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2009-12-08timeout: fix failure if timeout's parent has ignored SIGCHLDPádraig Brady
* src/timeout.c (main): Reset the SIGCHLD handler to the default as otherwise wait() could return -1 and set errno to ECHILD. This condition was ignored until commit 0b1dcf33, on 31-08-2009, "timeout: defensive handling of all wait() errors" but subsequently timeout would run the command correctly but then fail with an error message. * tests/misc/timeout: In a subshell set the CHLD handler to SIG_IGN to ensure the timeout command resets it to SIG_DFL. * NEWS: Mention the fix.
2009-12-04id: handle systems without getgroups supportEric Blake
If getgroups failed with ENOSYS, mgetgroups would unnecessarily fail, and that provoked id into freeing an uninitialized pointer. Meanwhile, we were not using xalloc_die properly. Both issues are better solved in gnulib, by introducing xgetgroups; this patch uses the new interface. Regression introduced by commit 6a31fd8d7. * gnulib: Update, for mgetgroups improvments. * src/id.c (print_full_info): Adjust caller to die on allocation failure, and no longer worry about ENOSYS. * src/group-list.c (print_group_list): Likewise. * src/setuidgid.c (main): Likewise. * NEWS: Mention the fix. * THANKS: Update. Reported by Scott Harrison.
2009-12-01sort: fix link failure on SolarisEric Blake
Commit f9d0bb8481 made sort depend on xnanosleep. * src/Makefile.am (sort_LDADD): Add LIB_NANOSLEEP.
2009-11-28maint: chown.c: remove a commentJim Meyering
* src/chown.c: Remove old spec-like comment.
2009-11-24build: fix link failure on cygwinEric Blake
Cygwin 1.5 has a broken sleep, and the gnulib tests dragged in rpl_sleep which then caused a link failure because it wasn't in libcoreutils.a. We could solve it by using the gnulib sleep module. However, sleep and usleep may interact poorly with SIGALRM, and they have less granularity; so it is better to adopt a policy that if we must sleep, prefer xnanosleep. * src/sort.c (pipe_fork): Use xnanosleep, to avoid the need for rpl_sleep on cygwin, and to reduce granularity. (MAX_FORK_TRIES_COMPRESS, MAX_FORK_TRIES_DECOMPRESS): Increase, to account for reduction in granularity. * src/tail.c (tail_file): Use xnanosleep in debug code. * cfg.mk (sc_prohibit_sleep): New rule.
2009-11-16true, false: perform initialization only when argc == 2Jim Meyering
* src/true.c (main): There is no reason to examine argv[0], call atexit, etc., in the usual case in which we're about to exit. This has the side effect of making it so that these programs no longer segfault when subjected to execve abuse. Before this change, these commands would make "true" segfault: printf '%s\n' '#include <unistd.h>' 'int main(int c, char**v)' \ '{ execve (v[1], 0, 0); }' > k.c && gcc k.c && ./a.out $PWD/true Now it succeeds. Reported by Tetsuo Handa and Bart Van Assche via Ondřej Vašík in http://bugzilla.redhat.com/537684.
2009-11-16tail -F can fail to track a file after it's been rotatedJim Meyering
Tailing forever and by-name (--follow=name, -F), tail would sometimes fail to follow a file that had been removed via rename. If you can't apply this patch and have tail 7.6 or newer, you can work around the bug via the undocumented --disable-inotify option. * src/tail.c (tail_forever_inotify): When tailing by name (-F), do not un-watch a file upon receipt of the IN_MOVE_SELF event. Reported by Arjan Opmeer in http://bugs.debian.org/548439. * NEWS (Bug fixes): Mention it. Also see http://marc.info/?l=coreutils-bug&m=125829031916515 * tests/Makefile.am (TESTS): Add tail-2/inotify-rotate. * tests/tail-2/inotify-rotate: New test.
2009-11-13build: update gnulib, for getgroups improvementsEric Blake
A replacement getgroups is now guaranteed to exist, but it may fail with ENOSYS. mgetgroups is moved to gnulib, and now takes gid_t instead of GETGROUPS_T (but setgroups still needs GETGROUPS_T). * gnulib: Update to latest. * gl/modules/mgetgroups: Delete, moved to gnulib. * gl/m4/mgetgroups.m4: Likewise. * gl/lib/mgetgroups.h: Likewise. * gl/lib/mgetgroups.c: Likewise. * src/group-list.c (print_group_list): Adjust callers. * src/id.c (print_full_info): Likewise.
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.
2009-11-07build: consistently use freopen-saferEric Blake
cat, head, ptx, shuf, tac, tail, tee, tr, and uniq used freopen on stdout, and were potentially vulnerable. dircolors, du, and tsort only used it on stdin, which is unaffected by freopen_safer, but this covers all uses for consistency. * cfg.mk (sc_require_stdio_safer): New rule. * gl/modules/xfreopen (Depends-on): Add freopen-safer. * gl/lib/xfreopen.c (includes): Use stdio--.h. * src/ptx.c (includes): Likewise. * src/shuf.c (includes): Likewise. * src/uniq.c (includes): Likewise. * src/dircolors.c (includes): Likewise. * src/du.c (includes): Likewise. * src/tsort.c (includes): Likewise.
2009-11-07mktemp: fix bug with -q and closed stdoutEric Blake
If stdin or stdout is closed, then freopen(,stderr) can violate the premise that STDERR_FILENO==fileno(stderr), which in turn breaks mktemp -q. * bootstrap.conf (gnulib_modules): Add freopen-safer. * src/mktemp.c (includes): Use stdio--.h. * tests/misc/close-stdout: Enhance test to catch bug.
2009-11-07maint: make du's cycle-detection code consistentJim Meyering
* src/du.c (process_file): Revert the du.c-changing part of commit 8ba5d1a7. Use cycle_warning_required instead.
2009-11-07chcon, chgrp, chmod and chown now diagnose a directory cycleJim Meyering
* lib/xfts.c (cycle_warning_required): New function. * lib/xfts.h: Declare it. * src/chown-core.c (change_file_owner): Diagnose a cycle. * src/chmod.c (process_file): Likewise. * src/chcon.c (process_file): Likewise. * NEWS (Bug fixes): Mention this.
2009-11-06nproc: A new program to count the available processorsGiuseppe Scrivano
* AUTHORS: Add my name. * NEWS: Mention it. * README: Likewise. * bootstrap.conf (gnulib_modules): Add nproc. * doc/coreutils.texi (nproc invocation): Add nproc info. * man/Makefile.am (nproc.1): Add dependency. * man/nproc.x: New template. * man/.gitignore: Ignore generated man page. * po/POTFILES.in: Add src/nproc.c. * src/.gitignore: Exclude nproc. * src/Makefile.am (EXTRA_PROGRAMS): Add nproc. * src/nproc.c: New file. * tests/Makefile.am (TESTS): Add misc/nproc-{avail,positive}. * tests/misc/nproc-avail: New file. * tests/misc/nproc-positive: New file.
2009-11-05mktemp: use more robust means to avoid double-close of stdoutEric Blake
Reverts earlier patch - fflush() can succeed but fclose() fail for some cases of write failures, and we want to catch those. * src/mktemp.c (stdout_closed): New variable. (maybe_close_stdout): New function, borrowed from dd.c. (main): Track whether stdout has been closed.
2009-11-05mktemp: don't try to close stdout twiceJim Meyering
* src/mktemp.c (main): Rather than calling close_stream (which would make atexit-called close_stdout try to close it a second time), check for write failure via ferror and fflush.
2009-11-05mktemp: don't use suff_len in place of #-of-`X's variableJim Meyering
* src/mktemp.c (mkstemp_len, mkdtemp_len): Pass x_len as final argument, and not suff_len.
2009-11-05mktemp: add suffix handlingEric Blake
Now that mkstemps is supported, we might as well use it. * src/mktemp.c (TMPDIR_OPTION): New enum value. (longopts): Add new option. (usage): Document it. (count_trailing_X_s): Rename... (count_consecutive_X_s): ...to this, and add parameter. (mkstemp_len, mkdtemp_len): Add parameter. (main): Implement new option. (AUTHORS): Add myself. * AUTHORS (mktemp): Likewise. * tests/misc/mktemp: Test new option. * doc/coreutils.texi (mktemp invocation): Document it. * NEWS: Likewise. Fixes http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=548316.
2009-11-05build: reflect gnulib changes to tempnameEric Blake
In glibc 2.11 and gnulib, gen_tempname added a parameter suffixlen (unfortunately, it is typed as int rather than size_t, for historical compatibility to a poor choice by BSD). * gnulib: Import latest changes. * gl/lib/tempname.h.diff: Accommodate new suffixlen parameter. * gl/lib/tempname.c.diff (check_x_suffix): Allow for X in suffix beyond x_suffix_len. (gen_tempname_len): Add suffixlen parameter. (__gen_tempname): Update caller. * src/mktemp.c (mkstemp_len, mkdtemp_len): Update callers.
2009-11-05mktemp: rearrange --help outputEric Blake
* src/mktemp.c (usage): Align indentation and sort by long options. Describe valid templates. Suggested by http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=548316.
2009-11-05mktemp: don't leave file behind on write failureEric Blake
* src/mktemp.c (main): Remove just-created file if stdout had problems. * bootstrap.conf (gnulib_modules): Add remove. * tests/misc/close-stdout: Test it. * NEWS: Document it.
2009-11-05du: cleanup: remove dead-code vestige of already-removed optionJim Meyering
* src/du.c (MEGABYTES_LONG_OPTION, main): Remove vestiges of already-removed long option, --megabytes.
2009-11-05du now diagnoses cycles, rather than ignoring themJim Meyering
* src/du.c (symlink_deref_bits): New global, decl moved from ... (main): ...here. (process_file): When fts detects a directory cycle that can't be due to symlinks, report it and arrange to exit nonzero. * NEWS (Bug fixes): Mention it.
2009-11-05maint: factor out cycle warning, now that du will use it, tooJim Meyering
* src/system.h (emit_cycle_warning): Define. Factored out of... * src/remove.c (rm_fts): ...here. Use the new macro.
2009-11-03rm -f: ignore EROFS when it's really ENOENTJim Meyering
rm -f must not print a diagnostic for a nonexistent file. However, most linux-based kernel unlinkat functions set errno to EROFS when the named file (regardless of whether it exists) would lie on a read-only file system. remove.c now performs an extra fstatat call in that case, to determine whether the file exists. * src/remove.c (excise): Map EROFS to ENOENT, if a file is nonexistent. Reported by Steven Drake in <http://savannah.gnu.org/bugs/?27923>. * NEWS (Changes in behavior): Mention it.
2009-10-29maint: avoid exiting with magic numberEric Blake
Cope with gnulib's new sc_prohibit_magic_number_exit rule. * .x-sc_prohibit_magic_number_exit: New file, to add exemptions. * Makefile.am (syntax_check_exceptions): Distribute it. * lib/euidaccess-stat.c (main): Fix culprits. * src/chcon.c (main): Likewise. * src/runcon.c (main): Likewise. * src/setuidgid.c (main): Likewise.
2009-10-28nice, nohup, su: detect write failure to stderrEric Blake
These programs can print non-fatal diagnostics to stderr prior to exec'ing a subsidiary program. However, if we thought the situation warranted a diagnostic, we insist that the diagnostic be printed without error, rather than blindly exec, as it may be a security risk. For an example, try 'nice -n -1 nice 2>/dev/full'. Failure to raise priority (by lowering niceness) is not fatal, but failure to inform the user about failure to change priority is dangerous. * src/nice.c (main): Declare failure if writing advisory message to stderr fails. * src/nohup.c (main): Likewise. * src/su.c (main): Likewise. * tests/misc/nice: Test this. * tests/misc/nohup: Likewise. * NEWS: Document this.
2009-10-28doc: improve the echo and printf help on escapesPádraig Brady
* src/printf.c (usage): Merge strings with echo.c to aid translators. Move the description for \NNN beside the other numeric escape codes. Don't mention "character" as that suggests character conversion. * src/echo.c (usage): Likewise. Also mention the \xHH escape sequence.
2009-10-28echo, printf: interpret \e as the Escape characterPádraig Brady
Match gcc, perl, bash, ksh, tcsh, ... in supporting \e. * src/printf.c (print_escape_char): Output \x1B when \e encountered. * src/echo.c (main): Likewise. * src/stat.c (print_escape_char): Likewise. * doc/coreutils.texi (echo invocation): Add \e to the list. * tests/misc/printf: Verify that \e outputs \x1B. * NEWS: Mention the change in behaviour.
2009-10-28printenv: ignore bogus variable namesEric Blake
Exposed by env a=b=c printenv a=b. * src/printenv.c (main): Silently reject = in names. * tests/misc/printenv: Test for it. * NEWS: Document this.
2009-10-28maint: avoid "make syntax-check" failurePádraig Brady
* src/printenv.c: Remove unused "long-options.h"
2009-10-27doc: turn env comments into documentationEric Blake
* src/env.c: Convert introductory comments... * doc/coreutils.texi (env invocation): ...into documentation. Suggested by Jim Meyering.
2009-10-27env, printenv: add -0/--null optionEric Blake
Allows for unambiguous processing when environment values (or even non-portable names!) contain newline. * src/env.c (longopts): Add new option. (usage): Document it. (main): Implement it. * src/printenv.c (longopts): New variable. (usage): Document new option. (main): Implement it. * doc/coreutils.texi (Common options): New macro optNull. (du invocation, env invocation, printenv invocation): Use it. * NEWS: Mention this. * tests/misc/env-null: New test. * tests/Makefile.am (TESTS): Run it.
2009-10-26tests: clean up tests of env -- handlingEric Blake
The comment in env.c about -- handling has not matched the behavior in the code since the initial commit back in 1992. * src/env.c: Fix bogus comment. * tests/misc/env: Further tweaks, avoiding PATH problems inherent in testing -i, and testing program name containing =. * doc/coreutils.texi (env invocation): Mention that intermediate program is needed to invoke program with name containing =.
2009-10-26env: reject bogus -u argumentsEric Blake
* src/env.c (main): Use unsetenv rather than putenv to remove items from environ, and check for failure. * bootstrap.conf (gnulib_modules): Add unsetenv. * tests/misc/env: Test this. * NEWS: Document it.
2009-10-26maint: let gnulib provide environEric Blake
* bootstrap.conf (gnulib_modules): Add environ. * src/env.c (environ): Delete declaration. * src/printenv.c (environ): Likewise. * src/stdbuf.c (environ): Likewise. * src/su.c (environ): Likewise.
2009-10-26nice: execute program even when setpriority fails due to EACCESJim Meyering
* src/nice.c (perm_related_errno): New function. (main): Use it, rather than testing only errno == EPERM. * NEWS (Bug fixes): Mention it.
2009-10-25timeout: don't orphan monitored programs if they ignore specified signalsPádraig Brady
* src/timeout.c (install_signal_handlers): Handle any user specified signal, so that if it does not cause the child to exit then we don't exit and orphan the child. Previously this for example, would leave an orphan dd process running: timeout -sUSR1 1s dd if=/dev/zero of=/dev/null * NEWS: Mention the fix.
2009-10-23nohup: use EXIT_CANCELED if not POSIXLY_CORRECTEric Blake
* src/nohup.c (NOHUP_FAILURE): Rename... (POSIX_NOHUP_FAILURE): ...to this. (main): Pay attention to POSIXLY_CORRECT, to determine whether to use status 125 or 127. * doc/coreutils.texi (nohup invocation): Document this. * NEWS: Likewise. * tests/misc/invalid-opt (exit_status): Adjust expected results. * tests/misc/help-version (expected_failure_status): Likewise. * tests/misc/nohup: Likewise.
2009-10-23chroot, env, nice, su: use EXIT_CANCELED for internal failureEric Blake
* src/chroot.c (main): Use EXIT_CANCELED, not EXIT_FAILURE. * src/env.c (main): Likewise. * src/nice.c (main): Likewise. * src/su.c (change_identity, main): Likewise. * doc/coreutils.texi (chroot invocation, env invocation) (nice invocation, su invocation): Document this. * NEWS: Likewise. * tests/misc/invalid-opt (exit_status): Adjust expected results. * tests/misc/help-version (expected_failure_status): Likewise.
2009-10-23build: prohibit improper use of stat and lstatEric Blake
* cfg.mk (sc_prohibit_stat_macro_address): New rule. * src/ln.c (do_link): Adjust comment to avoid false positive. * src/stat.c (do_stat): Likewise. * src/touch.c (main): Likewise.
2009-10-22tail -f: avoid a race conditionGiuseppe Scrivano
* NEWS (Bug fixes): Mention it. * src/tail.c (check_fspec): New function. (tail_forever_inotify): Ensure there is no new data before entering the inotify events wait loop.
2009-10-21md5sum, sha*sum, sum: line-buffer the printed checksumsPádraig Brady
* src/md5sum.c (main): Set stdout to line buffered mode to ensure parallel running instances don't intersperse their output. This adds 5% to the run time in the worst case of many zero length files, or 2% with standard file sizes. * src/sum.c (main): Likewise. * tests/misc/md5sum-parallel: New test for atomic output. * tests/Makefile.am: Reference it. * NEWS: Mention the fix
2009-10-19build: use gnulib's isblank moduleJim Meyering
* bootstrap.conf (gnulib_modules): Add isblank. * src/system.h (isblank): Don't define. * m4/check-decl.m4: Don't check for isblank declaration. * gnulib: Update submodule to latest.
2009-10-18maint: factor out duplication in currently unused rulesJim Meyering
* src/Makefile.am (fs_normalize_perl_subst): Define. (fs-magic, fs-kernel-magic): Use it.
2009-10-17touch: add -h to change symlink timestamps, where supportedEric Blake
* src/touch.c (no_dereference): New flag variable. (longopts): Add -h/--no-dereference. (touch): Add symlink handling. (usage): Document new option. (main): Accept new option. * NEWS: Document it. * doc/coreutils.texi (touch invocation): Likewise. Also mention birthtime. * tests/touch/no-dereference: New test. * tests/Makefile.am (TESTS): Run it.
2009-10-13tail: add add missing backslash at the end of a line in usageC de-Avillez
* src/tail.c (usage): Add missing backslash at the end of a line.
2009-10-12tail: tweak usage for more clarityEric Blake
* src/tail.c (usage): Spell out -n +K. * THANKS: Update. Reported by Jan-Pawel Wrozstinski.
2009-10-10touch: optimize use of utimensEric Blake
* src/touch.c (main): Use UTIME_NOW rather than calling gettime. (touch): Use UTIME_OMIT rather than stat.
2009-10-10copy: allow symlink timestamp preservation on more systemsEric Blake
* src/copy.c (utimens_symlink): Simplify by using lutimens. * m4/jm-macros.m4 (coreutils_MACROS): Drop utimensat; gnulib does this for us. * tests/cp/preserve-slink-time: Recognize lutimes support.