linux之strings命令

strings [ -a ] [ - ] [ -o ] [ -t Format ] [ -n Number ] [ -Number ] [ file ... ]

-a --all：扫描整个文件而不是只扫描目标文件初始化和装载段
-f –print-file-name：在显示字符串前先显示文件名
-n –bytes=[number]：找到并且输出所有NUL终止符序列
- ：设置显示的最少的字符数，默认是4个字符
-t --radix={o,d,x} ：输出字符的位置，基于八进制，十进制或者十六进制
-o ：类似--radix=o
-T --target= ：指定二进制文件格式
-e --encoding={s,S,b,l,B,L} ：选择字符大小和排列顺序:s = 7-bit, S = 8-bit, {b,l} = 16-bit, {B,L} = 32-bit
@ ：读取中选项

> strings `which pwd` | more
/lib64/ld-linux-x86-64.so.2
libc.so.6
fflush
strcpy
__printf_chk
readdir
setlocale
mbrtowc
strncmp
optind
strrchr
dcgettext
closedir
fchdir
...

> cd /usr/bin && strings -f * | grep "name"

strings /lib64/libc.so.6 | grep GLIBC
GLIBC_2.2.5
GLIBC_2.2.6
GLIBC_2.3
GLIBC_2.3.2
GLIBC_2.3.3
GLIBC_2.3.4
GLIBC_2.4
GLIBC_2.5
GLIBC_2.6
GLIBC_2.7
GLIBC_2.8
GLIBC_2.9
GLIBC_2.10
GLIBC_2.11
GLIBC_2.12
GLIBC_2.13
GLIBC_2.14
GLIBC_2.15
GLIBC_2.16
GLIBC_2.17
GLIBC_PRIVATE
...

> strings -s /  ls | more
/lib64/ld-linux-x86-64.so.2/    
...
$8H/T$@H/D$@H/D$@H/=u|!/D$@H9/D$8t      /D$@H/=^y!/=]y!/=Hy!/=+y!/=/y!/G(H;G0/5 s!/-Is!/D$P??/D$@H/D$PL/5|u!/D$8H/D$@H/D$8H/L$$H/L$$L/D$(H/D$@I/D$@H/-Vj!/t$81/=9r!/=P_!/>v|<?/$A\A]A^/<=tJ/[]A\A]/=~w!/5{w!/=lw!/=!w!/AWAVD/ATUSH/=&v!/[]A\A]A^A_/ATH9/G(H;G0sgH/W(H;W0s/[]A\/ATSH/[A\A]A^A_]/AUATU
SH/HcN0/-,^!/G(H;G0s%H/[]A\A]/X[]A\A]/O(H;O0sMH/=:n!/[]A\/O@H9N@H/NxH9OxH/ |&)/OhI9IhI/NXH9OXH/=wi!/G(H;G0s/=Lh!/=[h!/=^h!/t|Hc/AUATH9/5le!/%h[!/-~e!/[]A\A]A^/UUUUUUU/ATUS/[]A\/[]A\/AWAVAUATL/[]A\A]A^A_/=Qa!/=$a!/D$ H/D$(H/D$0H/D$8H/D$@H/D$HH/D$PH/D$XH/D$`H/D$hH/D$pH/D$xH/='`!/=q`!/AWAVAUI/A
TUH/-o^!/       tJ=/=C^!/=M]!/H9S /H9K /[]A\A]A^A_/=}Z!

> strings -t d ls | more
    568 /lib64/ld-linux-x86-64.so.2
    648         _k+
   3817 libselinux.so.1
   3833 __gmon_start__
   3848 _init
   3854 fgetfilecon
   3866 freecon
   3874 lgetfilecon
   3886 _fini
   3892 libcap.so.2
   3904 cap_to_text
   3916 cap_free
   3925 cap_get_file
   3938 libacl.so.1
   3950 acl_get_entry
   3964 acl_get_tag_type
   3981 acl_extended_file
   3999 libc.so.6