bash: command substitution: line 1: unexpected EOF while looking for matching `"'
bash: command substitution: line 2: syntax error: unexpected end of file
How do I eval a string like "awk 'BEGIN{ FS="\""}/string/ {print $0}' filename" and attach the result to a variable??
The backslash of this string creates a problem when i try
Hi,
I have a script which looks through an input file and takes data from the file to use within the script.
Everything works fine until the script reads the item \windows\directory\structure\ from the input file into a variable.
As unix sees the backslash as an escape character, the... (5 Replies)
Hi
I need the "\\hello" (without double quotes) to be written to a file.
echo "\\\\hello" >file is working under bash shell but not working under ksh shell (gives only one / in the output)
Please advise.
TIA
Prvn (4 Replies)
I have a line that contains backslashes in which I want sed to substitute text with variables.
The line;
\\s008\2033330user$
I want to change this in \\s008.ourschool.com\2033330user$
I now use this script:
USER=2033330user
sed 's/\\'"$USER"'/.ourschool.com\\'"$USER/"
This doesn't... (3 Replies)
Bit of a weird one i suppose, i want to use an echo inside an echo... For example...
i have a script that i want to use to take users input and create another script. Inside this script it creates it also needs to use echos...
echo "echo "hello"" >$file
echo "echo "goodbye"" >$file
... (3 Replies)
Hi I am getting absurd behavior of escape character in echos as followed:oinlcso003{arsadm} #: echo "\as shdd"
\as shdd
oinlcso003{arsadm} #: echo "Well, isn't that \"special\"?"
Well, isn't that "special"?
oinlcso003{arsadm} #: echo "Well, isn't that \special\?"
Well, isn't that \special\?... (3 Replies)
Hi there,
I found something very weird!
Should I report that as a bug or is it me misusing the command?
I've got a file with a backslash in its name.
I know it's a horrible policy but it's not me.
The file came from a mac computer because this is a backup server.
Anyway, when using... (8 Replies)
Hello All,
In a Bash Script I'm writing I have a section where I loop through a text file that was
outputted by another script. In the text file some of the strings in there are enclosed with
the BOLD "character sequences" (i.e. "\033But it's weird, because if I run this command:
echo -E... (12 Replies)
Let's say I have a text file called process.out that contains:
cn=long\, ann,cn=users
cn=doe\, john,cn=users
I need to have the following appended in the beginning
ldapdelete -h $OIDHOST
So the final output looks like:
ldapdelete -h $OIDHOST "cn=long\, ann,cn=users"
ldapdelete -h... (4 Replies)
Hi,
How do I input \ when I do a vi of my file ? I try to input the \ but it came out as @.
Appreciate any help. (4 Replies)
Discussion started by: snowfrost88
4 Replies
LEARN ABOUT DEBIAN
subst
subst(3tcl) Tcl Built-In Commands subst(3tcl)__________________________________________________________________________________________________________________________________________________NAME
subst - Perform backslash, command, and variable substitutions
SYNOPSIS
subst ?-nobackslashes? ?-nocommands? ?-novariables? string
_________________________________________________________________DESCRIPTION
This command performs variable substitutions, command substitutions, and backslash substitutions on its string argument and returns the
fully-substituted result. The substitutions are performed in exactly the same way as for Tcl commands. As a result, the string argument
is actually substituted twice, once by the Tcl parser in the usual fashion for Tcl commands, and again by the subst command.
If any of the -nobackslashes, -nocommands, or -novariables are specified, then the corresponding substitutions are not performed. For
example, if -nocommands is specified, command substitution is not performed: open and close brackets are treated as ordinary characters
with no special interpretation.
Note that the substitution of one kind can include substitution of other kinds. For example, even when the -novariables option is speci-
fied, command substitution is performed without restriction. This means that any variable substitution necessary to complete the command
substitution will still take place. Likewise, any command substitution necessary to complete a variable substitution will take place, even
when -nocommands is specified. See the EXAMPLES below.
If an error occurs during substitution, then subst will return that error. If a break exception occurs during command or variable substi-
tution, the result of the whole substitution will be the string (as substituted) up to the start of the substitution that raised the excep-
tion. If a continue exception occurs during the evaluation of a command or variable substitution, an empty string will be substituted for
that entire command or variable substitution (as long as it is well-formed Tcl.) If a return exception occurs, or any other return code is
returned during command or variable substitution, then the returned value is substituted for that substitution. See the EXAMPLES below.
In this way, all exceptional return codes are "caught" by subst. The subst command itself will either return an error, or will complete
successfully.
EXAMPLES
When it performs its substitutions, subst does not give any special treatment to double quotes or curly braces (except within command sub-
stitutions) so the script
set a 44
subst {xyz {$a}}
returns "xyz {44}", not "xyz {$a}" and the script
set a "p} q {r"
subst {xyz {$a}}
returns "xyz {p} q {r}", not "xyz {p} q {r}".
When command substitution is performed, it includes any variable substitution necessary to evaluate the script.
set a 44
subst -novariables {$a [format $a]}
returns "$a 44", not "$a $a". Similarly, when variable substitution is performed, it includes any command substitution necessary to
retrieve the value of the variable.
proc b {} {return c}
array set a {c c [b] tricky}
subst -nocommands {[b] $a([b])}
returns "[b] c", not "[b] tricky".
The continue and break exceptions allow command substitutions to prevent substitution of the rest of the command substitution and the rest
of string respectively, giving script authors more options when processing text using subst. For example, the script
subst {abc,[break],def}
returns "abc,", not "abc,,def" and the script
subst {abc,[continue;expr {1+2}],def}
returns "abc,,def", not "abc,3,def".
Other exceptional return codes substitute the returned value
subst {abc,[return foo;expr {1+2}],def}
returns "abc,foo,def", not "abc,3,def" and
subst {abc,[return -code 10 foo;expr {1+2}],def}
also returns "abc,foo,def", not "abc,3,def".
SEE ALSO Tcl(3tcl), eval(3tcl), break(3tcl), continue(3tcl)KEYWORDS
backslash substitution, command substitution, variable substitution
Tcl 7.4 subst(3tcl)