도대체 이녀석 정체가 멀까?
도움말 상으로는 test로 연결이 되는데 흐음...
쉘 스크립트에서 사용하는 [] 랑 연관이 있는걸까?
[링크 : http://linux.die.net/man/1/test]
도움말 상으로는 test로 연결이 되는데 흐음...
쉘 스크립트에서 사용하는 [] 랑 연관이 있는걸까?
[링크 : http://linux.die.net/man/1/test]
| $ ll -al \[
-rwxr-xr-x 1 root root 42584 2010-09-22 03:33 [*
|
| $ man -k "\["
[ (1) - check file types and compare values
|
| $ file [
[: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.15, stripped
|
| % ./\[ --help BusyBox v1.14.2 (2011-01-24 14:35:28 KST) multi-call binary
Usage: [ EXPRESSION ]
Check file types, compare values etc. Return a 0/1 exit code
depending on logical value of EXPRESSION
|
| /usr/bin$ ./\[ --help
사용법: test 표현식
또는: test
또는: [ 표현식 ]
또는: [ ]
또는: [ 옵션
Exit with the status determined by EXPRESSION.
--help 이 도움말을 표시하고 끝냅니다
--version 버전 정보를 출력하고 끝냅니다
An omitted EXPRESSION defaults to false. Otherwise,
EXPRESSION is true or false and sets exit status. It is one of:
( EXPRESSION ) EXPRESSION is true
! EXPRESSION EXPRESSION is false
EXPRESSION1 -a EXPRESSION2 both EXPRESSION1 and EXPRESSION2 are true
EXPRESSION1 -o EXPRESSION2 either EXPRESSION1 or EXPRESSION2 is true
-n STRING the length of STRING is nonzero
STRING equivalent to -n STRING
-z STRING the length of STRING is zero
STRING1 = STRING2 the strings are equal
STRING1 != STRING2 the strings are not equal
INTEGER1 -eq INTEGER2 INTEGER1 is equal to INTEGER2
INTEGER1 -ge INTEGER2 INTEGER1 is greater than or equal to INTEGER2
INTEGER1 -gt INTEGER2 INTEGER1 is greater than INTEGER2
INTEGER1 -le INTEGER2 INTEGER1 is less than or equal to INTEGER2
INTEGER1 -lt INTEGER2 INTEGER1 is less than INTEGER2
INTEGER1 -ne INTEGER2 INTEGER1 is not equal to INTEGER2
FILE1 -ef FILE2 FILE1 and FILE2 have the same device and inode numbers
FILE1 -nt FILE2 FILE1 is newer (modification date) than FILE2
FILE1 -ot FILE2 FILE1 is older than FILE2
-b FILE FILE exists and is block special
-c FILE FILE exists and is character special
-d FILE FILE exists and is a directory
-e FILE FILE exists
-f FILE FILE exists and is a regular file
-g FILE FILE exists and is set-group-ID
-G FILE FILE exists and is owned by the effective group ID
-h FILE FILE exists and is a symbolic link (same as -L)
-k FILE FILE exists and has its sticky bit set
-L FILE FILE exists and is a symbolic link (same as -h)
-O FILE FILE exists and is owned by the effective user ID
-p FILE FILE exists and is a named pipe
-r FILE FILE exists and read permission is granted
-s FILE FILE exists and has a size greater than zero
-S FILE FILE exists and is a socket
-t FD file descriptor FD is opened on a terminal
-u FILE FILE exists and its set-user-ID bit is set
-w FILE FILE exists and write permission is granted
-x FILE FILE exists and execute (or search) permission is granted
Except for -h and -L, all FILE-related tests dereference symbolic links.
Beware that parentheses need to be escaped (e.g., by backslashes) for shells.
INTEGER may also be -l STRING, which evaluates to the length of STRING.
NOTE: [ honors the --help and --version options, but test does not.
test treats each of those as it treats any other nonempty STRING.
NOTE: your shell may have its own version of test and/or [, which usually supersedes
the version described here. Please refer to your shell's documentation
for details about the options it supports.
Report [ bugs to bug-coreutils@gnu.org
GNU coreutils home page: <http://www.gnu.org/software/coreutils/>
General help using GNU software: <http://www.gnu.org/gethelp/>
Report [ translation bugs to <http://translationproject.org/team/>
|
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