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live-build/functions/lockfile.sh

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Adding live-helper 1.0~a1-1.
2007-09-23 08:04:46 +00:00
#!/bin/sh
Updating copyright headers for live-build.
2010-09-02 11:12:37 +00:00
## live-build(7) - System Build Scripts
amend copyright & licensing blocks Current versions of the project files are built upon versions published and licensed by Daniel Baumann, but are modified copies of those files and thus need to be marked as such per licensing requirements (afaik he did not pass along ownership / licensing rights to anyone when he left the project). We should also be careful to not be misrepresenting such modified copies as being attributed to Daniel. Adding a new copyright line referring to "The Debian Live team" should suffice for this. The authorship block in man pages has also similarly been updated. Notes: - tweaked a copy of daniel copyright lines stating 2014 instead of 2015. both of these cases were in files that i had personally introduced in some of my past merged commits that moved some code around. i don't know why they stated 2014. - binary_onie was introduced in 2018, so that has a 2018 date instead of 2016 unlike the rest. - 'efi-image' is a 3rd-party (Canonical Ltd) work that we bundle, but it has been modified by 674794a8f4d61a729d2dbd6d99385d2826138694 and 36a3ba76347ef72df1c316312ed3a26aa4b0c816 so I similarly added a debian live copyright line. - 'grub-cpmodules' is similar. it was only changed by the indentation fix of 36a3ba76347ef72df1c316312ed3a26aa4b0c816 but modification is modification, and this does help cover any possible future changes that might be made.
2020-03-11 09:07:21 -01:00
## Copyright (C) 2016-2020 The Debian Live team
Updating year in copyright notices to 2015.
2015-01-04 18:05:39 -01:00
## Copyright (C) 2006-2015 Daniel Baumann <mail@daniel-baumann.ch>
Updating copyright headers for live-build.
2010-09-02 11:12:37 +00:00
##
Updating GPL standard header in all files.
2012-07-29 23:59:00 +00:00
## This program comes with ABSOLUTELY NO WARRANTY; for details see COPYING.
Updating copyright headers for live-build.
2010-09-02 11:12:37 +00:00
## This is free software, and you are welcome to redistribute it
## under certain conditions; see COPYING for details.
Adding live-helper 1.0~a1-1.
2007-09-23 08:04:46 +00:00
locks: tidy lock acquisition Combine the check+create done in each script. (The original functions are still callable as before, but a new combined `Aquire_lockfile` function can be called instead, as now used). Note, a further simplification could be done in removing the passing of the lock filename in as a parameter since every use of the functions is with ".lock". The lock functions already have a fallback to ".build/lock" though. Checking the history, the fallback used to be for a system wide lock, which was then replaced with this config-tree specific one. As long as that is not used implicitly by 3rd-party hooks then surely we are free to change the fallback to ".lock" and further remove passing in a name as a param...? history: db5d2b0dcdae96e712661605e17bc9875e224f9f 0aa8289a3773fd8a3885090b72622c2f95ab099c Gbp-Dch: Short Closes: #952918
2015-02-05 02:30:47 -01:00
Acquire_lockfile ()
Adding live-helper 1.0~a1-1.
2007-09-23 08:04:46 +00:00
{
locks: tidy lock acquisition Combine the check+create done in each script. (The original functions are still callable as before, but a new combined `Aquire_lockfile` function can be called instead, as now used). Note, a further simplification could be done in removing the passing of the lock filename in as a parameter since every use of the functions is with ".lock". The lock functions already have a fallback to ".build/lock" though. Checking the history, the fallback used to be for a system wide lock, which was then replaced with this config-tree specific one. As long as that is not used implicitly by 3rd-party hooks then surely we are free to change the fallback to ".lock" and further remove passing in a name as a param...? history: db5d2b0dcdae96e712661605e17bc9875e224f9f 0aa8289a3773fd8a3885090b72622c2f95ab099c Gbp-Dch: Short Closes: #952918
2015-02-05 02:30:47 -01:00
local FILE="${1:-.lock}"
Check_lockfile "${FILE}"
Create_lockfile "${FILE}"
}
Adding live-helper 1.0~a1-1.
2007-09-23 08:04:46 +00:00
locks: tidy lock acquisition Combine the check+create done in each script. (The original functions are still callable as before, but a new combined `Aquire_lockfile` function can be called instead, as now used). Note, a further simplification could be done in removing the passing of the lock filename in as a parameter since every use of the functions is with ".lock". The lock functions already have a fallback to ".build/lock" though. Checking the history, the fallback used to be for a system wide lock, which was then replaced with this config-tree specific one. As long as that is not used implicitly by 3rd-party hooks then surely we are free to change the fallback to ".lock" and further remove passing in a name as a param...? history: db5d2b0dcdae96e712661605e17bc9875e224f9f 0aa8289a3773fd8a3885090b72622c2f95ab099c Gbp-Dch: Short Closes: #952918
2015-02-05 02:30:47 -01:00
Check_lockfile ()
{
local FILE="${1}"
Syncing internal lockfile functions.
2008-11-01 12:40:21 -01:00
locks: tidy lock acquisition Combine the check+create done in each script. (The original functions are still callable as before, but a new combined `Aquire_lockfile` function can be called instead, as now used). Note, a further simplification could be done in removing the passing of the lock filename in as a parameter since every use of the functions is with ".lock". The lock functions already have a fallback to ".build/lock" though. Checking the history, the fallback used to be for a system wide lock, which was then replaced with this config-tree specific one. As long as that is not used implicitly by 3rd-party hooks then surely we are free to change the fallback to ".lock" and further remove passing in a name as a param...? history: db5d2b0dcdae96e712661605e17bc9875e224f9f 0aa8289a3773fd8a3885090b72622c2f95ab099c Gbp-Dch: Short Closes: #952918
2015-02-05 02:30:47 -01:00
if [ -f "${FILE}" ]; then
Echo_error "${PROGRAM} already locked"
Adding live-helper 1.0~a1-1.
2007-09-23 08:04:46 +00:00
exit 1
fi
}
Create_lockfile ()
{
locks: tidy lock acquisition Combine the check+create done in each script. (The original functions are still callable as before, but a new combined `Aquire_lockfile` function can be called instead, as now used). Note, a further simplification could be done in removing the passing of the lock filename in as a parameter since every use of the functions is with ".lock". The lock functions already have a fallback to ".build/lock" though. Checking the history, the fallback used to be for a system wide lock, which was then replaced with this config-tree specific one. As long as that is not used implicitly by 3rd-party hooks then surely we are free to change the fallback to ".lock" and further remove passing in a name as a param...? history: db5d2b0dcdae96e712661605e17bc9875e224f9f 0aa8289a3773fd8a3885090b72622c2f95ab099c Gbp-Dch: Short Closes: #952918
2015-02-05 02:30:47 -01:00
local FILE="${1}"
Syncing internal lockfile functions.
2008-11-01 12:40:21 -01:00
locks: tidy lock acquisition Combine the check+create done in each script. (The original functions are still callable as before, but a new combined `Aquire_lockfile` function can be called instead, as now used). Note, a further simplification could be done in removing the passing of the lock filename in as a parameter since every use of the functions is with ".lock". The lock functions already have a fallback to ".build/lock" though. Checking the history, the fallback used to be for a system wide lock, which was then replaced with this config-tree specific one. As long as that is not used implicitly by 3rd-party hooks then surely we are free to change the fallback to ".lock" and further remove passing in a name as a param...? history: db5d2b0dcdae96e712661605e17bc9875e224f9f 0aa8289a3773fd8a3885090b72622c2f95ab099c Gbp-Dch: Short Closes: #952918
2015-02-05 02:30:47 -01:00
# Create lock trap
# This automatically removes the lock file in certain conditions
Updating signals in exit and lockfile traps.
2008-10-31 04:45:05 -01:00
trap 'ret=${?}; '"rm -f \"${FILE}\";"' exit ${ret}' EXIT HUP INT QUIT TERM
Adding live-helper 1.0~a1-1.
2007-09-23 08:04:46 +00:00
Removing the unmounting of pseudo filesystems from the trap call, needs some other changes before it can safely be done.
2007-11-13 10:56:48 -01:00
# Creating lock file
touch "${FILE}"
Adding live-helper 1.0~a1-1.
2007-09-23 08:04:46 +00:00
}
locks: tidy lock acquisition Combine the check+create done in each script. (The original functions are still callable as before, but a new combined `Aquire_lockfile` function can be called instead, as now used). Note, a further simplification could be done in removing the passing of the lock filename in as a parameter since every use of the functions is with ".lock". The lock functions already have a fallback to ".build/lock" though. Checking the history, the fallback used to be for a system wide lock, which was then replaced with this config-tree specific one. As long as that is not used implicitly by 3rd-party hooks then surely we are free to change the fallback to ".lock" and further remove passing in a name as a param...? history: db5d2b0dcdae96e712661605e17bc9875e224f9f 0aa8289a3773fd8a3885090b72622c2f95ab099c Gbp-Dch: Short Closes: #952918
2015-02-05 02:30:47 -01:00
Remove_lockfile ()
{
local FILE="${1:-.lock}"
rm -f "${FILE}"
}