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Try to set file descriptor limit to its maximum and show info on startup

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The number of possible parallel connections is limited by the process
file descriptor limit (among other things). Therefore try to upgrade the
current "soft" limit to its "hard" maximum (but limit it to 100000), and
show an information or even warning, wenn still less than the configured
"MaxConnections" setting.

Please note that ngIRCd and its linked libraries (like PAM) need file
descriptors not only for incoming and outgoing IRC connections, but for
reading files and inter-process communication, too! Therefore the actual
connection limit is _less_ than the file descriptor limit!

This introduces the new MAX_FD_LIMIT (100000) #define.
This commit is contained in:
Alexander Barton
2024-03-28 10:16:44 +01:00
parent 24e822cff2
commit 3497925000
4 changed files with 57 additions and 1 deletions
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contrib/ngircd.logcheck
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@@ -12,6 +12,7 @@
^\w{3} [ :0-9]{11} [._[:alnum:]-]+ ngircd\[[0-9]+\]: Deleted ".*" \(".*"\) from G-Line list \(expired\)\.$
^\w{3} [ :0-9]{11} [._[:alnum:]-]+ ngircd\[[0-9]+\]: Enabled link compression \(zlib\) on connection [0-9]+\.$
^\w{3} [ :0-9]{11} [._[:alnum:]-]+ ngircd\[[0-9]+\]: Establishing connection for ".*" to ".*:[0-9]+" \(.*\), socket [0-9]+ \.\.\.$
^\w{3} [ :0-9]{11} [._[:alnum:]-]+ ngircd\[[0-9]+\]: File descriptor limit is [0-9]+; "MaxConnections" is (not set|set to [0-9]+)\.$
^\w{3} [ :0-9]{11} [._[:alnum:]-]+ ngircd\[[0-9]+\]: Got (valid server|unchecked peer) certificate: .*\.$
^\w{3} [ :0-9]{11} [._[:alnum:]-]+ ngircd\[[0-9]+\]: Got signal "(Hangup|Terminated)" \.\.\.$
^\w{3} [ :0-9]{11} [._[:alnum:]-]+ ngircd\[[0-9]+\]: Got valid OPER for ".*" from ".*", user is an IRC operator now\.$