Re: command date
On Mon, Aug 10, 2009 at 20:40, Dmitri Ivanov wrote: > > echo $[ $(date --date="090309" +%s) - $(date --date="090308" +%s) ] > gives 82800 instead of 86400. > It seems that 1 hour is lost only for a special date: Mar 9, 2009 > > Dmitri Ivanov > > > Daylight-saving time transition in USA.
command date
echo $[ $(date --date="090309" +%s) - $(date --date="090308" +%s) ] gives 82800 instead of 86400. It seems that 1 hour is lost only for a special date: Mar 9, 2009 Dmitri Ivanov
chmod feature request: setting different modes for files and directories
Dear coreutils maintainers,
I'd like to ask for an often needed feature of chmod: the ability to
set different modes for files and directories. I will briefly explain
the need, and then propose a possible syntax.
For example, to make a directory setgid, one needs to give the setgid
permission to all sub-directories already present, but not to the
files. Currently one has to write something like this:
find some/path -type d -exec chmod g+s {} +
Or some variation with -print0 and xargs. The same is true when
someone extracts some files from an archive or copies them over a
removable media, where permissions need to be reset to something sane,
like 755/644:
chmod -R 755 another/path
find another/path -type f -exec chmod 644 {} +
These could all be written more concisely if chmod supported selection
of permissions by inode type. Here is the syntax I'm thinking about,
for the two examples above:
chmod -R d:g+s some/path
chmod -R d:755,f:644 another/path
This is backwards-compatible, intuitive, and concise. The character
before the colon could be made to mimic find's -type option.
Let me know if you'd like me to come up with an implementation, or if
there is some other list where this topic would be more appropriate.
-Tobia
Re: [PATCH] dd: work around buffer length restrictions with oflag=direct (O_DIRECT)
Jim Meyering wrote: > +#ifdef POSIX_FADV_DONTNEED > + off_t off = lseek (STDOUT_FILENO, 0, SEEK_CUR); > + if (0 <= off) > +ignore_value (posix_fadvise (STDOUT_FILENO, > + off, 0, POSIX_FADV_DONTNEED)); > +#endif That reminds me that it would be nice to have [io]flag=stream to read/write files without polluting the cache etc. cheers, Pádraig.
Re: BTRFS file clone support for cp
Giuseppe Scrivano wrote: > Jim Meyering writes: > >> I am now convinced that cp's new behavior belongs on >> a separate option, --reflink (i.e., it should not be the default). >> Giuseppe, do you feel like adding that option and adjusting your >> test accordingly? > > I attached two separate patches, --reflink option and file-clone test. > Last versions of btrfs have a bug (I asked on #btrfs and they confirmed > it), btrfs doesn't use correctly all the free space available. In fact > I get ENOSPC while in reality only 54% is used. Probably it is better > to postpone the second patch inclusion after the bug is fixed. That explains some of the weirdness I noticed. Thanks for looking into it. (there was also weird values for `du cloned_file`) > Another note, I changed this line in the NEWS file: > - "when both the source and destination are on the same btrfs partition." > > considering that BTRFS supports multiple devices I am not convinced that > it is always true, I guess source and destination could be on different > partitions, though I couldn't find a clear answer on the btrfs wiki to > this question. I would very much doubt one could clone outside a single file system. If a file system can span multiple devices/partitions then maybe. In any case would be better to say "file system" rather than "partition", as the latter is not directly related. cheers, Pádraig.
new snapshot available: coreutils-7.4.115-c9c92
I think we are ready for coreutils-7.5, so I have made this snapshot release. If you can test it on cutting-edge systems (both operating systems and file systems), feedback would be most welcome, especially if you can write before the end of the week. coreutils snapshot: http://meyering.net/cu/coreutils-ss.tar.gz 9.4 MB http://meyering.net/cu/coreutils-ss.tar.xz 4.0 MB http://meyering.net/cu/coreutils-ss.tar.gz.sig http://meyering.net/cu/coreutils-ss.tar.xz.sig aka http://meyering.net/cu/coreutils-7.4.115-c9c92.tar.gz http://meyering.net/cu/coreutils-7.4.115-c9c92.tar.xz NEWS == ** Bug fixes dd's oflag=direct option now works even when the size of the input is not a multiple of e.g., 512 bytes. install runs faster again with SELinux enabled [introduced in coreutils-7.0] ls -1U (with two or more arguments, at least one a nonempty directory) would print entry names *before* the name of the containing directory. Also fixed incorrect output of ls -1RU and ls -1sU. [introduced in coreutils-7.0] sort now correctly ignores fields whose ending position is specified before the start position. Previously in numeric mode the remaining part of the line after the start position was used as the sort key. [This bug appears to have been present in "the beginning".] truncate -s failed to skip all whitespace in the option argument in some locales. ** New programs stdbuf: A new program to run a command with modified stdio buffering for its standard streams. ** Changes in behavior ls --color: files with multiple hard links are no longer colored differently by default. That can be enabled by changing the LS_COLORS environment variable. You can control that using the MULTIHARDLINK dircolors input variable which corresponds to the 'mh' LS_COLORS item. Note these variables were renamed from 'HARDLINK' and 'hl' which were available since coreutils-7.1 when this feature was introduced. ** New features chroot now accepts the options --userspec and --groups. cp accepts a new option, --reflink: create a lightweight copy using copy-on-write (COW). This is currently supported only on btrfs file systems. cp now preserves time stamps on symbolic links, when possible cp, install, mv: take advantage of btrfs' O(1) copy-on-write feature when both the source and destination are on the same btrfs partition. sort accepts a new option, --human-numeric-sort (-h): sort numbers while honoring human readable suffixes like KiB and MB etc. tail --follow now uses inotify when possible, to be more responsive to file changes and more efficient when monitoring many files. git shortlog == Changes in coreutils since 7.4.73-0d64b: Giuseppe Scrivano (4): tail: use the inotify backend also with --pid=PID cp: support btrfs' copy-on-write file clone operation tail: exit successfully upon watched process death cp: accept the --reflink option Heikki Orsila (1): tr: improve --help's description of --complement (-c) Jim Meyering (29): build: update from gnulib build: avoid build warn/failure due to -Wstack-protector tests: avoid false-positive cp/link-heap failure tail: adjust type of a local variable doc: point to Guile's ChangeLog-writing guidelines build: update from gnulib readlink: improve one-line summary: prints canonical file names, too build: use a fixed-name temporary in man/Makefile.am tests: new test for bug in ls -1U dir arg ... maint: make update-copyright handle more cases maint: update-copyright: fix just-introduced bug maint: update sleep.c's copyright year list maint: update NEWS maint: make update-copyright work in yet another case maint: move update-copyright to gnulib tests: test for just-fixed tail --pid bug tail: tweak indentation tests: new function: require_openat_support_ build: update to a usable gnulib commit build: *really* update to a usable gnulib commit maint: move the update-copyright rule to gnulib's maint.mk cp -pP (and e.g., -a): preserve time stamps on symlinks, too dd: remove unnecessary #if HAVE_FTRUNCATE dd: work around buffer length restrictions with oflag=direct (O_DIRECT) maint: move selinux-at module from gl/ to gnulib dd: preserve semantics of O_DIRECT even for final block build: update from gnulib, for HOST_NAME_MAX on solaris 10 nl, pinky: replace uses of strcat tests: raise ulimit virt-mem limit to avoid new failure Joel E. Denny (1): maint: improve update-copyright rule Kamil Dudka (3): doc: improve readlink description here, too ls -1U dir arg ... now works again install runs faster again with SELinux enabled Ondřej Vašík (1): copy.c: remov
[PATCH] nl, pinky: replace uses of strcat
>From e32320de66f0587f288803330ea5e09341297153 Mon Sep 17 00:00:00 2001 From: Jim Meyering Date: Mon, 10 Aug 2009 08:11:33 +0200 Subject: [PATCH] nl, pinky: replace uses of strcat * src/nl.c (main): Avoid strcat, on principle. Use stpcpy instead. * src/pinky.c (print_long_entry): Likewise. --- src/nl.c|6 +++--- src/pinky.c | 12 2 files changed, 7 insertions(+), 11 deletions(-) diff --git a/src/nl.c b/src/nl.c index 56d5a39..2deb314 100644 --- a/src/nl.c +++ b/src/nl.c @@ -577,15 +577,15 @@ main (int argc, char **argv) header_del_len = len * 3; header_del = xmalloc (header_del_len + 1); - strcat (strcat (strcpy (header_del, section_del), section_del), section_del); + stpcpy (stpcpy (stpcpy (header_del, section_del), section_del), section_del); body_del_len = len * 2; body_del = xmalloc (body_del_len + 1); - strcat (strcpy (body_del, section_del), section_del); + stpcpy (stpcpy (body_del, section_del), section_del); footer_del_len = len; footer_del = xmalloc (footer_del_len + 1); - strcpy (footer_del, section_del); + stpcpy (footer_del, section_del); /* Initialize the input buffer. */ initbuffer (&line_buf); diff --git a/src/pinky.c b/src/pinky.c index 2505236..8ddd218 100644 --- a/src/pinky.c +++ b/src/pinky.c @@ -363,10 +363,8 @@ print_long_entry (const char name[]) char buf[1024]; const char *const baseproject = "/.project"; char *const project = - xmalloc (strlen (pw->pw_dir) + strlen (baseproject) + 1); - - strcpy (project, pw->pw_dir); - strcat (project, baseproject); +xmalloc (strlen (pw->pw_dir) + strlen (baseproject) + 1); + stpcpy (stpcpy (project, pw->pw_dir), baseproject); stream = fopen (project, "r"); if (stream) @@ -389,10 +387,8 @@ print_long_entry (const char name[]) char buf[1024]; const char *const baseplan = "/.plan"; char *const plan = - xmalloc (strlen (pw->pw_dir) + strlen (baseplan) + 1); - - strcpy (plan, pw->pw_dir); - strcat (plan, baseplan); +xmalloc (strlen (pw->pw_dir) + strlen (baseplan) + 1); + stpcpy (stpcpy (plan, pw->pw_dir), baseplan); stream = fopen (plan, "r"); if (stream) -- 1.6.4.284.g34125
