Commit Graph

1705 Commits

Author SHA1 Message Date
Jim Warner
bc616b3615 library: correct a flawed approach for PROCPS_FILL_UID
Gosh, just because nobody uses some newlib provision I
guess, since it is being offered, it ought to actually
be tested at some point. Well, that point just arrived
and guess what? A surprise: some bugs were discovered.

The procps_pids_select function established a for loop
wherein readproc is called until the passed 'maxthese'
limit. Unfortunately this was incorrect for 2 reasons:

1. For PROCPS_FILL_PID results are limited by what the
oldlib finds, having established the pid list at open.
Total found already cannot exceed a passed 'maxthese';

2. With PROCPS_FILL_UID, returned results could exceed
a 'maxthese' thus making the for loop incorrect again.

[ plus yours truly neglected to forward the required ]
[ UIDs total to our old library, another oops biggie ]

In summary: the loop should have been forever, exiting
only when all those identified procs had been located.

So, while addressing those bugs, I've consolidated all
the retrieval code (initialize, iterate, summarize) in
a single helper function which will now serve both the
procps_pids_reap and select functions. And as a result
those guys were reduced to quite trivial housekeeping.

This patch, hopefully, completes the normalization for
reap/select (fill), which began with references shown.

Reference(s):
commit 0c953eccc5
commit 747dfc5987

Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-10-09 21:35:04 +11:00
Jim Warner
99a657b365 ps: miscellaneous accumulated changes to comments only
With the conversion to the new <pids> interface, a few
comments (only) are being adjusted, as detailed below.

. Escapes '\' crept into some comments containing '|'.

. For consistency, add '.' dot qualifier to a comment.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-10-09 21:33:51 +11:00
Jim Warner
0354fc1c8f library: miscellaneous minor accumulated <pids> tweaks
This patch contains the following minor modifications:

. When assigning to boot_seconds from a double, a cast
to 'unsigned long' was employed that in reality should
have been 'unsigned long long'. But, on second thought
it's probably best if the compiler makes the decision.

. Results for ID_TGID do not require an 'f_status' flg
since both tid and tgid will be available by virtue of
the 'simple_nextpid' function normal operations. Thus,
that flag has been removed from the <pids> Item_table.

. When the pids_stacks structure was eliminated with a
change to the alloc/dealloc functions in the reference
below, several casts became redundant and are removed.

Reference(s):
commit 747dfc5987.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-10-09 21:33:14 +11:00
Jim Warner
584028dbe5 ps: exploit those new <pids> task/threads capabilities
This commit represents the ps transition to the <pids>
'stacks' interface. While an effort to minimize impact
on existing code was made (as with a disguised proc_t)
the changes were still extensive. Along the way, a few
modifications beyond simply conversion were also made.

------------------------------------------------------
Here's a brief overview the design of this conversion:

. The need to satisfy relative enum requirements could
not easily have been made table driven since any entry
in the format_array might require several <pids> items
in support. So I decided to allow every print function
to contribute its own relative enums once the decision
as to exactly what will be printed had been finalized.

. A similar approach was taken for sorting, since it's
possible to have sort keys that will not be displayed.
Here, I relied on the existing print extensions above.

. In summary, just prior to printing ps walks thru two
lists one time (the format_list & sort_list) and calls
each print function. That function does not print, but
sets its required enum if necessary. Later, when those
same functions are called repeatedly for every printed
line, the only overhead will be an if test and branch.

------------------------------------------------------
Below is a summary of major changes beyond conversion:

. Sorts are now the responsibility of the library. And
therefore the total # of sortable fields substantially
increased without effort. Additionally, several quirky
fields remain as sortable, even though they can't ever
be printed(?). Surely that must make sense to someone.

[ while on this subject of sort, please do *not* try ]
[ to sort old ps on 'args'. or better yet, if you do ]
[ try that sort, see if you can determine his order, ]
[ without peeking at the source. that one hurts yet! ]

. All logic dealing with the old openproc flags and ps
struct members known as 'need' have been whacked since
that entire area was solely the new library's concern.

. Remaining malloc/calloc calls to stdlib were changed
to xmalloc/xcalloc from our own include/xalloc.h file.
None of the replaced calls ever checked return values.

[ be aware that 2 minor potential memory leaks exist ]
[ depending on command line arguments. no attempt is ]
[ made to free dynamically acquired format/sort node ]
[ structures upon return; a conscious design choice. ]

Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-10-05 21:52:08 +11:00
Jim Warner
468c15caa6 top: adapt for normailzed <pids> select/fill interface
Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-10-05 21:50:23 +11:00
Jim Warner
a7153fe49f pmap: adapt to normailzed <pids> select/fill interface
Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-10-05 21:50:01 +11:00
Jim Warner
747dfc5987 library: privatize two with <pids> select/fill changes
After simplifying that select/fill interface, there is
no longer a need for public 'alloc' & 'dealloc' stacks
functions. There is now only one instance of stacks as
an input parameter found in procps_pids_stacks_sort().
But sorting 'empty' stacks serves no possible purpose.

So this commit retains both functions, since they will
still be needed, but designates them private (static).

Additionally, with their demise we will eliminate that
pids_stacks structure from the header file, internally
using what always was the true 'stacks_extent' struct.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-10-05 21:48:45 +11:00
Jim Warner
0c953eccc5 library: normalize the <pids> fill/selection interface
After wrestling with the conversion of both top and ps
the differences between reap (all) & fill (select) has
become increasingly inconvenient. So this patch simply
normalizes that API making returned results identical.

The former procps_pids_stacks_fill identifier will now
be known as procps_pids_select which serves as logical
counterpart to the existing procps_pids_reap function.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-10-05 21:47:50 +11:00
Jim Warner
30997b967a library: add <pids> TIME_ALL/TIME_ELAPSED needed by ps
Shoot, here's yet another bow to ps needs. But it's ok
because it makes a lot of sense. Rather than force all
users into their own calculations do but it once here.

As an aside this need arose during ps testing when the
sorts were using TIME_START or TICS_ALL. That was just
fine for almost every need except 'etime' plus 'time'.

That 'etime' was sorting the opposite of what's wanted
when using TIME_START (of course) while 'time' yielded
some weird ordering because TICS_ALL was too granular.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-10-05 21:42:07 +11:00
Jim Warner
042cfa71e7 library: add abbreviated TTY_NUMBER to that <pids> API
While not documented in the man page, ps allows 'tty4'
as a valid output specifier complimenting 'tty8' & its
derivatives. So, in order to eliminate a dev_to_name()
call in the ps program the library will now offer this
abbreviated tty version (consisting of a number only).

Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-10-05 21:39:37 +11:00
Jim Warner
d66000588a library: the <pids> API now supports 'extra' enum sort
The 'PROCPS_PIDS_extra' enumerator already enjoys some
special place wherein it's zeroed with each iteration.

This patch simply extends the special handling to also
include support for sorting. It will be treated as the
'ull_int' data type, since that encompasses the entire
scope of that union within all pids_result structures.

[ plus, we've also corrected the actual 'extra' name ]

This change was prompted by the conversion of ps which
needs that enumerator to store the former 'pcpu' data,
so it will be available for sorting (not for display).

Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-10-05 21:37:08 +11:00
Jim Warner
27283bbc6f library: strengthen <pids> sort order parameter checks
The way that the passed sort order was validated would
allow the invalid 0 to fall between the sofa cushions.
So this patch will simply close that former oversight.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-10-05 21:32:54 +11:00
Jim Warner
683b3fd4f2 top: streamline the approach to tracking relative enum
Two separate entries under the Fieldstab were employed
to manage 'relative' enumerators under that new <pids>
interface. However, just a single entry could actually
serve both needs with a negative 'not selected' value.

So this commit just borrows the approach used with the
ps conversion where -1 is now representing unselected.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-10-05 21:30:53 +11:00
Jim Warner
f7fcb33652 top: eliminate an unused error message and its support
This commit just eliminates an error message no longer
needed under that newlib <pids> interface. Plus, a few
enumerators in the header weren't in alphabetic order.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-10-05 21:28:39 +11:00
Jim Warner
a5051b7ef3 pgrep: a few tweaks to the <pids> interface conversion
Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-10-05 20:30:40 +11:00
Craig Small
2af3617b8d pgrep:Remove the a?b:c for threads or no threads 2015-09-26 14:47:56 +10:00
Craig Small
5321868929 library: Removed unused methods.
As part of the push to remove the old API, 3 more old calls were
deleted from the library. Now all someone needs to do is fix ps
and we're largely done.
2015-09-26 14:39:37 +10:00
Craig Small
a8c0627415 pidof: remove unrequired includes
pidof was including readproc.h only because one length was used
and it didn't include some system headers.
2015-09-26 14:37:38 +10:00
Craig Small
492a2c64db pgrep: remove commented old code
pgrep had old API code commented out, its now removed.
2015-09-26 14:34:51 +10:00
Craig Small
0a0e4c603e skill: use library for process scanning
skill is one of the older and more unloved programs. It was still
scanning readdir /proc. It now will use the procps library like the
rest of the programs.

Signed-off-by: Craig Small <csmall@enc.com.au>
2015-09-26 14:32:56 +10:00
Craig Small
1b6e5ae11e build-sys: unlink kill from procps
kill doesn't use any symbols from libprocps so we don't need to
link to it.
2015-09-26 09:19:28 +10:00
Craig Small
f65121ef74 kill: split out from skill/snice
The first part of fixing skill/snice to use the library instead
of directly readdir()ing /proc which is what it does now.

Remove the kill code from the skill/snice code and put common
elements into lib/signals.c Not 100% sure that is the right
destination instead of a new lib file, but ok for now.

kill shares some parsing logic with skill/snice but mainly
around signal specifications. The "do it" code is very different.

Signed-off-by: Craig Small <csmall@enc.com.au>
2015-09-26 09:13:13 +10:00
Craig Small
f37e5eec96 pgrep: use tty_name
pgrep used to extract tty and then convert to a name. As the library
does this for you now there is no need for the double step.
2015-09-26 08:31:06 +10:00
Craig Small
b5e3c5e835 pgrep: Use new library API
Change pgrep to use new library API. Threads now use their own
name instead of parent process.  Updated man page to make note
of it.
2015-09-26 08:19:32 +10:00
Jim Warner
86b155b83f library: make the pids_sort_order enums more intuitive
The values of PROCPS_SORT_ASCEND & PROCPS_SORT_DESCEND
were a tad unintuitive. This patch will just make them
a more natural +1 for ascending and -1 for descending.

[ plus it still allows that fast path multiplication ]
[ instead of a comparison for signed numbers/strings ]

Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-09-21 22:39:40 +10:00
Jim Warner
872be3a3a2 top: trade 'look_up_our_self' for a new API equivalent
With the advent of the 'fatal_proc_unmounted' function
in the <pids.h> API to ensure the /proc filesystem was
mounted, we will finally get rid of the last remaining
vestiges of the former libprocps <readproc> interface.

[ also play a little catch up and whack some headers ]
[ that are not necessary now, beyond that readproc.h ]

Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-09-21 22:39:10 +10:00
Jim Warner
007e032805 library: introduce a fatal 'proc not mounted' function
Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-09-21 22:38:38 +10:00
Jim Warner
42af8ffbc1 library: enable an 'invariant' stack for that pids API
After peeking at possible conversion of the ps program
it appeared that we may ultimately need the concept of
a 'static' pids_stack in suport of look_up_our_self().
In other words, one not impacted by procps_pids_reset.

This patch simply sets the stage for that possibility.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-09-21 22:37:40 +10:00
Jim Warner
80f1a05b78 library: abandon long/long long distinction with KLONG
With this patch the distinction between a 'long' KLONG
and a 'long long' KLONG is being abandoned in favor of
a consistent declaration as 'long' only. Plus we would
have also defined it as 'unsigned' except there exists
much code already explicitly specifying the qualifier.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-09-21 22:37:02 +10:00
Jim Warner
987f4f2e3e pmap: adapt to changes in <pids> API regarding address
This commit was prompted by that change from 'addr' to
'ul_int' in the <pids> interface. Along the way, KLONG
was removed as having long ago outlived its usefulness
as performance optimizations for weird configurations.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-09-21 22:36:36 +10:00
Jim Warner
f0e447cc66 library: exchange <pids> 'addr' for that 'ul_int' type
Work on converting ps has revealed the desirability of
trading a void pointer for that ul_int type. There was
much arithmetic employed against such values and casts
would otherwise have been required. Even pmap needed a
cast on occasions when comparing an internal variable.

Besides, there is much to be said for reducing demands
on (and the complexity of) the result structure union.

[ we choose ul_int over ull_int since that former is ]
[ the exact same size and capacity as a void pointer ]
[ regardless of whether compiled as 32-bit or 64-bit ]

Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-09-21 22:36:05 +10:00
Jim Warner
105c69164b top: update the man document reporting bugs suggestion
Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-09-21 22:35:23 +10:00
Jim Warner
836c134579 library: with valgrind help, fix faulty meminfo assign
Not sure how this one has gone unnoticed until now but
with valgrind's help it's going bye-bye lickety-split.

Reference(s):
==26533== Conditional jump or move depends on uninitialised value(s)
==26533==    at 0x4E4082B: procps_meminfo_stack_fill (meminfo.c:408)

Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-09-21 22:35:05 +10:00
Jim Warner
88daa89883 miscellaneous: silence a whole bunch of clang warnings
[ but most definitely not all of them by a long shot ]

Reference(s):
proc/diskstat.c:186:17: warning: unused variable 'is_disk' [-Wunused-variable]
    int retval, is_disk;
                ^
proc/namespace.c:110:1: warning: control may reach end of non-void function [-Wreturn-type]
}
^
proc/readproc.c:1131:50: warning: address of array 'ent->d_name' will always evaluate to 'true' [-Wpointer-bo
    if(unlikely(unlikely(!ent) || unlikely(!ent->d_name))) return 0;
                                           ~~~~~~^~~~~~
proc/readproc.c:1158:50: warning: address of array 'ent->d_name' will always evaluate to 'true' [-Wpointer-bo
    if(unlikely(unlikely(!ent) || unlikely(!ent->d_name))) return 0;
                                           ~~~~~~^~~~~~
proc/sysinfo.c:45:12: warning: unused variable 'stat_fd' [-Wunused-variable]
static int stat_fd = -1;
           ^
proc/sysinfo.c:49:12: warning: unused variable 'meminfo_fd' [-Wunused-variable]
static int meminfo_fd = -1;
           ^
proc/sysinfo.c:51:12: warning: unused variable 'vminfo_fd' [-Wunused-variable]
static int vminfo_fd = -1;
           ^
proc/sysinfo.c:53:12: warning: unused variable 'vm_min_free_fd' [-Wunused-variable]
static int vm_min_free_fd = -1;
           ^
proc/uptime.c:157:12: warning: unused variable 'realseconds' [-Wunused-variable]
    time_t realseconds;
           ^
proc/uptime.c:158:16: warning: unused variable 'realtime' [-Wunused-variable]
    struct tm *realtime;
               ^
vmstat.c:574:20: warning: format specifies type 'unsigned int' but the argument has type 'unsigned long' [-Wformat]
                   DSTAT(PROCPS_DISKSTAT_READ_TIME),
                   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
vmstat.c:578:20: warning: format specifies type 'unsigned int' but the argument has type 'unsigned long' [-Wformat]
                   DSTAT(PROCPS_DISKSTAT_WRITE_TIME),
                   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
watch.c:230:7: warning: variable 'endptr' is uninitialized when used here [-Wuninitialized]
        if (*endptr == '\0') set_ansi_attribute(0); /* [m treated as [0m */
             ^~~~~~

Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-09-21 22:34:27 +10:00
Jim Warner
a6b50e59ef miscellaneous: cleanup accumulated trailing whitespace
Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-09-21 22:33:50 +10:00
Jim Warner
efcbbe93ea top: plug a rather big hole in the display fields dike
Whoa, guess what field got overlooked in that march to
the newlib conversion? It was the TTY guy. However, it
wasn't completely top's fault - that newlib must share
at least some responsibility, for only offering a num.

[ and while we're at it, let's touch up the man page ]
[ to agree with ol' newlib's current implementation. ]

Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-09-09 21:22:44 +10:00
Jim Warner
17d77f8016 library: add PROCPS_PIDS_TTY_NAME to compliment number
OK, ok, this was kind of a huge omission. So please do
not select the TTY field for display in top quite yet,
at least until a next patch has been pushed to GitLab.

And to produce a correct sort order for this new field
the GNU 'strverscmp' routine was a necessary addition.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-09-09 21:22:43 +10:00
Craig Small
617a4d0f70 library: Add space after days for uptime
Uptime output for both w and uptime command were showing no
comma or space after days.

$ ./uptime
 18:32:21 up 22 days7 min,  6 users,  load average: 0.23, 0.46, 0.64

Minor tweak to fix this.
2015-09-07 18:38:39 +10:00
Jim Warner
4c31bb49e5 w: correct program help & man page regarding arguments
This commit is an outgrowth of the research into a bug
involving the recently added enum 'PROCPS_PIDS_extra'.

Since this program is not equipped to filter more than
one user, the help text and man document were updated.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-09-07 18:11:48 +10:00
Jim Warner
14359a0afe w: eliminate inappropriate cmdline padding with spaces
This commit is an outgrowth of the research into a bug
involving the recently added enum 'PROCPS_PIDS_extra'.

The WHAT portion of output is being padded with spaces
since the printf field width format specifier was used
in combination with a precision specifier. This commit
reduces the format string to just that precision part.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-09-07 18:11:48 +10:00
Jim Warner
5e46a145ba library: ensure any 'flags' is consistently 'unsigned'
This commit is an outgrowth of the research into a bug
that recently surfaced with the 'w' program. And while
that program was just a victim several inconsistencies
were found in the handling of library flags during the
research. This patch just address such irregularities.

Reference(s):
http://www.freelists.org/post/procps/newlib-at-the-precipice,4

Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-09-07 18:11:48 +10:00
Jim Warner
c39f4735c0 library: swat (now) obvious bug from PROCPS_PIDS_extra
I can't remember during what sleepy hour that enum was
added to pids.h, but it damn sure fell short of a full
implementation by approximately 1,000,000 miles or so.

Strangely it surfaced on Craig's system seemingly ggdb
related whereas on mine, a segmentation fault was only
seen when that -h (no header) argument was being used.

Oh well, the road to its resolution also offered us an
opportunity to cleanup some other items along the way.

Reference(s):
http://www.freelists.org/post/procps/newlib-at-the-precipice,4

Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-09-07 18:11:48 +10:00
Jim Warner
34395be330 library: suppress zero 'days' under the <uptime.h> API
The former whattime logic used to suppress that 'days'
output when the system had been up less than 24 hours.

But since the refactor for newlib, '0 days' was always
output under those conditions. So this commit restores
the former expected behavior of suppressing that item.

[ plus an erroneous calculation of uphours was fixed ]

[ and the clang warnings shown below were also fixed ]

Reference(s):
proc/uptime.c:74:10: warning: unused variable 'buf' [-Wunused-variable]
    char buf[256];
         ^
proc/uptime.c:131:58: warning: data argument not used by format string [-Wformat-extra-args]
        pos += sprintf(upbuf + pos, "%d min, ", uphours, upminutes);
                                    ~~~~~~~~~~           ^
proc/uptime.c:175:15: warning: expression result unused [-Wunused-value]
        comma +1;
        ~~~~~ ^~

Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-09-06 21:59:17 +10:00
Jim Warner
bb04019510 top: utilize a library result struct for 'forest view'
When top was originally adapted to use that <pids> API,
the forest view support was redesigned since the proc_t
pad_3 byte could no longer be employed to hold a task's
nesting level. The redesign required additional arrays.

Now that the dust is settling on those initial efforts,
that PROCPS_PIDS_noop item was used as a substitute for
the old pad_3 along with a return to the former design.
But, while it proved adequate, the invariant nature for
that item required of top an extra initialization step.

So the library was coaxed into adding one more pid_item
(PROCPS_PIDS_extra) which will, unlike that 'noop' guy,
be reset with each reap. Everybody should be happy now.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-09-06 21:58:27 +10:00
Jim Warner
07ec0b4e09 library: extend 'noop' concept to a resettable 'extra'
The presence of that PROCPS_PIDS_noop may yet see some
use in the future with its 'no alter' library promise.

However, when top used that item to reflect the forest
view nesting level, the unchanging nature of that item
became more of an inconvenience than benefit. For each
refresh top was forced to loop through all the stacks,
resetting that PROCPS_PIDS_noop result struct to zero.

So this commit will now offer users a choice between a
new re-initialized item (PROCPS_PIDS_extra) & the noop
invariant.  Since the library already resets all those
result structures, top will now utilize it at no cost.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-09-06 21:57:49 +10:00
Jim Warner
b2853ed117 top: do not co-mingle strings/numbers under namespaces
Craig's recent commit under that newlib branch dealing
with namespace support has prompted me to review top's
handling of those fields. Currently, when such a field
is zero, top displays a dash ('-'). This will mean the
justification toggles ('j/J') will behave incorrectly.

This patch simply allows the potential zero to display
or be suppressed with the already existing '0' toggle.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-09-06 21:57:09 +10:00
Craig Small
1bfc9235b4 Grab the CI file from master 2015-09-03 22:55:36 +10:00
Jim Warner
f1bd82ff07 top: still more tidying up after <pids> implementation
A patch containing the following miscellaneous tweaks:

. remove a function that handled former library errors
[ that function should have gone bye-bye with 3.3.11 ]
[ when those 'wchan' provisions were much simplified ]

. make clearer a distinction between 'new' and 'reset'
[ use PROCPS_PIDS_noop when procps_pids_new() called ]
[ since at that point we are only establishing depth ]

Reference(s):
http://www.freelists.org/post/procps/newlib-for-pgrep,1

Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-09-03 22:37:54 +10:00
Jim Warner
1b38b751ff library: more miscellaneous pids implementation tweaks
A patch containing the following miscellaneous tweaks:

. make a supposedly robust parameter test truly robust
[ ensure the largest enum value used with validation ]

. remove duplicate item test in cleanup_stack function
[ is already subordinate to test of PROCPS_PIDS_noop ]

Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-09-03 22:37:50 +10:00
Craig Small
a61f78d6e0 library: rework namespace calls
Functions related to namespaces were half-in half-out of the
procps library and didn't fit the standard naming scheme.

While struct { long ns[x]} is a bit clunky, its the only way
to "lock in" x. The alternative is to use ns_* variables.

This work was needed before pgrep could be converted.
2015-09-03 22:32:19 +10:00