How to Force command substitution evaluation in bash?
OK, I'm striving to abide by all the rules this time.
Here is a fragment of my windows10/cygwin64/bash script:
"BackupRecords --log" is a program I wrote to return a unique log file name using the current time.
The problem is that I get two different log files. How can I force the evaluation of BUGLOG sooner?
Is it possible with a bash variable to perform multiple substitution strings to one variable?
I have this variable:
echo $clock
TIMEZONE="US/Central"
What I would like to do with bash only it pull out just the "US" part of the variable.. which could be any number of countries.
this is... (6 Replies)
Hi,
I'm using an array that contains compiler FLAGS
that need to be executed either before ./configure
or after the main 'make' command.
example of array containing compiler flags.
-------------------------------------------------
FLAGS="CFLAGS=\"-arch x86_64 -g -Os -pipe... (7 Replies)
Hello!
I'm writing a shell script using #!/bin/bash instead of #!/bin/sh because of the substitution: ${!variable}, which won't work with sh. My main problem is the following (just a summarized example, the script is much more complex):
# sourced from a configuration file, we have a lot of... (6 Replies)
Hi all!
I'm writting one script to copy a file in various folders, but there are 2 things to validate. First that the folder where i'll be cpying exists, and second that i have permissions to copy the file in it.
so far i have found the way to validate the folder exists, but when trying to... (6 Replies)
I have one script calling another with a set of strings that includes white space. Script A calls Script B with these input strings: one two "th ree"
Script B pulls apart the arguments correctly:
arg0 = one, arg1 = two, arg2 = "th ree"
if I call it from within Script A like so:... (10 Replies)
I'm building a script that may received start and end date as parameters. I whant to make it as flexible as possible so I'm accepting epoch and date in a way that "date --date=" command may accept. In order to know if parameter provided is an epoc or a "date --date=" string I evaluate if the value... (2 Replies)
OK, I'm striving to abide by all the rules this time.
Here is a fragment of my windows10/cygwin64/bash script:
export BUPLOG=$(BackupRecords --log "$src")
robocopy $(BackupRecords -mrbd "$src" --path "$src") $(BackupRecords --appSwitches "$src") "$src" "$dst" $(BackupRecords --fileSwitches... (0 Replies)
Could somebody please explain to me why and how the highlighted line(s) (?) of code puts the "test" evaluation into "result" and then to $enable_static ? Or does not ?
I did comment out the original code and changed it to what I feel is less cryptic , but the "result" is still wrong =... (3 Replies)
Discussion started by: anne
3 Replies
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rbash
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 filename 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)