I have a file "fwcsales_filenames.txt" which has a list of file names that are supposed to be copied to another directory. In addition to that, I am trying to extract the date part and write to the log.
I am getting the regular expression error when trying to strip the date part using the "ll"... (1 Reply)
I'm a beginner so I might make beginner mistakes.
I want to count the "#define" directives in every .C file
I get the following errors:
./lab1.sh: line 5: ndef: command not found
./lab1.sh: line 6:
#!/bin/sh
for x in *.
do
ndef = 'grep -c \#define $x'
if ; then
... (2 Replies)
HI again, still working on the assignment, which is really hard given we just started unix 4 weeks ago. This script should change the permission for the user depending if its x, w or r, to the opposite. When i try to run it, I am getting expression error. Can you spot where the problem is? I really... (3 Replies)
#! /bin/csh
set umr=UMR
foreach i ( `ls`)
set file_nm=$i
set bh_nm=`echo $file_nm | cut -d"_" -f2`
if($bh_nm !=$umr) then
{
set bh_ext=`echo $file_nm | cut -d"_" -f4`
set bh_num_nm="$bh_nm $bh_ext a .txt"
mv $file_nm $bh_num_nm
}
... (1 Reply)
I'm pretty new to shell scripting, but I am catching on quick. I did see one of the stickied threads about the csh, and I think this is relevant, but I don't understand enough to make a decision based on it. So as you'll see below, I use the |csh pipe, and if that is not correct, I'm certainly... (2 Replies)
HI ,
I have a variable "TYPE" which may contain different values.
and another variable $TYPE"_SOURCE"
I am using ${$TYPE"_SOURCE"} to get the value TYPE_SOURCE for eg.
TYPE=ABC
ABC_SOURCE=/abc/xyz
On using above command I am getting error : BAD SUBSTITUTION
eval is not installed... (2 Replies)
Hello All,
I'm trying to extract the lines between two consecutive elements of an array from a file.
My array looks like:
problem_arr=(PRS111 PRS213 PRS234)
j=0
while } ]
do
k=`expr $j + 1`
sed -n "/${problem_arr}/,/${problem_arr}/p" problemid.txt
---some operation goes... (11 Replies)
#!/bin/bash
a1="04:29:39 - System health check failed"
i=$1
echo "a $((a$i))"
The script above gives the following error
$113> sh tryt.sh 1
tryt.sh: line 6: 04:29:39 - System health check failed: syntax error in expression (error token is ":29:39 - System health check failed")
It... (1 Reply)
Discussion started by: ashima jain
1 Replies
LEARN ABOUT V7
expr
EXPR(1) General Commands Manual EXPR(1)NAME
expr - evaluate arguments as an expression
SYNOPSIS
expr arg ...
DESCRIPTION
The arguments are taken as an expression. After evaluation, the result is written on the standard output. Each token of the expression is
a separate argument.
The operators and keywords are listed below. The list is in order of increasing precedence, with equal precedence operators grouped.
expr | expr
yields the first expr if it is neither null nor `0', otherwise yields the second expr.
expr & expr
yields the first expr if neither expr is null or `0', otherwise yields `0'.
expr relop expr
where relop is one of < <= = != >= >, yields `1' if the indicated comparison is true, `0' if false. The comparison is numeric if
both expr are integers, otherwise lexicographic.
expr + expr
expr - expr
addition or subtraction of the arguments.
expr * expr
expr / expr
expr % expr
multiplication, division, or remainder of the arguments.
expr : expr
The matching operator compares the string first argument with the regular expression second argument; regular expression syntax is
the same as that of ed(1). The (...) pattern symbols can be used to select a portion of the first argument. Otherwise, the
matching operator yields the number of characters matched (`0' on failure).
( expr )
parentheses for grouping.
Examples:
To add 1 to the Shell variable a:
a=`expr $a + 1`
To find the filename part (least significant part) of the pathname stored in variable a, which may or may not contain `/':
expr $a : '.*/(.*)' '|' $a
Note the quoted Shell metacharacters.
SEE ALSO ed(1), sh(1), test(1)DIAGNOSTICS
Expr returns the following exit codes:
0 if the expression is neither null nor `0',
1 if the expression is null or `0',
2 for invalid expressions.
EXPR(1)