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dbus/bus
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Simon McVittie 3d538ced10 Make sure non-aborting signal handlers save and restore errno 
If an async signal interrupts some function, we can have this
anti-pattern:

    /* in normal code */
    result = some_syscall (); /* fails, e.g. errno = EINVAL */

        /* interrupted by async signal handler */
        write (...); /* fails, e.g. errno = ENOBUFS */

    /* back to normal code */
    if (errno == EINVAL) /* problem! it should be but it isn't */

The solution is for signal handlers to save and restore errno.

This is unnecessary for signal handlers that can't touch errno (like
the one in dbus-launch that just sets a flag), and for signal handlers
that never return (like the one in test-utils-glib for timeouts).

Bug: https://bugs.freedesktop.org/show_bug.cgi?id=103010
Signed-off-by: Simon McVittie <smcv@collabora.com>
Reviewed-by: Philip Withnall <withnall@endlessm.com>
2017-09-27 15:14:12 +01:00
..
legacy-config On Windows, load local configuration relative to bus setup 2015-10-02 11:24:05 +01:00
systemd-user dbus-daemon: add --syslog, --nosyslog, --syslog-only 2016-09-30 19:36:50 +01:00
sysusers.d systemd: add sysusers.d snippet for booting up with unpopulated /etc 2017-02-13 14:49:52 +00:00
tmpfiles.d Install a systemd tmpfiles.d snippet to create /var/lib/dbus/machine-id 2017-06-28 19:09:53 +01:00
.gitignore Update .gitignore files 2015-02-03 15:40:01 +00:00
activation-exit-codes.h Bug 21161 - Update the FSF address 2009-07-14 15:39:47 -04:00
activation-helper-bin.c launch-helper: fix error code parsing 2013-10-09 10:51:39 +01:00
activation-helper.c activation-helper: Rename bus_config_parser_get_service_dirs 2017-02-21 13:23:37 +00:00
activation-helper.h Add missing include 2016-02-11 20:31:31 +00:00
activation.c activation: Add support for enforcing strict naming on .service files 2017-02-21 13:23:37 +00:00
activation.h Mediate auto-activation attempts through AppArmor 2016-11-28 12:11:45 +00:00
apparmor.c Mediate auto-activation attempts through AppArmor 2016-11-28 12:11:45 +00:00
apparmor.h Do not auto-activate services if we could not send a message 2016-11-28 12:11:41 +00:00
audit.c _dbus_change_to_daemon_user (audit code path): set DBusError correctly 2016-08-12 17:34:29 +01:00
audit.h audit: use DBUS_SYSTEM_LOG_WARNING if we cannot open the audit fd 2015-08-06 17:12:37 +01:00
bus.c internals: Decouple logging an error from exiting unsuccessfully 2017-07-05 13:12:37 +01:00
bus.h Do not auto-activate services if we could not send a message 2016-11-28 12:11:41 +00:00
config-loader-expat.c config-loader-expat: Tell Expat not to defend against hash collisions 2017-07-28 11:17:04 +01:00
config-parser-common.c Move defaults for some switches into a default case 2017-01-17 17:20:53 +00:00
config-parser-common.h Add apparmor element support to bus config parsing 2015-02-18 17:04:00 +00:00
config-parser-trivial.c activation-helper: Rename bus_config_parser_get_service_dirs 2017-02-21 13:23:37 +00:00
config-parser-trivial.h activation-helper: Rename bus_config_parser_get_service_dirs 2017-02-21 13:23:37 +00:00
config-parser.c config-parser: Fail on impossible send_broadcast/send_destination pair 2017-09-25 13:37:56 +01:00
config-parser.h activation: Add support for enforcing strict naming on .service files 2017-02-21 13:23:37 +00:00
connection.c Remove calls to sidget/sidput 2017-05-31 13:39:29 +01:00
connection.h Log to syslog if max_completed_connections or max_connections_per_user are exceeded 2016-08-16 16:16:32 +01:00
dbus.service.in dbus-daemon: add --syslog, --nosyslog, --syslog-only 2016-09-30 19:36:50 +01:00
dbus.socket.in systemd: enable the dbus service unconditionally 2010-09-06 03:21:17 +02:00
desktop-file.c Be more const-correct 2016-10-13 17:20:28 +01:00
desktop-file.h Mediate auto-activation attempts through AppArmor 2016-11-28 12:11:45 +00:00
dir-watch-default.c Fix warnings on Windows builds. 2010-04-14 08:26:40 +02:00
dir-watch-inotify.c Remove trailing newlines from _dbus_warn, _dbus_warn_check_failed 2016-09-30 19:36:51 +01:00
dir-watch-kqueue.c Remove trailing newlines from _dbus_warn, _dbus_warn_check_failed 2016-09-30 19:36:51 +01:00
dir-watch.h Clean up inotify watch handling 2010-02-01 16:22:56 -05:00
dispatch.c tests: Don't exercise GetMachineId() or autolaunch if no machine ID 2017-06-08 18:30:39 +01:00
dispatch.h Bug 21161 - Update the FSF address 2009-07-14 15:39:47 -04:00
driver.c bus_driver_send_ack_reply: Make available to other modules 2017-06-29 15:43:25 +01:00
driver.h bus_driver_send_ack_reply: Make available to other modules 2017-06-29 15:43:25 +01:00
example-session-disable-stats.conf.in config: add examples to show how to enable/disable the Stats interface 2014-10-01 16:38:40 +01:00
example-system-enable-stats.conf.in config: add examples to show how to enable/disable the Stats interface 2014-10-01 16:38:40 +01:00
expirelist.c bus: Fix timeout restarts 2017-02-01 10:42:50 +00:00
expirelist.h Bug 21161 - Update the FSF address 2009-07-14 15:39:47 -04:00
main.c Make sure non-aborting signal handlers save and restore errno 2017-09-27 15:14:12 +01:00
Makefile.am Remove distribution-specific init-scripts 2017-09-25 20:28:46 +01:00
org.freedesktop.dbus-session.plist.in 10.4 is old so set more sensible launchd defaults. 2010-12-09 08:20:07 +01:00
policy.c policy: Add max_fds, min_fds qualifiers for send, receive rules 2017-07-28 11:36:51 +01:00
policy.h policy: Add max_fds, min_fds qualifiers for send, receive rules 2017-07-28 11:36:51 +01:00
selinux.c Return the dbus-daemon SELinux context when asking about org.freedesktop.DBus 2017-06-12 11:56:13 +01:00
selinux.h Return the dbus-daemon SELinux context when asking about org.freedesktop.DBus 2017-06-12 11:56:13 +01:00
services.c Log when we exceed max_names_per_connection (aka max_services_per_connection) 2016-08-16 17:44:30 +01:00
services.h Bug 21161 - Update the FSF address 2009-07-14 15:39:47 -04:00
session.conf.in On Windows, load local configuration relative to bus setup 2015-10-02 11:24:05 +01:00
signals.c signals: Add some missing assertions to inline unit tests 2017-02-13 14:51:29 +00:00
signals.h Mediation of processes eavesdropping 2015-02-18 18:59:46 +00:00
stats.c driver: Share bus_driver_get_conn_helper with other modules 2017-06-29 15:42:20 +01:00
stats.h Implement GetAllMatchRules on the Stats interface 2014-09-25 12:59:50 +01:00
system.conf.in system.conf: Allow unprivileged users to get dbus-daemon properties 2017-07-06 18:31:51 +01:00
test-launch-helper.c Add missing function attributes suggested by clang (but not by gcc) 2016-10-13 22:44:13 +01:00
test-main.c Add missing function attributes suggested by clang (but not by gcc) 2016-10-13 22:44:13 +01:00
test-system.c Add missing function attributes suggested by clang (but not by gcc) 2016-10-13 22:44:13 +01:00
test.c Remove trailing newlines from _dbus_warn, _dbus_warn_check_failed 2016-09-30 19:36:51 +01:00
test.h tests to embedded tests: replaced in dbus-daemon 2013-06-28 12:13:28 +01:00
utils.c Bug 21161 - Update the FSF address 2009-07-14 15:39:47 -04:00
utils.h Bug 21161 - Update the FSF address 2009-07-14 15:39:47 -04:00