/contrib/cvs/lib/system.h
https://bitbucket.org/freebsd/freebsd-head/ · C++ Header · 570 lines · 345 code · 84 blank · 141 comment · 63 complexity · 356a0accd7d4a2ab40318d2210f5a358 MD5 · raw file
- /* system-dependent definitions for CVS.
- Copyright (C) 1989-1992 Free Software Foundation, Inc.
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details. */
- #include <sys/types.h>
- #include <sys/stat.h>
- #ifdef STAT_MACROS_BROKEN
- #undef S_ISBLK
- #undef S_ISCHR
- #undef S_ISDIR
- #undef S_ISREG
- #undef S_ISFIFO
- #undef S_ISLNK
- #undef S_ISSOCK
- #undef S_ISMPB
- #undef S_ISMPC
- #undef S_ISNWK
- #endif
- /* Not all systems have S_IFMT, but we want to use it if we have it.
- The S_IFMT code below looks right (it masks and compares). The
- non-S_IFMT code looks bogus (are there really systems on which
- S_IFBLK, S_IFLNK, &c, each have their own bit? I suspect it was
- written for OS/2 using the IBM C/C++ Tools 2.01 compiler).
- Of course POSIX systems will have S_IS*, so maybe the issue is
- semi-moot. */
- #if !defined(S_ISBLK) && defined(S_IFBLK)
- # if defined(S_IFMT)
- # define S_ISBLK(m) (((m) & S_IFMT) == S_IFBLK)
- # else
- # define S_ISBLK(m) ((m) & S_IFBLK)
- # endif
- #endif
- #if !defined(S_ISCHR) && defined(S_IFCHR)
- # if defined(S_IFMT)
- # define S_ISCHR(m) (((m) & S_IFMT) == S_IFCHR)
- # else
- # define S_ISCHR(m) ((m) & S_IFCHR)
- # endif
- #endif
- #if !defined(S_ISDIR) && defined(S_IFDIR)
- # if defined(S_IFMT)
- # define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
- # else
- # define S_ISDIR(m) ((m) & S_IFDIR)
- # endif
- #endif
- #if !defined(S_ISREG) && defined(S_IFREG)
- # if defined(S_IFMT)
- # define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
- # else
- # define S_ISREG(m) ((m) & S_IFREG)
- # endif
- #endif
- #if !defined(S_ISFIFO) && defined(S_IFIFO)
- # if defined(S_IFMT)
- # define S_ISFIFO(m) (((m) & S_IFMT) == S_IFIFO)
- # else
- # define S_ISFIFO(m) ((m) & S_IFIFO)
- # endif
- #endif
- #if !defined(S_ISLNK) && defined(S_IFLNK)
- # if defined(S_IFMT)
- # define S_ISLNK(m) (((m) & S_IFMT) == S_IFLNK)
- # else
- # define S_ISLNK(m) ((m) & S_IFLNK)
- # endif
- #endif
- #ifndef S_ISSOCK
- # if defined( S_IFSOCK )
- # ifdef S_IFMT
- # define S_ISSOCK(m) (((m) & S_IFMT) == S_IFSOCK)
- # else
- # define S_ISSOCK(m) ((m) & S_IFSOCK)
- # endif /* S_IFMT */
- # elif defined( S_ISNAM )
- /* SCO OpenServer 5.0.6a */
- # define S_ISSOCK S_ISNAM
- # endif /* !S_IFSOCK && S_ISNAM */
- #endif /* !S_ISSOCK */
- #if !defined(S_ISMPB) && defined(S_IFMPB) /* V7 */
- # if defined(S_IFMT)
- # define S_ISMPB(m) (((m) & S_IFMT) == S_IFMPB)
- # define S_ISMPC(m) (((m) & S_IFMT) == S_IFMPC)
- # else
- # define S_ISMPB(m) ((m) & S_IFMPB)
- # define S_ISMPC(m) ((m) & S_IFMPC)
- # endif
- #endif
- #if !defined(S_ISNWK) && defined(S_IFNWK) /* HP/UX */
- # if defined(S_IFMT)
- # define S_ISNWK(m) (((m) & S_IFMT) == S_IFNWK)
- # else
- # define S_ISNWK(m) ((m) & S_IFNWK)
- # endif
- #endif
- #ifdef NEED_DECOY_PERMISSIONS /* OS/2, really */
- #define S_IRUSR S_IREAD
- #define S_IWUSR S_IWRITE
- #define S_IXUSR S_IEXEC
- #define S_IRWXU (S_IRUSR | S_IWUSR | S_IXUSR)
- #define S_IRGRP S_IREAD
- #define S_IWGRP S_IWRITE
- #define S_IXGRP S_IEXEC
- #define S_IRWXG (S_IRGRP | S_IWGRP | S_IXGRP)
- #define S_IROTH S_IREAD
- #define S_IWOTH S_IWRITE
- #define S_IXOTH S_IEXEC
- #define S_IRWXO (S_IROTH | S_IWOTH | S_IXOTH)
- #else /* ! NEED_DECOY_PERMISSIONS */
- #ifndef S_IRUSR
- #define S_IRUSR 0400
- #define S_IWUSR 0200
- #define S_IXUSR 0100
- /* Read, write, and execute by owner. */
- #define S_IRWXU (S_IRUSR|S_IWUSR|S_IXUSR)
- #define S_IRGRP (S_IRUSR >> 3) /* Read by group. */
- #define S_IWGRP (S_IWUSR >> 3) /* Write by group. */
- #define S_IXGRP (S_IXUSR >> 3) /* Execute by group. */
- /* Read, write, and execute by group. */
- #define S_IRWXG (S_IRWXU >> 3)
- #define S_IROTH (S_IRGRP >> 3) /* Read by others. */
- #define S_IWOTH (S_IWGRP >> 3) /* Write by others. */
- #define S_IXOTH (S_IXGRP >> 3) /* Execute by others. */
- /* Read, write, and execute by others. */
- #define S_IRWXO (S_IRWXG >> 3)
- #endif /* !def S_IRUSR */
- #endif /* NEED_DECOY_PERMISSIONS */
- #if defined(POSIX) || defined(HAVE_UNISTD_H)
- #include <unistd.h>
- #include <limits.h>
- #else
- off_t lseek ();
- char *getcwd ();
- #endif
- #include "xtime.h"
- #ifdef HAVE_IO_H
- #include <io.h>
- #endif
- #ifdef HAVE_DIRECT_H
- #include <direct.h>
- #endif
- /*
- ** MAXPATHLEN and PATH_MAX
- **
- ** On most systems MAXPATHLEN is defined in sys/param.h to be 1024. Of
- ** those that this is not true, again most define PATH_MAX in limits.h
- ** or sys/limits.h which usually gets included by limits.h. On the few
- ** remaining systems that neither statement is true, _POSIX_PATH_MAX
- ** is defined.
- **
- ** So:
- ** 1. If PATH_MAX is defined just use it.
- ** 2. If MAXPATHLEN is defined but not PATH_MAX, then define
- ** PATH_MAX in terms of MAXPATHLEN.
- ** 3. If neither is defined, include limits.h and check for
- ** PATH_MAX again.
- ** 3.1 If we now have PATHSIZE, define PATH_MAX in terms of that.
- ** and ignore the rest. Since _POSIX_PATH_MAX (checked for
- ** next) is the *most* restrictive (smallest) value, if we
- ** trust _POSIX_PATH_MAX, several of our buffers are too small.
- ** 4. If PATH_MAX is still not defined but _POSIX_PATH_MAX is,
- ** then define PATH_MAX in terms of _POSIX_PATH_MAX.
- ** 5. And if even _POSIX_PATH_MAX doesn't exist just put in
- ** a reasonable value.
- ** *. All in all, this is an excellent argument for using pathconf()
- ** when at all possible. Or better yet, dynamically allocate
- ** our buffers and use getcwd() not getwd().
- **
- ** This works on:
- ** Sun Sparc 10 SunOS 4.1.3 & Solaris 1.2
- ** HP 9000/700 HP/UX 8.07 & HP/UX 9.01
- ** Tektronix XD88/10 UTekV 3.2e
- ** IBM RS6000 AIX 3.2
- ** Dec Alpha OSF 1 ????
- ** Intel 386 BSDI BSD/386
- ** Intel 386 SCO OpenServer Release 5
- ** Apollo Domain 10.4
- ** NEC SVR4
- */
- /* On MOST systems this will get you MAXPATHLEN.
- Windows NT doesn't have this file, tho. */
- #ifdef HAVE_SYS_PARAM_H
- #include <sys/param.h>
- #endif
- #ifndef PATH_MAX
- # ifdef MAXPATHLEN
- # define PATH_MAX MAXPATHLEN
- # else
- # include <limits.h>
- # ifndef PATH_MAX
- # ifdef PATHSIZE
- # define PATH_MAX PATHSIZE
- # else /* no PATHSIZE */
- # ifdef _POSIX_PATH_MAX
- # define PATH_MAX _POSIX_PATH_MAX
- # else
- # define PATH_MAX 1024
- # endif /* no _POSIX_PATH_MAX */
- # endif /* no PATHSIZE */
- # endif /* no PATH_MAX */
- # endif /* MAXPATHLEN */
- #endif /* PATH_MAX */
- /* The NeXT (without _POSIX_SOURCE, which we don't want) has a utime.h
- which doesn't define anything. It would be cleaner to have configure
- check for struct utimbuf, but for now I'm checking NeXT here (so I don't
- have to debug the configure check across all the machines). */
- #if defined (HAVE_UTIME_H) && !defined (NeXT)
- # include <utime.h>
- #else
- # if defined (HAVE_SYS_UTIME_H)
- # include <sys/utime.h>
- # else
- # ifndef ALTOS
- struct utimbuf
- {
- long actime;
- long modtime;
- };
- # endif
- int utime ();
- # endif
- #endif
- #include <string.h>
- #ifndef ERRNO_H_MISSING
- #include <errno.h>
- #endif
- /* Not all systems set the same error code on a non-existent-file
- error. This tries to ask the question somewhat portably.
- On systems that don't have ENOTEXIST, this should behave just like
- x == ENOENT. "x" is probably errno, of course. */
- #ifdef ENOTEXIST
- # ifdef EOS2ERR
- # define existence_error(x) \
- (((x) == ENOTEXIST) || ((x) == ENOENT) || ((x) == EOS2ERR))
- # else
- # define existence_error(x) \
- (((x) == ENOTEXIST) || ((x) == ENOENT))
- # endif
- #else
- # ifdef EVMSERR
- # define existence_error(x) \
- ((x) == ENOENT || (x) == EINVAL || (x) == EVMSERR)
- # else
- # define existence_error(x) ((x) == ENOENT)
- # endif
- #endif
- #ifdef STDC_HEADERS
- # include <stdlib.h>
- #else
- char *getenv ();
- char *malloc ();
- char *realloc ();
- char *calloc ();
- extern int errno;
- #endif
- /* SunOS4 apparently does not define this in stdlib.h. */
- #ifndef EXIT_FAILURE
- # define EXIT_FAILURE 1
- #endif
- /* check for POSIX signals */
- #if defined(HAVE_SIGACTION) && defined(HAVE_SIGPROCMASK)
- # define POSIX_SIGNALS
- #endif
- /* MINIX 1.6 doesn't properly support sigaction */
- #if defined(_MINIX)
- # undef POSIX_SIGNALS
- #endif
- /* If !POSIX, try for BSD.. Reason: 4.4BSD implements these as wrappers */
- #if !defined(POSIX_SIGNALS)
- # if defined(HAVE_SIGVEC) && defined(HAVE_SIGSETMASK) && defined(HAVE_SIGBLOCK)
- # define BSD_SIGNALS
- # endif
- #endif
- /* Under OS/2, this must be included _after_ stdio.h; that's why we do
- it here. */
- #ifdef USE_OWN_TCPIP_H
- # include "tcpip.h"
- #endif
- #ifdef HAVE_FCNTL_H
- # include <fcntl.h>
- #else
- # include <sys/file.h>
- #endif
- #ifndef SEEK_SET
- # define SEEK_SET 0
- # define SEEK_CUR 1
- # define SEEK_END 2
- #endif
- #ifndef F_OK
- # define F_OK 0
- # define X_OK 1
- # define W_OK 2
- # define R_OK 4
- #endif
- #if HAVE_DIRENT_H
- # include <dirent.h>
- # define NAMLEN(dirent) strlen((dirent)->d_name)
- #else
- # define dirent direct
- # define NAMLEN(dirent) (dirent)->d_namlen
- # if HAVE_SYS_NDIR_H
- # include <sys/ndir.h>
- # endif
- # if HAVE_SYS_DIR_H
- # include <sys/dir.h>
- # endif
- # if HAVE_NDIR_H
- # include <ndir.h>
- # endif
- #endif
- /* Convert B 512-byte blocks to kilobytes if K is nonzero,
- otherwise return it unchanged. */
- #define convert_blocks(b, k) ((k) ? ((b) + 1) / 2 : (b))
- #ifndef S_ISLNK
- # define lstat stat
- #endif
- /*
- * Some UNIX distributions don't include these in their stat.h Defined here
- * because "config.h" is always included last.
- */
- #ifndef S_IWRITE
- # define S_IWRITE 0000200 /* write permission, owner */
- #endif
- #ifndef S_IWGRP
- # define S_IWGRP 0000020 /* write permission, grougroup */
- #endif
- #ifndef S_IWOTH
- # define S_IWOTH 0000002 /* write permission, other */
- #endif
- /* Under non-UNIX operating systems (MS-DOS, WinNT, MacOS), many filesystem
- calls take only one argument; permission is handled very differently on
- those systems than in Unix. So we leave such systems a hook on which they
- can hang their own definitions. */
- #ifndef CVS_ACCESS
- # define CVS_ACCESS access
- #endif
- #ifndef CVS_CHDIR
- # define CVS_CHDIR chdir
- #endif
- #ifndef CVS_CREAT
- # define CVS_CREAT creat
- #endif
- #ifndef CVS_FOPEN
- # define CVS_FOPEN fopen
- #endif
- #ifndef CVS_FDOPEN
- # define CVS_FDOPEN fdopen
- #endif
- #ifndef CVS_MKDIR
- # define CVS_MKDIR mkdir
- #endif
- #ifndef CVS_OPEN
- # define CVS_OPEN open
- #endif
- #ifndef CVS_READDIR
- # define CVS_READDIR readdir
- #endif
- #ifndef CVS_CLOSEDIR
- # define CVS_CLOSEDIR closedir
- #endif
- #ifndef CVS_OPENDIR
- # define CVS_OPENDIR opendir
- #endif
- #ifndef CVS_RENAME
- # define CVS_RENAME rename
- #endif
- #ifndef CVS_RMDIR
- # define CVS_RMDIR rmdir
- #endif
- #ifndef CVS_STAT
- # define CVS_STAT stat
- #endif
- /* Open question: should CVS_STAT be lstat by default? We need
- to use lstat in order to handle symbolic links correctly with
- the PreservePermissions option. -twp */
- #ifndef CVS_LSTAT
- # define CVS_LSTAT lstat
- #endif
- #ifndef CVS_UNLINK
- # define CVS_UNLINK unlink
- #endif
- /* Wildcard matcher. Should be case-insensitive if the system is. */
- #ifndef CVS_FNMATCH
- # define CVS_FNMATCH fnmatch
- #endif
- #ifdef WIN32
- /*
- * According to GNU conventions, we should avoid referencing any macro
- * containing "WIN" as a reference to Microsoft Windows, as we would like to
- * avoid any implication that we consider Microsoft Windows any sort of "win".
- *
- * FIXME: As of 2003-06-09, folks on the GNULIB project were discussing
- * defining a configure macro to define WOE32 appropriately. If they ever do
- * write such a beast, we should use it, though in most cases it would be
- * preferable to avoid referencing any OS or compiler anyhow, per Autoconf
- * convention, and reference only tested features of the system.
- */
- # define WOE32 1
- #endif /* WIN32 */
- #ifdef WOE32
- /* Under Windows NT, filenames are case-insensitive. */
- # define FILENAMES_CASE_INSENSITIVE 1
- #endif /* WOE32 */
- #ifdef FILENAMES_CASE_INSENSITIVE
- # if defined (__CYGWIN32__) || defined (WOE32)
- /* Under Windows, filenames are case-insensitive, and both / and \
- are path component separators. */
- # define FOLD_FN_CHAR(c) (WNT_filename_classes[(unsigned char) (c)])
- extern unsigned char WNT_filename_classes[];
- /* Is the character C a path name separator? Under
- Windows NT, you can use either / or \. */
- # define ISDIRSEP(c) (FOLD_FN_CHAR(c) == '/')
- # define ISABSOLUTE(s) (ISDIRSEP(s[0]) || FOLD_FN_CHAR(s[0]) >= 'a' && FOLD_FN_CHAR(s[0]) <= 'z' && s[1] == ':' && ISDIRSEP(s[2]))
- # else /* !__CYGWIN32__ && !WOE32 */
- /* As far as I know, only Macintosh OS X & VMS make it here, but any
- * platform defining FILENAMES_CASE_INSENSITIVE which isn't WOE32 or
- * piggy-backing the same could, in theory. Since the OS X fold just folds
- * A-Z into a-z, I'm just allowing it to be used for any case insensitive
- * system which we aren't yet making other specific folds or exceptions for.
- * WOE32 needs its own class since \ and C:\ style absolute paths also need
- * to be accounted for.
- */
- # if defined(USE_VMS_FILENAMES)
- # define FOLD_FN_CHAR(c) (VMS_filename_classes[(unsigned char) (c)])
- extern unsigned char VMS_filename_classes[];
- # else
- # define FOLD_FN_CHAR(c) (OSX_filename_classes[(unsigned char) (c)])
- extern unsigned char OSX_filename_classes[];
- # endif
- # endif /* __CYGWIN32__ || WOE32 */
- /* The following need to be declared for all case insensitive filesystems.
- * When not FOLD_FN_CHAR is not #defined, a default definition for these
- * functions is provided later in this header file. */
- /* Like strcmp, but with the appropriate tweaks for file names. */
- extern int fncmp (const char *n1, const char *n2);
- /* Fold characters in FILENAME to their canonical forms. */
- extern void fnfold (char *FILENAME);
- #endif /* FILENAMES_CASE_INSENSITIVE */
- /* Some file systems are case-insensitive. If FOLD_FN_CHAR is
- #defined, it maps the character C onto its "canonical" form. In a
- case-insensitive system, it would map all alphanumeric characters
- to lower case. Under Windows NT, / and \ are both path component
- separators, so FOLD_FN_CHAR would map them both to /. */
- #ifndef FOLD_FN_CHAR
- # define FOLD_FN_CHAR(c) (c)
- # define fnfold(filename) (filename)
- # define fncmp strcmp
- #endif
- /* Different file systems have different path component separators.
- For the VMS port we might need to abstract further back than this. */
- #ifndef ISDIRSEP
- # define ISDIRSEP(c) ((c) == '/')
- #endif
- /* Different file systems can have different naming patterns which designate
- * a path as absolute
- */
- #ifndef ISABSOLUTE
- # define ISABSOLUTE(s) ISDIRSEP(s[0])
- #endif
- /* On some systems, we have to be careful about writing/reading files
- in text or binary mode (so in text mode the system can handle CRLF
- vs. LF, VMS text file conventions, &c). We decide to just always
- be careful. That way we don't have to worry about whether text and
- binary differ on this system. We just have to worry about whether
- the system has O_BINARY and "rb". The latter is easy; all ANSI C
- libraries have it, SunOS4 has it, and CVS has used it unguarded
- some places for a while now without complaints (e.g. "rb" in
- server.c (server_updated), since CVS 1.8). The former is just an
- #ifdef. */
- #define FOPEN_BINARY_READ ("rb")
- #define FOPEN_BINARY_WRITE ("wb")
- #define FOPEN_BINARY_READWRITE ("r+b")
- #ifdef O_BINARY
- #define OPEN_BINARY (O_BINARY)
- #else
- #define OPEN_BINARY (0)
- #endif