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2011-10-01ls: fix output of dangling symlinks colored as targetPádraig Brady
This is related to commit b7f2b51c, 2010-01-01, "ls: fix color of broken symlinks colored as target" which didn't handle the --dereference case. The simplest way to reproduce the resultant erroneous "argetm" is as follows: $ ln -s /no-such dangle $ env LS_COLORS=ln=target ls --dereference --color ls: cannot access dangle: No such file or directory argetmdangle This is also an issue with the `tree` utility, reported here: http://bugs.debian.org/586765 * src/ls.c (print_color_indicator): Move the handling of 'ln=target' in $LS_COLORS (color_symlink_as_referent == true) to a higher scope, to handle all cases where type == C_LINK. * tests/misc/ls-misc: Add a test case for the specific issue, and 2 further test cases to verify other code paths in this area. Reported by Jason Glassey.
2011-09-30ls: avoid reading beyond end of color indicatorJim Meyering
At first this looked like a buffer overrun, since there was no test to ensure that the buffer length was 6. However, since the LS_COLORS string is NUL-terminated and since settings within it are separated by ":" there was neither the risk of reading beyond end of buffer nor risk of a false-positive match. * src/ls.c (print_color_indicator): Use color_symlink_as_referent rather than manually comparing against "target" again. * src/system.h (STRNCMP_LIT): Correct description in comment.
2011-07-16ls: port to NonStop (Bug#9076)Paul Eggert
* src/ls.c (SA_RESTART): Define to 0 if not defined.
2011-06-25doc: improve ls --help grammarJim Meyering
* src/ls.c (usage): Improve grammar. Reported by Peng Yu.
2011-06-13maint: use stat-size module from gnulibJames Youngman
* gnulib: Update to latest. * src/system.h: Definitions of ST_* macros have moved into the gnulib module stat-size (specifically, the header file stat-size.h), so remove them from here. * src/truncate.c: Include stat-size.h. * src/stat.c: Likewise. * src/shred.c: Likewise. * src/ls.c: Likewise. * src/du.c: Likewise. * src/ioblksize.h: New file. Move definition of io_blksize out of system.h so that system.h does not have to include stat-size.h. * src/cat.c: Include ioblksize.h. * src/split.c: Likewise. * src/copy.c: Include both stat-size.h and ioblksize.h. * src/Makefile.am (noinst_HEADERS): Add ioblksize.h.
2011-06-09maint: remove unneeded includesPádraig Brady
Remove unneeded includes as reported by: http://code.google.com/p/include-what-you-use/ * src/cp-hash.c: Remove unused include. * src/dd.c: Likewise. * src/du.c: Likewise. * src/head.c: Likewise. * src/kill.c: Likewise. * src/ls.c: Likewise. * src/stdbuf.c: Likewise. * src/timeout.c: Likewise. * src/truncate.c: Likewise.
2011-05-28ls: placate gcc-4.7.0's -Wstrict-overflowJim Meyering
* src/ls.c (enum parse_state): Define. (parse_ls_color): Use enum names in place of constants, thus avoiding the offending -1.
2011-05-27maint: fix a -Wstrict-overflow build failure with gcc 4.5Pádraig Brady
* src/ls.c (print_color_indicator): Avoid the warning by not decrementing the integer.
2011-05-17doc: mention that ls time ordering is newest firstPádraig Brady
* src/ls.c (usage): Add the "newest first" info to the -t and -c options
2011-05-13ls: allow stat-free use of --colorJim Meyering
Even on a system with d_type support, the default use of --color makes ls stat every file in order to be able to honor settings like EXEC, STICKY, ORPHAN, SETUID, etc., because those settings require information that is not provided by dirent.d_type. However, if for a potentially large performance gain, you are willing to disable those settings, you can now make ls --color give type-related coloring and perform no stat calls at all (other than the unavoidable call-per- command-line argument). Before this change, even with all of those attributes disabled, ls --color would still stat every directory. Now, we're down to the minimum of one stat call per command-line arg. * src/ls.c (gobble_file): With --color, don't stat a non-command-line-specified directory when no directory-coloring attribute is enabled. * tests/init.cfg (require_dirent_d_type_): New function. * tests/d_type-check: New script, mostly from Pádraig Brady. * tests/Makefile.am (EXTRA_DIST): Add it. * tests/ls/stat-free-color: New test. * tests/Makefile.am (TESTS): Add it. * doc/coreutils.texi (General output formatting): Describe how to use dircolors to make ls --color refrain from calling stat on a d_type-enabled file system. Prompted by a query from Josef Bacik.
2011-05-08maint: remove -Wmissing-field-initializers workaroundsPádraig Brady
* configure.ac: Rather than disabling -Wmissing-field-initializers, use the fact that gnulib now disables it automatically when required (on versions of GCC older than 4.7). * src/system.h: Remove the no longer needed DECLARE_ZEROED_AGGREGATE. * src/ls.c: Likewise. * src/pathchk.c: Likewise. * src/shred.c: Likewise. * src/stty.c: Likewise. * src/wc.c: Likewise.
2011-04-03maint: prohibit direct use of strncmp: prefer STREQ_LEN, STRNCMP_LITJim Meyering
* cfg.mk (sc_prohibit_strncmp): New rule, mostly from libvirt. * src/system.h (STREQ_LEN, STRPREFIX, STRNCMP_LIT): Define. * src/df.c (get_dev, get_point): Convert. * src/extent-scan.c (extent_need_sync): Likewise. * src/ls.c (is_colored, decode_switches): Likewise. (parse_ls_color, (print_color_indicator): Likewise. * src/md5sum.c (split_3): Likewise. * src/split.c (main, emit_ancillary_info): Likewise. * src/tr.c (look_up_char_class): Likewise. * src/uname.c (main): Likewise. * src/who.c (scan_entries): Likewise.
2011-01-01maint: update all copyright year number rangesJim Meyering
Run "make update-copyright".
2010-12-28coreutils: keep lines within 80-column limitsPaul Eggert
* cfg.mk (LINE_LEN_MAX, FILTER_LONG_LINES): New macros. (sc_long_lines): New rule. * HACKING: Use shorter URLs to the same material. * doc/Makefile.am, doc/coreutils.texi, m4/boottime.m4: * man/help2man, man/stdbuf.x, src/Makefile.am, src/cat.c, src/copy.c: * src/cp.c, src/dd.c, src/df.c, src/du.c, src/groups.c, src/install.c: * src/ls.c, src/md5sum.c, src/mv.c, src/od.c, src/pinky.c, src/ptx.c: * src/readlink.c, src/remove.c, src/rmdir.c, src/setuidgid.c: * src/sort.c, src/tail.c, src/touch.c, tests/Coreutils.pm: * tests/cp/existing-perm-race, tests/cp/perm, tests/cp/preserve-gid: * tests/du/2g, tests/du/long-from-unreadable, tests/init.sh: * tests/install/basic-1, tests/ls/nameless-uid: * tests/ls/readdir-mountpoint-inode, tests/misc/chroot-credentials: * tests/misc/cut, tests/misc/date, tests/misc/join, tests/misc/md5sum: * tests/misc/sha1sum, tests/misc/sha224sum, tests/misc/sort: * tests/misc/sort-continue, tests/misc/sort-files0-from: * tests/misc/sort-rand, tests/misc/stdbuf, tests/misc/tr: * tests/misc/uniq, tests/mv/atomic, tests/mv/part-fail: * tests/mv/part-symlink, tests/mv/sticky-to-xpart, tests/pr/pr-tests: * tests/rm/fail-2eperm, tests/rm/interactive-always: Reformat to fit within 80 columns. * doc/Makefile.am (BAD_POSIX_PERL): New macro. * doc/coreutils.texi: Reword slightly, to make menus and index lines shorter. * src/md5sum.c: Redo --help output so that it fits within 79 columns, since that's a bit more portable and all the other --help strings fit in 79 columns.
2010-09-18build: use gnulib's new termios moduleJim Meyering
With it, we can remove the two sole tests of HAVE_TERMIOS_H. * bootstrap.conf (gnulib_modules): Add termios. * src/ls.c: Don't test HAVE_TERMIOS_H. * src/stty.c: Likewise. * m4/jm-macros.m4 (gl_CHECK_ALL_TYPES): Remove configure-time test for termios.h.
2010-07-01ls: use the POSIX date style when the locale does not specify onePádraig Brady
Previously we defaulted to "long-iso" format in locales without specific format translations, like the en_* locales for example. This reverts part of commit 6837183d, 08-11-2005, "ls ... acts like --time-style='posix-long-iso' if the locale settings are messed up" * src/ls.c (decode_switches): Only use the ISO format when specified. * NEWS: Mention the change in behavior. Reported by Daniel Qarras at http://bugzilla.redhat.com/525134
2010-06-29doc: df, du, ls: improve --blocksize description in --helpJim Meyering
* src/du.c (usage): Print better --blocksize description. Prompted by Samuel Thibault in <http://bugs.debian.org/353100>. * src/df.c (usage): Likewise. * src/ls.c (usage): Likewise.
2010-06-10ls: avoid just-introduced buffer overrunJim Meyering
* src/ls.c (gobble_file): Revert part of my preceding change, to avoid clobbering stack.
2010-06-08maint: adjust INT_BUFSIZE_BOUND usage for maintainabilityJim Meyering
* src/tail.c (xlseek): Give INT_BUFSIZE_BOUND a variable name, not a type name. * src/ls.c (gobble_file, format_user_or_group_width): Likewise. * src/head.c (elide_tail_bytes_pipe): Likewise. (elide_tail_lines_seekable, main): Likewise. [This change is not complete -- there are doubtless other uses that can be updated in the same way.]
2010-05-31maint: make spacing around "=" consistent, even in IF_LINTJim Meyering
E.g., - size_t desired_width IF_LINT (= 0); + size_t desired_width IF_LINT ( = 0); Use this command: g grep -l IF_LINT | grep '\.[ch]$' \ | xargs perl -pi -e 's/(IF_LINT \()= /$1 = /'
2010-05-31maint: replace each "for (;;)" with "while (true)"Jim Meyering
Run this command: git ls-files | grep '\.[ch]$' \ | xargs perl -pi -e 's/for \(;;\)/while (true)/g' ...except for randint.c, which does not include stdbool.h. In that case, use "while (1)". * gl/lib/randint.c (randint_genmax): Use "while (1)" for infloops. * src/cat.c (simple_cat, cat): Use "while (true)" for infloops. * gl/lib/randread.c (readsource, readisaac): Likewise. * src/copy.c (copy_reg): Likewise. * src/csplit.c (record_line_starts, process_regexp): Likewise. * src/cut.c (set_fields): Likewise. * src/dd.c (iread, parse_symbols): Likewise. * src/df.c (find_mount_point, main): Likewise. * src/du.c (main): Likewise. * src/expand.c (expand): Likewise. * src/factor.c (factor_using_division, do_stdin): Likewise. * src/fmt.c (get_space): Likewise. * src/ls.c (decode_switches): Likewise. * src/od.c (main): Likewise. * src/pr.c (main, read_line): Likewise. * src/shred.c (dopass, genpattern): Likewise. * src/sort.c (initbuf, fillbuf, getmonth, keycompare): Likewise. * src/split.c (bytes_split, lines_split): Likewise. * src/tac.c (tac_seekable): Likewise. * src/test.c (and, or): Likewise. * src/tr.c (squeeze_filter, main): Likewise. * src/tsort.c (search_item): Likewise. * src/unexpand.c (unexpand): Likewise. * src/uniq.c (main): Likewise. * src/yes.c (main): Likewise.
2010-05-03maint: remove now-redundant definitions provided by signal.hJim Meyering
* src/dd.c (SA_NODEFER, SA_RESETHAND): Remove definitions, now that gnulib guarantees they are defined in <signal.h>. * src/ls.c (SA_RESTART): Likewise.
2010-04-24maint: remove now-unnecessary #if HAVE_header_H tests.Jim Meyering
* .x-sc_prohibit_always_true_header_tests: New file. * Makefile.am (syntax_check_exceptions): Add it. * src/cat.c: Remove #if HAVE_SYS_IOCTL_H test. * src/copy.c: Likewise. * src/ls.c: Likewise. * src/stty.c: Likewise. * src/install.c: Remove #if HAVE_SYS_WAIT_H test. * src/kill.c: Likewise. * src/operand2sig.c: Likewise. * src/timeout.c: Likewise. * src/pathchk.c: Remove #if HAVE_WCHAR_H test. * src/stat.c: Remove #if HAVE_NETINET_IN_H test.
2010-03-18doc: improve ls --help's description of --escape (-b)Eric Blake
* src/ls.c (usage): Be more precise about how --escape (-b) works: say "C-style escapes", not "octal escapes". Reported by Jacky Fong.
2010-02-17ls: fix a regression by honoring NORMAL attributes againMoritz Orbach
Output the NORMAL attribute before non file name text. This attribute will continue into file names that would not otherwise be colored unless FILE is also set. The regression was introduced with commit 483297d5, 28-02-2009, "ls --color no longer outputs unnecessary escape sequences". * src/ls.c (set_normal_color): A new function to output the NORMAL attribute sequence if it's enabled. (print_current_files): Output NORMAL before printing long format info. (print_file_name_and_frills): Output NORMAL before printing file name. (print_color_indicator): Reset the attributes before a file name with attributes so that NORMAL attributes will not combine with them. (print_name_with_quoting): Ensure attributes are reset after printing the file name if NORMAL attributes were output. * tests/ls/color-norm: A new test for NORMAL and FILE combinations. * tests/Makefile.am: Reference the new test. * NEWS: Mention the fix. Reported in https://savannah.gnu.org/bugs/?26512
2010-02-01ls --color: don't emit a final no-op escape sequenceJim Meyering
* src/ls.c (main): With --color, avoid emitting the final color- resetting escape sequence when it would be a no-op. * tests/ls/color-clear-to-eol: Adjust expected output accordingly. * tests/ls/color-dtype-dir: Likewise. * tests/ls/multihardlink: Likewise. * tests/ls/stat-free-symlinks: Likewise. * tests/misc/ls-misc: Likewise. * NEWS (Changes in behavior): Mention it. C de-Avillez rebased and adapted four of the new sl-dangle* tests in tests/misc/ls-misc. Reported by Jim Avera in http://bugs.launchpad.net/ubuntu/+source/coreutils/+bug/494663
2010-01-12ls: reorder includes to work around broken <sys/capability.h>Kamil Dudka
* src/ls.c: Include <sys/capability.h> later, to avoid build failure with a header from libcap-2.16-1 or earlier. See http://bugzilla.redhat.com/483548 for details.
2010-01-01ls: fix color of broken symlinks colored as targetEric Blake
* src/ls.c (print_color_indicator): When using 'LINK target' in dircolors, treat broken symlink as C_ORPHAN. * tests/misc/ls-misc (sl-dangle2, sl-dangle3, sl-dangle4) (sl-dangle5): Test for it, and add more coverage. * NEWS: Document it. * THANKS: Update. Reported by Chris Jones.
2010-01-01maint: update all FSF copyright year lists to include 2010Jim Meyering
Use this command: git ls-files | grep -v COPYING \ | xargs env UPDATE_COPYRIGHT_USE_INTERVALS=1 \ build-aux/update-copyright
2009-12-19doc: enhance and reference info about version comparisonPádraig Brady
* doc/coreutils.texi (sort invocation): Reference the additional info about filevercmp rather than the unused strverscmp. (Details about version sort): Add some examples that are not handled well by fileversmp. * src/ls.c: Change a comment referencing the now unused strverscmp.
2009-11-09ls: fix capability coloringPádraig Brady
Capability checking was incorrectly done on just the base name rather than on the whole path. Consequently there could be both false positives and negatives when coloring files with capabilities. Also capability checking was not done at all in certain cases for non executable files. Note passing absolute rather than relative names to cap_get_file() reduces the has_capability() overhead from around 33% to 30%. I.E. ls --color is now around 3% faster. * src/ls.c (struct fileinfo): Add a has_capability member. (print_color_indicator): Refactor to pass just a fileinfo pointer and a flag to say if we're dealing with a symlink target. (print_name_with_quoting): Likewise. (gobble_file): Set has_capability in the fileinfo struct. Also do a capability check even if executable coloring is disabled. Ditto for SETUID and SETUID coloring. Comment on how expensive has_capability() is. (print_long_format): Adjust to refactored print_name_with_quoting. (quote_name): Likewise. (print_file_name_and_frills): Likewise. * tests/ls/capability: Test the various false positive and negatives. * THANKS: Add reporter (Ivan Labath). * NEWS: Mention the fix.
2009-10-09ls: remove explicit getfilecon work-aroundJim Meyering
* src/ls.c (gobble_file): Remove l?getfilecon work-around, now that the gnulib wrappers handle it for us.
2009-09-30ls: always print "?" for allocated size of a dereferenced dangling symlinkPádraig Brady
Previously for `ls -Ls` (but not `ls -Lsl`), we referenced the st_blocks returned from the previous failed stat() call. This undefined value was seen to be 0 for dangling symlinks at least. * src/ls.c (print_file_name_and_frills, length_of_file_name_and_frills): Don't use st_blocks if the previous stat() failed * tests/ls/dangle: Add a test case * NEWS: Mention the fix, and roll up related items into a single entry.
2009-09-29ls: don't use an undefined struct stat after failed stat/lstatJim Meyering
* src/ls.c (format_inode): Access f->stat only if f->stat_ok is set. * NEWS (Bug fixes): Mention it. Improved-by: Pádraig Brady <P@draigBrady.com>
2009-09-29ls: print "?", not "0" as inode of dereferenced dangling symlinkJim Meyering
ls prints inode numbers two ways: for long (-l) listings, and for short ones, e.g., ls -li and ls -i. The code to print long listings properly printed "?" when the inode was unknown, but the code for handling short listings would print 0 instead. Factor out the formatting code into a new function so ls prints the right string ("?") from both places: * NEWS (Bug fixes): Mention it. * src/ls.c (format_inode): New function. (print_long_format): Use it here. (print_file_name_and_frills): Use it here, too. * tests/ls/dangle: Exercise this fix. Reported by Yang Ren in http://bugzilla.redhat.com/525400
2009-09-29ls: with -LR, exit with status 2 upon detecting a cycleJim Meyering
* src/ls.c (print_dir): Diagnosing the cycle is not enough. Also set exit status to 2. This is what Solaris' /bin/ls does, too. * tests/ls/infloop: Rework test: match both expected stdout and stderr. Require an exit status of 2 in this case. * doc/coreutils.texi (ls invocation): Mention that a loop provokes in an exit status of 2. * NEWS (Bug fixes): Mention it. Reported by Yang Ren in http://bugzilla.redhat.com/525402. * THANKS: Correct ordering of Yang Ren's names.
2009-09-23maint: Use logical rather than bitwise operators on boolsPádraig Brady
This is because bitwise operators are: - confusing and inconsistent in a boolean context - non short circuiting - brittle in C89 where bool can be an int (so > 1)
2009-09-23doc: ls: further improve --help message re --colorJim Meyering
* src/ls.c (usage): Correct grammar, change voice, shorten. Inspired by a report from Bruno Schulenberg.
2009-09-22ls: fix a performance regressionPádraig Brady
* src/ls.c (print_color_indicator): This reinstates commit f3f1ccfd, 21-10-2008, "ls: make it possible to disable file capabilities checking" which was inadvertently reverted with commit 3a169f4c, 14-09-2009, "ls: handle disabling of colors consistently ...".
2009-09-21doc: ls: add an article, "the"Jim Meyering
* src/ls.c (usage): Tweak wording.
2009-09-21ls: handle disabling of colors consistently for all tile typesPádraig Brady
* src/ls.c (print_color_indicator): Use consistent syntax for all file and directory subtypes, and fall back to the color of the base type if there is no enabled color for the subtype. This allows turning off specific colors for o+w dirs for example. * tests/ls/color-dtype-dir: Add a case to test that turning off coloring for o+w directories, falls back to standard dir color. * NEWS: Mention the fix Introduced by commit ac467814, 2005-09-05, "Colorize set-user-ID ... files and sticky ... directories."
2009-09-21doc: ls: make help for --color more concise and accuratePádraig Brady
* src/ls.c (usage): Shorten the --color ancillary info by two lines, while replacing --color=none with --color=never. Mention "always" is the default parameter of the --color option, along with the primary help for that option. Mention the ancillary --color info in the --color primary help.
2009-09-21doc: mention the texinfo documentation in --helpPádraig Brady
* src/system.h: Rename emit_bug_reporting_address() to emit_ancillary_info() and update it to not print the translation project address in en_* locales, and _do_ print it in the 'C' (and other) locales so that it's included in the default man page. Also mention how to invoke the texinfo documentation for each command. Also move the "hard-locale.h" include to the 8 files that now use it. * man/help2man: Strip the newly added texinfo reference from the --help output as a more verbose version is already added by help2man. Suggestion from C de-Avillez
2009-09-10doc: improve various BLOCKSIZE and SIZE helpOndřej Vašík
* doc/coreutils.texi (multiplierSuffixes): Mention that the suffix can be specified without a leading number * src/split.c (usage): Refactor SIZE help to within a function * src/truncate.c (usage): Likewise * src/ls.c (usage): Likewise * src/df.c (usage): Likewise. Also add a function with BLOCKSIZE help * src/du.c (usage): Likewise. * src/system.h: Define 2 functions to emit common help text This was prompted by https://bugzilla.redhat.com/show_bug.cgi?id=511188
2009-09-01ls -i: print consistent inode numbers also for mount pointsJim Meyering
On most unix- and linux-based kernels, ls -i DIR_CONTAINING_MOUNT_POINT would print the wrong inode number for any entry that is a mount point. It would do that by relying on readdir's dirent.d_ino values, while most readdir implementations return the inode number of the underlying, inaccessible directory. Thus, it is not consistent with what you'd get when applying stat to the same entry. This bug led to surprising results like "ls -i" and "ls -i --color" printing different numbers (ls must usually "stat" a file to colorize its name). This change makes it so that on offending systems, ls must stat non-command-line-arguments for which otherwise it would be able to use "for free" dirent.d_ino values. Regardless of this change, ls is already required to stat every command-line argument. Note: versions of GNU ls prior to coreutils-6.0 did not perform the invalid optimization, and hence always printed correct inode numbers. Thus, for the sake of correctness, ls -i is forgoing the readdir optimization, for any kernel (including linux!) with POSIX-nonconforming readdir. Note that currently, only Cygwin has been agile enough to conform. * src/ls.c (RELIABLE_D_INO): Define. (print_dir): Use it. For plenty of discussion, see this long thread: http://thread.gmane.org/gmane.comp.gnu.coreutils.bugs/14020 This bug was introduced by the 2006-02-26 commit, 33eb3efe: "In ls, avoid calling stat for --inode (-i), when possible." * tests/ls/readdir-mountpoint-inode: New test. * tests/Makefile.am (TESTS): Add it. * tests/ls/stat-vs-dirent: Don't suppress failure of this test, now that ls -i is fixed. Though note that it doesn't test well, since it compares only the always-stat'd command-line arguments. * NEWS (Bug fixes): Mention it.
2009-08-25global: convert indentation-TABs to spacesJim Meyering
Transformed via this shell code: t=$'\t' git ls-files \ | grep -vE '(^|/)((GNU)?[Mm]akefile|ChangeLog)|\.(am|mk)$' \ | grep -vE 'tests/pr/|help2man' \ | xargs grep -lE "^ *$t" \ | xargs perl -MText::Tabs -ni -le \ '$m=/^( *\t[ \t]*)(.*)/; print $m ? expand($1) . $2 : $_'
2009-07-27ls -1U dir arg ... now works againKamil Dudka
* src/ls.c (print_dir): Emit "$dir_name:\n" *before* accumulating (and possibly printing) directory entry names. The bug was introduced in coreutils-7.0 via commit 8d974b00, 2008-07-30, "ls -U1 now uses constant memory". Reported by Julian Bradfield. * NEWS (Bug fixes): Mention it.
2009-06-11ls --color: do not colorize files with multiple hard links by defaultKamil Dudka
* src/ls.c: Rename hl->mh, do not colorize files with multiple hard links by default. * src/dircolors.c: Rename HARDLINK -> MULTIHARDLINK, hl -> mh. * src/dircolors.hin: Do not colorize files with multiple hard links by default. * tests/Makefile.am: Rename the test case accordingly. * tests/ls/multihardlink: Additionally test ls' default behavior and factor out some duplication. * NEWS: Mention the change in behavior.
2009-05-17maint: use ARRAY_CARDINALITY moreJim Meyering
* src/sort.c (main): Use ARRAY_CARDINALITY, rather than open-coding it. * src/factor.c (WHEEL_END): Likewise. * src/csplit.c (main): Likewise. * src/od.c: Likewise, * src/ls.c (main): Likewise. (N_ENTRIES): Remove definition. Use ARRAY_CARDINALITY instead. * src/dircolors.c: Likewise. (array_len): Remove definition.
2009-04-07maint: Clarify ambiguous refs to Linux kernels or GNU/Linux systemsPádraig Brady
* README-prereq: s_linux_GNU/Linux_ or s_linux_Linux kernel_ * README-valgrind: ditto * src/chown-core.c: ditto * src/dd.c: ditto * src/df.c: ditto * src/ls.c: ditto * src/mv.c: ditto * src/pwd.c: ditto * src/remove.c: ditto * src/shred.c: ditto * src/stat.c: ditto * src/su.c: ditto * src/system.h: ditto * src/timeout.c: ditto * src/truncate.c: ditto