[PATCH 0/2] syslogd: filter messages by start of string and include other configs

[Alexander Vickberg]

These patches adds two features to syslogd. First patch adds the ability to
filter log messages by start of string, typically the daemon name. The second
patch adds the ability to include other configuration files using the 'include'
keyword. For example to parse the *.conf files in the folder /etc/syslog.d/ add
'include /etc/syslog.d/' to your main syslog.conf file.

Bloat check on arm thumb, Yocto dunfell toolchain:
First patch:
function                                             old     new   delta
timestamp_and_log                                    612     672     +60
syslogd_main                                        1652    1692     +40
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/0 up/down: 100/0)             Total: 100 bytes

Second patch:
function                                             old     new   delta
parse_syslogdcfg                                       -     724    +724
.rodata                                            90125   90133      +8
syslogd_main                                        1692    1126    -566
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 1/1 up/down: 732/-566)          Total: 166 bytes

Bloat check on x86-64, Ubuntu 20.04 toolchain:
First patch:
function                                             old     new   delta
syslogd_main                                        2210    2331    +121
timestamp_and_log                                    785     877     +92
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/0 up/down: 213/0)             Total: 213 bytes

Second patch:
function                                             old     new   delta
parse_syslogdcfg                                       -    1070   +1070
.rodata                                            97597   97605      +8
syslogd_main                                        2331    1451    -880
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 1/1 up/down: 1078/-880)         Total: 198 bytes

Alexander Vickberg (2):
  syslogd: add ability to filter based on start of message
  syslogd: allow to include other config files/dirs

 sysklogd/syslogd.c | 116 ++++++++++++++++++++++++++++++++-------------
 1 file changed, 84 insertions(+), 32 deletions(-)

-- 
2.25.1