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Full Discussion: Matching string from input to string of file
Top Forums Shell Programming and Scripting Matching string from input to string of file Post 302563257 by ygemici on Monday 10th of October 2011 02:40:03 PM
Old 10-10-2011
Quote:
Originally Posted by a_smith
contents of file:
1
scott
mexico
2
john
new delhi

im trying to match numbers of above file with input using 'read'
Code:
#!/bin/bash
#file_no=`paste -s -d  "||||\n" a.txt | cut -c 1`
#it will return collection number from file

# maybe you can use like this instead of above cmd
# file_no=`paste -s -d  "||\n" a.txt|cut -d'|' -f1`

## but you must use grep for this achieve to me
file_nos=$(grep '^[0-9]*$' a.txt)
## at the now file_nos = "1 2"
## you can use echo now!!
## echo $file_nos is like seem -> 1 2 (with D_FS)
## echo with double quotes for literal values between quotes so we save our newlines
## echo "$file_nos" is like -> 1\n2

echo "enter number"
read "curr_no"
## for exa you entered multiple nrs --> 1 2
## best method is grep for compare any values
## but we must use split to lines for best comparing..
## so our elements are "1 2"
## if compare its for multiple elements with grep
## then we change spaces to newline for grep search
## we can use tr command
## we try to tr command for clearly line comparing
## and you can use $(commands) exprs instead of (``) backticks
new_curr_no=$(echo "$curr_no"|tr ' ' '\n')

## so above command is equal almost! with below cmds
# new_curr_no=`echo "$curr_no"|tr ' ' '\n'`
## and new_curr_no="1\n2"
## new_curr=
#1
#2

# at the now we can assign an array for complete best comparing
new_curr_no_arr=($new_curr_no)
# new_curr_no_arr[0]=1
# new_curr_no_arr[1]=2

# use for loop \for one-to-one the elements of comparison
for nr in ${new_curr_no_arr[@]}
do

## we can use grep with -w for 'word regexp'
if [[ $(echo $nr|grep -w "$file_nos") ]]

## if the grep cmd return to shell with success status so it is 0
## if the grep exit status is 0 then grep is success so means there is in..
then
## then write your message
echo "$nr number already present"

else
## if not
echo "$nr number is NOT present!!"
## the end of fi
fi
## the end of for
done

regards
ygemici
 

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LEARN ABOUT OPENSOLARIS

wscol

wstring(3C)						   Standard C Library Functions 					       wstring(3C)

NAME

       wstring, wscasecmp, wsncasecmp, wsdup, wscol - Process Code string operations

SYNOPSIS

       #include <widec.h>

       int wscasecmp(const wchar_t *s1, const wchar_t *s2);

       int wsncasecmp(const wchar_t *s1, const wchar_t *s2, int n);

       wchar_t *wsdup(const wchar_t *s);

       int wscol(const wchar_t *s);

DESCRIPTION

       These  functions operate on Process Code strings terminated by wchar_t null characters.	During appending or copying, these routines do not
       check for an overflow condition of the receiving string. In the following, s, s1, and s2 point to Process  Code	strings  terminated  by  a
       wchar_t null.

   wscasecmp(), wsncasecmp()
       The  wscasecmp()  function  compares its arguments, ignoring case, and returns an integer greater than, equal to, or less than 0, depending
       upon whether s1 is lexicographically greater than, equal to, or less than s2. It makes the same comparison but compares at most	n  Process
       Code characters. The four Extended Unix Code (EUC) codesets are ordered from lowest to highest as 0, 2, 3, 1 when characters from different
       codesets are compared.

   wsdup()
       The wsdup() function returns a pointer to a new Process Code string, which is a duplicate of the string pointed to by s. The space for  the
       new string is obtained using malloc(3C). If the new string cannot be created, a null pointer is returned.

   wscol()
       The wscol() function returns the screen display width (in columns) of the Process Code string s.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------------------------------------+
       |ATTRIBUTE TYPE		      ATTRIBUTE VALUE		   |
       |MT-Level		      MT-Safe			   |
       +-----------------------------------------------------------+

SEE ALSO

       malloc(3C), string(3C), wcstring(3C), attributes(5)

SunOS 5.11							    29 Dec 1996 						       wstring(3C)
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