Commit Graph

14327 Commits

Author SHA1 Message Date
Denys Vlasenko
f8f81ed7aa Convert all procps/* applets to "new style" applet definitions
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-11-23 06:23:44 +01:00
Denys Vlasenko
f88e3bfa8d Convert all miscutils/* applets to "new style" applet definitions
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-11-22 23:54:17 +01:00
Denys Vlasenko
fb4da16711 Split miscutils/Config.src items into miscutils/*.c files
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-11-22 23:14:24 +01:00
Denys Vlasenko
9f8eb1ee76 httpd: explain why we use sprintf and why it should be fine
While at it, fix a pathological case where it is not fine:
-r REALM with some 8-kbyte long REALM would overflow the buffer.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-11-22 02:23:35 +01:00
Denys Vlasenko
7e8218f9b2 Fix allnoconfig warnings
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-11-18 21:42:44 +01:00
Denys Vlasenko
f4d0f4e7a9 applets.h.sh: a script to check applet names against config options
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-11-17 15:34:16 +01:00
Denys Vlasenko
10880cc20f Make mkfs.vfat and mkdosfs individually selectable
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-11-16 16:18:50 +01:00
Denys Vlasenko
0581a2f304 Make mke2fs and mkfs.ext2 individually selectable
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-11-16 16:12:11 +01:00
Denys Vlasenko
eb3fdc843e Make bzcat, lzcat, xzcat, zcat, lzopcat, unlzop individually selectable
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-11-16 15:45:05 +01:00
Denys Vlasenko
a8c696bf09 Make ifup and ifdown individually selectable.
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-11-14 18:31:07 +01:00
Denys Vlasenko
f417ffd88f Make swapon and swapoff individually selectable.
For example, without swapoff, code shrinks by 277 bytes.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-11-14 17:30:50 +01:00
Denys Vlasenko
1924e99ad3 Make grep/egrep/fgrep independently selectable
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-11-14 05:09:48 +01:00
Denys Vlasenko
97e9a72c71 Make halt/poweroff/reboot independently selectable
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-11-14 04:55:04 +01:00
Denys Vlasenko
c314ca9016 Make setarch/linux32/linux64 independently selectable
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-11-13 22:56:04 +01:00
Denys Vlasenko
67fd2f2858 dnsdomainname: split it from "hostname", make it independently selectable
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-11-13 22:35:10 +01:00
Denys Vlasenko
9655f95d0f tar: handle pax-encoded utf8 filenames and link names. Closes 9406
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-11-11 17:56:45 +01:00
Denys Vlasenko
87e039d016 hush: make getch/peek functions directly called
Indirect calls are more difficult to predict.
Unfortunately, on x64 direct call is 5 bytes while indirect "call (reg+ofs)"
is 3 bytes:

function                                             old     new   delta
i_getch                                                -      82     +82
i_peek                                                 -      63     +63
parse_stream                                        2531    2579     +48
parse_dollar                                         771     797     +26
parse_redirect                                       296     321     +25
add_till_closing_bracket                             408     420     +12
encode_string                                        256     265      +9
i_peek_and_eat_bkslash_nl                             93      99      +6
add_till_backquote                                   110     114      +4
parse_and_run_stream                                 139     141      +2
expand_vars_to_list                                 1143    1144      +1
static_peek                                            6       -      -6
setup_string_in_str                                   39      18     -21
setup_file_in_str                                     40      19     -21
static_get                                            27       -     -27
file_peek                                             52       -     -52
file_get                                              65       -     -65
------------------------------------------------------------------------------
(add/remove: 2/4 grow/shrink: 9/2 up/down: 278/-192)           Total: 86 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-11-08 22:35:05 +01:00
Denys Vlasenko
00a06b9715 hush: renumber PIPE_foo, make PIPE_SEQ = 0
PIPE_SEQ is used most often, having it zero makes code smaller:

function                                             old     new   delta
done_word                                            719     707     -12
parse_stream                                        2546    2531     -15

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-11-08 20:35:53 +01:00
Denys Vlasenko
6c635d62d4 hush: small optimization in run_list
I thought gcc can detect this itself. It doesn't.

function                                             old     new   delta
run_list                                            1030    1021      -9

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-11-08 20:26:11 +01:00
Denys Vlasenko
5cc9bf6a21 hush: deindent large block of code, no code changes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-11-08 17:34:44 +01:00
Denys Vlasenko
1eada9ad8d hush: simplify insert_bg_jobs
function                                             old     new   delta
insert_bg_job                                        366     281     -85

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-11-08 17:28:45 +01:00
Denys Vlasenko
830ea35484 hush: make "wait %1" less likely to play with signal mask
Was playing with "sleep 3 | exit 3 & wait %1" and noticed that often
SIGCHLD arrives even before I get to signal masking. Can avoid it in this
case.

function                                             old     new   delta
wait_for_child_or_signal                             228     265     +37

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-11-08 04:59:11 +01:00
Denys Vlasenko
02affb4afd hush: rework "wait %jobspec" to work in non-interactive shells too
Also add tests. wait5.tests so far fails (but works for ash and dash).

function                                             old     new   delta
builtin_wait                                         305     283     -22

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-11-08 00:59:29 +01:00
Denys Vlasenko
26ad94bedc hush: "wait $!; echo $?" should return 127 if $! already exited
It would be nice to provide bash-like "remember las exitcode"
thingy, but it's a bit complex. For now, match ash and dash.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-11-07 23:07:21 +01:00
Denys Vlasenko
62b717b75e hush: implement "wait %jobspec"
function                                             old     new   delta
parse_jobspec                                          -      83     +83
job_exited_or_stopped                                  -      79     +79
builtin_wait                                         236     302     +66
wait_for_child_or_signal                             199     228     +29
checkjobs                                            142     158     +16
builtin_jobs                                          59      68      +9
process_wait_result                                  453     408     -45
builtin_fg_bg                                        272     203     -69
------------------------------------------------------------------------------
(add/remove: 2/0 grow/shrink: 4/2 up/down: 282/-114)          Total: 168 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-11-07 22:12:18 +01:00
Denys Vlasenko
4e1c8b4f6a hush: factor out %jobspec parsing
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-11-07 20:06:40 +01:00
Denys Vlasenko
5d5a611df2 hush: comment fix
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-11-07 19:36:50 +01:00
Denys Vlasenko
4224647c8d hush: do not allow sh -c '{ echo boo }'
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-11-07 16:22:35 +01:00
Aaro Koskinen
46443a383c cpio: add ownership (-R) test cases
Add ownership (-R) test cases.

Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-11-04 22:32:46 +01:00
Denys Vlasenko
aeaee43d5a hush: case logic for setting $? was still wrong
Resetting to 0 should happen in "esac". Matched branch must
still see previous $?.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-11-04 20:14:04 +01:00
Denys Vlasenko
30bfcf612b hush: non-matching "case" statement sets $? to 0
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-11-04 18:52:48 +01:00
Denys Vlasenko
672a55e606 hush: allow { cmd } to not be terminated by semicolon in some cases
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-11-04 18:46:14 +01:00
Denys Vlasenko
06b114900f ash: fix "duplicate local" code (forgot to re-enable interrupts)
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-11-04 16:43:18 +01:00
Denys Vlasenko
834aba3b72 comment and readme updates
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-11-04 14:13:58 +01:00
Denys Vlasenko
79e2598c48 su: expand help; simplify passing of -c CMD to run_shell()
Also, added a comment about bug 9401 (TIOCSTI input injection).

function                                             old     new   delta
packed_usage                                       30909   30932     +23
su_main                                              470     487     +17
sulogin_main                                         260     258      -2
run_applet_and_exit                                  681     678      -3
run_shell                                            166     126     -40

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-11-03 22:13:08 +01:00
Denys Vlasenko
2b288236e8 loadfont: 32k size limit is not enough
Since our "read to malloced buf" routines only gradually grow
allocations, let's be generous here and allow 128k.

Reported by Alex Henrie <alexhenrie24@gmail.com>

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-11-03 20:57:37 +01:00
Denys Vlasenko
1ab7c2fc6d ash: while (!got_sig) pause() is not reliable, use sigsuspend()
dash was doing it for a reason. Unfortunately, it had no comment why...
now I know.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-11-03 20:22:54 +01:00
Denys Vlasenko
2e6af54971 man: remove -Tascii from nroff invocation
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-10-31 14:05:34 +01:00
Denys Vlasenko
7c3c92c533 man: make width selection more thorough; explain how to override it
Fedora's "man CMD >file" still uses terminal width, not 80 (but disables formatting),
this change mimics that.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-10-31 01:52:18 +01:00
Denys Vlasenko
a92a74961d man: allow nroff and tbl commands be overridden; unmangle writing to files
Parse this in config files:
	 DEFINE col ...
	 DEFINE tbl ...
	 DEFINE nroff ...
Add width options to nroff command line.
Use "tbl", not "gtbl", as default tbl command.
Export GROFF_NO_SGR=1 and use "col -b -p -x" instead of pager when writing to file.

function                                             old     new   delta
man_main                                             735     863    +128
if_redefined                                           -      64     +64
show_manpage                                         199     169     -30
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 1/1 up/down: 192/-30)           Total: 162 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-10-30 22:31:30 +01:00
Denys Vlasenko
d4f3db9427 ash: if using libc glob(), skip it if no metachars are in word
This saves making tons of pointless stat() calls

function                                             old     new   delta
expandarg                                            888     921     +33

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-10-30 18:41:01 +01:00
Denys Vlasenko
474ed06c39 ash: fix bit-rotten debug infrastructure
DEBUG = 2 output was a bit messed up

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-10-30 18:30:29 +01:00
Denys Vlasenko
493b9cae80 ash: make popfile() anfter popallfiles() safe
In this example:

	ash -c 'readonly x; echo $(command eval x=2)'

evalstring() is called after forkchild(), which calls popallfiles().
On exception, evalstring() will popfile().

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-10-30 18:27:14 +01:00
Denys Vlasenko
9db74e49e5 hush: fix "(sleep 1; exit 3) & sleep 2; echo $?; wait $!; echo $?"
"wait $!" may be just a bit too late: backgrounded $! is gone.
Do not bomb out in this case.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-10-28 22:39:12 +02:00
Denys Vlasenko
7e6753609d hush: fix "wait PID"
It was not properly interruptible, and did not update job status
(the exited processes were still thought of as running).

function                                             old     new   delta
process_wait_result                                    -     453    +453
wait_for_child_or_signal                               -     199    +199
run_list                                             996    1002      +6
checkjobs_and_fg_shell                                41      43      +2
builtin_wait                                         328     215    -113
checkjobs                                            516     142    -374
------------------------------------------------------------------------------
(add/remove: 2/0 grow/shrink: 2/2 up/down: 660/-487)          Total: 173 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-10-28 21:59:09 +02:00
Denys Vlasenko
8f7b0248ad ash: use pause(), not sigsuspend(), in wait builtin
Same effect, smaller code

function                                             old     new   delta
dowait                                               463     374     -89

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-10-28 17:16:11 +02:00
Denys Vlasenko
d81e9f5093 ash: fix interactive "command eval STRING" exiting on errors.
This bug is also present in current dash

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-10-28 15:43:50 +02:00
Denys Vlasenko
458c1f218b ash: [JOBS] Fix dowait signal race
Upstream commit:

    Date: Sun, 22 Feb 2009 18:10:01 +0800
    [JOBS] Fix dowait signal race

    This test program by Alexey Gladkov can cause dash to enter an
    infinite loop in waitcmd.

    #!/bin/dash
    trap "echo TRAP" USR1
    stub() {
        echo ">>> STUB $1" >&2
        sleep $1
        echo "<<< STUB $1" >&2
        kill -USR1 $$
    }
    stub 3 &
    stub 2 &
    until { echo "###"; wait; } do
    echo "*** $?"
    done

    The problem is that if we get a signal after the wait3 system
    call has returned but before we get to INTON in dowait, then
    we can jump back up to the top and lose the exit status.  So
    if we then wait for the job that has just exited, then it'll
    stay there forever.

    I made the original change that caused this bug to fix pretty
    much the same bug but in the opposite direction.  That is, if
    we get a signal after we enter wait3 but before we hit the kernel
    then it too can cause the wait to go on forever (assuming the
    child doesn't exit).

    In fact this is pretty much exactly the scenario that you'll
    find in glibc's documentation on pause().  The solution is given
    there too, in the form of sigsuspend, which is the only way to
    do the check and wait atomically.

    So this patch fixes Alexey's race without reintroducing the old
    bug by converting the blocking wait3 to a sigsuspend.

    In order to do this we need to set a signal handler for SIGCHLD,
    so the code has been modified to always do that.

    Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

I failed to reproduce the bug (it requires precise timing), but it seems real.

function                                             old     new   delta
dowait                                               284     463    +179
setsignal                                            301     326     +25
signal_handler                                        59      76     +17
ash_main                                            1481    1487      +6
localcmd                                             350     348      -2
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 4/1 up/down: 227/-2)            Total: 225 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-10-27 23:51:19 +02:00
Denys Vlasenko
c0663c7cd2 ash: [SIGNAL] Remove EXSIG
Upstream commit 1:

    Date: Sun, 22 Feb 2009 18:16:13 +0800
    [SIGNAL] Remove EXSIG

    Now that waitcmd no longer uses EXSIG we can remove it.

    Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Upstream commit 2:

    Date: Thu, 2 Oct 2014 21:07:55 +0800
    [ERROR] Set exitstatus in onint

    Currently the exit status when we receive SIGINT is set in evalcommand
    which means that it doesn't always get set.  For example, if you press
    CTRL-C at the prompt of an interactive dash, the exit status is not
    set to 130 as it is in many other Bourne shells.

    This patch fixes this by moving the setting of the exit status into
    onint which also simplifies evalcommand.

    Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Upstream commit 3:

    Date: Fri, 3 Oct 2014 14:07:07 +0800
    [EVAL] Do not clobber exitstatus in evalcommand

    All originators of EXERROR have been setting the exitstatus for
    a while now.  So it is no longer appropriate to set it explicitly
    in evalcommand.

    In fact doing so may cause the original exitstatus to be lost.

    Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Last three coomits:
function                                             old     new   delta
waitcmd                                              186     224     +38
dowait                                               276     284      +8
waitforjob                                           104     107      +3
localcmd                                             348     350      +2
showjobs                                              64      61      -3
forkshell                                            263     260      -3
raise_interrupt                                       93      67     -26
blocking_wait_with_raise_on_sig                       40       -     -40
evalcommand                                         1264    1208     -56
evaltree                                             809     498    -311

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-10-27 21:13:49 +02:00
Denys Vlasenko
6918811014 ash: open-code blocking_dowait_with_raise_on_sig()
There is in fact only one callsite.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-10-27 21:13:24 +02:00