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 != $something_other ] then some shells execute "[" as a program that checks this epression. Hope it helps. Saturday, June 30, 2001, 17:18:56, hpknight wrote: h> -rwxr-xr-x 2 root root 20092 Jun 2 17:05 /usr/bin/test h> looks like someone might have copied/renamed it on accident in a shell h> script. h> -hpknight h> On Sat, 30 Jun 2001, lists wrote: >> I'm not sure where to ask this question, but here it goes. >> >> I was looking in /usr/bin ans see a file named: >> >> [EMAIL PROTECTED]:/usr/bin$ ls -la [ >> -rwxr-xr-x 2 root root 20092 Jun 2 17:05 [ >> >> [EMAIL PROTECTED]:/usr/bin$ ldd [ >> libc.so.6 => /lib/libc.so.6 (0x40020000) >> /lib/ld-linux.so.2 => /lib/ld-linux.so.2 (0x40000000) >> >> [EMAIL PROTECTED]:/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 >> [EMAIL PROTECTED]:/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 <[email protected]>. >> [EMAIL PROTECTED]:/usr/bin$ >> >> >> anybody know is this a valid file, and if so, what is it? >> >> >> >> -- >> To UNSUBSCRIBE, email to [EMAIL PROTECTED] >> with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED] >> h> -- h> To UNSUBSCRIBE, email to [EMAIL PROTECTED] h> with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
