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Use /share/sysinstall/hooks to keep of whether hooks have run.

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This commit is contained in:
Jonas 'Sortie' Termansen 2018-07-24 00:52:26 +02:00
parent 4baa7b5409
commit 918160450f
2 changed files with 44 additions and 14 deletions
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0
share/sysinstall/hooks/sortix-1.1-random-seed Normal file
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58
sysinstall/hooks.c
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2016, 2017 Jonas 'Sortie' Termansen.
* Copyright (c) 2016, 2017, 2018 Jonas 'Sortie' Termansen.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
@ -29,21 +29,41 @@
#include "hooks.h"
#include "release.h"
// Files in the /share/sysinstall/hooks directory are added whenever an
// incompatible operating system change is made that needs additional actions.
// These files are part of the system manifest and their lack can be tested
// in upgrade_prepare, but not in upgrade_finalize (as they would have been
// installed there). If a file is lacking, then a hook should be run taking
// the needed action. For instance, if /etc/foo becomes the different /etc/bar,
// then /share/sysinstall/hooks/osname-x.y-bar would be made, and if it is
// absent then upgrade_prepare converts /etc/foo to /etc/bar. The file is then
// made when the system manifest is upgraded.
//
// Hooks are meant to run once. However, they must handle if the upgrade fails
// between the hook running and the hook file being installed when the system
// manifest is installed.
//
// If this system is used, follow the instructions in following-development(7)
// and add an entry in that manual page about the change.
__attribute__((used))
static bool hook_needs_to_be_run(const char* target_prefix, const char* hook)
{
char* path;
if ( asprintf(&path, "%sshare/sysinstall/hooks/%s",
target_prefix, hook) < 0 )
{
warn("asprintf");
_exit(2);
}
bool result = access_or_die(path, F_OK) < 0;
free(path);
return result;
}
void upgrade_prepare(const struct release* old_release,
const struct release* new_release,
const char* source_prefix,
const char* target_prefix)
{
(void) old_release;
(void) new_release;
(void) source_prefix;
(void) target_prefix;
}
void upgrade_finalize(const struct release* old_release,
const struct release* new_release,
const char* source_prefix,
const char* target_prefix)
{
(void) old_release;
(void) new_release;
@ -51,8 +71,7 @@ void upgrade_finalize(const struct release* old_release,
(void) target_prefix;
// TODO: After releasing Sortix 1.1, remove this compatibility.
if ( version_compare(old_release->version_major, old_release->version_minor,
old_release->version_dev, 1, 1, false) < 0 ) // < 1.1
if ( hook_needs_to_be_run(target_prefix, "sortix-1.1-random-seed") )
{
char* random_seed_path;
if ( asprintf(&random_seed_path, "%sboot/random.seed", target_prefix) < 0 )
@ -68,3 +87,14 @@ void upgrade_finalize(const struct release* old_release,
free(random_seed_path);
}
}
void upgrade_finalize(const struct release* old_release,
const struct release* new_release,
const char* source_prefix,
const char* target_prefix)
{
(void) old_release;
(void) new_release;
(void) source_prefix;
(void) target_prefix;
}