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Emulate the sysctl -p flag from Linux on OpenBSD.
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| #!/bin/sh | |
| # Emulate the sysctl -p flag from Linux. To use it as the default sysctl | |
| # command, name it sysctl and place it in your path before /sbin. | |
| # The functions stripcom, update_limit, and sysctl_conf are copied from /etc/rc | |
| # from an OpenBSD 6.1-current snapshot. Replace them with the definitions from | |
| # your own /etc/rc to be sure you get the correct behavior. You MUST then | |
| # modify sysctl_conf in two ways: | |
| # | |
| # * change the reference to /etc/sysctl.conf to "$1" so the function can be | |
| # used on arbitrary files | |
| # * change the call to sysctl to /sbin/sysctl so this script won't call itself | |
| # recursively | |
| # BEGIN COPIED FROM /etc/rc | |
| # Turn off Strict Bourne shell. | |
| set +o sh | |
| # Strip in- and whole-line comments from a file. | |
| # Strip leading and trailing whitespace if IFS is set. | |
| # Usage: stripcom /path/to/file | |
| stripcom() { | |
| local _file=$1 _line | |
| [[ -s $_file ]] || return | |
| while read _line ; do | |
| _line=${_line%%#*} | |
| [[ -n $_line ]] && print -r -- "$_line" | |
| done <$_file | |
| } | |
| # Update resource limits based on login.conf settings. | |
| # Usage: update_limit -flag capability | |
| update_limit() { | |
| local _flag=$1 # ulimit flag | |
| local _cap=$2 _val # login.conf capability and its value | |
| local _suffix | |
| for _suffix in {,-max,-cur}; do | |
| _val=$(getcap -f /etc/login.conf -s ${_cap}${_suffix} daemon 2>/dev/null) | |
| [[ -n $_val ]] || continue | |
| [[ $_val == infinity ]] && _val=unlimited | |
| case $_suffix in | |
| -cur) ulimit -S $_flag $_val | |
| ;; | |
| -max) ulimit -H $_flag $_val | |
| ;; | |
| *) ulimit $_flag $_val | |
| return | |
| ;; | |
| esac | |
| done | |
| } | |
| # Apply sysctl.conf(5) settings. | |
| sysctl_conf() { | |
| stripcom "$1" | # was: stripcom /etc/sysctl.conf | |
| while read _line; do | |
| /sbin/sysctl "$_line" # was: sysctl "$_line" | |
| case $_line in | |
| kern.maxproc=*) | |
| update_limit -p maxproc;; | |
| kern.maxfiles=*) | |
| update_limit -n openfiles;; | |
| esac | |
| done | |
| } | |
| # END COPIED FROM /etc/rc | |
| # Pretend to be Linux sysctl by handling -p flag. | |
| if [[ $# -gt 0 && "$1" = "-p" ]]; then | |
| shift | |
| if [[ $# -eq 0 ]]; then | |
| sysctl_conf /etc/sysctl.conf | |
| else | |
| for sysctls_file in "$@"; do | |
| if [[ -f "$sysctls_file" ]]; then | |
| sysctl_conf "$sysctls_file" | |
| else | |
| echo "sysctl: cannot open \"$sysctls_file\": No such file or directory" >&2 | |
| fi | |
| done | |
| fi | |
| else | |
| exec /sbin/sysctl "$@" | |
| fi |
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