Commit Graph

42 Commits

Author SHA1 Message Date
NIIBE Yutaka b298322d36
common: Clean up the temporary file at dotlock_destroy.
* common/dotlock.c (dotlock_destroy): Clean up the temporary file
created when it fails.

--

Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2023-12-20 11:05:36 +09:00
NIIBE Yutaka 2f6fec3f48
common: Support not-removing the lockfile by dotlock_destroy.
* common/dotlock.c (dotlock_destroy): Keep the lock
when DOTLOCK_LOCK_BY_PARENT.

--

Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2023-12-20 11:05:22 +09:00
NIIBE Yutaka 5488ad0517
common: Fix a possible resource leak for dotlock.
* common/dotlock.c (dotlock_destroy_unix): Don't release ->TNAME here.
(dotlock_destroy): Release the memory unconditionally.

--

Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2023-12-20 11:05:12 +09:00
NIIBE Yutaka 6b4fd3a5da
common: Enhance dotlock, so that we can have a CLI util.
* common/dotlock.h (DOTLOCK_LOCK_BY_PARENT, DOTLOCK_LOCKED): New.
* common/dotlock.c [HAVE_POSIX_SYSTEM]: Include <dirent.h>.
(dotlock_get_process_id, dotlock_detect_tname): New.
(dotlock_create_unix): Handle the case when no_write option is
specified.  Not creating the lock file, but detect the the file of
tname.
(dotlock_create) [HAVE_POSIX_SYSTEM]: Add support of
DOTLOCK_LOCK_BY_PARENT and DOTLOCK_LOCKED for dotlock CLI util.
(dotlock_take_unix): Support the case of DOTLOCK_LOCK_BY_PARENT.

--

Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2023-12-19 15:59:41 +09:00
Werner Koch 937aeb1904
common: Add an info callback to dotlock.
* common/dotlock.h (enum dotlock_reasons): New.
(DOTLOCK_PREPARE_CREATE): New flag.
* common/dotlock.c (struct dotlock_handle): Add info_cb and
info_cb_value.
(dotlock_create): Support the new flag.
(dotlock_finish_create): New.
(read_lockfile): Silence in case of ENOENT.
(dotlock_set_info_cb): New.  Use callback after all error and info
messages.
(dotlock_take_unix, dotlock_take_w32): Allow termination by callback.
2023-12-18 15:21:26 +01:00
Werner Koch f57717bf23
common: Improve error return for dotlock.
* common/dotlock.c (dotlock_take_unix): Return a ETIMEDOUT insteaad of
EACCESS on timeout.
(dotlock_take_w32): Ditto.
2023-12-12 16:31:30 +01:00
Werner Koch 9a3e41c151
common: Improve lock strategy for dotlock.
* common/dotlock.c (next_wait_interval): New.
(dotlock_take_unix): Use new function.
(dotlock_take_w32): Ditto.
--

In particular when using a dotlock file for protecting the spawning
and several processes try to spawn the agent or another component, we
often run into long delays.  The solution is to is to exponential
backoff and also to reduce the initial delay from 50ms to 4ms.  We
further limit the maximum wait period to about 2 seconds and then
repeat at intervals of 512, 1024 and 2048ms.  In the wait-forever case
we add a small random value to have different intervals per process.

GnuPG-bug-id: 3380

For testing this code snippet in the spawning function might be
useful:

          const char *s;
          if ((s=getenv("hold_gpg_file")))
            while (!gnupg_access (s, F_OK))
              gnupg_sleep (1);
2023-10-02 14:45:19 +02:00
NIIBE Yutaka 18a3ce1c9b
common: Remove Windows CE support in common.
* common/Makefile.am (HAVE_W32CE_SYSTEM): Remove conditional build.
(common_sources): Remove exechelp-w32ce.c.
* common/asshelp.c [HAVE_W32CE_SYSTEM]: Remove the support.
* common/common-defs.h [HAVE_W32CE_SYSTEM]: Likewise.
* common/dotlock.c [HAVE_W32CE_SYSTEM]: Likewise.
* common/exechelp-posix.c [HAVE_W32CE_SYSTEM]: Likewise.
* common/exechelp-w32.c [HAVE_W32CE_SYSTEM]: Likewise.
* common/gettime.c [HAVE_W32CE_SYSTEM]: Likewise.
* common/exechelp-w32ce.c: Remove.
* po/POTFILES.in: Update to remove common/exechelp-w32ce.c.

--

Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2022-11-16 10:05:37 +09:00
NIIBE Yutaka 2f1afc1296 common: Fix another race condition, and address the other one.
* common/dotlock.c (dotlock_take_unix): Do same when same PID
process detects stale lockfile.  Add comment.

--

GnuPG-bug-id: 5884
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2022-03-19 14:47:59 +09:00
NIIBE Yutaka d94b411f12 common: Fix a race condition removing stale lockfile.
* common/dotlock.c (read_lockfile): Return the file descriptor when
R_FD is available.
(dotlock_take_unix): Check the case the lockfile was already removed.

--

GnuPG-bug-id: 5884
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2022-03-18 14:33:53 +09:00
Werner Koch b6967d3191
gpg,w32: Fix gnupg_remove.
* common/sysutils.c (map_w32_to_errno): New.
(gnupg_w32_set_errno): New.
(gnupg_remove) [w32]: Set ERRNO
--

To support Unicode gnupg_remove was changed to use DeleteFileW and not
properly tested because the code was alreadt used in Windows CE.
However, ERRNO was not set and thus Dirmngr failed due to

 if (!gnupg_remove (fname))
   log_info (_("removed stale te[...] file '%s'\n"), fname);
 else if (errno != ENOENT)
   {
     err = gpg_error_from_syserror ();
     log_error (_("problem remov[...] file '%s': %s\n"),
                fname, gpg_strerror (err));
     goto leave;
   }

GnuPG-bug-id: 5230
2021-01-11 14:19:06 +01:00
Werner Koch fc0eaa9add
common: Remove superfluous debug output from dotlock.c.
* common/dotlock.c (dotlock_create_unix): Remove debug output.
--

This was left over from developement about 10 years ago.  Exhibits
itself when using sshfs.

GnuPG-bug-id: 5193
2020-12-21 19:43:35 +01:00
Werner Koch b47c355b18
w32: Allow Unicode filenames for dotlock
* common/dotlock.c (any8bitchar) [W32]: New.
(dotlock_create_w32): Use strconcat and CreateFileW.

* common/t-dotlock.c: Source include dotlock.c and modify to allow
manual testing on Windows.
--

GnuPG-bug-id: 5098
Signed-off-by: Werner Koch <wk@gnupg.org>
2020-10-20 13:38:11 +02:00
Daniel Kahn Gillmor 0904b8ef34 Spelling cleanup.
No functional changes, just fixing minor spelling issues.

---

Most of these were identified from the command line by running:

  codespell \
    --ignore-words-list fpr,stati,keyserver,keyservers,asign,cas,iff,ifset \
    --skip '*.po,ChangeLog*,help.*.txt,*.jpg,*.eps,*.pdf,*.png,*.gpg,*.asc' \
    doc g13 g10 kbx agent artwork scd tests tools am common dirmngr sm \
    NEWS README README.maint TODO

Signed-off-by: Daniel Kahn Gillmor <dkg@fifthhorseman.net>
2020-02-18 18:07:46 -05:00
Werner Koch cc531cc210
doc: Typ fix in comment
--
2019-12-23 12:40:43 +01:00
Daniel Kahn Gillmor 54eb375ff1 all: fix spelling and typos
Signed-off-by: Daniel Kahn Gillmor <dkg@fifthhorseman.net>
2018-10-24 15:56:18 -04:00
NIIBE Yutaka 5c8fe54809 Spelling fixes in docs and comments.
--

In addition, fix trailing spaces in tests/inittests.

GnuPG-bug-id: 3121
Reported-by: ka7 (klemens)
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2017-04-28 10:06:33 +09:00
Werner Koch 55b6c2595a
Clarify text of LGPLv2+/GPLv2+ licensed files.
--
2017-02-24 13:48:28 +01:00
Yuri Chornoivan 24cf0606b4 Clean up word replication.
--

This fixes extra word repetitions (like "the the" or "is is") in the
code and docs.

Signed-off-by: Daniel Kahn Gillmor <dkg@fifthhorseman.net>
2017-02-21 13:11:46 -05:00
Werner Koch 4d7dc432b5
Change all http://www.gnu.org in license notices to https://
--
2016-11-05 12:02:19 +01:00
Werner Koch 4aceebf36f
common: Make sure dotlock functions set a proper ERRNO.
* common/dotlock.c (map_w32_to_errno): New.
(read_lockfile): Return a proper ERRNO.
(dotlock_create_unix): Do not let log functions clobber ERRNO.
(dotlock_take_unix): Ditto.
(dotlock_release_unix): Ditto.
(dotlock_create_w32): Set proper ERRNO.
(dotlock_take_w32): Ditto.
(dotlock_release_w32): Ditto.

Signed-off-by: Werner Koch <wk@gnupg.org>
2016-01-13 14:42:12 +01:00
Justus Winter a9e0905342 Fix typos found using codespell.
* agent/cache.c: Fix typos.
* agent/call-pinentry.c: Likewise.
* agent/call-scd.c: Likewise.
* agent/command-ssh.c: Likewise.
* agent/command.c: Likewise.
* agent/divert-scd.c: Likewise.
* agent/findkey.c: Likewise.
* agent/gpg-agent.c: Likewise.
* agent/w32main.c: Likewise.
* common/argparse.c: Likewise.
* common/audit.c: Likewise.
* common/audit.h: Likewise.
* common/convert.c: Likewise.
* common/dotlock.c: Likewise.
* common/exechelp-posix.c: Likewise.
* common/exechelp-w32.c: Likewise.
* common/exechelp-w32ce.c: Likewise.
* common/exechelp.h: Likewise.
* common/helpfile.c: Likewise.
* common/i18n.h: Likewise.
* common/iobuf.c: Likewise.
* common/iobuf.h: Likewise.
* common/localename.c: Likewise.
* common/logging.c: Likewise.
* common/openpgp-oid.c: Likewise.
* common/session-env.c: Likewise.
* common/sexputil.c: Likewise.
* common/sysutils.c: Likewise.
* common/t-sexputil.c: Likewise.
* common/ttyio.c: Likewise.
* common/util.h: Likewise.
* dirmngr/cdblib.c: Likewise.
* dirmngr/certcache.c: Likewise.
* dirmngr/crlcache.c: Likewise.
* dirmngr/dirmngr-client.c: Likewise.
* dirmngr/dirmngr.c: Likewise.
* dirmngr/dirmngr_ldap.c: Likewise.
* dirmngr/dns-stuff.c: Likewise.
* dirmngr/http.c: Likewise.
* dirmngr/ks-engine-hkp.c: Likewise.
* dirmngr/ks-engine-ldap.c: Likewise.
* dirmngr/ldap-wrapper.c: Likewise.
* dirmngr/ldap.c: Likewise.
* dirmngr/misc.c: Likewise.
* dirmngr/ocsp.c: Likewise.
* dirmngr/validate.c: Likewise.
* g10/encrypt.c: Likewise.
* g10/getkey.c: Likewise.
* g10/gpg.c: Likewise.
* g10/gpgv.c: Likewise.
* g10/import.c: Likewise.
* g10/keydb.c: Likewise.
* g10/keydb.h: Likewise.
* g10/keygen.c: Likewise.
* g10/keyid.c: Likewise.
* g10/keylist.c: Likewise.
* g10/keyring.c: Likewise.
* g10/mainproc.c: Likewise.
* g10/misc.c: Likewise.
* g10/options.h: Likewise.
* g10/packet.h: Likewise.
* g10/parse-packet.c: Likewise.
* g10/pkclist.c: Likewise.
* g10/pkglue.c: Likewise.
* g10/plaintext.c: Likewise.
* g10/server.c: Likewise.
* g10/sig-check.c: Likewise.
* g10/sqlite.c: Likewise.
* g10/tdbio.c: Likewise.
* g10/test-stubs.c: Likewise.
* g10/tofu.c: Likewise.
* g10/trust.c: Likewise.
* g10/trustdb.c: Likewise.
* g13/create.c: Likewise.
* g13/mountinfo.c: Likewise.
* kbx/keybox-blob.c: Likewise.
* kbx/keybox-file.c: Likewise.
* kbx/keybox-init.c: Likewise.
* kbx/keybox-search-desc.h: Likewise.
* kbx/keybox-search.c: Likewise.
* kbx/keybox-update.c: Likewise.
* scd/apdu.c: Likewise.
* scd/app-openpgp.c: Likewise.
* scd/app-p15.c: Likewise.
* scd/app.c: Likewise.
* scd/ccid-driver.c: Likewise.
* scd/command.c: Likewise.
* scd/iso7816.c: Likewise.
* sm/base64.c: Likewise.
* sm/call-agent.c: Likewise.
* sm/call-dirmngr.c: Likewise.
* sm/certchain.c: Likewise.
* sm/gpgsm.c: Likewise.
* sm/import.c: Likewise.
* sm/keydb.c: Likewise.
* sm/minip12.c: Likewise.
* sm/qualified.c: Likewise.
* sm/server.c: Likewise.
* tools/gpg-check-pattern.c: Likewise.
* tools/gpgconf-comp.c: Likewise.
* tools/gpgkey2ssh.c: Likewise.
* tools/gpgparsemail.c: Likewise.
* tools/gpgtar.c: Likewise.
* tools/rfc822parse.c: Likewise.
* tools/symcryptrun.c: Likewise.

Signed-off-by: Justus Winter <justus@g10code.com>
2015-11-17 12:50:22 +01:00
Werner Koch 172b619348
common: Remove JNLIB from boiler plate (jnlib merge).
* common/README.jnlib: Remove.
--

This is the final part of merging jnlib into gnupg/common.
2015-04-24 16:42:28 +02:00
Werner Koch 17bcd08708
common: Remove libjnlib-config.h (jnlib merge).
* common/libjnlib-config.h: Remove.
* common/common-defs.h (getenv) [HAVE_GETENV]: New.  From removed
header.
(getpid) [HAVE_W32CE_SYSTEM]: New.  From removed header.
* common/argparse.c: Include util.h and common-defs.h.  Replace
jnlib_ macro names for non-GNUPG builds by x* names.
* common/dotlock.c: Ditto.
* common/logging.c: Include util.h and common-defs.h.  Replace jnlib_
symbol names by x* names.
* common/strlist.c: Ditto.
* common/utf8conv.c: Ditto.
* common/w32-reg.c: Ditto.
* common/mischelp.c: Ditto.  Also remove _jnlib_free.
* common/stringhelp.c: Ditto.
(JNLIB_LOG_WITH_PREFIX): Do not depend on this macro.
* common/logging.h (JNLIB_LOG_WITH_PREFIX): Do not depend on this
macro.
--

This is part 1 of the patches to merge the jnlib files into common/.
It does not make much sense to keep jnlib/ files separate.  They are
not often use elsewhere and maintaining the complex marcos stuff is
too troublesome for the future.

Signed-off-by: Werner Koch <wk@gnupg.org>
2015-04-24 15:19:10 +02:00
Daniel Kahn Gillmor 628b111fa6 avoid double-close in unusual dotlock situations
* common/dotlock.c: (dotlock_create_unix) avoid double-close()
 in unusual situations.

--

close(2) says:

 close() should not be retried after an EINTR since this  may
       cause a reused descriptor from another thread to be closed.

Before this patch was applied, if close(fd) failed with EINTR, it
would be closed again in the write_failed: block.

It could also have been closed a second time in the case that
(use_hardlinks_p (h->tname)) evaluated to something other than 0 or 1.

This patch avoids both of those scenarios.

Note that close() could still be called twice on the same file
descriptor if the first close(fd) fails but errno is not EINTR.  I'm
not sure the right thing to do in that scenario.  An alternate
resolution could be to unequivocally set fd to -1 after the first
failed close(fd), avoiding the errno == EINTR test.

Debian-Bug-Id: 773423
2014-12-22 12:56:13 +01:00
Werner Koch 3032fc3ad7 Silence several warnings when building under Windows.
* agent/call-scd.c (start_scd): Replace int by assuan_fd_t.
(start_pinentry): Ditto.
* common/asshelp.c (start_new_gpg_agent): Replace int by assuan_fd_t.
* common/dotlock.c (GNUPG_MAJOR_VERSION): Include stringhelp.h for
prototypes on Windows and some other platforms.
* common/logging.c (fun_writer): Declare addrbuf only if needed.
* g10/decrypt.c (decrypt_message_fd) [W32]: Return not_implemented.
* g10/encrypt.c (encrypt_crypt) [W32]: Return error if used in server
mode.
* g10/dearmor.c (dearmor_file, enarmor_file): Replace GNUPG_INVALID_FD
by -1 as temporary hack for Windows.
* g10/export.c (do_export): Ditto.
* g10/revoke.c (gen_desig_revoke, gen_revoke): Ditto.
* g10/sign.c (sign_file, clearsign_file, sign_symencrypt_file): Ditto.
* g10/server.c (cmd_verify, gpg_server) [W32]: Return an error.
--

The gpg server mode is not actual working and thus we can avoid the
warnings by explicitly disabling the mode.  We keep it working under
Unix, though.
2014-03-07 16:06:35 +01:00
Werner Koch 096e7457ec Change all quotes in strings and comments to the new GNU standard.
The asymmetric quotes used by GNU in the past (`...') don't render
nicely on modern systems.  We now use two \x27 characters ('...').

The proper solution would be to use the correct Unicode symmetric
quotes here.  However this has the disadvantage that the system
requires Unicode support.  We don't want that today.  If Unicode is
available a generated po file can be used to output proper quotes.  A
simple sed script like the one used for en@quote is sufficient to
change them.

The changes have been done by applying

  sed -i "s/\`\([^'\`]*\)'/'\1'/g"

to most files and fixing obvious problems by hand.  The msgid strings in
the po files were fixed with a similar command.
2012-06-05 19:29:22 +02:00
Marcus Brinkmann ff2095ad7b Revert last change, add comment about link() return values.
* common/dotlock.c (use_hardlinks_p, dotlock_take_unix): Do not check
return value of link().
2012-01-03 17:32:41 +01:00
Marcus Brinkmann 0dce26778e Fix compiler warnings.
* common/dotlock.c (use_hardlinks_p, dotlock_take_unix): Check return
value of link().
* g13/g13.c: Make sure err is initialized.
* scd/scdaemon.c (main) [!USE_GCRY_THREAD_CBS]: Do not define ERR.
2012-01-03 17:08:01 +01:00
Werner Koch 7dfcc9f19a Allow distribution of dotlock.* also under a modified BSD license 2011-10-24 11:38:17 +02:00
Werner Koch cdd152bf49 Change JNLIB license to LGPLv3+ or GPLv2+.
This is to allow the use of this code with code under GPLv2(only).
2011-09-30 12:53:34 +02:00
Werner Koch a2d081a20a Add prefix macro for dotlock functions.
Also fixed a type in the GLIB version.
2011-09-30 09:45:21 +02:00
Werner Koch f61b5371c4 Add dotlock_get_fd and dotlock_set_fd. 2011-09-29 16:51:48 +02:00
Werner Koch bf3d5beb71 Make dotlock.c thread-safe on pthread systems.
This is achieved by passing the define DOTLOCK_USE_PTHREAD.
2011-09-29 15:27:01 +02:00
Werner Koch ed8e267859 Add a flag parameter to dotlock_create.
This allows us to extend this function in the future.
2011-09-28 15:41:58 +02:00
Werner Koch 567a31c2a0 Allow arbitrary timeouts with dotlock. 2011-09-28 11:47:40 +02:00
Werner Koch 8a033fecfb Improved the dotlock module.
- It is now more portable and may be used outside of GnuPG
- vfat file systems are now supported.
- The use of link(2) is more robust.
- Wrote extensive documentation.
2011-09-27 17:18:56 +02:00
Werner Koch b73ae3ca36 Renamed the lock functions.
Also cleaned up the dotlock code for easier readability.
2011-09-23 14:43:58 +02:00
Werner Koch acde3f8ea6 Remove support for RISCOS from dotlock.c 2011-09-22 14:27:32 +02:00
Werner Koch b008274afd Nuked almost all trailing white space.
We better do this once and for all instead of cluttering all future
commits with diffs of trailing white spaces.  In the majority of cases
blank or single lines are affected and thus this change won't disturb
a git blame too much.  For future commits the pre-commit scripts
checks that this won't happen again.
2011-02-04 12:57:53 +01:00
Werner Koch f080b353ed More changes for CE. gpgsm does now build and run a keylisting. 2010-03-24 12:15:30 +00:00
Werner Koch d8b1099d01 Merged jnlib into common. 2010-03-10 12:24:58 +00:00