488 lines
10 KiB
C
488 lines
10 KiB
C
/*
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* tclUnixPort.h --
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*
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* This header file handles porting issues that occur because
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* of differences between systems. It reads in UNIX-related
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* header files and sets up UNIX-related macros for Tcl's UNIX
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* core. It should be the only file that contains #ifdefs to
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* handle different flavors of UNIX. This file sets up the
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* union of all UNIX-related things needed by any of the Tcl
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* core files. This file depends on configuration #defines such
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* as NO_DIRENT_H that are set up by the "configure" script.
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*
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* Much of the material in this file was originally contributed
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* by Karl Lehenbauer, Mark Diekhans and Peter da Silva.
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*
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* Copyright (c) 1991-1994 The Regents of the University of California.
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* Copyright (c) 1994-1995 Sun Microsystems, Inc.
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*
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* See the file "license.terms" for information on usage and redistribution
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* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
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*
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* SCCS: @(#) tclUnixPort.h 1.47 97/05/22 10:57:36
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*/
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#ifndef _TCLUNIXPORT
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#define _TCLUNIXPORT
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#ifndef _TCLINT
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# include "tclInt.h"
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#endif
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#include <errno.h>
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#include <fcntl.h>
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#ifdef HAVE_NET_ERRNO_H
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# include <net/errno.h>
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#endif
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#include <pwd.h>
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#include <signal.h>
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#include <sys/param.h>
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#include <sys/types.h>
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#ifdef USE_DIRENT2_H
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# include "../compat/dirent2.h"
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#else
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# ifdef NO_DIRENT_H
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# include "../compat/dirent.h"
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# else
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# include <dirent.h>
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# endif
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#endif
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#include <sys/file.h>
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#ifdef HAVE_SYS_SELECT_H
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# include <sys/select.h>
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#endif
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#include <sys/stat.h>
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#if TIME_WITH_SYS_TIME
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# include <sys/time.h>
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# include <time.h>
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#else
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# if HAVE_SYS_TIME_H
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# include <sys/time.h>
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# else
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# include <time.h>
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# endif
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#endif
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#ifndef NO_SYS_WAIT_H
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# include <sys/wait.h>
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#endif
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#ifdef HAVE_UNISTD_H
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# include <unistd.h>
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#else
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# include "../compat/unistd.h"
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#endif
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#ifdef USE_FIONBIO
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/*
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* Not using the Posix fcntl(...,O_NONBLOCK,...) interface, instead
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* we are using ioctl(..,FIONBIO,..).
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*/
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# ifdef HAVE_SYS_FILIO_H
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# include <sys/filio.h> /* For FIONBIO. */
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# endif
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# ifdef HAVE_SYS_IOCTL_H
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# include <sys/ioctl.h> /* For FIONBIO. */
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# endif
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#endif /* USE_FIONBIO */
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/*
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* Socket support stuff: This likely needs more work to parameterize for
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* each system.
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*/
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#include <sys/socket.h> /* struct sockaddr, SOCK_STREAM, ... */
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#ifndef NO_UNAME
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# include <sys/utsname.h> /* uname system call. */
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#endif
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#include <netinet/in.h> /* struct in_addr, struct sockaddr_in */
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#include <arpa/inet.h> /* inet_ntoa() */
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#include <netdb.h> /* gethostbyname() */
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/*
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* Some platforms (e.g. SunOS) don't define FLT_MAX and FLT_MIN, so we
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* look for an alternative definition. If no other alternative is available
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* we use a reasonable guess.
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*/
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#ifndef NO_FLOAT_H
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#include <float.h>
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#else
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# ifndef NO_VALUES_H
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# include <values.h>
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# endif
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#endif
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#ifndef FLT_MAX
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# ifdef MAXFLOAT
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# define FLT_MAX MAXFLOAT
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# else
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# define FLT_MAX 3.402823466E+38F
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# endif
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#endif
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#ifndef FLT_MIN
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# ifdef MINFLOAT
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# define FLT_MIN MINFLOAT
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# else
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# define FLT_MIN 1.175494351E-38F
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# endif
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#endif
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/*
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* NeXT doesn't define O_NONBLOCK, so #define it here if necessary.
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*/
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#ifndef O_NONBLOCK
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# define O_NONBLOCK 0x80
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#endif
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/*
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* HPUX needs the flag O_NONBLOCK to get the right non-blocking I/O
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* semantics, while most other systems need O_NDELAY. Define the
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* constant NBIO_FLAG to be one of these
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*/
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#ifdef HPUX
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# define NBIO_FLAG O_NONBLOCK
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#else
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# define NBIO_FLAG O_NDELAY
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#endif
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/*
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* The following defines denote malloc and free as the system calls
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* used to allocate new memory. These defines are only used in the
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* file tclCkalloc.c.
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*/
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#define TclpAlloc(size) malloc(size)
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#define TclpFree(ptr) free(ptr)
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#define TclpRealloc(ptr, size) realloc(ptr, size)
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/*
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* The default platform eol translation on Unix is TCL_TRANSLATE_LF:
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*/
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#define TCL_PLATFORM_TRANSLATION TCL_TRANSLATE_LF
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/*
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* Not all systems declare the errno variable in errno.h. so this
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* file does it explicitly. The list of system error messages also
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* isn't generally declared in a header file anywhere.
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*/
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extern int errno;
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/*
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* The type of the status returned by wait varies from UNIX system
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* to UNIX system. The macro below defines it:
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*/
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#ifdef _AIX
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# define WAIT_STATUS_TYPE pid_t
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#else
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#ifndef NO_UNION_WAIT
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# define WAIT_STATUS_TYPE union wait
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#else
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# define WAIT_STATUS_TYPE int
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#endif
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#endif
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/*
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* Supply definitions for macros to query wait status, if not already
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* defined in header files above.
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*/
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#ifndef WIFEXITED
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# define WIFEXITED(stat) (((*((int *) &(stat))) & 0xff) == 0)
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#endif
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#ifndef WEXITSTATUS
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# define WEXITSTATUS(stat) (((*((int *) &(stat))) >> 8) & 0xff)
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#endif
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#ifndef WIFSIGNALED
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# define WIFSIGNALED(stat) (((*((int *) &(stat)))) && ((*((int *) &(stat))) == ((*((int *) &(stat))) & 0x00ff)))
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#endif
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#ifndef WTERMSIG
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# define WTERMSIG(stat) ((*((int *) &(stat))) & 0x7f)
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#endif
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#ifndef WIFSTOPPED
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# define WIFSTOPPED(stat) (((*((int *) &(stat))) & 0xff) == 0177)
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#endif
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#ifndef WSTOPSIG
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# define WSTOPSIG(stat) (((*((int *) &(stat))) >> 8) & 0xff)
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#endif
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/*
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* Define constants for waitpid() system call if they aren't defined
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* by a system header file.
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*/
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#ifndef WNOHANG
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# define WNOHANG 1
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#endif
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#ifndef WUNTRACED
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# define WUNTRACED 2
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#endif
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/*
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* Supply macros for seek offsets, if they're not already provided by
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* an include file.
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*/
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#ifndef SEEK_SET
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# define SEEK_SET 0
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#endif
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#ifndef SEEK_CUR
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# define SEEK_CUR 1
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#endif
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#ifndef SEEK_END
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# define SEEK_END 2
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#endif
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/*
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* The stuff below is needed by the "time" command. If this
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* system has no gettimeofday call, then must use times and the
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* CLK_TCK #define (from sys/param.h) to compute elapsed time.
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* Unfortunately, some systems only have HZ and no CLK_TCK, and
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* some might not even have HZ.
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*/
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#ifdef NO_GETTOD
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# include <sys/times.h>
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# include <sys/param.h>
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# ifndef CLK_TCK
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# ifdef HZ
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# define CLK_TCK HZ
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# else
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# define CLK_TCK 60
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# endif
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# endif
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#else
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# ifdef HAVE_BSDGETTIMEOFDAY
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# define gettimeofday BSDgettimeofday
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# endif
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#endif
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#ifdef GETTOD_NOT_DECLARED
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EXTERN int gettimeofday _ANSI_ARGS_((struct timeval *tp,
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struct timezone *tzp));
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#endif
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/*
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* Define access mode constants if they aren't already defined.
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*/
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#ifndef F_OK
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# define F_OK 00
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#endif
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#ifndef X_OK
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# define X_OK 01
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#endif
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#ifndef W_OK
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# define W_OK 02
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#endif
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#ifndef R_OK
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# define R_OK 04
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#endif
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/*
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* Define FD_CLOEEXEC (the close-on-exec flag bit) if it isn't
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* already defined.
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*/
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#ifndef FD_CLOEXEC
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# define FD_CLOEXEC 1
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#endif
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/*
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* On systems without symbolic links (i.e. S_IFLNK isn't defined)
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* define "lstat" to use "stat" instead.
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*/
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#ifndef S_IFLNK
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# define lstat stat
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#endif
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/*
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* Define macros to query file type bits, if they're not already
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* defined.
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*/
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#ifndef S_ISREG
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# ifdef S_IFREG
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# define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
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# else
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# define S_ISREG(m) 0
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# endif
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# endif
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#ifndef S_ISDIR
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# ifdef S_IFDIR
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# define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
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# else
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# define S_ISDIR(m) 0
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# endif
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# endif
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#ifndef S_ISCHR
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# ifdef S_IFCHR
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# define S_ISCHR(m) (((m) & S_IFMT) == S_IFCHR)
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# else
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# define S_ISCHR(m) 0
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# endif
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# endif
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#ifndef S_ISBLK
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# ifdef S_IFBLK
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# define S_ISBLK(m) (((m) & S_IFMT) == S_IFBLK)
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# else
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# define S_ISBLK(m) 0
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# endif
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# endif
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#ifndef S_ISFIFO
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# ifdef S_IFIFO
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# define S_ISFIFO(m) (((m) & S_IFMT) == S_IFIFO)
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# else
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# define S_ISFIFO(m) 0
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# endif
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# endif
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#ifndef S_ISLNK
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# ifdef S_IFLNK
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# define S_ISLNK(m) (((m) & S_IFMT) == S_IFLNK)
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# else
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# define S_ISLNK(m) 0
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# endif
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# endif
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#ifndef S_ISSOCK
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# ifdef S_IFSOCK
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# define S_ISSOCK(m) (((m) & S_IFMT) == S_IFSOCK)
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# else
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# define S_ISSOCK(m) 0
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# endif
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# endif
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/*
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* Make sure that MAXPATHLEN is defined.
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*/
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#ifndef MAXPATHLEN
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# ifdef PATH_MAX
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# define MAXPATHLEN PATH_MAX
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# else
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# define MAXPATHLEN 2048
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# endif
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#endif
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/*
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* Make sure that L_tmpnam is defined.
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*/
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#ifndef L_tmpnam
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# define L_tmpnam 100
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#endif
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/*
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* The following macro defines the type of the mask arguments to
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* select:
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*/
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#ifndef NO_FD_SET
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# define SELECT_MASK fd_set
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#else
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# ifndef _AIX
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typedef long fd_mask;
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# endif
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# if defined(_IBMR2)
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# define SELECT_MASK void
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# else
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# define SELECT_MASK int
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# endif
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#endif
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/*
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* Define "NBBY" (number of bits per byte) if it's not already defined.
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*/
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#ifndef NBBY
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# define NBBY 8
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#endif
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/*
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* The following macro defines the number of fd_masks in an fd_set:
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*/
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#ifndef FD_SETSIZE
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# ifdef OPEN_MAX
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# define FD_SETSIZE OPEN_MAX
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# else
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# define FD_SETSIZE 256
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# endif
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#endif
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#if !defined(howmany)
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# define howmany(x, y) (((x)+((y)-1))/(y))
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#endif
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#ifndef NFDBITS
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# define NFDBITS NBBY*sizeof(fd_mask)
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#endif
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#define MASK_SIZE howmany(FD_SETSIZE, NFDBITS)
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/*
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* The following function is declared in tclInt.h but doesn't do anything
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* on Unix systems.
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*/
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#define TclSetSystemEnv(a,b)
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/*
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* The following implements the Unix method for exiting the process.
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*/
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#define TclPlatformExit(status) exit(status)
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/*
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* The following functions always succeeds under Unix.
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*/
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#define TclHasSockets(interp) (TCL_OK)
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#define TclHasPipes() (1)
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/*
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* Variables provided by the C library:
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*/
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#if defined(_sgi) || defined(__sgi)
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#define environ _environ
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#endif
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extern char **environ;
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/*
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* At present (12/91) not all stdlib.h implementations declare strtod.
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* The declaration below is here to ensure that it's declared, so that
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* the compiler won't take the default approach of assuming it returns
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* an int. There's no ANSI prototype for it because there would end
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* up being too many conflicts with slightly-different prototypes.
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*/
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extern double strtod();
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/*
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* The following macros define time related functions in terms of
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* standard Unix routines.
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*/
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#define TclpGetDate(t,u) ((u) ? gmtime((t)) : localtime((t)))
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#define TclStrftime(s,m,f,t) (strftime((s),(m),(f),(t)))
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#define TclpGetPid(pid) ((unsigned long) (pid))
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#define TclpReleaseFile(file)
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/*
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* The following routine is only exported for testing purposes.
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*/
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EXTERN int TclUnixWaitForFile _ANSI_ARGS_((int fd, int mask,
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int timeout));
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#endif /* _TCLUNIXPORT */
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