09-09-2009
You don't say what operating system or shell this is using. I'm going to guess some distro of Linux and the Bash shell...
Quote:
Originally Posted by
Amit Sura
get below response 'Bad : modifier in $ (").'
Check the filenames that your wildcard expands to. It's likely there's a character in there that when expanded in the gdb command line is giving the shell some grief.
Some rules for typing in shell commands:
1. Always put double quotes around your dollar-sign variables. (It's only wrong about 3 times in 1,000 so you've got a 99.7% chance of being right.
)
2. Use
$(...) instead of
`...`. (Won't matter in this particular case, but it's a good idea for a variety of reasons.)
3. Don't use a bunch of pipes when they're not necessary. (In this case using gdb is
way overkill as the file command will likely give you the right data. Using a command like
set -- $(file "$i") eliminates all of the pipes and only requires a single fork/exec because the set command is builtin to the shell.)
Otherwise I agree with TonyFullerMalv; you need to go back to basics and test out each piece of your command line. In particular, you need to know what data is going into the loop (such as the filenames).
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RBASH(1) General Commands Manual RBASH(1)
NAME
rbash - restricted bash, see bash(1)
RESTRICTED SHELL
If bash is started with the name rbash, or the -r option is supplied at invocation, the shell becomes restricted. A restricted shell is
used to set up an environment more controlled than the standard shell. It behaves identically to bash with the exception that the follow-
ing are disallowed or not performed:
o changing directories with cd
o setting or unsetting the values of SHELL, PATH, ENV, or BASH_ENV
o specifying command names containing /
o specifying a file name containing a / as an argument to the . builtin command
o specifying a filename containing a slash as an argument to the -p option to the hash builtin command
o importing function definitions from the shell environment at startup
o parsing the value of SHELLOPTS from the shell environment at startup
o redirecting output using the >, >|, <>, >&, &>, and >> redirection operators
o using the exec builtin command to replace the shell with another command
o adding or deleting builtin commands with the -f and -d options to the enable builtin command
o using the enable builtin command to enable disabled shell builtins
o specifying the -p option to the command builtin command
o turning off restricted mode with set +r or set +o restricted.
These restrictions are enforced after any startup files are read.
When a command that is found to be a shell script is executed, rbash turns off any restrictions in the shell spawned to execute the script.
SEE ALSO
bash(1)
GNU Bash-4.0 2004 Apr 20 RBASH(1)