1 /* system-dependent definitions for coreutils
2 Copyright (C) 1989, 1991-2007 Free Software Foundation, Inc.
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2, or (at your option)
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software Foundation,
16 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
20 /* Include sys/types.h before this file. */
22 #if 2 <= __GLIBC__ && 2 <= __GLIBC_MINOR__
23 # if ! defined _SYS_TYPES_H
24 you must include <sys/types.h> before including this file
30 #if !defined HAVE_MKFIFO
31 # define mkfifo(name, mode) mknod (name, (mode) | S_IFIFO, 0)
35 # include <sys/param.h>
41 # define STDIN_FILENO 0
45 # define STDOUT_FILENO 1
49 # define STDERR_FILENO 2
53 /* limits.h must come before pathmax.h because limits.h on some systems
54 undefs PATH_MAX, whereas pathmax.h sets PATH_MAX. */
59 #include "configmake.h"
61 #if TIME_WITH_SYS_TIME
62 # include <sys/time.h>
66 # include <sys/time.h>
72 /* Since major is a function on SVR4, we can't use `ifndef major'. */
74 # include <sys/mkdev.h>
77 #if MAJOR_IN_SYSMACROS
78 # include <sys/sysmacros.h>
81 #ifdef major /* Might be defined in sys/types.h. */
86 # define major(dev) (((dev) >> 8) & 0xff)
87 # define minor(dev) ((dev) & 0xff)
88 # define makedev(maj, min) (((maj) << 8) | (min))
92 #if ! defined makedev && defined mkdev
93 # define makedev(maj, min) mkdev (maj, min)
96 /* Don't use bcopy! Use memmove if source and destination may overlap,
103 /* Some systems don't define the following symbols. */
117 /* Exit statuses for programs like 'env' that exec other programs.
118 EXIT_FAILURE might not be 1, so use EXIT_FAIL in such programs. */
122 EXIT_CANNOT_INVOKE = 126,
126 #include "exitfail.h"
128 /* Set exit_failure to STATUS if that's not the default already. */
130 initialize_exit_failure (int status)
132 if (status != EXIT_FAILURE)
133 exit_failure = status;
146 #ifndef _D_EXACT_NAMLEN
147 # define _D_EXACT_NAMLEN(dp) strlen ((dp)->d_name)
152 NOT_AN_INODE_NUMBER = 0
155 #ifdef D_INO_IN_DIRENT
156 # define D_INO(dp) (dp)->d_ino
158 /* Some systems don't have inodes, so fake them to avoid lots of ifdefs. */
159 # define D_INO(dp) NOT_AN_INODE_NUMBER
162 /* Get or fake the disk device blocksize.
163 Usually defined by sys/param.h (if at all). */
164 #if !defined DEV_BSIZE && defined BSIZE
165 # define DEV_BSIZE BSIZE
167 #if !defined DEV_BSIZE && defined BBSIZE /* SGI */
168 # define DEV_BSIZE BBSIZE
171 # define DEV_BSIZE 4096
174 /* Extract or fake data from a `struct stat'.
175 ST_BLKSIZE: Preferred I/O blocksize for the file, in bytes.
176 ST_NBLOCKS: Number of blocks in the file, including indirect blocks.
177 ST_NBLOCKSIZE: Size of blocks used when calculating ST_NBLOCKS. */
178 #ifndef HAVE_STRUCT_STAT_ST_BLOCKS
179 # define ST_BLKSIZE(statbuf) DEV_BSIZE
180 # if defined _POSIX_SOURCE || !defined BSIZE /* fileblocks.c uses BSIZE. */
181 # define ST_NBLOCKS(statbuf) \
182 ((statbuf).st_size / ST_NBLOCKSIZE + ((statbuf).st_size % ST_NBLOCKSIZE != 0))
183 # else /* !_POSIX_SOURCE && BSIZE */
184 # define ST_NBLOCKS(statbuf) \
185 (S_ISREG ((statbuf).st_mode) \
186 || S_ISDIR ((statbuf).st_mode) \
187 ? st_blocks ((statbuf).st_size) : 0)
188 # endif /* !_POSIX_SOURCE && BSIZE */
189 #else /* HAVE_STRUCT_STAT_ST_BLOCKS */
190 /* Some systems, like Sequents, return st_blksize of 0 on pipes.
191 Also, when running `rsh hpux11-system cat any-file', cat would
192 determine that the output stream had an st_blksize of 2147421096.
193 Conversely st_blksize can be 2 GiB (or maybe even larger) with XFS
194 on 64-bit hosts. Somewhat arbitrarily, limit the `optimal' block
195 size to SIZE_MAX / 8 + 1. (Dividing SIZE_MAX by only 4 wouldn't
196 suffice, since "cat" sometimes multiplies the result by 4.) If
197 anyone knows of a system for which this limit is too small, please
198 report it as a bug in this code. */
199 # define ST_BLKSIZE(statbuf) ((0 < (statbuf).st_blksize \
200 && (statbuf).st_blksize <= SIZE_MAX / 8 + 1) \
201 ? (statbuf).st_blksize : DEV_BSIZE)
202 # if defined hpux || defined __hpux__ || defined __hpux
203 /* HP-UX counts st_blocks in 1024-byte units.
204 This loses when mixing HP-UX and BSD file systems with NFS. */
205 # define ST_NBLOCKSIZE 1024
207 # if defined _AIX && defined _I386
208 /* AIX PS/2 counts st_blocks in 4K units. */
209 # define ST_NBLOCKSIZE (4 * 1024)
210 # else /* not AIX PS/2 */
212 # define ST_NBLOCKS(statbuf) \
213 (S_ISREG ((statbuf).st_mode) \
214 || S_ISDIR ((statbuf).st_mode) \
215 ? (statbuf).st_blocks * ST_BLKSIZE(statbuf)/ST_NBLOCKSIZE : 0)
217 # endif /* not AIX PS/2 */
219 #endif /* HAVE_STRUCT_STAT_ST_BLOCKS */
222 # define ST_NBLOCKS(statbuf) ((statbuf).st_blocks)
225 #ifndef ST_NBLOCKSIZE
227 # define ST_NBLOCKSIZE S_BLKSIZE
229 # define ST_NBLOCKSIZE 512
233 /* Redirection and wildcarding when done by the utility itself.
234 Generally a noop, but used in particular for native VMS. */
235 #ifndef initialize_main
236 # define initialize_main(ac, av)
239 #include "stat-macros.h"
241 #include "timespec.h"
243 #include <inttypes.h>
247 #if ! (defined isblank || HAVE_DECL_ISBLANK)
248 # define isblank(c) ((c) == ' ' || (c) == '\t')
251 /* ISDIGIT differs from isdigit, as follows:
252 - Its arg may be any int or unsigned int; it need not be an unsigned char
254 - It's typically faster.
255 POSIX says that only '0' through '9' are digits. Prefer ISDIGIT to
256 isdigit unless it's important to use the locale's definition
257 of `digit' even when the host does not conform to POSIX. */
258 #define ISDIGIT(c) ((unsigned int) (c) - '0' <= 9)
260 /* Convert a possibly-signed character to an unsigned character. This is
261 a bit safer than casting to unsigned char, since it catches some type
262 errors that the cast doesn't. */
263 static inline unsigned char to_uchar (char ch) { return ch; }
267 /* Take care of NLS matters. */
272 # define textdomain(Domainname) /* empty */
273 # undef bindtextdomain
274 # define bindtextdomain(Domainname, Dirname) /* empty */
277 #define _(msgid) gettext (msgid)
278 #define N_(msgid) msgid
280 /* Return a value that pluralizes the same way that N does, in all
281 languages we know of. */
282 static inline unsigned long int
283 select_plural (uintmax_t n)
285 /* Reduce by a power of ten, but keep it away from zero. The
286 gettext manual says 1000000 should be safe. */
287 enum { PLURAL_REDUCER = 1000000 };
288 return (n <= ULONG_MAX ? n : n % PLURAL_REDUCER + PLURAL_REDUCER);
291 #define STREQ(a, b) (strcmp (a, b) == 0)
297 #if !HAVE_DECL_MALLOC
301 #if !HAVE_DECL_MEMCHR
305 #if !HAVE_DECL_REALLOC
309 #if !HAVE_DECL_GETENV
317 #if !HAVE_DECL_GETLOGIN
321 #if !HAVE_DECL_TTYNAME
325 #if !HAVE_DECL_GETEUID
329 #if !HAVE_DECL_GETPWUID
330 struct passwd *getpwuid ();
333 #if !HAVE_DECL_GETGRGID
334 struct group *getgrgid ();
337 #if !HAVE_DECL_GETUID
344 /* This is simply a shorthand for the common case in which
345 the third argument to x2nrealloc would be `sizeof *(P)'.
346 Ensure that sizeof *(P) is *not* 1. In that case, it'd be
347 better to use X2REALLOC, although not strictly necessary. */
348 #define X2NREALLOC(P, PN) ((void) verify_true (sizeof *(P) != 1), \
349 x2nrealloc (P, PN, sizeof *(P)))
351 /* Using x2realloc (when appropriate) usually makes your code more
352 readable than using x2nrealloc, but it also makes it so your
353 code will malfunction if sizeof *(P) ever becomes 2 or greater.
354 So use this macro instead of using x2realloc directly. */
355 #define X2REALLOC(P, PN) ((void) verify_true (sizeof *(P) == 1), \
358 #include "unlocked-io.h"
359 #include "same-inode.h"
364 dot_or_dotdot (char const *file_name)
366 if (file_name[0] == '.')
368 char sep = file_name[(file_name[1] == '.') + 1];
369 return (! sep || ISSLASH (sep));
375 /* A wrapper for readdir so that callers don't see entries for `.' or `..'. */
376 static inline struct dirent const *
377 readdir_ignoring_dot_and_dotdot (DIR *dirp)
381 struct dirent const *dp = readdir (dirp);
382 if (dp == NULL || ! dot_or_dotdot (dp->d_name))
387 /* Factor out some of the common --help and --version processing code. */
389 /* These enum values cannot possibly conflict with the option values
390 ordinarily used by commands, including CHAR_MAX + 1, etc. Avoid
391 CHAR_MIN - 1, as it may equal -1, the getopt end-of-options value. */
394 GETOPT_HELP_CHAR = (CHAR_MIN - 2),
395 GETOPT_VERSION_CHAR = (CHAR_MIN - 3)
398 #define GETOPT_HELP_OPTION_DECL \
399 "help", no_argument, NULL, GETOPT_HELP_CHAR
400 #define GETOPT_VERSION_OPTION_DECL \
401 "version", no_argument, NULL, GETOPT_VERSION_CHAR
403 #define case_GETOPT_HELP_CHAR \
404 case GETOPT_HELP_CHAR: \
405 usage (EXIT_SUCCESS); \
408 /* Program_name must be a literal string.
409 Usually it is just PROGRAM_NAME. */
410 #define USAGE_BUILTIN_WARNING \
412 "NOTE: your shell may have its own version of %s, which usually supersedes\n" \
413 "the version described here. Please refer to your shell's documentation\n" \
414 "for details about the options it supports.\n")
416 #define HELP_OPTION_DESCRIPTION \
417 _(" --help display this help and exit\n")
418 #define VERSION_OPTION_DESCRIPTION \
419 _(" --version output version information and exit\n")
421 #include "closeout.h"
422 #include "version-etc.h"
424 #define case_GETOPT_VERSION_CHAR(Program_name, Authors) \
425 case GETOPT_VERSION_CHAR: \
426 version_etc (stdout, Program_name, GNU_PACKAGE, VERSION, Authors, \
428 exit (EXIT_SUCCESS); \
432 # define MAX(a, b) ((a) > (b) ? (a) : (b))
436 # define MIN(a,b) (((a) < (b)) ? (a) : (b))
439 #include "intprops.h"
442 # define SSIZE_MAX TYPE_MAXIMUM (ssize_t)
446 # define OFF_T_MIN TYPE_MINIMUM (off_t)
450 # define OFF_T_MAX TYPE_MAXIMUM (off_t)
454 # define UID_T_MAX TYPE_MAXIMUM (uid_t)
458 # define GID_T_MAX TYPE_MAXIMUM (gid_t)
462 # define PID_T_MAX TYPE_MAXIMUM (pid_t)
465 /* Use this to suppress gcc's `...may be used before initialized' warnings. */
467 # define IF_LINT(Code) Code
469 # define IF_LINT(Code) /* empty */
472 #ifndef __attribute__
473 # if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 8) || __STRICT_ANSI__
474 # define __attribute__(x) /* empty */
478 #ifndef ATTRIBUTE_NORETURN
479 # define ATTRIBUTE_NORETURN __attribute__ ((__noreturn__))
482 #ifndef ATTRIBUTE_UNUSED
483 # define ATTRIBUTE_UNUSED __attribute__ ((__unused__))
487 # define ASSIGN_STRDUPA(DEST, S) \
488 do { DEST = strdupa (S); } while (0)
490 # define ASSIGN_STRDUPA(DEST, S) \
493 const char *s_ = (S); \
494 size_t len_ = strlen (s_) + 1; \
495 char *tmp_dest_ = alloca (len_); \
496 DEST = memcpy (tmp_dest_, s_, len_); \
502 # define EOVERFLOW EINVAL
506 # if ! defined fseeko
507 # define fseeko(s, o, w) ((o) == (long int) (o) \
509 : (errno = EOVERFLOW, -1))
511 # if ! defined ftello
512 static inline off_t ftello (FILE *stream)
514 verify (sizeof (long int) <= sizeof (off_t));
515 return ftell (stream);
521 # define sync() /* empty */
524 /* Compute the greatest common divisor of U and V using Euclid's
525 algorithm. U and V must be nonzero. */
528 gcd (size_t u, size_t v)
541 /* Compute the least common multiple of U and V. U and V must be
542 nonzero. There is no overflow checking, so callers should not
543 specify outlandish sizes. */
546 lcm (size_t u, size_t v)
548 return u * (v / gcd (u, v));
551 /* Return PTR, aligned upward to the next multiple of ALIGNMENT.
552 ALIGNMENT must be nonzero. The caller must arrange for ((char *)
553 PTR) through ((char *) PTR + ALIGNMENT - 1) to be addressable
557 ptr_align (void const *ptr, size_t alignment)
559 char const *p0 = ptr;
560 char const *p1 = p0 + alignment - 1;
561 return (void *) (p1 - (size_t) p1 % alignment);
564 /* If 10*Accum + Digit_val is larger than the maximum value for Type,
565 then don't update Accum and return false to indicate it would
566 overflow. Otherwise, set Accum to that new value and return true.
567 Verify at compile-time that Type is Accum's type, and that Type is
568 unsigned. Accum must be an object, so that we can take its
569 address. Accum and Digit_val may be evaluated multiple times.
571 The "Added check" below is not strictly required, but it causes GCC
572 to return a nonzero exit status instead of merely a warning
573 diagnostic, and that is more useful. */
575 #define DECIMAL_DIGIT_ACCUMULATE(Accum, Digit_val, Type) \
577 (void) (&(Accum) == (Type *) NULL), /* The type matches. */ \
578 (void) verify_true (! TYPE_SIGNED (Type)), /* The type is unsigned. */ \
579 (void) verify_true (sizeof (Accum) == sizeof (Type)), /* Added check. */ \
580 (((Type) -1 / 10 < (Accum) \
581 || (Type) ((Accum) * 10 + (Digit_val)) < (Accum)) \
582 ? false : (((Accum) = (Accum) * 10 + (Digit_val)), true)) \