Thanks, that was simple and effective.
Here is another problem that has been bugging me, have a look at this too if u can. . Thank you. ---------- Post updated at 06:44 PM ---------- Previous update was at 06:34 PM ----------
Take this code as example i have been trying to find out why my code was not working and this was happening, CODE:
OUTPUT
pop
the
one
This output comes up correctly when i just type these commands.
But, when i write the whole code in a file and save it as mycode and then run it as ./mycode it says: ./mycode: line 2: set: -A: invalid option set: usage: set [--abefhkmnptuvxBCHP] [-o option] [arg ...]
Why is this so? can u explain?
Last edited by SasankaBITS; 07-21-2009 at 10:27 AM..
Reason: code tags, PLEASE!
Hello,
i have a file "Movie.ini" looking e.g. like follows
* MOVIE A
bla bla
MOVIE B
blubb blubb
MOVIE C
I'd like to read the file "Movie.ini" with cat and grep and check whether it includes the string MOVIE only with a '*' at the beginnig.
By doing
"cat Movie.ini| grep MOVIE... (14 Replies)
Hi,
I have an array like below...
Table="table1"
Table="table2"
Table="table3"
Table="table4"
.....
Table="tablen"
I want to retireve the values from the array and need to pass this to a db2 command to create a view like below.
the number of values in the array will vary
... (1 Reply)
Hi,
I am trying to read a set of numbers that are in scientific notation into a file so I can do some math on them, but when I display the array contents the numbers aren't the same as the numbers in the file.
Could someone explain why? Thanks.
int main()
{
double fArray;
... (3 Replies)
I wrote a simply perl that searched a file for a particualr value and if it found it, rite it and the next three lines to a file. Now I have been asked to check those next three lines for a different value and only write those lines if it finds the second value.
I was thinking the best way to... (1 Reply)
I need some help with this code below, i doesnt know why it will run twice with my function, but my function only got if else, any other way that can read line and put into array?
while read line; do
read -A array <<<$line
n=${#array}
for ((i=1;i<$n;i++)); do
print... (1 Reply)
I have some version problem to use this code in my server
while read line; do
read -A array <<<$line <---------- the server dont read <<<
n=${#array}
for ((i=1;i<$n;i++)); do
print "${array}"
done
func=${array}
data1=${array}
data2=${array}
... (1 Reply)
Hi,
I am not so familiar with bash scripting and would appreciate your help here.
I have a text file 'input.txt' like this:
2 3 4
5 6 7
8 9 10
I want to store each column in an array like this
a ={2 5 8}, b={3 6 9}, c={4 7 10}
so that i can access any element, e.g b=6 for the later use. (1 Reply)
Hi,
I need to read a file into array and print them in a loop:-
1st file :-cat a.txt
RC1
RC2
RC3
RC4
My Program:-
#!/bin/ksh
index=0
while
do
read cnt<a.txt
print "cnt value is ${cnt}
index=`expr $index + 1`
done
Code tags for code, please. (5 Replies)
Hi I have a file with contents as below :
server | ABC Issue : File System Missing XYZ Issue : Wrong Syntax PQR Issue : Old File to be removed
Now I am looking for an o/p similar to
server <tab> ABC Issue : File System Missing
<tab> XYZ Issue : Wrong Syntax
<tab>... (4 Replies)
Hi All,
need help with reading the array and sum of the array elements.
given an array of integers of size N . You need to print the sum of the elements in the array, keeping in mind that some of those integers may be quite large.
Input Format
The first line of the input consists of an... (1 Reply)
Discussion started by: nishantrefound
1 Replies
LEARN ABOUT LINUX
wordexp
WORDEXP(3) Linux Programmer's Manual WORDEXP(3)NAME
wordexp, wordfree - perform word expansion like a posix-shell
SYNOPSIS
#include <wordexp.h>
int wordexp(const char *s, wordexp_t *p, int flags);
void wordfree(wordexp_t *p);
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
wordexp(), wordfree(): _XOPEN_SOURCE
DESCRIPTION
The function wordexp() performs a shell-like expansion of the string s and returns the result in the structure pointed to by p. The data
type wordexp_t is a structure that at least has the fields we_wordc, we_wordv, and we_offs. The field we_wordc is a size_t that gives the
number of words in the expansion of s. The field we_wordv is a char ** that points to the array of words found. The field we_offs of type
size_t is sometimes (depending on flags, see below) used to indicate the number of initial elements in the we_wordv array that should be
filled with NULLs.
The function wordfree() frees the allocated memory again. More precisely, it does not free its argument, but it frees the array we_wordv
and the strings that points to.
The string argument
Since the expansion is the same as the expansion by the shell (see sh(1)) of the parameters to a command, the string s must not contain
characters that would be illegal in shell command parameters. In particular, there must not be any unescaped newline or |, &, ;, <, >, (,
), {, } characters outside a command substitution or parameter substitution context.
If the argument s contains a word that starts with an unquoted comment character #, then it is unspecified whether that word and all fol-
lowing words are ignored, or the # is treated as a non-comment character.
The expansion
The expansion done consists of the following stages: tilde expansion (replacing ~user by user's home directory), variable substitution
(replacing $FOO by the value of the environment variable FOO), command substitution (replacing $(command) or `command` by the output of
command), arithmetic expansion, field splitting, wildcard expansion, quote removal.
The result of expansion of special parameters ($@, $*, $#, $?, $-, $$, $!, $0) is unspecified.
Field splitting is done using the environment variable $IFS. If it is not set, the field separators are space, tab and newline.
The output array
The array we_wordv contains the words found, followed by a NULL.
The flags argument
The flag argument is a bitwise inclusive OR of the following values:
WRDE_APPEND
Append the words found to the array resulting from a previous call.
WRDE_DOOFFS
Insert we_offs initial NULLs in the array we_wordv. (These are not counted in the returned we_wordc.)
WRDE_NOCMD
Don't do command substitution.
WRDE_REUSE
The argument p resulted from a previous call to wordexp(), and wordfree() was not called. Reuse the allocated storage.
WRDE_SHOWERR
Normally during command substitution stderr is redirected to /dev/null. This flag specifies that stderr is not to be redirected.
WRDE_UNDEF
Consider it an error if an undefined shell variable is expanded.
RETURN VALUE
In case of success 0 is returned. In case of error one of the following five values is returned.
WRDE_BADCHAR
Illegal occurrence of newline or one of |, &, ;, <, >, (, ), {, }.
WRDE_BADVAL
An undefined shell variable was referenced, and the WRDE_UNDEF flag told us to consider this an error.
WRDE_CMDSUB
Command substitution occurred, and the WRDE_NOCMD flag told us to consider this an error.
WRDE_NOSPACE
Out of memory.
WRDE_SYNTAX
Shell syntax error, such as unbalanced parentheses or unmatched quotes.
VERSIONS
wordexp() and wordfree() are provided in glibc since version 2.1.
CONFORMING TO
POSIX.1-2001.
EXAMPLE
The output of the following example program is approximately that of "ls [a-c]*.c".
#include <stdio.h>
#include <stdlib.h>
#include <wordexp.h>
int
main(int argc, char **argv)
{
wordexp_t p;
char **w;
int i;
wordexp("[a-c]*.c", &p, 0);
w = p.we_wordv;
for (i = 0; i < p.we_wordc; i++)
printf("%s
", w[i]);
wordfree(&p);
exit(EXIT_SUCCESS);
}
SEE ALSO fnmatch(3), glob(3)COLOPHON
This page is part of release 3.27 of the Linux man-pages project. A description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/man-pages/.
2008-07-14 WORDEXP(3)