CushionTheBlow (구 BluemoonSoft)

FTP에 접속 시 다음과 같은 메시지와 함께

디렉토리 내용이 보이지 않는 문제가 발생할 수 있다.

226 Transfer done (but failed to open directory).

SELinux 설정 문제로 발생할 수 있다.

[root@viewlinx ~]# setsebool -P ftp_home_dir=1
[root@viewlinx ~]#

SELinux 관련 문제 발생 시 다음 프로그램을 활용하면 편리하다.

Applications -> System Tools -> SELinux Troubleshooter

setroubleshooter browser 다이얼로그 내에 활성화된 문제 리스트와

선택 시 세부 정보를 확인할 수 있다.

[root@jmlim modules]# strings hello-4.ko
<6>Hello, world 4
<6>Goodbye, world 4
license=GPL
author=Jungmuk Lim <jmlim@corecess.com>
description=A sample driver
vermagic=2.6.25 mod_unload 686
depends=
lstruct_module
printk
hello_4
[root@jmlim modules]#

objdump 명령으로도 볼 수 있다는데, 알고 계신 분은 글을 남겨주시면 감사하겠습니다.

[jmlim@jmlim linux-2.6.25]$ make tags
  MAKE   tags
[jmlim@jmlim linux-2.6.25]$

태그를 달면 함수의 정의를 손쉽게 찾을 수 있다.

[jmlim@jmlim linux-2.6.25]$ grep -inr MODULE_AUTHOR *
arch/x86/mach-rdc321x/wdt.c:272:MODULE_AUTHOR("Florian Fainelli <florian@openwrt.org>");
arch/x86/kvm/svm.c:30:MODULE_AUTHOR("Qumranet");
arch/x86/kvm/vmx.c:34:MODULE_AUTHOR("Qumranet");
...
[jmlim@jmlim linux-2.6.25]$

[root@jmlim modules]# modinfo hello-1.ko
filename:       hello-1.ko
vermagic:       2.6.25 mod_unload 686
depends:       
[root@jmlim modules]#

[root@jmlim linux-2.6.25]# uname -r
2.6.25
[root@jmlim linux-2.6.25]#

[root@jmlim ~]# strace modprobe msdos
execve("/sbin/modprobe", ["modprobe", "msdos"], [/* 20 vars */]) = 0
uname({sys="Linux", node="jmlim.corecess.com", ...}) = 0
brk(0)                                  = 0x805a000
access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or directory)
open("/etc/ld.so.cache", O_RDONLY)      = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=130967, ...}) = 0
old_mmap(NULL, 130967, PROT_READ, MAP_PRIVATE, 3, 0) = 0xb7fd4000
close(3)                                = 0
open("/lib/tls/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 \177\253"..., 512) = 512
fstat64(3, {st_mode=S_IFREG|0755, st_size=1512400, ...}) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb7fd3000
old_mmap(0xaa3000, 1207532, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xaa3000
old_mmap(0xbc4000, 16384, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x120000) = 0xbc4000
old_mmap(0xbc8000, 7404, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xbc8000
close(3)                                = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb7fd2000
mprotect(0xbc4000, 8192, PROT_READ)     = 0
mprotect(0xa9b000, 4096, PROT_READ)     = 0
set_thread_area({entry_number:-1 -> 6, base_addr:0xb7fd26c0, limit:1048575, seg_32bit:1, contents:0, read_exec_only:0, limit_in_pages:1, seg_not_present:0, useable:1}) = 0
munmap(0xb7fd4000, 130967)              = 0
uname({sys="Linux", node="jmlim.corecess.com", ...}) = 0
fstat64(2, {st_mode=S_IFCHR|0620, st_rdev=makedev(136, 1), ...}) = 0
brk(0)                                  = 0x805a000
brk(0x807b000)                          = 0x807b000
open("/etc/modprobe.conf", O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_DIRECTORY) = -1 ENOTDIR (Not a directory)
open("/etc/modprobe.conf.dist", O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_DIRECTORY) = -1 ENOTDIR (Not a directory)
open("/etc/modprobe.conf.dist", O_RDONLY) = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=5754, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb7ff3000
read(3, "# default modutils aliases\nalias"..., 4096) = 4096
read(3, "l net-pf-3 /bin/true\ninstall net"..., 4096) = 1658
read(3, "", 4096)                       = 0
close(3)                                = 0
munmap(0xb7ff3000, 4096)                = 0
open("/etc/modprobe.conf", O_RDONLY)    = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=401, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb7ff3000
read(3, "alias eth0 via-rhine\nalias scsi_"..., 4096) = 401
read(3, "", 4096)                       = 0
close(3)                                = 0
munmap(0xb7ff3000, 4096)                = 0
open("/lib/modules/2.6.25/modules.dep", O_RDONLY) = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=151468, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb7ff3000
read(3, "/lib/modules/2.6.25/kernel/lib/c"..., 4096) = 4096
read(3, "odules/2.6.25/kernel/sound/core/"..., 4096) = 4096
read(3, "l/sound/core/snd-timer.ko /lib/m"..., 4096) = 4096
read(3, "ules/2.6.25/kernel/sound/core/sn"..., 4096) = 4096
read(3, "/snd-trident.ko: /lib/modules/2."..., 4096) = 4096
read(3, "modules/2.6.25/kernel/sound/core"..., 4096) = 4096
read(3, "odules/2.6.25/kernel/sound/core/"..., 4096) = 4096
read(3, "nd/isa/cs423x/snd-cs4236-lib.ko:"..., 4096) = 4096
read(3, ".6.25/kernel/sound/core/snd-page"..., 4096) = 4096
read(3, ".25/kernel/sound/core/seq/snd-se"..., 4096) = 4096
read(3, "p.ko /lib/modules/2.6.25/kernel/"..., 4096) = 4096
read(3, ".6.25/kernel/sound/core/seq/snd-"..., 4096) = 4096
read(3, ".6.25/kernel/sound/core/snd-rawm"..., 4096) = 4096
read(3, "filter/ebt_redirect.ko: /lib/mod"..., 4096) = 4096
read(3, "p.ko: /lib/modules/2.6.25/kernel"..., 4096) = 4096
read(3, "ipv4/ipvs/ip_vs_wrr.ko: /lib/mod"..., 4096) = 4096
read(3, "m.ko: /lib/modules/2.6.25/kernel"..., 4096) = 4096
read(3, "ernel/drivers/mtd/chips/map_ram."..., 4096) = 4096
read(3, "e.ko\n/lib/modules/2.6.25/kernel/"..., 4096) = 4096
read(3, "ry.ko:\n/lib/modules/2.6.25/kerne"..., 4096) = 4096
read(3, "/modules/2.6.25/kernel/drivers/u"..., 4096) = 4096
read(3, "/lib/modules/2.6.25/kernel/drive"..., 4096) = 4096
read(3, "b/modules/2.6.25/kernel/drivers/"..., 4096) = 4096
read(3, "1004x.ko /lib/modules/2.6.25/ker"..., 4096) = 4096
read(3, "les/2.6.25/kernel/drivers/i2c/al"..., 4096) = 4096
read(3, "tl32.ko:\n/lib/modules/2.6.25/ker"..., 4096) = 4096
read(3, ".6.25/kernel/drivers/media/video"..., 4096) = 4096
read(3, "a7146_vv.ko /lib/modules/2.6.25/"..., 4096) = 4096
read(3, "6a.ko: /lib/modules/2.6.25/kerne"..., 4096) = 4096
read(3, ".6.25/kernel/drivers/input/joyst"..., 4096) = 4096
read(3, "scsi/aha1542.ko: /lib/modules/2."..., 4096) = 4096
read(3, "ules/2.6.25/kernel/drivers/net/i"..., 4096) = 4096
read(3, "ernel/drivers/net/appletalk/ltpc"..., 4096) = 4096
read(3, "m/atmtcp.ko: /lib/modules/2.6.25"..., 4096) = 4096
read(3, "s/2.6.25/kernel/drivers/i2c/i2c-"..., 4096) = 4096
read(3, "vers/isdn/capi/kernelcapi.ko\n/li"..., 4096) = 4096
read(3, "_blkcipher.ko\n/lib/modules/2.6.2"..., 4096) = 4012
close(3)                                = 0
munmap(0xb7ff3000, 4096)                = 0
open("/lib/modules/2.6.25/kernel/fs/fat/fat.ko", O_RDWR) = 3
fcntl64(3, F_SETLKW, {type=F_WRLCK, whence=SEEK_SET, start=0, len=1}) = 0
open("/proc/modules", O_RDONLY)         = 4
fstat64(4, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb7ff3000
read(4, "parport_pc 27368 1 - Live 0xf8a1"..., 1024) = 1024
read(4, "art, Live 0xf888d000\nsnd_seq_dev"..., 1024) = 501
read(4, "", 1024)                       = 0
close(4)                                = 0
munmap(0xb7ff3000, 4096)                = 0
fcntl64(3, F_GETFL)                     = 0x2 (flags O_RDWR)
fstat64(3, {st_mode=S_IFREG|0644, st_size=555218, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb7ff3000
_llseek(3, 0, [0], SEEK_CUR)            = 0
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\1\0\3\0\1\0\0\0\0\0\0\0"..., 16384) = 16384
read(3, "\366@0\1\17\205#\1\0\0\17\267^j\201\347\347\0\0\0\213N"..., 16384) = 16384
read(3, "P\200bmmpage_readpage\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 32768) = 32768
mmap2(NULL, 135168, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb7fb1000
read(3, "\0\34/\242\1\26\243\35\0\0/\243\1!\0\0\0\2#\0\26b\24\0"..., 65536) = 65536
mremap(0xb7fb1000, 135168, 266240, MREMAP_MAYMOVE) = 0xb7f70000
read(3, "\0!\252\0\0<\\L\v|\207\0\0\\NX\0\0\0\2#\0\v\241\227\0\0"..., 131072) = 131072
mremap(0xb7f70000, 266240, 528384, MREMAP_MAYMOVE) = 0xb7eef000
read(3, "#\24\nu\0009\320\226J\0\0\2#\30\0\7\4\301J\0\0\t)L\0\0"..., 262144) = 262144
mremap(0xb7eef000, 528384, 1052672, MREMAP_MAYMOVE) = 0xb7dee000
read(3, "\207\31\3\0\1\'\0\0\224\31\3\0\1\21\0\0\236\31\3\0\1\'"..., 524288) = 30930
read(3, "", 491520)                     = 0
read(3, "", 491520)                     = 0
init_module("ELF", 0x878d2)         = 0
munmap(0xb7dee000, 1052672)             = 0
close(3)                                = 0
open("/lib/modules/2.6.25/kernel/fs/msdos/msdos.ko", O_RDWR) = 3
fcntl64(3, F_SETLKW, {type=F_WRLCK, whence=SEEK_SET, start=0, len=1}) = 0
open("/proc/modules", O_RDONLY)         = 4
fstat64(4, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb7fd1000
read(4, "fat 49336 0 - Live 0xf89ee000\npa"..., 1024) = 1024
read(4, "d_rawmidi 23364 1 snd_mpu401_uar"..., 1024) = 531
read(4, "", 1024)                       = 0
close(4)                                = 0
munmap(0xb7fd1000, 4096)                = 0
fcntl64(3, F_GETFL)                     = 0x2 (flags O_RDWR)
fstat64(3, {st_mode=S_IFREG|0644, st_size=97926, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb7fd1000
_llseek(3, 0, [0], SEEK_CUR)            = 0
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\1\0\3\0\1\0\0\0\0\0\0\0"..., 16384) = 16384
read(3, "N\222$\0\0\2#\4\0$m$\0\0\1\30\2\0\0\4\10\37\0\0\4\16\37"..., 16384) = 16384
read(3, "\0\0D\25Rd\0\0\7\4<d\0\0\t\235d\0\0u4\0\0\24?\205\vi5\0"..., 32768) = 32768
mmap2(NULL, 135168, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb7fb0000
read(3, "o_list\0rb_node\0num_symtab\0st_nam"..., 65536) = 32390
read(3, "", 32768)                      = 0
read(3, "", 32768)                      = 0
init_module("ELF", 0x17e86)         = 0
munmap(0xb7fb0000, 135168)              = 0
close(3)                                = 0
exit_group(0)                           = ?
[root@jmlim ~]#

[root@jmlim ~]# insmod /lib/modules/2.6.25/kernel/fs/msdos/msdos.ko
insmod: error inserting '/lib/modules/2.6.25/kernel/fs/msdos/msdos.ko': -1 Unknown symbol in module
[root@jmlim ~]# insmod /lib/modules/2.6.25/kernel/fs/fat/fat.ko
[root@jmlim ~]# insmod /lib/modules/2.6.25/kernel/fs/msdos/msdos.ko
[root@jmlim ~]# rmmod fat
ERROR: Module fat is in use by msdos
[root@jmlim ~]# rmmod msdos
[root@jmlim ~]# rmmod fat
[root@jmlim ~]# insmod /lib/modules/2.6.25/kernel/fs/msdos/msdos.ko
insmod: error inserting '/lib/modules/2.6.25/kernel/fs/msdos/msdos.ko': -1 Unknown symbol in module
[root@jmlim ~]# modprobe msdos
[root@jmlim ~]#

멍청한 insmod와 똑똑한 modprobe.

[root@jmlim ~]# cat /lib/modules/2.6.25/modules.dep
/lib/modules/2.6.25/kernel/lib/crc-ccitt.ko:
/lib/modules/2.6.25/kernel/lib/libcrc32c.ko:
/lib/modules/2.6.25/kernel/lib/zlib_deflate/zlib_deflate.ko:
/lib/modules/2.6.25/kernel/sound/ac97_bus.ko:
/lib/modules/2.6.25/kernel/sound/soundcore.ko:
...
[root@jmlim ~]#