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sortix--sortix/sysinstall/sysmerge.c
Jonas 'Sortie' Termansen 478468a04e Fix sysmerge delayed upgrade bricking system.
It ran update-initrd before removing /sysmerge, which caused the initrd to
attempt another upgrade, but there was no image in /sysmerge.
2016-02-21 22:09:03 +01:00

260 lines
7.2 KiB
C

/*******************************************************************************
Copyright(C) Jonas 'Sortie' Termansen 2016.
This program is free software: you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the Free
Software Foundation, either version 3 of the License, or (at your option)
any later version.
This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details.
You should have received a copy of the GNU General Public License along with
this program. If not, see <http://www.gnu.org/licenses/>.
sysmerge.c
Upgrade current operating system from a sysroot.
*******************************************************************************/
#include <sys/types.h>
#include <err.h>
#include <fcntl.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "conf.h"
#include "execute.h"
#include "fileops.h"
#include "manifest.h"
#include "release.h"
static void compact_arguments(int* argc, char*** argv)
{
for ( int i = 0; i < *argc; i++ )
{
while ( i < *argc && !(*argv)[i] )
{
for ( int n = i; n < *argc; n++ )
(*argv)[n] = (*argv)[n+1];
(*argc)--;
}
}
}
static bool has_pending_upgrade(void)
{
return access_or_die("/boot/sortix.bin.sysmerge.orig", F_OK) == 0 ||
access_or_die("/boot/sortix.initrd.sysmerge.orig", F_OK) == 0 ||
access_or_die("/sysmerge", F_OK) == 0;
}
static void help(FILE* fp, const char* argv0)
{
fprintf(fp, "Usage: %s [OPTION]... SOURCE\n", argv0);
fprintf(fp, "Merge the files from SOURCE onto the current system.\n");
}
static void version(FILE* fp, const char* argv0)
{
fprintf(fp, "%s (Sortix) %s\n", argv0, VERSIONSTR);
fprintf(fp, "License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.\n");
fprintf(fp, "This is free software: you are free to change and redistribute it.\n");
fprintf(fp, "There is NO WARRANTY, to the extent permitted by law.\n");
}
int main(int argc, char* argv[])
{
setvbuf(stdout, NULL, _IOLBF, 0); // Pipes.
bool cancel = false;
bool booting = false;
bool wait = false;
const char* argv0 = argv[0];
for ( int i = 1; i < argc; i++ )
{
const char* arg = argv[i];
if ( arg[0] != '-' || !arg[1] )
continue;
argv[i] = NULL;
if ( !strcmp(arg, "--") )
break;
if ( arg[1] != '-' )
{
char c;
while ( (c = *++arg) ) switch ( c )
{
case 'w': wait = true; break;
default:
fprintf(stderr, "%s: unknown option -- '%c'\n", argv0, c);
help(stderr, argv0);
exit(1);
}
}
else if ( !strcmp(arg, "--help") )
help(stdout, argv0), exit(0);
else if ( !strcmp(arg, "--version") )
version(stdout, argv0), exit(0);
else if ( !strcmp(arg, "--cancel") )
cancel = true;
else if ( !strcmp(arg, "--booting") )
booting = true;
else if ( !strcmp(arg, "--wait") )
wait = true;
else
{
fprintf(stderr, "%s: unknown option: %s\n", argv0, arg);
help(stderr, argv0);
exit(1);
}
}
compact_arguments(&argc, &argv);
const char* source;
if ( cancel )
{
source = NULL;
if ( 1 < argc )
err(2, "Unexpected extra operand `%s'", argv[2]);
}
else if ( booting )
{
source = "/sysmerge";
if ( 1 < argc )
err(2, "Unexpected extra operand `%s'", argv[2]);
}
else
{
if ( argc < 2 )
err(2, "No source operand was given");
source = argv[1];
if ( 2 < argc )
err(2, "Unexpected extra operand `%s'", argv[2]);
}
if ( booting )
{
}
else if ( has_pending_upgrade() )
{
rename("/boot/sortix.bin.sysmerge.orig", "/boot/sortix.bin");
rename("/boot/sortix.initrd.sysmerge.orig", "/boot/sortix.initrd");
execute((const char*[]) { "rm", "-rf", "/sysmerge", NULL }, "");
execute((const char*[]) { "update-initrd", NULL }, "_e");
printf("Cancelled pending system upgrade.\n");
}
else if ( cancel )
printf("No system upgrade was pending.\n");
if ( cancel )
return 0;
const char* old_release_path = "/etc/sortix-release";
struct release old_release;
if ( !os_release_load(&old_release, old_release_path, old_release_path) )
exit(2);
char* new_release_path;
if ( asprintf(&new_release_path, "%s/etc/sortix-release", source) < 0 )
err(2, "asprintf");
struct release new_release;
if ( !os_release_load(&new_release, new_release_path, new_release_path) )
exit(2);
free(new_release_path);
// TODO: Check if /etc/machine matches the current architecture.
// TODO: Check for version (skipping, downgrading).
struct conf conf;
load_upgrade_conf(&conf, "/etc/upgrade.conf");
bool can_run_old_abi = old_release.abi_major == new_release.abi_major &&
old_release.abi_minor <= new_release.abi_minor;
if ( !can_run_old_abi && !wait )
{
printf("Incompatible %lu.%lu -> %lu.%lu ABI transition, "
"delaying upgrade to next boot.\n",
old_release.abi_major, old_release.abi_major,
new_release.abi_major, new_release.abi_major);
wait = true;
}
const char* target;
if ( wait )
{
printf("Scheduling upgrade to %s on next boot using %s:\n",
new_release.pretty_name, source);
target = "/sysmerge";
if ( mkdir(target, 0755) < 0 )
err(2, "%s", target);
execute((const char*[]) { "tix-collection", "/sysmerge", "create",
NULL }, "_e");
}
else
{
printf("Upgrading to %s using %s:\n", new_release.pretty_name, source);
target = "";
}
install_manifest("system", source, target);
install_ports(source, target);
if ( wait )
{
printf(" - Scheduling upgrade on next boot...\n");
execute((const char*[]) { "cp", "/boot/sortix.bin",
"/boot/sortix.bin.sysmerge.orig" }, "_e");
execute((const char*[]) { "cp", "/boot/sortix.initrd",
"/boot/sortix.initrd.sysmerge.orig" }, "_e");
execute((const char*[]) { "cp", "/sysmerge/boot/sortix.bin",
"/boot/sortix.bin" }, "_e");
execute((const char*[]) { "/sysmerge/sbin/update-initrd", NULL }, "_e");
printf("The system will be upgraded to %s on the next boot.\n",
new_release.pretty_name);
printf("Run %s --cancel to cancel the upgrade.\n", argv[0]);
return 0;
}
if ( booting )
{
unlink("/boot/sortix.bin.sysmerge.orig");
unlink("/boot/sortix.initrd.sysmerge.orig");
execute((const char*[]) { "rm", "-rf", "/sysmerge", NULL }, "");
}
if ( !wait && access_or_die("/etc/fstab", F_OK) == 0 )
{
printf(" - Creating initrd...\n");
execute((const char*[]) { "update-initrd", NULL }, "_e");
if ( conf.grub )
{
// TODO: Figure out the root device.
//printf(" - Installing bootloader...\n");
//execute((const char*[]) { "grub-install", "/", NULL }, "_eqQ");
printf(" - Configuring bootloader...\n");
execute((const char*[]) { "update-grub", NULL }, "_eqQ");
}
else if ( access_or_die("/etc/grub.d/10_sortix", F_OK) == 0 )
{
printf(" - Creating bootloader fragment...\n");
execute((const char*[]) { "/etc/grub.d/10_sortix", NULL }, "_eq");
}
}
printf("Successfully upgraded to %s.\n", new_release.pretty_name);
return 0;
}