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2015-03-04tee: generalize the --write-error option to --output-errorPádraig Brady
Adjust commit v8.23-140-gfdd6ebf to add the --output-error option instead of --write-error, and treat open() errors like write() errors. * doc/coreutils.texi (tee invocation): s/write-error/output-error/. * src/tee.c (main): Exit on open() error if appropriate. * tests/misc/tee.sh: Add a case to test open() errors. * NEWS: Adjust for the more general output error behavior. Suggested by Bernhard Voelker.
2015-02-24tee: add --write-error to control handling of closed pipesPádraig Brady
tee is very often used with pipes and this gives better control when writing to them. There are 3 classes of file descriptors that tee can write to: files(1), pipes(2), and early close pipes(3). Handling write errors to 1 & 2 is supported at present with the caveat that failure writing to any pipe will terminate tee immediately. Handling write errors to type 3 is not currently supported. To improve the supported combinations we add these options: --write-error=warn Warn if error writing any output including pipes. Allows continued writing to still open files/pipes. Exit status is failure if any output had error. --write-error=warn-nopipe, -p Warn if error writing any output except pipes. Allows continued writing to still open files/pipes. Exit status is failure if any non pipe output had error. --write-error=exit Exit if error writing any output including pipes. --write-error=exit-nopipe Exit if error writing any output except pipes. Use the "nopipe" variants when files are of types 1 and 3, otherwise use the standard variants with types 1 and 2. A caveat with the above scheme is that a combination of pipe types (2 & 3) is not supported robustly. I.e. if you use the "nopipe" variants when using both type 2 and 3 pipes, then any "real" errors on type 2 pipes will not be diagnosed. Note also a general issue with type 3 pipes that are not on tee's stdout, is that shell constructs don't allow to distinguish early close from real failures. For example `tee >(head -n1) | grep -m1 ..` can't distinguish between an error or an early close in "head" pipe, while the fail on the grep part of the pipe is distinguished independently from the resulting pipe errors. This is a general issue with the >() construct, rather than with tee itself. * NEWS: Mention the new feature. * doc/coreutils.texi (tee invocation): Describe the new option. * src/tee.c (usage): Likewise. (main): With --write-error ignore SIGPIPE, and handle the various exit, diagnostics combinations. * tests/misc/tee.sh: Tess all the new options. Fixes http://bugs.gnu.org/11540
2015-02-23tee: close "-" fileBernhard Voelker
This is a cleanup to the previous commit v8.23-138-g7ceaf1d. * src/tee.c (tee_files): Do not exempt the "-" file from being closed, as this is no longer stdout but a normal file.
2015-02-20tee: treat '-' operand as file name as mandated by POSIXBernhard Voelker
Since v5.2.1-1247-g8dafbe5, tee(1) treated '-' as stdout while POSIX explicitly requires to treat this as a file name. Revert this change, as the interleaved output - due to sending another copy of input to stdout - is not considered to be useful. Discussed in http://lists.gnu.org/archive/html/coreutils/2015-02/msg00085.html * src/tee.c (tee_files): Remove the special handling for "-" operands. (usage): Remove the corresponding sentence. * doc/coreutils.texi (common options): Remove the "tee -" example. (tee invocation): Document that tee(1) now treats "-" as a file name. * tests/misc/tee.sh: Add a test case for "tee -". While at it, re-indent the above multi-argument processing case and extend that to 13 operands, as POSIX mandates that, too. * tests/misc/tee-dash.sh: Remove now-obsolete test. * tests/local.mk (all_tests): Remove the above test. * NEWS (Changes in behavior): Mention the change.
2015-02-18tee: exit early if no more writable outputsPádraig Brady
* src/tee.c (main): Don't continue reading if we can't output anywhere. * tests/misc/tee.sh: Ensure we exit when no more outputs. * NEWS: Mention the change in behavior.
2015-01-01maint: update all copyright year number rangesPádraig Brady
Run "make update-copyright" and then... * tests/sample-test: Adjust to use the single most recent year. * tests/du/bind-mount-dir-cycle-v2.sh: Fix case in copyright message, so that year is updated automatically in future.
2014-09-19doc: output correct --help references with --program-prefixPádraig Brady
* src/system.h (emit_ancillary_info): Take the invariant PROGRAM_NAME as a parameter, so that consistent references are made to online docs and texinfo nodes, when a --program-prefix is in place. Note the man pages don't need this fix as they're generated before the program prefix is used. * NEWS: Mention the improvements in references to online documentation.
2014-09-08maint: prefer 'return status;' to 'exit (status);' in 'main'Paul Eggert
* build-aux/gen-single-binary.sh: Don't use ATTRIBUTE_NORETURN for main functions. * src/base64.c, src/basename.c, src/cat.c, src/chcon.c, src/chgrp.c: * src/chmod.c, src/chown.c, src/chroot.c, src/cksum.c, src/comm.c: * src/cp.c, src/csplit.c, src/cut.c, src/date.c, src/dd.c, src/df.c: * src/dircolors.c, src/dirname.c, src/du.c, src/echo.c, src/env.c: * src/expand.c, src/expr.c, src/factor.c, src/fmt.c, src/fold.c: * src/getlimits.c, src/groups.c, src/head.c, src/hostid.c: * src/hostname.c, src/id.c, src/install.c, src/join.c, src/kill.c: * src/link.c, src/ln.c, src/logname.c, src/ls.c, src/make-prime-list.c: * src/md5sum.c, src/mkdir.c, src/mkfifo.c, src/mknod.c, src/mktemp.c: * src/mv.c, src/nice.c, src/nl.c, src/nohup.c, src/nproc.c: * src/numfmt.c, src/od.c, src/paste.c, src/pathchk.c, src/pinky.c: * src/pr.c, src/printenv.c, src/printf.c, src/ptx.c, src/pwd.c: * src/readlink.c, src/realpath.c, src/rm.c, src/rmdir.c, src/runcon.c: * src/seq.c, src/shred.c, src/shuf.c, src/sleep.c, src/sort.c: * src/split.c, src/stat.c, src/stdbuf.c, src/stty.c, src/sum.c: * src/sync.c, src/tac.c, src/tail.c, src/tee.c, src/timeout.c: * src/touch.c, src/tr.c, src/true.c, src/truncate.c, src/tsort.c: * src/tty.c, src/uname.c, src/unexpand.c, src/uniq.c, src/unlink.c: * src/uptime.c, src/users.c, src/wc.c, src/who.c, src/whoami.c: In 'main' functions, Prefer 'return status;' to 'exit (status);'. * src/coreutils-arch.c (_single_binary_main_uname) (_single_binary_main_arch): * src/coreutils-dir.c, src/coreutils-vdir.c (_single_binary_main_ls) (_single_binary_main_dir, _single_binary_main_vdir): Omit ATTRIBUTE_NORETURN. Return a value. * src/coreutils.c (SINGLE_BINARY_PROGRAM): Omit ATTRIBUTE_NORETURN. (launch_program): Now static. * src/dd.c (finish_up): New function. (quit, main): Use it. * src/getlimits.c (main): Return a proper exit status. * src/test.c (test_main_return): New macro. (main): Use it. * src/logname.c, src/nohup.c, src/whoami.c: Use 'error' to simplify exit status in 'main' function. * src/yes.c (main): Use 'return' rather than 'error' to exit, so that GCC doesn't suggest ATTRIBUTE_NORETURN.
2014-01-02maint: update all copyright year number rangesBernhard Voelker
Run "make update-copyright", but then also run this, perl -pi -e 's/2\d\d\d-//' tests/sample-test to make that one script use the single most recent year number.
2013-01-01maint: update all copyright year number rangesJim Meyering
Run "make update-copyright", but then also run this, perl -pi -e 's/2\d\d\d-//' tests/sample-test to make that one script use the single most recent year number.
2012-01-27maint: use single copyright year rangeJim Meyering
Run "make update-copyright".
2012-01-09maint: src/*.c: change remaining quotes (without embedded spaces)Jim Meyering
Run this (twice): git grep -E -l '`[^ ]+'\' src/*.c \ |xargs perl -pi -e 's/`([^ ]+'\'')/'\''$1/'
2012-01-07maint: use new emit_try_help in place of equivalent fprintfJim Meyering
Run this command: perl -0777 -pi -e \ 's/fprintf \(stderr, _\("Try `%s --help.*\n.*;/emit_try_help ();/m'\ src/*.c
2012-01-01maint: update all copyright year number rangesJim Meyering
Run "make update-copyright".
2011-01-30copy, tee: assume EINTR is always defined: remove #ifdefsJim Meyering
Don't use "#ifdef EINTR". dd.c has been doing that since 2004. * src/copy.c (sparse_copy): Remove #ifdef...#endif around EINTR use. * src/tee.c (tee_files): Remove #ifdef...#endif around EINTR use. If we need it, add something like this in system.h: /* When EINTR is not defined, define it to an improbable value so that each use does not have to be #ifdef'd. */ #ifndef EINTR # define EINTR 999988 #endif
2011-01-01maint: update all copyright year number rangesJim Meyering
Run "make update-copyright".
2010-07-22provide POSIX_FADV_SEQUENTIAL hint to appropriate utilsPádraig Brady
Following on from commit dae35bac, 01-03-2010, "sort: inform the system about our input access pattern" apply the same hint to all appropriate utils. This currently gives around a 5% speedup for reading large files from fast flash devices on GNU/Linux. * src/base64.c: Call fadvise (..., FADVISE_SEQUENTIAL); * src/cat.c: Likewise. * src/cksum.c: Likewise. * src/comm.c: Likewise. * src/cut.c: Likewise. * src/expand.c: Likewise. * src/fmt.c: Likewise. * src/fold.c: Likewise. * src/join.c: Likewise. * src/md5sum.c: Likewise. * src/nl.c: Likewise. * src/paste.c: Likewise. * src/pr.c: Likewise. * src/ptx.c: Likewise. * src/shuf.c: Likewise. * src/sum.c: Likewise. * src/tee.c: Likewise. * src/tr.c: Likewise. * src/tsort.c: Likewise. * src/unexpand.c: Likewise. * src/uniq.c: Likewise. * src/wc.c: Likewise, unless we don't actually read().
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
2009-09-21doc: 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
2009-08-25global: 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 : $_'
2009-06-23maint: update all Copyright year lists to include 2009Jim Meyering
2008-11-10use xfreopen in place of unchecked freopenJim Meyering
* bootstrap.conf (modules): Add xfreopen. * src/cat.c (main): Include "xfreopen.h". Use xfreopen. * src/cksum.c (cksum): Likewise. * src/head.c (head_file, main): Likewise. * src/md5sum.c (digest_file): Likewise. * src/od.c (open_next_file): Likewise. * src/split.c (type_undef): Likewise. * src/sum.c (bsd_sum_file, sysv_sum_file): Likewise. * src/tac.c (tac_file, main): Likewise. * src/tail.c (tail_file, main): Likewise. * src/tee.c (tee_files): Likewise. * src/tr.c (main): Likewise. * src/wc.c (wc_file): Likewise. * po/POTFILES.in: Add lib/xfreopen.c
2008-06-27avoid a -Wsign-compare warningJim Meyering
* src/tee.c (tee_files): Swap fwrite's size/n_elem args and compare the return value against "1".
2008-06-16remove redundant const directivesJim Meyering
In 1463824d8e7f72c31f1d803d7cfe2b608ccafc5c, I added some missing "const" directives, as well as some new, redundant ones. This removes the redundant ones. Pointed out by Eric Blake. * base64.c, cat.c, chcon.c, chgrp.c, chmod.c, chown.c, comm.c: * cp.c, csplit.c, cut.c, date.c, dd.c, df.c, dircolors.c, du.c: * env.c, expand.c, fmt.c, fold.c, groups.c, head.c, id.c: * install.c, join.c, kill.c, ln.c, ls.c, md5sum.c, mkdir.c: * mkfifo.c, mknod.c, mktemp.c, mv.c, nice.c, nl.c, od.c: * paste.c, pathchk.c, pinky.c, pr.c, ptx.c, readlink.c, rm.c: * rmdir.c, runcon.c, seq.c, shred.c, shuf.c, sort.c, split.c: * stat.c, stty.c, su.c, sum.c, tac.c, tail.c, tee.c, timeout.c: * touch.c, tr.c, truncate.c, tty.c, uname.c, unexpand.c, uniq.c: * wc.c, who.c: Remove redundant const directives. * maint.mk (sc_const_long_option): Don't require redundant "const".
2008-06-14add "const" attribute, where possibleJim Meyering
* maint.mk (sc_const_long_option): New rule. Enforce global change. * src/base64.c (long_options): Use "const" where possible. * src/cat.c (main): Likewise. * src/chcon.c (long_options): Likewise. * src/chgrp.c (long_options): Likewise. * src/chmod.c (long_options): Likewise. * src/chown.c (long_options): Likewise. * src/comm.c (long_options, OUTPUT_DELIMITER_OPTION): Likewise. * src/cp.c (long_opts): Likewise. * src/csplit.c (longopts): Likewise. * src/cut.c (longopts): Likewise. * src/date.c (long_options): Likewise. * src/dd.c (conversions, flags, statuses): Likewise. * src/df.c (long_options): Likewise. * src/dircolors.c (long_options): Likewise. * src/du.c (long_options): Likewise. * src/env.c (longopts): Likewise. * src/expand.c (longopts): Likewise. * src/fmt.c (long_options): Likewise. * src/fold.c (longopts): Likewise. * src/groups.c (longopts): Likewise. * src/head.c (long_options): Likewise. * src/id.c (longopts): Likewise. * src/install.c (long_options): Likewise. * src/join.c (longopts): Likewise. * src/kill.c (long_options): Likewise. * src/ln.c (long_options): Likewise. * src/ls.c (long_time_format, long_options, sort_functions): Likewise. * src/md5sum.c (long_options): Likewise. * src/mkdir.c (longopts): Likewise. * src/mkfifo.c (longopts): Likewise. * src/mknod.c (longopts): Likewise. * src/mktemp.c (longopts): Likewise. * src/mv.c (long_options): Likewise. * src/nice.c (longopts): Likewise. * src/nl.c (longopts): Likewise. * src/od.c (charname, long_options): Likewise. * src/paste.c (longopts): Likewise. * src/pathchk.c (longopts): Likewise. * src/pinky.c (longopts): Likewise. * src/pr.c (long_options): Likewise. * src/ptx.c (long_options): Likewise. * src/readlink.c (longopts): Likewise. * src/rm.c (long_opts): Likewise. * src/rmdir.c (longopts): Likewise. * src/runcon.c (long_options): Likewise. * src/seq.c (long_options): Likewise. * src/shred.c (long_opts): Likewise. * src/shuf.c (long_opts): Likewise. * src/sort.c (monthtab, long_options): Likewise. * src/split.c (longopts): Likewise. * src/stat.c (long_options): Likewise. * src/stty.c (mode_info, control_info, longopts, set_mode) Likewise. (set_control_char, speeds): Likewise. * src/su.c (longopts): Likewise. * src/sum.c (longopts): Likewise. * src/tac.c (longopts): Likewise. * src/tail.c (long_options): Likewise. * src/tee.c (long_options): Likewise. * src/timeout.c (long_options): Likewise. * src/touch.c (longopts): Likewise. * src/tr.c (long_options): Likewise. * src/truncate.c (longopts): Likewise. * src/tty.c (longopts): Likewise. * src/uname.c (uname_long_options, arch_long_options): Likewise. * src/unexpand.c (longopts): Likewise. * src/uniq.c (longopts): Likewise. * src/wc.c (longopts): Likewise. * src/who.c (longopts): Likewise.
2008-06-03use gnulib's progname moduleJim Meyering
* bootstrap.conf (gnulib_modules): Add progname. * src/*.c (program_name): Remove declaration. * (main): Call set_program_name rather than setting program_name. * src/nice.c (main): Cast program_name to "(char *)". * src/prog-fprintf.c: Include "system.h" * src/system.h: Include "progname.h". * maint.mk (sc_program_name): Adjust rule. Suggestion from Eric Blake.
2008-06-02declare program_name consistentlyJim Meyering
* src/base64.c: Likewise. * src/basename.c: Likewise. * src/cat.c: Likewise. * src/chcon.c: Likewise. * src/chgrp.c: Likewise. * src/chmod.c: Likewise. * src/chown.c: Likewise. * src/chroot.c: Likewise. * src/cksum.c: Likewise. * src/comm.c: Likewise. * src/cp.c: Likewise. * src/csplit.c: Likewise. * src/cut.c: Likewise. * src/date.c: Likewise. * src/dd.c: Likewise. * src/df.c: Likewise. * src/dircolors.c: Likewise. * src/dirname.c: Likewise. * src/du.c: Likewise. * src/echo.c: Likewise. * src/env.c: Likewise. * src/expand.c: Likewise. * src/expr.c: Likewise. * src/factor.c: Likewise. * src/fmt.c: Likewise. * src/fold.c: Likewise. * src/groups.c: Likewise. * src/head.c: Likewise. * src/hostid.c: Likewise. * src/hostname.c: Likewise. * src/id.c: Likewise. * src/install.c: Likewise. * src/join.c: Likewise. * src/kill.c: Likewise. * src/link.c: Likewise. * src/ln.c: Likewise. * src/logname.c: Likewise. * src/ls.c: Likewise. * src/md5sum.c: Likewise. * src/mkdir.c: Likewise. * src/mkfifo.c: Likewise. * src/mknod.c: Likewise. * src/mktemp.c: Likewise. * src/mv.c: Likewise. * src/nice.c: Likewise. * src/nl.c: Likewise. * src/nohup.c: Likewise. * src/od.c: Likewise. * src/paste.c: Likewise. * src/pathchk.c: Likewise. * src/pinky.c: Likewise. * src/pr.c: Likewise. * src/printenv.c: Likewise. * src/printf.c: Likewise. * src/ptx.c: Likewise. * src/pwd.c: Likewise. * src/readlink.c: Likewise. * src/rm.c: Likewise. * src/rmdir.c: Likewise. * src/runcon.c: Likewise. * src/seq.c: Likewise. * src/setuidgid.c: Likewise. * src/shuf.c: Likewise. * src/sleep.c: Likewise. * src/sort.c: Likewise. * src/split.c: Likewise. * src/stat.c: Likewise. * src/stty.c: Likewise. * src/su.c: Likewise. * src/sum.c: Likewise. * src/sync.c: Likewise. * src/tac.c: Likewise. * src/tail.c: Likewise. * src/tee.c: Likewise. * src/test.c: Likewise. * src/timeout.c: Likewise. * src/touch.c: Likewise. * src/tr.c: Likewise. * src/true.c: Likewise. * src/tsort.c: Likewise. * src/tty.c: Likewise. * src/uname.c: Likewise. * src/unexpand.c: Likewise. * src/uniq.c: Likewise. * src/unlink.c: Likewise. * src/uptime.c: Likewise. * src/users.c: Likewise. * src/wc.c: Likewise. * src/who.c: Likewise. * src/whoami.c: Likewise. * src/yes.c: Likewise.
2008-05-26adjust copyright datesJim Meyering
2008-05-26convert 3-author programs to use proper_nameJim Meyering
g grep -E -l 'define AUTHORS "[^,]+", "[^,]+", "[^,]+"$'|xargs perl -pi -e \ 's/(define AUTHORS) ("[^,]+"), ("[^,]+"), ("[^,]+")$/$1 \\\n proper_name ($2), \\\n proper_name ($3), \\\n proper_name ($4)/'
2007-07-23Update all copyright notices to use the newer form.Jim Meyering
2007-07-10Change "version 2" to "version 3" in all copyright notices.Jim Meyering
2007-03-28Help translators include translation team's web or email address.Jim Meyering
* src/system.h (emit_bug_reporting_address): New function. * src/base64.c: Use it rather than a literal printf. * src/basename.c, src/cat.c, src/chgrp.c, src/chmod.c: * src/chown.c, src/chroot.c, src/cksum.c, src/comm.c, src/cp.c: * src/csplit.c, src/cut.c, src/date.c, src/dd.c, src/df.c: * src/dircolors.c, src/dirname.c, src/du.c, src/echo.c, src/env.c: * src/expand.c, src/expr.c, src/factor.c, src/fmt.c, src/fold.c: * src/head.c, src/hostid.c, src/hostname.c, src/id.c, src/install.c: * src/join.c, src/kill.c, src/link.c, src/ln.c, src/logname.c: * src/ls.c, src/md5sum.c, src/mkdir.c, src/mkfifo.c, src/mknod.c: * src/mv.c, src/nice.c, src/nl.c, src/nohup.c, src/od.c: * src/paste.c, src/pathchk.c, src/pinky.c, src/pr.c, src/printenv.c: * src/printf.c, src/ptx.c, src/pwd.c, src/readlink.c, src/rm.c: * src/rmdir.c, src/seq.c, src/setuidgid.c, src/shred.c, src/shuf.c: * src/sleep.c, src/sort.c, src/split.c, src/stat.c, src/stty.c: * src/su.c, src/sum.c, src/sync.c, src/system.h, src/tac.c: * src/tail.c, src/tee.c, src/test.c, src/touch.c, src/tr.c: * src/true.c, src/tsort.c, src/tty.c, src/uname.c, src/unexpand.c: * src/uniq.c, src/unlink.c, src/uptime.c, src/users.c, src/wc.c: * src/who.c, src/whoami.c, src/yes.c: Likewise.
2006-12-12* src/system.h (SETVBUF): Remove definition, now that theJim Meyering
autoconf macro, AC_FUNC_SETVBUF_REVERSED, does nothing. * src/tee.c (tee_files): s/SETVBUF/setvbuf/. * src/od.c (open_next_file): Likewise.
2006-06-22* src/tee.c (tee_files): Rename from tee, to avoid conflict withJim Meyering
the function in glibc's <fcntl.h>. Reported by Andreas Schwab.
2005-07-11(tee): Avoid setmode; use POSIX-specified routines instead.Paul Eggert
2005-07-09Don't include stdio.h; no longer needed.Paul Eggert
2005-07-03Include stdio--.h, not stdio-safer.h.Paul Eggert
(tee): Don't call fopen_safer; no longer needed now that we include stdio--.h.
2005-05-14Update FSF postal mail address.Jim Meyering
2005-05-14Update FSF postal mail address.Jim Meyering
2005-04-11Include stdio-safer.h.Paul Eggert
(tee): Use fopen_safer.
2005-04-05(tee): When closing files, do not close stdout,Jim Meyering
leave this job to close_stdout() instead. From Dmitry V. Levin.
2004-09-21Remove unused "case 0".Paul Eggert
2004-08-10(usage, tee): "tee -" writes to standard output, notPaul Eggert
to a file named "-".
2004-08-03(tee, append, ignore_interrupts, main, tee):Paul Eggert
Use bool for booleans. (tee): Use ssize_t for read returns.
2004-04-21(main): Do not ignore SIGPIPE, as POSIX 1003.1-2001Jim Meyering
does not allow this. This undoes the 1996-10-24 patch.
2004-04-20(main) [!defined _POSIX_SOURCE]:Jim Meyering
Use simpler "signal (sig, SIG_DFL)" rather than sigaction equivalent.
2004-01-21(usage): Use EXIT_SUCCESS, not 0, for clarity.Jim Meyering
2004-01-04(tee): Use xnmalloc rather than xmalloc.Jim Meyering
2003-10-18Most .c files (AUTHORS): Revert the WRITTEN_BY/AUTHORS changeJim Meyering
of 2003-09-19. Now, AUTHORS is a comma-separated list of strings. Update the call to parse_long_options so that `AUTHORS, NULL' are the last parameters. * src/true.c (main): Append NULL to version_etc argument list. * src/sys2.h (case_GETOPT_VERSION_CHAR): Likewise.
2003-09-23(tee): Adjust fwrite arguments so that the returnJim Meyering
value is the number of bytes written.
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