Only use return value from system call if system call succeeded.
Tested with `make world` and some of my own scripts.
This should be MFCed soon. While /bin/sh is hard to test the fix is
obviously correct and can be assumed not to break something else
(famous last words...).
Joe Marcus Clarke <marcus@FreeBSD.ORG>, subshells could lose a
non-zero exit status.
This commit is Joe's proposed patch. Thanks!
I verified that the problem Joe found is fixed and I ran a full world
with this patch.
I don't plan to ever commit language patches to /bin/sh again. It is
a minefield too big to navigate without a full-time committment, which
I am not willing to do on our /bin/sh.
Under normal circumstances I would recommend using NetBSD's sh which
has a lot of language fixes (like the ones what these patches were
about) but unfortunately they had implemented broken signal behaviour
for shellscript containing interactive programs. Similar issues apply
to pdksh which is OpenBSD's sh.
From my perspective bash2 is the only really working bourne sh out
there and that one is GPLed. Oh well.
from log[10](largest file size), but when outputting in human-friendly
format the width is always at most 4. (eg. "123K", " 12K", "1.2K".)
PR: bin/59320
Approved by: rwatson (mentor)
* Remove mention of '>', 'A', and 'S' states
* Mention 'W' state.
* List 'J' state in the correct location.
* Sync with flags in sys/proc.h
Approved by: rwatson (mentor)
MFC after: 7 days
should slightly reduce the number of system calls in critical portions of
the shell, and select a more efficient path through the fdalloc code.
Reviewed by: bde
- Unify the conditional assignments section so that architectural
exclusions come first, then options and !options, sorted by the
option name, also in directory order, then architecture specific
sections, sorted by the architecture name, with i386 being a
traditional exception.
Prodded by: bde
o When fts_read() cannot stat the file, it can't be unlinked. At
that case, don't display error message when -f flag is used.
Obtained from: bde
PR: kern/16815, bin/35842
Reported by: kuriyama, Aleksandr A. Babaylov <.@babolo.ru>
sh -e behaviour was incorrect when && and || statements where used in
"if" clauses.
This is the patch submitted by MORI Kouji <mori@tri.asanuma.co.jp>.
It fixes the issue at hand, but sh fixes like this are super-hard to
verify that they don't break anything else. I ran some of my old test
cases and a few big GNU configure scripts that detected mistakes
before, with the previous sh, patched sh and bash. No differences in
behaviour found. MFC recommended after longer than usual time.
Compiles on i386 and sledge.
to gcc have not been made for ia64, which means that executables still
have /usr/libexec/ld-elf.so.1 as the dynamic linker. This simply does
not work if /usr is a seperate filesystem not mounted when the kernel
tries to execute init(8).
Note that this is a temporary fix until a new gcc has been imported
that does have the required changes.
Approved: re@
dynamically linked. This has been a long time coming with the move of
critical libraries from /usr/lib to /lib. If you don't feel comfortable
with dynamically linked binaries in your root partition, now is the
time to define NO_DYNAMICROOT in your make.conf.
Approved by: re
accurate reporting of multi-terabyte filesystem sizes.
You should build and boot a new kernel BEFORE doing a `make world'
as the new kernel will know about binaries using the old statfs
structure, but an old kernel will not know about the new system
calls that support the new statfs structure. Running an old kernel
after a `make world' will cause programs such as `df' that do a
statfs system call to fail with a bad system call.
Reviewed by: Bruce Evans <bde@zeta.org.au>
Reviewed by: Tim Robbins <tjr@freebsd.org>
Reviewed by: Julian Elischer <julian@elischer.org>
Reviewed by: the hoards of <arch@freebsd.org>
Sponsored by: DARPA & NAI Labs.
do only unlink the file if we could indeed overwrite the file.
Old behaviour: rm -P /tmp/foo (foo mode 0444) would NOT overwrite foo,
but still delete it (with a warning: rm: foo: Permission denied)
New behaviour: Just the EPERM warning, but no deletion
Reviewed by: bde
rm_overwrite() (for rm -P).
2. Print the file name in the error message for (fatal) malloc() failures
in rm_overwrite(). I first thought that malloc() failures should be
non-fatal since they don't prevent proceeding the the next file, but
making them non-fatal would normally give too much output for rm -Pr
on a large tree in the unlikely event that even one occurs, since the
malloc()ed amounts are usually the same. Just print the file name since
the malloc()ed amounts are not always the same and it doesn't hurt to
know where rm was when it quit.
Submitted by: guido ((1) and original version of (2))
- Issue a single writev(2) call instead of multiple write(2)s.
This change improves the inefficiencies introduced when echo
went on an stdio diet.
The following figures are for echoing 1000 arguments.
original stdio-based echo:
0.01 real 0.01 user 0.00 sys
before:
0.05 real 0.00 user 0.04 sys
after:
0.01 real 0.00 user 0.00 sys
when grepping for JOBS. The recent style cleanup replaced the space with
a tab and broke job control detection. Little edits, disastrous consequences.
Submitted by: Peter Edwards <pmedwards@eircom.net>
X-MFC when: in about 5 weeks with the other sh arithmetic fixes.
WITH_DYNAMICROOT, which will toggle the generation of dynamically-linked
binaries for installation in /bin and /sbin. It is currently off,
meaning that /bin and /sbin are still statically linked by default.
If something goes wrong (which I hope doesn't), this is what /rescue is
all about. Please do not try to use WITH_DYNAMICROOT and NO_RESCUE to
save space or some other equally silly reason. If you do and end up
having problems, you have been warned.
tools such as chmod(1) and ls(1) when it comes to acting on objects
that have POSIX.1e extended ACLs. Specifically, discuss the
substitution of the mask entry for the group entry in the mode
representation of the ACL. Differently worded from the submission,
and could probably use further refinement.
PR: 55319
Submitted by: Grzegorz Czaplinski <G.Czaplinski@prioris.mini.pw.edu.pl>
- Removed dead declarations
- Made objects that should have been declared as static, static.
The changes use STATIC instead of static, following the existing
convention in the rest of the code.
Approved by: schweikh (mentor)
MFC after: 2 weeks
cat ${.ALLSRC} > ${.TARGET}
rather than
ln -sf ${.ALLSRC} ${.TARGET}
not to depends on absolute-path of symbolic links.
Commented by: marcel, obrien, bde
is a style bug at best. When the variable isn't a flag, it potentially
overflows after a large number of settings. Here the number of settings
is limited by ARG_MAX, but the variable is the exit code so it became
bogus after the second setting and effectively overflowed to 0 after
approx. 128 settings.
Fixed some style bugs involving comments in and near previous commit.
Clarification of previous commit message: df -t didn't give undefined
behaviour, and the behaviour used to conform perfectly with the man
page, since the buggy behaviour is documented in the BUGS section. -t
just worked when no files or file systems were specified, and was just
ignored if a file or file system was specified.
-t Only print out statistics for filesystems of the specified types.
Make the behavior of df(1) conform to its man page (behavior is otherwise
undefined).
Submitted by: Rob Braun <bbraun@apple.com>
Obtained from: Apple
output buffer, don't insert them at all. This prevents a buffer
*underrun* when the substitution consists completely of newlines
(e.g. `echo`) and the byte before the source buffer to which p
points is a '\n', in which case more characters would be removed
from the output buffer than were inserted.
This fixes certain port builds on sparc64.
Approved by: re (scottl)
Reviewed by: des, tjr
Due to the use of signed vs. unsigned chars on our various platforms, one gets
"warning: comparison is always true due to limited range of data type"
from GCC 3.3.
