Commit Graph

5223 Commits

Author SHA1 Message Date
8cff4f5348 Code review for pg_dump's handling of ALTER INDEX ATTACH PARTITION.
Ensure the TOC entry is marked with the correct schema, so that its
name is as unique as the index's is.

Fix the dependencies: we want dependencies from this TOC entry to the
two indexes it depends on, and we don't care (at least not for this
purpose) what order the indexes are created in.  Also, add dependencies
on the indexes' underlying tables.  Those might seem pointless given
the index dependencies, but they are helpful to cue parallel restore
to avoid running the ATTACH PARTITION in parallel with other DDL on
the same tables.

Discussion: https://postgr.es/m/10817.1535494963@sss.pgh.pa.us
2018-08-28 19:33:04 -04:00
3e2ceb231e pg_verify_checksums: Message style improvements and NLS support
The source code was already set up for NLS support, so just a nls.mk
file needed to be added.  Also, fix the old problem of putting the int64
format specifier right into the string, which breaks NLS.
2018-08-28 11:49:11 +02:00
cbdca00bef Fix missing dependency for pg_dump's ENABLE ROW LEVEL SECURITY items.
The archive should show a dependency on the item's table, but it failed
to include one.  This could cause failures in parallel restore due to
emitting ALTER TABLE ... ENABLE ROW LEVEL SECURITY before restoring
the table's data.  In practice the odds of a problem seem low, since
you would typically need to have set FORCE ROW LEVEL SECURITY as well,
and you'd also need a very high --jobs count to have any chance of this
happening.  That probably explains the lack of field reports.

Still, it's a bug, so back-patch to 9.5 where RLS was introduced.

Discussion: https://postgr.es/m/19784.1535390902@sss.pgh.pa.us
2018-08-27 15:11:12 -04:00
2d41d914ab Copy-editing of pg_verify_checksums help and ref page
Reformat synopsis, put options into better order, make the desciption
line a bit shorter, and put more details into the description.
2018-08-23 20:32:56 +02:00
d12782898e Change PROCEDURE to FUNCTION in CREATE OPERATOR syntax
Since procedures are now a different thing from functions, change the
CREATE OPERATOR syntax to use FUNCTION in the clause that specifies the
function.  PROCEDURE is still accepted for compatibility.

Reported-by: Peter Geoghegan <pg@bowt.ie>
Reviewed-by: Jonathan S. Katz <jonathan.katz@excoventures.com>
2018-08-22 14:44:49 +02:00
b19495772e doc: Update uses of the word "procedure"
Historically, the term procedure was used as a synonym for function in
Postgres/PostgreSQL.  Now we have procedures as separate objects from
functions, so we need to clean up the documentation to not mix those
terms.

In particular, mentions of "trigger procedures" are changed to "trigger
functions", and access method "support procedures" are changed to
"support functions".  (The latter already used FUNCTION in the SQL
syntax anyway.)  Also, the terminology in the SPI chapter has been
cleaned up.

A few tests, examples, and code comments are also adjusted to be
consistent with documentation changes, but not everything.

Reported-by: Peter Geoghegan <pg@bowt.ie>
Reviewed-by: Jonathan S. Katz <jonathan.katz@excoventures.com>
2018-08-22 14:44:49 +02:00
b965f26171 Do not dump identity sequences with excluded parent table
This commit prevents a crash of pg_dump caused by the exclusion of a
table which has identity columns, as the table would be correctly
excluded but not its identity sequence.  In order to fix that, identity
sequences are excluded if the parent table is defined as such.  Knowing
about such sequences has no meaning without their parent table anyway.

Reported-by: Andy Abelisto
Author: David Rowley
Reviewed-by: Peter Eisentraut, Michael Paquier
Discussion: https://postgr.es/m/153479393218.1316.8472285660264976457@wrigleys.postgresql.org
Backpatch-through: 10
2018-08-22 14:21:49 +09:00
72be8c29a1 Fix set of NLS translation issues
While monitoring the code, a couple of issues related to string
translation has showed up:
- Some routines for auto-updatable views return an error string, which
sometimes missed the shot.  A comment regarding string translation is
added for each routine to help with future features.
- GSSAPI authentication missed two translations.
- vacuumdb handles non-translated strings.
- GetConfigOptionByNum should translate strings.  This part is not
back-patched as after a minor upgrade this could be surprising for
users.

Reported-by: Kyotaro Horiguchi
Author: Kyotaro Horiguchi
Reviewed-by: Michael Paquier, Tom Lane
Discussion: https://postgr.es/m/20180810.152131.31921918.horiguchi.kyotaro@lab.ntt.co.jp
Backpatch-through: 9.3
2018-08-21 15:17:13 +09:00
6771c932cf Ensure schema qualification in pg_restore DISABLE/ENABLE TRIGGER commands.
Previously, this code blindly followed the common coding pattern of
passing PQserverVersion(AH->connection) as the server-version parameter
of fmtQualifiedId.  That works as long as we have a connection; but in
pg_restore with text output, we don't.  Instead we got a zero from
PQserverVersion, which fmtQualifiedId interpreted as "server is too old to
have schemas", and so the name went unqualified.  That still accidentally
managed to work in many cases, which is probably why this ancient bug went
undetected for so long.  It only became obvious in the wake of the changes
to force dump/restore to execute with restricted search_path.

In HEAD/v11, let's deal with this by ripping out fmtQualifiedId's server-
version behavioral dependency, and just making it schema-qualify all the
time.  We no longer support pg_dump from servers old enough to need the
ability to omit schema name, let alone restoring to them.  (Also, the few
callers outside pg_dump already didn't work with pre-schema servers.)

In older branches, that's not an acceptable solution, so instead just
tweak the DISABLE/ENABLE TRIGGER logic to ensure it will schema-qualify
its output regardless of server version.

Per bug #15338 from Oleg somebody.  Back-patch to all supported branches.

Discussion: https://postgr.es/m/153452458706.1316.5328079417086507743@wrigleys.postgresql.org
2018-08-17 17:12:33 -04:00
b94f7b5350 pg_upgrade: issue helpful error message for use on standbys
Commit 777e6ddf1723306bd2bf8fe6f804863f459b0323 checked for a shut down
message from a standby and allowed it to continue.  This patch reports a
helpful error message in these cases, suggesting to use rsync as
documented.

Diagnosed-by: Martín Marqués

Discussion: https://postgr.es/m/CAPdiE1xYCow-reLjrhJ9DqrMu-ppNq0ChUUEvVdxhdjGRD5_eA@mail.gmail.com

Backpatch-through: 9.3
2018-08-17 10:25:48 -04:00
777e6ddf17 pg_upgrade: fix shutdown check for standby servers
Commit 244142d32afd02e7408a2ef1f249b00393983822 only tested for the
pg_controldata output for primary servers, but standby servers have
different "Database cluster state" output, so check for that too.

Diagnosed-by: Michael Paquier

Discussion: https://postgr.es/m/20180810164240.GM13638@paquier.xyz

Backpatch-through: 9.3
2018-08-14 17:19:02 -04:00
d4a900458e Cosmetic cleanups in initdb.c.
Commit bcbd94080 didn't bother to fix up a comment it had falsified.

Also, const-ify choose_dsm_implementation(), since what it's returning
is always a constant string; pickier compilers would warn about this.
2018-08-10 14:14:27 -04:00
03838b8049 Fix pg_upgrade to handle event triggers in extensions correctly.
pg_dump with --binary-upgrade must emit ALTER EXTENSION ADD commands
for all objects that are members of extensions.  It forgot to do so for
event triggers, as per bug #15310 from Nick Barnes.  Back-patch to 9.3
where event triggers were introduced.

Haribabu Kommi

Discussion: https://postgr.es/m/153360083872.1395.4593932457718151600@wrigleys.postgresql.org
2018-08-07 15:43:48 -04:00
5b5ed4756c Ensure pg_dump_sort.c sorts null vs non-null namespace consistently.
The original coding here (which is, I believe, my fault) supposed that
it didn't need to concern itself with the possibility that one object
of a given type-priority has a namespace while another doesn't.  But
that's not reliably true anymore, if it ever was; and if it does happen
then it's possible that DOTypeNameCompare returns self-inconsistent
comparison results.  That leads to unspecified behavior in qsort()
and a resultant weird output order from pg_dump.

This should end up being only a cosmetic problem, because any ordering
constraints that actually matter should be enforced by the later
dependency-based sort.  Still, it's a bug, so back-patch.

Report and fix by Jacob Champion, though I editorialized on his
patch to the extent of making NULL sort after non-NULL, for consistency
with our usual sorting definitions.

Discussion: https://postgr.es/m/CABAq_6Hw+V-Kj7PNfD5tgOaWT_-qaYkc+SRmJkPLeUjYXLdxwQ@mail.gmail.com
2018-08-07 13:13:42 -04:00
5a23c74b63 Reset properly errno before calling write()
6cb3372 enforces errno to ENOSPC when less bytes than what is expected
have been written when it is unset, though it forgot to properly reset
errno before doing a system call to write(), causing errno to
potentially come from a previous system call.

Reported-by: Tom Lane
Author: Michael Paquier
Reviewed-by: Tom Lane
Discussion: https://postgr.es/m/31797.1533326676@sss.pgh.pa.us
2018-08-05 05:31:18 +09:00
c7a8f78677 Remove no-longer-appropriate special case in psql's \conninfo code.
\conninfo prints the results of PQhost() and some other libpq functions.
It used to override the PQhost() result with the hostaddr parameter if
that'd been given, but that's unhelpful when multiple hosts were listed
in the connection string.  Furthermore, it seems unnecessary in the wake
of commit 1944cdc98, since PQhost does any useful substitution itself.
So let's just remove the extra code and print PQhost()'s result without
any editorialization.

Back-patch to v10, as 1944cdc98 (just) was.

Discussion: https://postgr.es/m/23287.1533227021@sss.pgh.pa.us
2018-08-03 12:20:47 -04:00
b6d6488a3a pg_upgrade: fix --check for live source server checks
Fix for commit 244142d32afd02e7408a2ef1f249b00393983822.

Backpatch-through: 9.3
2018-07-31 18:10:06 -04:00
f3eb76b399 Further fixes for quoted-list GUC values in pg_dump and ruleutils.c.
Commits 742869946 et al turn out to be a couple bricks shy of a load.
We were dumping the stored values of GUC_LIST_QUOTE variables as they
appear in proconfig or setconfig catalog columns.  However, although that
quoting rule looks a lot like SQL-identifier double quotes, there are two
critical differences: empty strings ("") are legal, and depending on which
variable you're considering, values longer than NAMEDATALEN might be valid
too.  So the current technique fails altogether on empty-string list
entries (as reported by Steven Winfield in bug #15248) and it also risks
truncating file pathnames during dump/reload of GUC values that are lists
of pathnames.

To fix, split the stored value without any downcasing or truncation,
and then emit each element as a SQL string literal.

This is a tad annoying, because we now have three copies of the
comma-separated-string splitting logic in varlena.c as well as a fourth
one in dumputils.c.  (Not to mention the randomly-different-from-those
splitting logic in libpq...)  I looked at unifying these, but it would
be rather a mess unless we're willing to tweak the API definitions of
SplitIdentifierString, SplitDirectoriesString, or both.  That might be
worth doing in future; but it seems pretty unsafe for a back-patched
bug fix, so for now accept the duplication.

Back-patch to all supported branches, as the previous fix was.

Discussion: https://postgr.es/m/7585.1529435872@sss.pgh.pa.us
2018-07-31 13:00:14 -04:00
c0a552921b Fix pg_dump's failure to dump REPLICA IDENTITY for constraint indexes.
pg_dump knew about printing ALTER TABLE ... REPLICA IDENTITY USING INDEX
for indexes declared as indexes, but it failed to print that for indexes
declared as unique or primary-key constraints.  Per report from Achilleas
Mantzios.

This has been broken since the feature was introduced, AFAICS.
Back-patch to 9.4.

Discussion: https://postgr.es/m/1e6cc5ad-b84a-7c07-8c08-a4d0c3cdc938@matrix.gatewaynet.com
2018-07-30 12:35:49 -04:00
fa7d5b704a Add verbosity to pg_basebackup for sync
This is useful to know when the data copy has been finished.  The
current situation can be confusing for users as the last message is
"waiting for background process to finish streaming", so it looks like
this is taking time but the final sync is instead.

Author: Jeff Janes
Discussion: https://postgr.es/m/CAMkU=1ypeoMJ=tFBG8vP13sxEtXd4Pm_x1SqsJdW_RvzpcvN=A@mail.gmail.com
2018-07-29 07:53:11 +09:00
244142d32a pg_upgrade: check for clean server shutdowns
Previously pg_upgrade checked for the pid file and started/stopped the
server to force a clean shutdown.  However, "pg_ctl -m immediate"
removes the pid file but doesn't do a clean shutdown, so check
pg_controldata for a clean shutdown too.

Diagnosed-by: Vimalraj A

Discussion: https://postgr.es/m/CAFKBAK5e4Q-oTUuPPJ56EU_d2Rzodq6GWKS3ncAk3xo7hAsOZg@mail.gmail.com

Backpatch-through: 9.3
2018-07-28 15:01:55 -04:00
60e3bd1d7f pg_upgrade: report database names with missing extension libs
Previously only the missing library name was reported, forcing users to
look in all databases to find the library entries.

Discussion: https://postgr.es/m/20180713162815.GA3835@momjian.us

Author: Daniel Gustafsson, me
2018-07-28 12:33:54 -04:00
39d51fe87d Fix handling of pgbench's hash when no argument is provided
Depending on the platform used, this can cause a crash in the worst
case, or an unhelpful error message, so fail gracefully.

Author: Fabien Coelho
Discussion: https://postgr.es/m/alpine.DEB.2.21.1807262302550.29874@lancre
Backpatch: 11-, where hash() has been added in pgbench.
2018-07-27 13:40:24 +09:00
fb421231da psql: Add option for procedures to \df 2018-07-24 11:38:53 +02:00
3214463228 pgbench: Remove duplicate entries from table of builtin functions.
Fabien Coelho

Discussion: http://postgr.es/m/alpine.DEB.2.21.1807221822320.19939@lancre
2018-07-23 11:48:38 -04:00
56df07bb9e Make more consistent some error messages for file-related operations
Some error messages which report something about a file operation use
as well context which is already provided within the path being worked
on, making things rather duplicated.  This creates more work for
translators, and does not actually bring clarity.

More could be done, however in a lot of cases the context used is
actually useful, still that patch gets down things with a good cut.

Author: Michael Paquier
Reviewed-by: Kyotaro Horiguchi, Tom Lane
Discussion: https://postgr.es/m/20180718044711.GA8565@paquier.xyz
2018-07-23 09:19:12 +09:00
04269320ae Further portability hacking in pg_upgrade's test script.
I blew the dust off a Bourne shell (file date 1996, yea verily) and
tried to run test.sh with it.  It mostly worked, but I found that the
temp-directory creation code introduced by commit be76a6d39 was not
compatible, for a couple of reasons: this shell thinks "set -e" should
force an exit if a command within backticks fails, and it also thinks code
within braces should be executed by a sub-shell, meaning that variable
settings don't propagate back up to the parent shell.  In view of Victor
Wagner's report that Solaris is still using pre-POSIX shells, seems like
we oughta make this case work.  It's not like the code is any less
idiomatic this way; the prior coding technique appeared nowhere else.

(There is a remaining bash-ism here, which is that $RANDOM doesn't do
what the code hopes in non-bash shells.  But the use of $$ elsewhere in
that path should be enough to ensure uniqueness and some amount of
randomness, so I think it's okay as-is.)

Back-patch to all supported branches, as the previous commit was.

Discussion: https://postgr.es/m/20180720153820.69e9ae6c@fafnir.local.vm
2018-07-21 15:40:51 -04:00
0c0908d926 Be more paranoid about quoting in pg_upgrade's test script.
Double-quote $PGDATA in "find" commands introduced by commit da9b580d8,
in case that path contains spaces or other special characters.

Adjust a few other places so that quoting is done more consistently.
None of the others are actual bugs AFAICS, but it's confusing to readers
if the same thing is done differently in different places.

Noted by Tels.

Discussion: https://postgr.es/m/c96303c04c360bbedaa04f90f515745b.squirrel@sm.webmail.pair.com
2018-07-21 12:05:25 -04:00
986127e3db Avoid unportable shell syntax in pg_upgrade's test script.
Most of test.sh uses traditional backtick syntax for command substitution,
but commit da9b580d8 introduced two uses of $(...) syntax, which is not
recognized by very old shells.  Bring those into line with the rest.

Victor Wagner

Discussion: https://postgr.es/m/20180720153820.69e9ae6c@fafnir.local.vm
2018-07-20 13:59:27 -04:00
90371a24a5 Improve psql's \d command to show whether index columns are key columns.
This is essential information when looking at an index that has
"included" columns.  Per discussion, follow the style used in \dC
and some other places: column header is "Key?" and values are "yes"
or "no" (all translatable).

While at it, revise describeOneTableDetails to be a bit more maintainable:
avoid hard-wired column numbers and multiple repetitions of what needs
to be identical test logic.  This also results in the emitted catalog
query corresponding more closely to what we print, which should be a
benefit to users of ECHO_HIDDEN mode, and perhaps a bit faster too
(the old logic sometimes asked for values it would not print, even
ones that are fairly expensive to get).

Discussion: https://postgr.es/m/21724.1531943735@sss.pgh.pa.us
2018-07-19 14:53:48 -04:00
6b387179ba Fix misc typos, mostly in comments.
A collection of typos I happened to spot while reading code, as well as
grepping for common mistakes.

Backpatch to all supported versions, as applicable, to avoid conflicts
when backporting other commits in the future.
2018-07-18 16:17:32 +03:00
811b6e36a9 Rework error messages around file handling
Some error messages related to file handling are using the code path
context to define their state.  For example, 2PC-related errors are
referring to "two-phase status files", or "relation mapping file" is
used for catalog-to-filenode mapping, however those prove to be
difficult to translate, and are not more helpful than just referring to
the path of the file being worked on.  So simplify all those error
messages by just referring to files with their path used.  In some
cases, like the manipulation of WAL segments, the context is actually
helpful so those are kept.

Calls to the system function read() have also been rather inconsistent
with their error handling sometimes not reporting the number of bytes
read, and some other code paths trying to use an errno which has not
been set.  The in-core functions are using a more consistent pattern
with this patch, which checks for both errno if set or if an
inconsistent read is happening.

So as to care about pluralization when reading an unexpected number of
byte(s), "could not read: read %d of %zu" is used as error message, with
%d field being the output result of read() and %zu the expected size.
This simplifies the work of translators with less variations of the same
message.

Author: Michael Paquier
Reviewed-by: Álvaro Herrera
Discussion: https://postgr.es/m/20180520000522.GB1603@paquier.xyz
2018-07-18 08:01:23 +09:00
a06e56b247 doc: Update redirecting links
Update links that resulted in redirects.  Most are changes from http to
https, but there are also some other minor edits.  (There are still some
redirects where the target URL looks less elegant than the one we
currently have.  I have left those as is.)
2018-07-16 10:48:05 +02:00
93ad00c968 Dump foreign keys on partitioned tables
The patch that ended up as commit 3de241dba86f ("Foreign keys on
partitioned tables") lacked pg_dump tests, so the pg_dump code that was
there to support it inadvertently stopped working when in later
development I modified the backend code not to emit pg_trigger rows for
the partitioned table itself.

Bug analysis and code fix is by Michaël.  I (Álvaro) added the test.

Reported-by: amul sul <sulamul@gmail.com>
Co-authored-by: Michaël Paquier <michael@paquier.xyz>
Co-authored-by: Álvaro Herrera <alvherre@alvh.no-ip.org>
Discussion: https://postgr.es/m/CAAJ_b94n=UsNVhgs97vCaWEZAMe-tGDRVuZ73oePQH=eaJKGSA@mail.gmail.com
2018-07-13 13:13:26 -04:00
387a5cfb94 Add pg_dump --on-conflict-do-nothing option.
When dumping INSERT statements, optionally add ON CONFLICT DO NOTHING.

Author: Surafel Temesgen
Reviewed-by: Takeshi Ideriha, Nico Williams, Dilip Kumar
Discussion: https://postgr.es/m/CALAY4q-PQ9cOEzs2%2BQHK5ObfF_4QbmBaYXbZx6BGGN66Q-n8FA%40mail.gmail.com
2018-07-13 13:57:03 +12:00
8e599897ca Improve two error messages 2018-07-12 12:35:59 +02:00
bcbd940806 Remove dynamic_shared_memory_type=none
PostgreSQL nowadays offers some kind of dynamic shared memory feature on
all supported platforms.  Having the choice of "none" prevents us from
relying on DSM in core features.  So this patch removes the choice of
"none".

Author: Kyotaro Horiguchi <horiguchi.kyotaro@lab.ntt.co.jp>
2018-07-10 18:35:24 +02:00
8a00b96aa9 Add pg_rewind --no-sync
This is an option consistent with what pg_dump and pg_basebackup provide
which is useful for leveraging the I/O effort when testing things, not
to be used in a production environment.

Author: Michael Paquier
Reviewed-by: Heikki Linnakangas
Discussion: https://postgr.es/m/20180325122607.GB3707@paquier.xyz
2018-07-10 08:51:10 +09:00
9a4059d4ff Simplify logic to sync target directory at the end of pg_rewind
The previous sync logic relied on looking for and then launching
externally initdb -S, which is a simple wrapper on top of fsync_pgdata.
There is nothing preventing pg_rewind to directly call this routine, so
remove the dependency to initdb and just call it directly.

Author: Michael Paquier
Reviewed-by: Heikki Linnakangas
Discussion: https://postgr.es/m/20180325122607.GB3707@paquier.xyz
2018-07-10 08:39:27 +09:00
a22445ff0b Flip argument order in XLogSegNoOffsetToRecPtr
Commit fc49e24fa69a added an input argument after the existing output
argument.  Flip those.

Author: Álvaro Herrera <alvherre@alvh.no-ip.org>
Reviewed-by: Andres Freund <andres@anarazel.de>
Discussion: https://postgr.es/m/20180708182345.imdgovmkffgtihhk@alvherre.pgsql
2018-07-09 14:33:38 -04:00
2c059c86ba Add $Test::Builder::Level to pgbench test functions
same as c4309f4aeeae54e4c5281d68e29288af1d0d1ed2
2018-07-03 23:22:01 +02:00
6837078687 Correct comment 2018-07-03 19:55:00 +02:00
c4309f4aee Use $Test::Builder::Level in TAP test functions
In TAP test functions, that is, those that produce test results, locally
increment $Test::Builder::Level.  This has the effect that test failures
are reported at the callers location rather than somewhere in the test
support libraries.

Reviewed-by: Heikki Linnakangas <hlinnaka@iki.fi>
2018-07-01 12:58:32 +02:00
d842139099 perltidy run prior to branching 2018-06-30 12:28:55 -04:00
1e9c858090 pgindent run prior to branching 2018-06-30 12:25:49 -04:00
bc87f22ef6 psql: show cloned triggers in partitions
In a partition, row triggers that had been cloned from their parent
partitioned table would not be listed at all in psql's \d, which could
surprise users, per insistent complaint from Ashutosh Bapat (though his
aim was elsewhere).  The simplest possible fix, suggested by Peter
Eisentraut, seems to be to list triggers marked as internal if they have
a row in pg_depend that points to some other trigger.

Author: Álvaro Herrera
Discussion: https://postgr.es/m/20180618165910.p26vhk7dpq65ix54@alvherre.pgsql
2018-06-29 11:53:22 -04:00
c672d709b0 Fix description and documentation related to pg_restore --no-comments
These descriptions have been referring to object dump, but a restore
operation is done.

Reported-by: Andrey Lizenko
Author: Andrey Lizenko
Discussion: https://postgr.es/m/152992021588.1268.16786093506650391435@wrigleys.postgresql.org
2018-06-26 14:57:53 +09:00
d08c3d5197 Correct handling of fsync failures with tar mode of walmethods.c
This file has been missing the fact that it needs to report back to
callers a proper failure on fsync calls.  I have spotted the one in
tar_finish() while Kuntal has spotted the one in tar_close().

Backpatch down to 10 where this code has been introduced.

Reported by: Michael Paquier, Kuntal Ghosh
Author: Michael Paquier
Reviewed-by: Kuntal Ghosh, Magnus Hagander
Discussion: https://postgr.es/m/20180625024356.GD1146@paquier.xyz
2018-06-26 09:41:58 +09:00
299addd592 Translation updates
Source-Git-URL: https://git.postgresql.org/git/pgtranslation/messages.git
Source-Git-Hash: 884f33d735870f94357820800840af3e93ff4628
2018-06-25 12:37:18 +02:00
6cb3372411 Address set of issues with errno handling
System calls mixed up in error code paths are causing two issues which
several code paths have not correctly handled:
1) For write() calls, sometimes the system may return less bytes than
what has been written without errno being set.  Some paths were careful
enough to consider that case, and assumed that errno should be set to
ENOSPC, other calls missed that.
2) errno generated by a system call is overwritten by other system calls
which may succeed once an error code path is taken, causing what is
reported to the user to be incorrect.

This patch uses the brute-force approach of correcting all those code
paths.  Some refactoring could happen in the future, but this is let as
future work, which is not targeted for back-branches anyway.

Author: Michael Paquier
Reviewed-by: Ashutosh Sharma
Discussion: https://postgr.es/m/20180622061535.GD5215@paquier.xyz
2018-06-25 11:19:05 +09:00