Commit Graph

82 Commits

Author SHA1 Message Date
Jim Warner
7418b97344 sysctl: eliminate a warning '-Wmisleading-indentation'
[ and in the affected function, we'll also eliminate ]
[ all those f**king tab characters making a hot mess ]
[ of any attempt at a properly formatted C function! ]

[ plus i adjusted a little non-tab misalignment too! ]

Signed-off-by: Jim Warner <james.warner@comcast.net>
2022-01-13 19:34:39 +11:00
Jim Warner
4b4dfd57aa sysctl: eliminate a warning of '-Wmaybe-uninitialized'
Signed-off-by: Jim Warner <james.warner@comcast.net>
2022-01-07 19:19:15 +11:00
Jim Warner
2f00186730 sysctl: eliminate some warnings of '-Wunused-function'
Signed-off-by: Jim Warner <james.warner@comcast.net>
2022-01-07 19:19:15 +11:00
Jim Warner
4985a11f00 sysctl: eliminate some warnings of '-Wunused-variable'
Signed-off-by: Jim Warner <james.warner@comcast.net>
2022-01-07 19:19:15 +11:00
Jan Rybar
08aa15ce4b sysctl: Return non-zero if param setting failed
Real usecase:
'sysctl -w user.max_uts_namespaces=2147483648; echo $?'
returns 0 even though it failed with EINVAL

The close_stream() realised there was an issue and printed an
error but didn't change the return value.

Slightly modified merge request.

References:
 procps-ng/procps!76

Signed-off-by: Craig Small <csmall@dropbear.xyz>
2021-09-15 21:07:43 +10:00
Craig Small
2a7c909a1b sysctl: Update previous patch for newlib
This change was cherry picked from old library branch but
missed the change to check the path.

References:
 commit 6389deca5b
2021-09-15 20:09:44 +10:00
Craig Small
6389deca5b sysctl: Support systemd glob patterns
systemd-sysctl handles glob patterns along with overrides and
exceptions. Now the procps sysctl does it too.

The return value for sysctl is consistently either 0 or 1.

Added tests to check sysctl functions.

References:
 procps-ng/procps#191

Signed-off-by: Craig Small <csmall@dropbear.xyz>
2021-09-15 20:07:32 +10:00
Craig Small
f25d462166 sysctl: Check path is under /proc/sys
sysctl would try to read/write any path you gave it either on
the command line or configuration file. It would append /proc/sys
on the path but not check for any sneaky path traversal with ../

This commit means it first resolves all paths using realpath(3)
and then checks the path starts with "/proc/sys/"

At first I thought this might be a non-issue, but perhaps someone
could put a file into the sysctl configuration path and.. do
something? Anyway its a 8-line fix and makes things more correct.

References:
 #179

Signed-off-by: Craig Small <csmall@dropbear.xyz>
2021-07-20 22:36:15 +10:00
Craig Small
5da3024e4e sysctl: config directory order
Matches the systemd directory order (/run is after /etc) and
document what directories are used better.
2020-02-27 21:56:13 +11:00
Craig Small
a6c0795d49 sysctl: ignore errors from lines starting with -
The systemd sysctl ignores errors from preload files that start
with a hyphen.  This change brings the procps sysctl into line with
their change.

References:
    procps-ng/procps#138
    https://github.com/systemd/systemd/pull/13191
    https://github.com/systemd/systemd/pull/13141
2019-09-21 15:53:45 +10:00
Patrick Steinhardt
866a27cdcd sysctl: do not report set key in case close_stream fails
As we're using buffered I/O when writing kernel parameters, write errors
may get delayed until we close the `FILE` stream. As we are currently
outputting the key that is to be set disregarding the return value of
`close_stream`, we may end up in a situation where we report error and
success:

    $ sysctl kernel.printk_ratelimit=100000000000000
    sysctl: setting key "kernel.printk_ratelimit": error code 22
    kernel.printk_ratelimit = 100000000000000

Fix the issue by only outputting the updated value in case
`close_stream` does not report an error.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
2019-03-04 21:55:24 +11:00
Jim Warner
583472be8b sysctl: fix typo in help __________________ (catch up)
--------------- Original Master Branch Commit Message:
Changed "a variables" to "the given variable(s)"

References:
 procps-ng/procps#84

Signed-off-by: Jim Warner <james.warner@comcast.net>
2018-05-06 07:19:38 +10:00
Jim Warner
c2a29d370c sysctl: relocate the procio code to a more proper home
Now that the procio logic was removed from the library
we must move the header file, lest we break make dist.

In the process, we will relocate that source file too.

[ we'll take a slightly different approach than that ]
[ used under the master branch by exploiting those 2 ]
[ non-library directories 'include' and 'lib', while ]
[ avoiding any sysctl hard coded function prototype. ]

Signed-off-by: Jim Warner <james.warner@comcast.net>
2018-05-06 07:19:37 +10:00
Werner Fink
20ce03e08c Use new standard I/O for reading/writing sysctl values
thereby use one allocated buffer for I/O which now might
be increased by the stdio function getline(3) on the
file if required.

Signed-off-by: Werner Fink <werner@suse.de>
2018-03-01 21:43:11 +11:00
Werner Fink
1ca49b93d2 Preload sysctl lines even if longer than stdio buffer
by using getline(3) to use a dynamically increased buffer
if required by the input found in sysctl configuration files.

Signed-off-by: Werner Fink <werner@suse.de>
2018-03-01 21:39:46 +11:00
Craig Small
8882afa047 sysctl: Don't crash file fopen fails
The commit referenced below put a setvbuf() before checking what
fopen() returned. If the file could not be opened then the file
handle was NULL at setvbuf() crashed.

setvbuf() is now called after checking what fopen() returns and only
when it was successful.

References:
 procps-ng/procps#76
 commit 58ae084c27
2018-01-07 12:31:37 +11:00
Theodore Dubois
2e302406f7 Allow empty string for value 2017-12-29 15:39:44 +11:00
Werner Fink
c22fc57276 Avoid confusing messages caused by EIO on reading
/proc/sys/net/ipv6/conf/*/stable_secret if those are not set yet.

Signed-off-by: Werner Fink <werner@suse.de>
2017-08-20 09:22:58 +10:00
Werner Fink
8af3db9274 Increase standard I/O buffer a lot to be able to
read huge informations at once as otherwise all files below
/proc/sys, not using the seq_file API at the kernel side,
will return EOF on a second read.

Signed-off-by: Werner Fink <werner@suse.de>
2017-08-20 09:22:41 +10:00
Werner Fink
e04394ef24 sysctl: Print lines longer than 1024 chars
as well do not open /proc/sys files if only the names of the
system control names of the kernel parameters should be shown.
Avoid leaking tmpname in case of a pattern mismatch.

Signed-off-by: Werner Fink <werner@suse.de>
2017-05-22 22:34:29 +10:00
Yann E. MORIN
3927600e0f sysctl.c: use strchr() instead of index()
index() is a legacy function, which is no longer implemented by all C
libraries (example: uClibc). Instead, use the POSIX defined strchr()
function.

Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
2016-08-15 21:14:23 +10:00
Craig Small
471cf4cd36 Merge branch 'master' into newlib
Conflicts:
	pgrep.c
	proc/sysinfo.c
	ps/output.c
	skill.c
	top/top.c
	top/top.h
	w.c
2015-10-28 21:09:26 +11:00
Craig Small
0f44172a5e sysctl: Remove links to library
sysctl doesn't use any symbols from the libprocps library so
this  update removes those dependencies.
2015-09-01 20:57:56 +10:00
Victor Ananjevsky
2617d03a33 sysctl: Correct stat on /etc/sysctl.conf
sysctl --system fails when the file /etc/sysctl.conf doesn't
exists. This happens due to wrong check of stat(2) return code.

Reference:
  https://www.freelists.org/post/procps/sysctl

Signed-off-by: Craig Small <csmall@enc.com.au>
2015-06-26 23:03:11 +10:00
Jaromir Capik
cbd8cf7829 sysctl: finalizing the GLOB_* flags check
This commit properly resolves the merge conflict
caused by the following two commits:
fb6d4e6cb4
f8128568d6
2014-08-28 15:48:29 +02:00
Michael Forney
fb6d4e6cb4 Support libc's without GLOB_TILDE
GLOB_TILDE is a GNU extension and may not be present on all systems.

Note (jcapik): The original patch from Michael Forney didn't
apply cleanly due to my recent addition of the GLOB_BRACE flag
in the list of flags. I had to edit the patch to make it apply,
but that produces an inconsistent state. It's gonna be fixed
in the next commit.
2014-08-28 15:07:01 +02:00
Jaromir Capik
f8128568d6 sysctl: support expansion of csh style braces with -p
This commit adds the GLOB_BRACE flag in the glob flags.
That allows to expand the csh style braces {a,b} and
define multiple independent patterns for config file
locations.
2014-07-16 14:29:42 +02:00
Sami Farin
9c7e8b82f8 sysctl: increase max supported line length of the conf file
I ran into this limit with net.ipv4.ip_local_reserved_ports ,
sysctl complained about the line after the long line, further
slowing down my error hunting.

Due to fgets usage, increase buffer size to 4096 chars with
minimum amount of code changes.

Signed-off-by: Sami Farin <hvtaifwkbgefbaei@gmail.com>
2014-03-14 18:55:14 +01:00
Jaromir Capik
8622b582da sysctl: Fixing memory leaks in PreloadSystem() 2014-01-02 19:49:36 +01:00
Craig Small
7f6efed9bb sysctl --system loads default config file
Commit cdca71e945 fixed
the loading the sysctl.conf file, but had the logic
for checking the file exists reversed incorrectly.
2013-12-27 23:08:14 +11:00
Craig Small
6437aa08d4 Update options to single strings
To assist the translators, each option is a separate string.
This means if we add/change/delete an option the remaining ones
will just keep working and only the impacted option needs some
translation work on it.
2013-10-11 10:07:10 +11:00
Craig Small
cdca71e945 sysctl --system ignores missing /etc/sysctl.conf
sysctl --system would not correctly return the RC for files in
subdirectories and would insist on having /etc/sysctl.conf

This update makes two changes when using sysctl --system:
  - The RC status is ORed for each config file, meaning an error in
    any file is propated to the RC
  - If /etc/sysctl.conf doesn't exist we just don't load it

References:
  https://bbs.archlinux.org/viewtopic.php?id=170005
  http://www.freelists.org/post/procps/wrong-defaults-for-sysctl-on-arch-linux
2013-09-20 22:34:32 +10:00
Craig Small
293b668d5f Merge commit 'refs/merge-requests/10' of git://gitorious.org/procps/procps into merge-requests/10 2013-04-07 17:58:06 +10:00
Craig Small
c2707dc2d7 sysctl return value
Gilles brought up a warning message in sysctl.c
sysctl.c: In function 'main':
sysctl.c:767: warning: value computed is not used

The return value of Preload was not being applied correctly to ret
meaning sysctl would not return the correct value.

Reference: http://www.freelists.org/post/procps/procpsng-337,18

Signed-off-by: Craig Small <csmall@enc.com.au>
2013-04-07 09:30:59 +10:00
Rainer Müller
042776e04c configure: check for program_invocation_name
For portabiliy, check for program_invocation_name during configure and
define HAVE_PROGRAM_INVOCATION_NAME accordingly. Use of this symbol is
now enclosed with the appropriate #ifdef block.

The symbol program_invocation_name is only used for error message
handling using error(), so it's safe to omit this if it is not
available.
2013-03-20 16:32:06 +01:00
Sami Kerola
2c99a09e52 sysctl: fix compiler warnings
sysctl.c:293:5: warning: no previous declaration for 'is_deprecated' [-Wmissing-declarations]
sysctl.c:472:58: warning: declaration of 'pattern' shadows a global declaration [-Wshadow]
sysctl.c:67:14: warning: shadowed declaration is here [-Wshadow]
sysctl.c:650:7: warning: variable 'SwitchesAllowed' set but not used [-Wunused-but-set-variable]

Signed-off-by: Sami Kerola <kerolasa@iki.fi>
2012-11-06 22:30:01 +11:00
Sami Kerola
b2c08d1d41 sysctl: avoid crash when -p file has unexpected input
Commit e01765d30b added is_deprecated(), which
crashed when user had input without without /proc/sys/ subdirectory.  The below
should illustrate how exactly the bug got to be trickered.

$ cat ~/foo
cause = crash
$ ./sysctl -p ~/foo
Segmentation fault

Signed-off-by: Sami Kerola <kerolasa@iki.fi>
2012-05-07 09:01:10 +02:00
Mike Frysinger
e2987888e2 sysctl: restore old -p handling
The previous version of sysctl had the form:
	sysctl -p [file]
In other words, it required a space between the -p and the [file].
Omitting the space would lead to an error.

The new version though is the opposite:
	sysctl -p[file]
In other words, it requires there to not be a space.

Considering the old behavior has been around for a decade, and runtime
checking for this mismatch in behavior is silly, and supporting the old
syntax is trivial, add support for it.

When '-p regexp' is glob is used to make reqular expression to be
expanded to argument list, which also means that -p option will
allow multiple files being specified as input.

Signed-off-by: Sami Kerola <kerolasa@iki.fi>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2012-05-07 09:01:10 +02:00
Mike Frysinger
156dd0b5a3 sysctl: fix broken .conf suffix matching
There's an off-by-one error in the count (".conf" is 5 bytes, not 6),
and the logic is inverted for the strcmp return value -- we want to
skip the files when they *don't* end in .conf, not when they *do*.

Also fix the off-by-one len check.

Bug-Debian: http://bugs.debian.org/669128
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2012-05-07 09:00:38 +02:00
Mike Frysinger
dbefb4476a sysctl: use stdbool.h
The stdbool.h header is part of C99 and has been usable on systems for
more than a decade.  Let's drop these manual hacks.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2012-05-03 09:16:34 +02:00
Sami Kerola
bf47d16095 sysctl: simplify file close error checking
Signed-off-by: Sami Kerola <kerolasa@iki.fi>
2012-04-06 15:32:45 +02:00
Sami Kerola
52269d22f3 all: check stdout and stderr status at exit
If stream status is not checked at the end of execution below problem
would not report error, or non-zero exit code.  The uptime is just an
example same was true with all commands of the project.

$ uptime >&- ; echo $?
uptime: write error: Bad file descriptor
1
$ uptime >/dev/full ; echo $?
uptime: write error: No space left on device
1

Signed-off-by: Sami Kerola <kerolasa@iki.fi>
2012-03-23 15:57:53 +01:00
Jim Warner
18c08390da sysctl: fix argument parsing regression
Any key=value pair following the first one are dropped after
commit 81df8e2630, due to changing
from the while loop to using getopt.

Broken behavior:
  sysctl net.ipv6.conf.tun0.optimistic_dad net.ipv6.conf.tun0.mc_forwarding
  net.ipv6.conf.tun0.optimistic_dad = 0

Good behavior:
  sysctl net.ipv6.conf.tun0.optimistic_dad net.ipv6.conf.tun0.mc_forwarding
  net.ipv6.conf.tun0.optimistic_dad = 0
  net.ipv6.conf.tun0.mc_forwarding = 0

Reference: http://www.freelists.org/post/procps/BUG-Commit-81df8e2-allows-only-one-keyvalue-arg
Reported-By: Sven Ulland <sveniu@opera.com>
Signed-off-by: Jim Warner <james.warner@comcast.net>
Signed-off-by: Sami Kerola <kerolasa@iki.fi>
2012-03-08 08:40:02 +11:00
Sami Kerola
ce61089059 docs: clarification to license headers in files
Add license header to all files.  The summary of licensing is below,
taken from Craig Small's email which is referred in commit message
tail.

sysctl and pgrep are GPL 2+
The rest is LGPL 2.1+

Reference: http://www.freelists.org/post/procps/Incorrect-FSF-address-in-the-license-files,8
Bug-Redhat: https://bugzilla.redhat.com/show_bug.cgi?id=797962
CC: Craig Small <csmall@enc.com.au>
CC: Jaromir Capik <jcapik@redhat.com>
Signed-off-by: Sami Kerola <kerolasa@iki.fi>
2012-03-03 18:41:11 +11:00
Sami Kerola
f5e2277a2e sysctl: print new line explicitely
In some cases sysctl does not print new line after the last line.
This commit fixes that behavior.

Signed-off-by: Sami Kerola <kerolasa@iki.fi>
2012-03-03 18:40:58 +11:00
Sami Kerola
e01765d30b sysctl: deprecate parameters
According to arp(7) manual page base_reachable_time and retrans_time
are obsolete since kernel 2.6.12. Based on that the print all listing
will not show these two parameters, and attempt to set them will fail.

Reported-by: Alexandre Cavalcante Alencar <alexandre.alencar@gmail.com>
Bug-Debian: http://bugs.debian.org/599556
Reference: http://www.mail-archive.com/bk-commits-head@vger.kernel.org/msg03396.html
Reference: http://www.opensubscriber.com/message/linux-kernel@vger.kernel.org/7344177.html
Signed-off-by: Sami Kerola <kerolasa@iki.fi>
2012-02-14 11:22:15 +01:00
Sami Kerola
1689e769e6 sysctl: fix potential null derefence [smatch scan]
sysctl.c:560 PreloadSystem(29) error: potential null derefence 'cfgs'.

Signed-off-by: Sami Kerola <kerolasa@iki.fi>
2012-02-05 21:02:34 +01:00
Sami Kerola
8fe81caa42 sysctl: fix coding style
Signed-off-by: Sami Kerola <kerolasa@iki.fi>
2012-01-25 09:18:38 +01:00
Sami Kerola
79ceb30b5c ps: unify cases and remove trailing dots in messages
Strings with lower caps & no trailing dots have greater change to
have multiple occurences, meaning less effort for translators, than
strings with them.

Signed-off-by: Sami Kerola <kerolasa@iki.fi>
2012-01-15 20:52:58 +01:00
Craig Small
fb11e1fe0a Changed the err and warns to macros
err and warn are BSD format but they are not recommended by library
developers.  However their consiseness is useful!

The solution is to use some macros that create xerr etc which then
just map to the error() function.  The next problem is error() uses
program_invocation_name so we set this to program_invovation_short_name

This is a global set but seems to be the convention (or at least errors
are on the short name only) used everywhere else.
2012-01-03 18:48:43 +11:00