Re[2]: Wierd file name?
Yes, it is valid file name.
In any case it exists in FreeBSD too.
this file is useful for shell programming.
when you program in shell like
if [ $something != $something_other ]
then some shells execute "[" as a program that checks this epression.
Hope it helps.
Saturday, June 30, 2001, 17:18:56, hpknight wrote:
h> -rwxr-xr-x 2 root root 20092 Jun 2 17:05 /usr/bin/test
h> looks like someone might have copied/renamed it on accident in a shell
h> script.
h> -hpknight
h> On Sat, 30 Jun 2001, lists wrote:
>> I'm not sure where to ask this question, but here it goes.
>>
>> I was looking in /usr/bin ans see a file named:
>>
>> jeff@raptor:/usr/bin$ ls -la [
>> -rwxr-xr-x 2 root root 20092 Jun 2 17:05 [
>>
>> jeff@raptor:/usr/bin$ ldd [
>> libc.so.6 => /lib/libc.so.6 (0x40020000)
>> /lib/ld-linux.so.2 => /lib/ld-linux.so.2 (0x40000000)
>>
>> jeff@raptor:/usr/bin$ ./[ --help
>>
>> Usage: ./[ EXPRESSION
>> or: [ EXPRESSION ]
>> or: ./[ OPTION
>> Exit with the status determined by EXPRESSION.
>>
>> --help display this help and exit
>> --version output version information and exit
>>
>> 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
>> -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
>> jeff@raptor:/usr/bin$ ./[ --help
>> Usage: ./[ EXPRESSION
>> or: [ EXPRESSION ]
>> or: ./[ OPTION
>> Exit with the status determined by EXPRESSION.
>>
>> --help display this help and exit
>> --version output version information and exit
>>
>> 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
>> -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
>> -h FILE FILE exists and is a symbolic link (same as -L)
>> -G FILE FILE exists and is owned by the effective group ID
>> -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 is readable
>> -s FILE FILE exists and has a size greater than zero
>> -S FILE FILE exists and is a socket
>> -t [FD] file descriptor FD (stdout by default) is opened on a terminal
>> -u FILE FILE exists and its set-user-ID bit is set
>> -w FILE FILE exists and is writable
>> -x FILE FILE exists and is executable
>>
>> 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.
>>
>> Report bugs to <bug-sh-utils@gnu.org>.
>> jeff@raptor:/usr/bin$
>>
>>
>> anybody know is this a valid file, and if so, what is it?
>>
>>
>>
>> --
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>>
h> --
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