02-21-2018
Quote:
Originally Posted by
RudiC
e.g. a line in an input file?
I don't think it is "a line", but several lines; at least it follows from his comment. So in any case, he must have some program which extracts a set of lines from the input file and writes these to stdout. Hence, if we catch this with
var1=$(this_program)
we already have in var1 a string containing the newlines and are settled. Since we don't know more how he gets his lines for var1, we can not be more concrete, but I think we can safely assume that any extraction of lines from a file must be done with
some program.
Then he has another variable (var2) which, from his comment, is a literal string containing newlines.
Finally, he wants to create a third variable which catenates the previous two. While this now is not related to the newline problem anymore, the code he shows for catenation was incorrect, so I fixed that too.
This User Gave Thanks to rovf For This Post:
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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)