core: add options to customize commands on system signals, quit by default on SIGHUP when not running headless (closes #1595)

New options to customize behavior on signals received, with the default
behavior:

- weechat.signal.sighup: quit in normal mode, reload config in headless
- weechat.signal.sigquit: quit
- weechat.signal.sigterm: quit
- weechat.signal.sigusr1: no command executed by default
- weechat.signal.sigusr2: no command executed by default

The signals SIGUSR1 and SIGUSR2 are introduced by this commit, so it's now
possible to run commands when they are received.

The SIGHUP signal makes now WeeChat quit, it was the behavior before version
2.9 of WeeChat (see commit de1e61f7cd50cbd1a99777fe6611642a51abf5f6).

1 files changed, 30 insertions, 0 deletions

diff --git a/doc/en/includes/autogen_user_options.en.adoc b/doc/en/includes/autogen_user_options.en.adoc
index 41ff189ec..41a23e50e 100644
--- a/doc/en/includes/autogen_user_options.en.adoc
+++ b/doc/en/includes/autogen_user_options.en.adoc
@@ -1308,6 +1308,36 @@
 ** values: on, off
 ** default value: `+on+`
 
+* [[option_weechat.signal.sighup]] *weechat.signal.sighup*
+** description: pass:none[command to execute when the signal is received, multiple commands can be separated by semicolons (note: content is evaluated, see /help eval)]
+** type: string
+** values: any string
+** default value: `+"${if:${info:weechat_headless}?/reload:/quit -yes}"+`
+
+* [[option_weechat.signal.sigquit]] *weechat.signal.sigquit*
+** description: pass:none[command to execute when the signal is received, multiple commands can be separated by semicolons (note: content is evaluated, see /help eval)]
+** type: string
+** values: any string
+** default value: `+"/quit -yes"+`
+
+* [[option_weechat.signal.sigterm]] *weechat.signal.sigterm*
+** description: pass:none[command to execute when the signal is received, multiple commands can be separated by semicolons (note: content is evaluated, see /help eval)]
+** type: string
+** values: any string
+** default value: `+"/quit -yes"+`
+
+* [[option_weechat.signal.sigusr1]] *weechat.signal.sigusr1*
+** description: pass:none[command to execute when the signal is received, multiple commands can be separated by semicolons (note: content is evaluated, see /help eval)]
+** type: string
+** values: any string
+** default value: `+""+`
+
+* [[option_weechat.signal.sigusr2]] *weechat.signal.sigusr2*
+** description: pass:none[command to execute when the signal is received, multiple commands can be separated by semicolons (note: content is evaluated, see /help eval)]
+** type: string
+** values: any string
+** default value: `+""+`
+
 * [[option_weechat.startup.command_after_plugins]] *weechat.startup.command_after_plugins*
 ** description: pass:none[command executed when WeeChat starts, after loading plugins (note: content is evaluated, see /help eval)]
 ** type: string