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tweak examples/var_service/*

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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2017-07-27 12:53:20 +02:00
parent 6bdcee8357
commit 2e01eec4d3
2 changed files with 9 additions and 7 deletions
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14
examples/var_service/README
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@ -98,7 +98,7 @@ restart) each other.
var_service/dhcp_if var_service/dhcp_if
controls a udhcpc instance which provides dhpc-assigned IP controls a udhcpc instance which provides DHCP-assigned IP
address on interface named "if". Copy/rename this directory as needed to run address on interface named "if". Copy/rename this directory as needed to run
udhcpc on other interfaces (var_service/dhcp_if/run script uses _foo suffix udhcpc on other interfaces (var_service/dhcp_if/run script uses _foo suffix
of the parent directory as interface name). of the parent directory as interface name).
@ -164,9 +164,9 @@ This is achieved very simply by having
sv o . sv o .
at the very beginning of fw/run script, not at the end. at the very beginning of fw/run script, not at the end.
Therefore, any "sv u /var/run/service/fw" command by any other Therefore, any "sv u fw" command by any other script "undoes" o(ne-shot)
script "undoes" o(ne-shot) command if fw still runs, thus command if fw still runs, thus runsv will rerun it; or start it
runsv will rerun it; or start it in a normal way if fw is not running. in a normal way if fw is not running.
This mechanism is the reason why fw is a service, not just a script. This mechanism is the reason why fw is a service, not just a script.
@ -198,7 +198,8 @@ PID TIME COMMAND
568 0:00 svlogd -tt /var/log/service/dhcp_eth0 568 0:00 svlogd -tt /var/log/service/dhcp_eth0
850 0:00 udhcpc -vv --foreground --interface=eth0 850 0:00 udhcpc -vv --foreground --interface=eth0
--pidfile=/var/service/dhcp_eth0/udhcpc.pid --pidfile=/var/service/dhcp_eth0/udhcpc.pid
--script=/var/service/dhcp_eth0/dhcp_handler -x hostname bbox --script=/var/service/dhcp_eth0/dhcp_handler
-x hostname bbox
563 0:00 runsv ntpd 563 0:00 runsv ntpd
573 0:01 svlogd -tt /var/log/service/ntpd 573 0:01 svlogd -tt /var/log/service/ntpd
845 0:00 busybox ntpd -dddnNl -S ./ntp.script -p 10.x.x.x -p 10.x.x.x 845 0:00 busybox ntpd -dddnNl -S ./ntp.script -p 10.x.x.x -p 10.x.x.x
@ -233,4 +234,5 @@ PID TIME COMMAND
622 0:00 busybox httpd -p80 -vvv -f -h /home/httpd_root 622 0:00 busybox httpd -p80 -vvv -f -h /home/httpd_root
577 0:00 runsv supplicant_wlan0 577 0:00 runsv supplicant_wlan0
627 0:00 svlogd -tt /var/log/service/supplicant_wlan0 627 0:00 svlogd -tt /var/log/service/supplicant_wlan0
638 0:03 wpa_supplicant -i wlan0 -c /var/service/supplicant_wlan0/wpa_supplicant.conf -d 638 0:03 wpa_supplicant -i wlan0
-c /var/service/supplicant_wlan0/wpa_supplicant.conf -d

2
examples/var_service/README_distro_proposal.txt
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@ -90,9 +90,9 @@ There are several reimplementations of daemontools:
(busybox has it included) (busybox has it included)
- s6: by Laurent Bercot, http://skarnet.org/software/s6/ - s6: by Laurent Bercot, http://skarnet.org/software/s6/
It is not required that a specific clone should be used. Let evolution work. It is not required that a specific clone should be used. Let evolution work.
Terminology Terminology
daemon: any long running background program. Common examples are sshd, getty, daemon: any long running background program. Common examples are sshd, getty,