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feat(recovery): strengthen debugging capabilities of preinit

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Signed-off-by: Raito Bezarius <masterancpp@gmail.com>
This commit is contained in:
Raito Bezarius 2024-09-07 23:28:50 +02:00
parent 73ea02b982
commit 9fcfae3eae
1 changed files with 38 additions and 1 deletions
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39
pkgs/preinit/preinit.c
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@ -4,9 +4,13 @@
#include <fcntl.h>
#include <sys/mount.h>
#include <sys/wait.h>
#include <sys/stat.h>
#include <string.h>
#include <stdint.h>
#include <errno.h>
#include <stdio.h>
#include <dirent.h>
#include <asm/setup.h> /* for COMMAND_LINE_SIZE */
@ -44,6 +48,25 @@ static int fork_exec(char * command, char *args[])
return execve(command, args, NULL);
}
static void debug_listdir(const char * path)
{
DIR *mydir;
struct dirent *myfile;
struct stat mystat;
char buf[512];
mydir = opendir(path);
while((myfile = readdir(mydir)) != NULL)
{
sprintf(buf, "%s/%s", path, myfile->d_name);
stat(buf, &mystat);
printf("%llu", mystat.st_size);
printf(" %s\n", myfile->d_name);
}
closedir(mydir);
}
char banner[] = "Running pre-init...\n";
char buf[COMMAND_LINE_SIZE];
@ -108,7 +131,12 @@ int main(int argc, char *argv[], char *envp[])
"bind", MS_BIND, NULL));
char *exec_args[] = { "activate", "/target", NULL };
AVER(fork_exec("/target/persist/activate", exec_args));
if (fork_exec("/target/persist/activate", exec_args) < 0) {
ERR("failed to activate the system\n");
pr_u32(errno); ERR ( " - "); ERR(strerror(errno)); ERR("\n");
goto failsafe;
}
AVER(chdir("/target"));
AVER(mount("/target", "/", "bind", MS_BIND | MS_REC, NULL));
@ -120,13 +148,22 @@ int main(int argc, char *argv[], char *envp[])
AVER(execve("/persist/init", argv, envp));
}
failsafe:
debug_listdir("/");
debug_listdir("/target");
ERR("failed to mount the rootfs\n");
ERR("final stand using the failsafe initialization method\n");
ERR("the boot process is manual from now on\n");
argv[0] = "init";
argv[1] = NULL;
// Attempt to unmount the /target mount-bind.
AVER(umount("/target"));
AVER(execve("/failsafe-init", argv, envp));
debug_listdir("/");
debug_listdir("/target");
die();
}