define TclpRealloc(ptr, size)  realloc(ptr, size)
 
/*
 * The default platform eol translation on Unix is TCL_TRANSLATE_LF:
 */
 
#define TCL_PLATFORM_TRANSLATION        TCL_TRANSLATE_LF
 
/*
 * Not all systems declare the errno variable in errno.h. so this
 * file does it explicitly.  The list of system error messages also
 * isn't generally declared in a header file anywhere.
 */
 
extern int errno;
 
/*
 * The type of the status returned by wait varies from UNIX system
 * to UNIX system.  The macro below defines it:
 */
 
#ifdef _AIX
#   define WAIT_STATUS_TYPE pid_t
#else
#ifndef NO_UNION_WAIT
#   define WAIT_STATUS_TYPE union wait
#else
#   define WAIT_STATUS_TYPE int
#endif
#endif
 
/*
 * Supply definitions for macros to query wait status, if not already
 * defined in header files above.
 */
 
#ifndef WIFEXITED
#   define WIFEXITED(stat)  (((*((int *) &(stat))) & 0xff) == 0)
#endif
 
#ifndef WEXITSTATUS
#   define WEXITSTATUS(stat) (((*((int *) &(stat))) >> 8) & 0xff)
#endif
 
#ifndef WIFSIGNALED
#   define WIFSIGNALED(stat) (((*((int *) &(stat)))) && ((*((int *) &(stat))) == ((*((int *) &(stat))) & 0x00ff)))
#endif
 
#ifndef WTERMSIG
#   define WTERMSIG(stat)    ((*((int *) &(stat))) & 0x7f)
#endif
 
#ifndef WIFSTOPPED
#   define WIFSTOPPED(stat)  (((*((int *) &(stat))) & 0xff) == 0177)
#endif
 
#ifndef WSTOPSIG
#   define WSTOPSIG(stat)    (((*((int *) &(stat))) >> 8) & 0xff)
#endif
 
/*
 * Define constants for waitpid() system call if they aren't defined
 * by a system header file.
 */
 
#ifndef WNOHANG
#   define WNOHANG 1
#endif
#ifndef WUNTRACED
#   define WUNTRACED 2
#endif
 
/*
 * Supply macros for seek offsets, if they're not already provided by
 * an include file.
 */
 
#ifndef SEEK_SET
#   define SEEK_SET 0
#endif
 
#ifndef SEEK_CUR
#   define SEEK_CUR 1
#endif
 
#ifndef SEEK_END
#   define SEEK_END 2
#endif
 
/*
 * The stuff below is needed by the "time" command.  If this
 * system has no gettimeofday call, then must use times and the
 * CLK_TCK #define (from sys/param.h) to compute elapsed time.
 * Unfortunately, some systems only have HZ and no CLK_TCK, and
 * some might not even have HZ.
 */
 
#ifdef NO_GETTOD
#   include <sys/times.h>
#   include <sys/param.h>
#   ifndef CLK_TCK
#       ifdef HZ
#           define CLK_TCK HZ
#       else
#           define CLK_TCK 60
#       endif
#   endif
#else
#   ifdef HAVE_BSDGETTIMEOFDAY
#       define gettimeofday BSDgettimeofday
#   endif
#endif
 
#ifdef GETTOD_NOT_DECLARED
EXTERN int              gettimeofday _ANSI_ARGS_((struct timeval *tp,
                            struct timezone *tzp));
#endif
 
/*
 * Define access mode constants if they aren't already defined.
 */
 
#ifndef F_OK
#    define F_OK 00
#endif
#ifndef X_OK
#    define X_OK 01
#endif
#ifndef W_OK
#    define W_OK 02
#endif
#ifndef R_OK
#    define R_OK 04
#endif
 
/*
 * Define FD_CLOEEXEC (the close-on-exec flag bit) if it isn't
 * already defined.
 */
 
#ifndef FD_CLOEXEC
#   define FD_CLOEXEC 1
#endif
 
/*
 * On UNIX, there's no platform specific implementation of "TclpStat(...)"
 * or "TclpAccess(...)".  Simply call "stat(...)' and "access(...)"
 * respectively.
 */
 
#define TclpStat        stat
#define TclpAccess      access
 
/*
 * On systems without symbolic links (i.e. S_IFLNK isn't defined)
 * define "lstat" to use "stat" instead.
 */
 
#ifndef S_IFLNK
#   define lstat stat
#endif
 
/*
 * Define macros to query file type bits, if they're not already
 * defined.
 */
 
#ifndef S_ISREG
#   ifdef S_IFREG
#       define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
#   else
#       define S_ISREG(m) 0
#   endif
# endif
#ifndef S_ISDIR
#   ifdef S_IFDIR
#       define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
#   else
#       define S_ISDIR(m) 0
#   endif
# endif
#ifndef S_ISCHR
#   ifdef S_IFCHR
#       define S_ISCHR(m) (((m) & S_IFMT) == S_IFCHR)
#   else
#       define S_ISCHR(m) 0
#   endif
# endif
#ifndef S_ISBLK
#   ifdef S_IFBLK
#       define S_ISBLK(m) (((m) & S_IFMT) == S_IFBLK)
#   else
#       define S_ISBLK(m) 0
#   endif
# endif
#ifndef S_ISFIFO
#   ifdef S_IFIFO
#       define S_ISFIFO(m) (((m) & S_IFMT) == S_IFIFO)
#   else
#       define S_ISFIFO(m) 0
#   endif
# endif
#ifndef S_ISLNK
#   ifdef S_IFLNK
#       define S_ISLNK(m) (((m) & S_IFMT) == S_IFLNK)
#   else
#       define S_ISLNK(m) 0
#   endif
# endif
#ifndef S_ISSOCK
#   ifdef S_IFSOCK
#       define S_ISSOCK(m) (((m) & S_IFMT) == S_IFSOCK)
#   else
#       define S_ISSOCK(m) 0
#   endif
# endif
 
/*
 * Make sure that MAXPATHLEN is defined.
 */
 
#ifndef MAXPATHLEN
#   ifdef PATH_MAX
#       define MAXPATHLEN PATH_MAX
#   else
#       define MAXPATHLEN 2048
#   endif
#endif
 
/*
 * Make sure that L_tmpnam is defined.
 */
 
#ifndef L_tmpnam
#   define L_tmpnam 100
#endif
 
/*
 * The following macro defines the type of the mask arguments to
 * select:
 */
 
#ifndef NO_FD_SET
#   define SELECT_MASK fd_set
#else
#   ifndef _AIX
        typedef long fd_mask;
#   endif
#   if defined(_IBMR2)
#       define SELECT_MASK void
#   else
#       define SELECT_MASK int
#   endif
#endif
 
/*
 * Define "NBBY" (number of bits per byte) if it's not already defined.
 */
 
#ifndef NBBY
#   define NBBY 8
#endif
 
/*
 * The following macro defines the number of fd_masks in an fd_set:
 */
 
#ifndef FD_SETSIZE
#   ifdef OPEN_MAX
#       define FD_SETSIZE OPEN_MAX
#   else
#       define FD_SETSIZE 256
#   endif
#endif
#if !defined(howmany)
#   define howmany(x, y) (((x)+((y)-1))/(y))
#endif
#ifndef NFDBITS
#   define NFDBITS NBBY*sizeof(fd_mask)
#endif
#define MASK_SIZE howmany(FD_SETSIZE, NFDBITS)
 
/*
 * The following implements the Unix method for exiting the process.
 */
#define TclPlatformExit(status) exit(status)
 
/*
 * The following functions always succeeds under Unix.
 */
 
#define TclHasSockets(interp) (TCL_OK)
 
/*
 * Variables provided by the C library:
 */
 
#if defined(_sgi) || defined(__sgi)
#define environ _environ
#endif
extern char **environ;
 
/*
 * At present (12/91) not all stdlib.h implementations declare strtod.
 * The declaration below is here to ensure that it's declared, so that
 * the compiler won't take the default approach of assuming it returns
 * an int.  There's no ANSI prototype for it because there would end
 * up being too many conflicts with slightly-different prototypes.
 */
 
extern double strtod();
 
/*
 * The following macros define time related functions in terms of
 * standard Unix routines.
 */
 
#define TclpGetDate(t,u) ((u) ? gmtime((t)) : localtime((t)))
#define TclStrftime(s,m,f,t) (strftime((s),(m),(f),(t)))
#define TclpGetPid(pid)     ((unsigned long) (pid))
 
#define TclpReleaseFile(file)   
 
/*
 * TclpFinalize is a noop on Unix systems.
 */
 
#define TclpFinalize()
 
/*
 * The following routine is only exported for testing purposes.
 */
 
EXTERN int      TclUnixWaitForFile _ANSI_ARGS_((int fd, int mask,
                    int timeout));
 
#endif /* _TCLUNIXPORT */

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[/] [or1k/] [tags/] [start/] [insight/] [tcl/] [unix/] [tclUnixPort.h] - Blame information for rev 1765

Line No.	Rev	Author	Line
1	578	markom	`/*`
2			`* tclUnixPort.h --`
3			`*`
4			`* This header file handles porting issues that occur because`
5			`* of differences between systems. It reads in UNIX-related`
6			`* header files and sets up UNIX-related macros for Tcl's UNIX`
7			`* core. It should be the only file that contains #ifdefs to`
8			`* handle different flavors of UNIX. This file sets up the`
9			`* union of all UNIX-related things needed by any of the Tcl`
10			`* core files. This file depends on configuration #defines such`
11			`* as NO_DIRENT_H that are set up by the "configure" script.`
12			`*`
13			`* Much of the material in this file was originally contributed`
14			`* by Karl Lehenbauer, Mark Diekhans and Peter da Silva.`
15			`*`
16			`* Copyright (c) 1991-1994 The Regents of the University of California.`
17			`* Copyright (c) 1994-1995 Sun Microsystems, Inc.`
18			`*`
19			`* See the file "license.terms" for information on usage and redistribution`
20			`* of this file, and for a DISCLAIMER OF ALL WARRANTIES.`
21			`*`
22			`* RCS: @(#) $Id: tclUnixPort.h,v 1.1.1.1 2002-01-16 10:25:37 markom Exp $`
23			`*/`
24
25			`#ifndef _TCLUNIXPORT`
26			`#define _TCLUNIXPORT`
27
28			`#ifndef _TCLINT`
29			`# include "tclInt.h"`
30			`#endif`
31			`#include <errno.h>`
32			`#include <fcntl.h>`
33			`#ifdef HAVE_NET_ERRNO_H`
34			`# include <net/errno.h>`
35			`#endif`
36			`#include <pwd.h>`
37			`#include <signal.h>`
38			`#include <sys/param.h>`
39			`#include <sys/types.h>`
40			`#ifdef USE_DIRENT2_H`
41			`# include "../compat/dirent2.h"`
42			`#else`
43			`# ifdef NO_DIRENT_H`
44			`# include "../compat/dirent.h"`
45			`# else`
46			`# include <dirent.h>`
47			`# endif`
48			`#endif`
49			`#include <sys/file.h>`
50			`#ifdef HAVE_SYS_SELECT_H`
51			`# include <sys/select.h>`
52			`#endif`
53			`#include <sys/stat.h>`
54			`#if TIME_WITH_SYS_TIME`
55			`# include <sys/time.h>`
56			`# include <time.h>`
57			`#else`
58			`# if HAVE_SYS_TIME_H`
59			`# include <sys/time.h>`
60			`# else`
61			`# include <time.h>`
62			`# endif`
63			`#endif`
64			`#ifndef NO_SYS_WAIT_H`
65			`# include <sys/wait.h>`
66			`#endif`
67			`#ifdef HAVE_UNISTD_H`
68			`# include <unistd.h>`
69			`#else`
70			`# include "../compat/unistd.h"`
71			`#endif`
72			`#ifdef USE_FIONBIO`
73
74			`/*`
75			`* Not using the Posix fcntl(...,O_NONBLOCK,...) interface, instead`
76			`* we are using ioctl(..,FIONBIO,..).`
77			`*/`
78
79			`# ifdef HAVE_SYS_FILIO_H`
80			`# include <sys/filio.h> /* For FIONBIO. */`
81			`# endif`
82
83			`# ifdef HAVE_SYS_IOCTL_H`
84			`# include <sys/ioctl.h> /* For FIONBIO. */`
85			`# endif`
86			`#endif /* USE_FIONBIO */`
87
88			`/*`
89			`* Socket support stuff: This likely needs more work to parameterize for`
90			`* each system.`
91			`*/`
92
93			`#include <sys/socket.h> /* struct sockaddr, SOCK_STREAM, ... */`
94			`#ifndef NO_UNAME`
95			`# include <sys/utsname.h> /* uname system call. */`
96			`#endif`
97			`#include <netinet/in.h> /* struct in_addr, struct sockaddr_in */`
98			`#include <arpa/inet.h> /* inet_ntoa() */`
99			`#include <netdb.h> /* gethostbyname() */`
100
101			`/*`
102			`* Some platforms (e.g. SunOS) don't define FLT_MAX and FLT_MIN, so we`
103			`* look for an alternative definition. If no other alternative is available`
104			`* we use a reasonable guess.`
105			`*/`
106
107			`#ifndef NO_FLOAT_H`
108			`#include <float.h>`
109			`#else`
110			`# ifndef NO_VALUES_H`
111			`# include <values.h>`
112			`# endif`
113			`#endif`
114
115			`#ifndef FLT_MAX`
116			`# ifdef MAXFLOAT`
117			`# define FLT_MAX MAXFLOAT`
118			`# else`
119			`# define FLT_MAX 3.402823466E+38F`
120			`# endif`
121			`#endif`
122			`#ifndef FLT_MIN`
123			`# ifdef MINFLOAT`
124			`# define FLT_MIN MINFLOAT`
125			`# else`
126			`# define FLT_MIN 1.175494351E-38F`
127			`# endif`
128			`#endif`
129
130			`/*`
131			`* NeXT doesn't define O_NONBLOCK, so #define it here if necessary.`
132			`*/`
133
134			`#ifndef O_NONBLOCK`
135			`# define O_NONBLOCK 0x80`
136			`#endif`
137
138			`/*`
139			`* HPUX needs the flag O_NONBLOCK to get the right non-blocking I/O`
140			`* semantics, while most other systems need O_NDELAY. Define the`
141			`* constant NBIO_FLAG to be one of these`
142			`*/`
143
144			`#ifdef HPUX`
145			`# define NBIO_FLAG O_NONBLOCK`
146			`#else`
147			`# define NBIO_FLAG O_NDELAY`
148			`#endif`
149
150			`/*`
151			`* The following defines denote malloc and free as the system calls`
152			`* used to allocate new memory. These defines are only used in the`
153			`* file tclCkalloc.c.`
154			`*/`
155
156			`#define TclpAlloc(size) malloc(size)`
157			`#define TclpFree(ptr) free(ptr)`
158			`#define TclpRealloc(ptr, size) realloc(ptr, size)`
159
160			`/*`
161			`* The default platform eol translation on Unix is TCL_TRANSLATE_LF:`
162			`*/`
163
164			`#define TCL_PLATFORM_TRANSLATION TCL_TRANSLATE_LF`
165
166			`/*`
167			`* Not all systems declare the errno variable in errno.h. so this`
168			`* file does it explicitly. The list of system error messages also`
169			`* isn't generally declared in a header file anywhere.`
170			`*/`
171
172			`extern int errno;`
173
174			`/*`
175			`* The type of the status returned by wait varies from UNIX system`
176			`* to UNIX system. The macro below defines it:`
177			`*/`
178
179			`#ifdef _AIX`
180			`# define WAIT_STATUS_TYPE pid_t`
181			`#else`
182			`#ifndef NO_UNION_WAIT`
183			`# define WAIT_STATUS_TYPE union wait`
184			`#else`
185			`# define WAIT_STATUS_TYPE int`
186			`#endif`
187			`#endif`
188
189			`/*`
190			`* Supply definitions for macros to query wait status, if not already`
191			`* defined in header files above.`
192			`*/`
193
194			`#ifndef WIFEXITED`
195			`# define WIFEXITED(stat) (((((int ) &(stat))) & 0xff) == 0)`
196			`#endif`
197
198			`#ifndef WEXITSTATUS`
199			`# define WEXITSTATUS(stat) (((((int ) &(stat))) >> 8) & 0xff)`
200			`#endif`
201
202			`#ifndef WIFSIGNALED`
203			`# define WIFSIGNALED(stat) (((((int ) &(stat)))) && ((((int ) &(stat))) == ((((int ) &(stat))) & 0x00ff)))`
204			`#endif`
205
206			`#ifndef WTERMSIG`
207			`# define WTERMSIG(stat) ((((int ) &(stat))) & 0x7f)`
208			`#endif`
209
210			`#ifndef WIFSTOPPED`
211			`# define WIFSTOPPED(stat) (((((int ) &(stat))) & 0xff) == 0177)`
212			`#endif`
213
214			`#ifndef WSTOPSIG`
215			`# define WSTOPSIG(stat) (((((int ) &(stat))) >> 8) & 0xff)`
216			`#endif`
217
218			`/*`
219			`* Define constants for waitpid() system call if they aren't defined`
220			`* by a system header file.`
221			`*/`
222
223			`#ifndef WNOHANG`
224			`# define WNOHANG 1`
225			`#endif`
226			`#ifndef WUNTRACED`
227			`# define WUNTRACED 2`
228			`#endif`
229
230			`/*`
231			`* Supply macros for seek offsets, if they're not already provided by`
232			`* an include file.`
233			`*/`
234
235			`#ifndef SEEK_SET`
236			`# define SEEK_SET 0`
237			`#endif`
238
239			`#ifndef SEEK_CUR`
240			`# define SEEK_CUR 1`
241			`#endif`
242
243			`#ifndef SEEK_END`
244			`# define SEEK_END 2`
245			`#endif`
246
247			`/*`
248			`* The stuff below is needed by the "time" command. If this`
249			`* system has no gettimeofday call, then must use times and the`
250			`* CLK_TCK #define (from sys/param.h) to compute elapsed time.`
251			`* Unfortunately, some systems only have HZ and no CLK_TCK, and`
252			`* some might not even have HZ.`
253			`*/`
254
255			`#ifdef NO_GETTOD`
256			`# include <sys/times.h>`
257			`# include <sys/param.h>`
258			`# ifndef CLK_TCK`
259			`# ifdef HZ`
260			`# define CLK_TCK HZ`
261			`# else`
262			`# define CLK_TCK 60`
263			`# endif`
264			`# endif`
265			`#else`
266			`# ifdef HAVE_BSDGETTIMEOFDAY`
267			`# define gettimeofday BSDgettimeofday`
268			`# endif`
269			`#endif`
270
271			`#ifdef GETTOD_NOT_DECLARED`
272			`EXTERN int gettimeofday _ANSI_ARGS_((struct timeval *tp,`
273			`struct timezone *tzp));`
274			`#endif`
275
276			`/*`
277			`* Define access mode constants if they aren't already defined.`
278			`*/`
279
280			`#ifndef F_OK`
281			`# define F_OK 00`
282			`#endif`
283			`#ifndef X_OK`
284			`# define X_OK 01`
285			`#endif`
286			`#ifndef W_OK`
287			`# define W_OK 02`
288			`#endif`
289			`#ifndef R_OK`
290			`# define R_OK 04`
291			`#endif`
292
293			`/*`
294			`* Define FD_CLOEEXEC (the close-on-exec flag bit) if it isn't`
295			`* already defined.`
296			`*/`
297
298			`#ifndef FD_CLOEXEC`
299			`# define FD_CLOEXEC 1`
300			`#endif`
301
302			`/*`
303			`* On UNIX, there's no platform specific implementation of "TclpStat(...)"`
304			`* or "TclpAccess(...)". Simply call "stat(...)' and "access(...)"`
305			`* respectively.`
306			`*/`
307
308			`#define TclpStat stat`
309			`#define TclpAccess access`
310
311			`/*`
312			`* On systems without symbolic links (i.e. S_IFLNK isn't defined)`
313			`* define "lstat" to use "stat" instead.`
314			`*/`
315
316			`#ifndef S_IFLNK`
317			`# define lstat stat`
318			`#endif`
319
320			`/*`
321			`* Define macros to query file type bits, if they're not already`
322			`* defined.`
323			`*/`
324
325			`#ifndef S_ISREG`
326			`# ifdef S_IFREG`
327			`# define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)`
328			`# else`
329			`# define S_ISREG(m) 0`
330			`# endif`
331			`# endif`
332			`#ifndef S_ISDIR`
333			`# ifdef S_IFDIR`
334			`# define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)`
335			`# else`
336			`# define S_ISDIR(m) 0`
337			`# endif`
338			`# endif`
339			`#ifndef S_ISCHR`
340			`# ifdef S_IFCHR`
341			`# define S_ISCHR(m) (((m) & S_IFMT) == S_IFCHR)`
342			`# else`
343			`# define S_ISCHR(m) 0`
344			`# endif`
345			`# endif`
346			`#ifndef S_ISBLK`
347			`# ifdef S_IFBLK`
348			`# define S_ISBLK(m) (((m) & S_IFMT) == S_IFBLK)`
349			`# else`
350			`# define S_ISBLK(m) 0`
351			`# endif`
352			`# endif`
353			`#ifndef S_ISFIFO`
354			`# ifdef S_IFIFO`
355			`# define S_ISFIFO(m) (((m) & S_IFMT) == S_IFIFO)`
356			`# else`
357			`# define S_ISFIFO(m) 0`
358			`# endif`
359			`# endif`
360			`#ifndef S_ISLNK`
361			`# ifdef S_IFLNK`
362			`# define S_ISLNK(m) (((m) & S_IFMT) == S_IFLNK)`
363			`# else`
364			`# define S_ISLNK(m) 0`
365			`# endif`
366			`# endif`
367			`#ifndef S_ISSOCK`
368			`# ifdef S_IFSOCK`
369			`# define S_ISSOCK(m) (((m) & S_IFMT) == S_IFSOCK)`
370			`# else`
371			`# define S_ISSOCK(m) 0`
372			`# endif`
373			`# endif`
374
375			`/*`
376			`* Make sure that MAXPATHLEN is defined.`
377			`*/`
378
379			`#ifndef MAXPATHLEN`
380			`# ifdef PATH_MAX`
381			`# define MAXPATHLEN PATH_MAX`
382			`# else`
383			`# define MAXPATHLEN 2048`
384			`# endif`
385			`#endif`
386
387			`/*`
388			`* Make sure that L_tmpnam is defined.`
389			`*/`
390
391			`#ifndef L_tmpnam`
392			`# define L_tmpnam 100`
393			`#endif`
394
395			`/*`
396			`* The following macro defines the type of the mask arguments to`
397			`* select:`
398			`*/`
399
400			`#ifndef NO_FD_SET`
401			`# define SELECT_MASK fd_set`
402			`#else`
403			`# ifndef _AIX`
404			`typedef long fd_mask;`
405			`# endif`
406			`# if defined(_IBMR2)`
407			`# define SELECT_MASK void`
408			`# else`
409			`# define SELECT_MASK int`
410			`# endif`
411			`#endif`
412
413			`/*`
414			`* Define "NBBY" (number of bits per byte) if it's not already defined.`
415			`*/`
416
417			`#ifndef NBBY`
418			`# define NBBY 8`
419			`#endif`
420
421			`/*`
422			`* The following macro defines the number of fd_masks in an fd_set:`
423			`*/`
424
425			`#ifndef FD_SETSIZE`
426			`# ifdef OPEN_MAX`
427			`# define FD_SETSIZE OPEN_MAX`
428			`# else`
429			`# define FD_SETSIZE 256`
430			`# endif`
431			`#endif`
432			`#if !defined(howmany)`
433			`# define howmany(x, y) (((x)+((y)-1))/(y))`
434			`#endif`
435			`#ifndef NFDBITS`
436			`# define NFDBITS NBBY*sizeof(fd_mask)`
437			`#endif`
438			`#define MASK_SIZE howmany(FD_SETSIZE, NFDBITS)`
439
440			`/*`
441			`* The following implements the Unix method for exiting the process.`
442			`*/`
443			`#define TclPlatformExit(status) exit(status)`
444
445			`/*`
446			`* The following functions always succeeds under Unix.`
447			`*/`
448
449			`#define TclHasSockets(interp) (TCL_OK)`
450
451			`/*`
452			`* Variables provided by the C library:`
453			`*/`
454
455			`#if defined(_sgi) \|\| defined(__sgi)`
456			`#define environ _environ`
457			`#endif`
458			`extern char **environ;`
459
460			`/*`
461			`* At present (12/91) not all stdlib.h implementations declare strtod.`
462			`* The declaration below is here to ensure that it's declared, so that`
463			`* the compiler won't take the default approach of assuming it returns`
464			`* an int. There's no ANSI prototype for it because there would end`
465			`* up being too many conflicts with slightly-different prototypes.`
466			`*/`
467
468			`extern double strtod();`
469
470			`/*`
471			`* The following macros define time related functions in terms of`
472			`* standard Unix routines.`
473			`*/`
474
475			`#define TclpGetDate(t,u) ((u) ? gmtime((t)) : localtime((t)))`
476			`#define TclStrftime(s,m,f,t) (strftime((s),(m),(f),(t)))`
477			`#define TclpGetPid(pid) ((unsigned long) (pid))`
478
479			`#define TclpReleaseFile(file)`
480
481			`/*`
482			`* TclpFinalize is a noop on Unix systems.`
483			`*/`
484
485			`#define TclpFinalize()`
486
487			`/*`
488			`* The following routine is only exported for testing purposes.`
489			`*/`
490
491			`EXTERN int TclUnixWaitForFile _ANSI_ARGS_((int fd, int mask,`
492			`int timeout));`
493
494			`#endif /* _TCLUNIXPORT */`