initramfsでudevを走らせようと必死のパッチ
ところがギッチョンMAKEDEVでエラーが
google様へお尋ねしても中々ラチがあかん
root@p-4 /]# chroot initrd/
bash-3.2# MAKEDEV loop0
makedev: no such user: root
bash-3.2# busybox whoami
root
bash-3.2# whoami
whoami: cannot find name for user id 0
busyboxのwhoamiは騙せても、本物のwhoamiは騙せません
root@p-4 initrd]# cat etc/group
root:x:0:root
disk:x:6:root
[root@p-4 initrd]# cat etc/passwd
root:x:0:0:root:/root:/bin/bash
そうこうしているうちに、なんか分からんかったらstraceしてみいとの参考文献が
strace -o /tmp/dump whoami
cat /tmp/dump
execve("/bin/whoami", ["whoami"], [/* 30 vars */]) = 0
brk(0) = 0x8317000
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory)
open("/etc/ld.so.cache", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/lib/tls/i686/sse2/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or directory)
stat64("/lib/tls/i686/sse2", 0xbf992308) = -1 ENOENT (No such file or directory)
open("/lib/tls/i686/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or directory)
stat64("/lib/tls/i686", 0xbf992308) = -1 ENOENT (No such file or directory)
open("/lib/tls/sse2/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or directory)
stat64("/lib/tls/sse2", 0xbf992308) = -1 ENOENT (No such file or directory)
open("/lib/tls/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or directory)
stat64("/lib/tls", 0xbf992308) = -1 ENOENT (No such file or directory)
open("/lib/i686/sse2/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or directory)
stat64("/lib/i686/sse2", 0xbf992308) = -1 ENOENT (No such file or directory)
open("/lib/i686/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or directory)
stat64("/lib/i686", 0xbf992308) = -1 ENOENT (No such file or directory)
open("/lib/sse2/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or directory)
stat64("/lib/sse2", 0xbf992308) = -1 ENOENT (No such file or directory)
open("/lib/libc.so.6", O_RDONLY) = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\340_\1\0004\0\0\0"..., 512) = 512
fstat64(3, {st_mode=S_IFREG|0755, st_size=1608148, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb77f3000
mmap2(NULL, 1332676, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x110000
mprotect(0x24f000, 4096, PROT_NONE) = 0
mmap2(0x250000, 12288, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x13f) = 0x250000
mmap2(0x253000, 9668, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x253000
close(3) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb77f2000
set_thread_area({entry_number:-1 -> 6, base_addr:0xb77f26c0, limit:1048575, seg_32bit:1, contents:0, read_exec_only:0, limit_in_pages:1, seg_not_present:0, useable:1}) = 0
mprotect(0x250000, 8192, PROT_READ) = 0
mprotect(0x755000, 4096, PROT_READ) = 0
brk(0) = 0x8317000
brk(0x8338000) = 0x8338000
open("/usr/lib/locale/locale-archive", O_RDONLY|O_LARGEFILE) = -1 ENOENT (No such file or directory)
open("/usr/share/locale/locale.alias", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/lib/locale/en_US.UTF-8/LC_IDENTIFICATION", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/lib/locale/en_US.utf8/LC_IDENTIFICATION", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/lib/locale/en_US/LC_IDENTIFICATION", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/lib/locale/en.UTF-8/LC_IDENTIFICATION", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/lib/locale/en.utf8/LC_IDENTIFICATION", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/lib/locale/en/LC_IDENTIFICATION", O_RDONLY) = -1 ENOENT (No such file or directory)
geteuid32() = 0
socket(PF_FILE, SOCK_STREAM, 0) = 3
fcntl64(3, F_SETFL, O_RDWR|O_NONBLOCK) = 0
connect(3, {sa_family=AF_FILE, path="/var/run/nscd/socket"...}, 110) = -1 ENOENT (No such file or directory)
close(3) = 0
socket(PF_FILE, SOCK_STREAM, 0) = 3
fcntl64(3, F_SETFL, O_RDWR|O_NONBLOCK) = 0
connect(3, {sa_family=AF_FILE, path="/var/run/nscd/socket"...}, 110) = -1 ENOENT (No such file or directory)
close(3) = 0
open("/etc/nsswitch.conf", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/lib/libnss_compat.so.2", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/lib/tls/i686/sse2/libnss_compat.so.2", O_RDONLY) = -1 ENOENT (No such file or directory)
stat64("/usr/lib/tls/i686/sse2", 0xbf992484) = -1 ENOENT (No such file or directory)
open("/usr/lib/tls/i686/libnss_compat.so.2", O_RDONLY) = -1 ENOENT (No such file or directory)
stat64("/usr/lib/tls/i686", 0xbf992484) = -1 ENOENT (No such file or directory)
open("/usr/lib/tls/sse2/libnss_compat.so.2", O_RDONLY) = -1 ENOENT (No such file or directory)
stat64("/usr/lib/tls/sse2", 0xbf992484) = -1 ENOENT (No such file or directory)
open("/usr/lib/tls/libnss_compat.so.2", O_RDONLY) = -1 ENOENT (No such file or directory)
stat64("/usr/lib/tls", 0xbf992484) = -1 ENOENT (No such file or directory)
open("/usr/lib/i686/sse2/libnss_compat.so.2", O_RDONLY) = -1 ENOENT (No such file or directory)
stat64("/usr/lib/i686/sse2", 0xbf992484) = -1 ENOENT (No such file or directory)
open("/usr/lib/i686/libnss_compat.so.2", O_RDONLY) = -1 ENOENT (No such file or directory)
stat64("/usr/lib/i686", 0xbf992484) = -1 ENOENT (No such file or directory)
open("/usr/lib/sse2/libnss_compat.so.2", O_RDONLY) = -1 ENOENT (No such file or directory)
stat64("/usr/lib/sse2", 0xbf992484) = -1 ENOENT (No such file or directory)
open("/usr/lib/libnss_compat.so.2", O_RDONLY) = -1 ENOENT (No such file or directory)
stat64("/usr/lib", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
open("/lib/libnss_files.so.2", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/lib/libnss_files.so.2", O_RDONLY) = -1 ENOENT (No such file or directory)
write(2, "whoami: cannot find name for use"..., 39) = 39
close(1) = 0
exit_group(1) = ?
いろいろなエラーを吐いているがどうも最後の/lib/libnss_files.so.2が無いのが致命的みたいなのですこんと、コピー！
[root@p-4 /]# cp -ap /lib/libnss_files.so.2 /initrd/lib/
[root@p-4 /]# cp -ap /lib/libnss_files-2.5.so ./lib/
root@p-4 /]# chroot initrd/
bash-3.2# MAKEDEV loop0
bash-3.2#
bash-3.2# ls /dev/
loop0 null
おーと、やりましたがな
pepoと