Programming :: Pass Arguments To A Function Using A Loop

Mar 1, 2010

I need to pass a large number of arguments to a function which takes variable number of arguments, such as gtk_list_store_new. But it doesn't look nice if i write something like gtk_list_store_new(NUM,TYPE_A,TYPE_B,TYPE_C,...,TYPE_OMEGA); because of large number of arguments. And, it will be a trouble to change number of columns because of need to manually change arguments to large number of such functions. So, how can i pass all the arguments to a function using a loop? Something like

Code:
for(i=0;i<NUM;i++)
{
push_arg(args[i]);
}
call_function(func);
?

Of course, i could just use asm code for this, but is there a portable way of doing so?

P.S. i mean C language.

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General :: Pass All Arguments To A Function?

Jul 6, 2010

I've got a sticky little problem with a bash script. Please consider the following code:

Code:
#! /bin/bash
processArgs() {
echo "Count = $#"
while [[ $# -ne 0 ]]; do
echo $1
shift
done
}

processArgs $* If I call this script with Code: ./script first second third it'll print each of the argument on a new line - exactly what I would expect. However if I call it with

Code: ./script "Single Argument" "Second-Argument" it splits the first argument in two using the space as a delimitor. The problem appears to be the call to processArgs, where $* doesn't honour the quotes around the variables sent to the script.

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Jun 9, 2011

I am using getopts to take parse optional arguments but i also pass in mandatory arguments first

[code]
#!/bin/bash
print_usage()
{
perror "$@"
}
arg1="$1"
arg2="$2"
shift 2
[Code]....

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Mar 5, 2010

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Jan 14, 2011

I wrote a C++ program that uses two different parsers. The first parser is reading program arguments from command line:./mybin arg1 arg2 ...then during program execution there's an interactive prompt asking for more parameters:

...
>> (second bunch of arguments here)
...

I'd like to run my program inside a bash script, but I don't know how to give the second level arguments.

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Oct 9, 2010

I'm trying to compile the hidtouch driver, but hit a snag. The error I get is

[code]....

Context: this is the driver for the touchscreen attached to an LTSP client. The server uses the AMD64 arch, the client uses the 1386 arch, both Debian. The client does start, but lacking a pointer device the pointer is useless. The build takes place on the server, in the i386 chroot of the LTSP setup. Basically, I'm stuck now...

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Programming :: Function Pointers With Variable Arguments

Jul 14, 2011

I need to call functions that match an input string (if input str = "func1", call func1), so I have this:

Code:
#include <stdio.h>
#include <string.h>
void function_a(void) { printf("Function A
"); }

[Code].....

In the above example, the functions take no input arguments. Can they take a different number of arguments, for example, function_a(int), function_c(int, int), function_e(int, char, int)? How can I do that?

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Jan 27, 2011

I have the following char* array

Code:
char* chrarray[] = {"Hello","LinuxQuestions"};
and I need to pass it into a function, how should I define my function in the header file?

[code]....

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Sep 4, 2010

I have to compute prime numbers with threads in C. So I choose the algorithm "Sieve of Eratosthenes" and I tried to create 2 threads, but I don't know how to optimize my computing function with threads I beg for help. This is my function:

[Code]...

but it seems like the both of the threads are calculating the same function twice? Is it possible to be optimized or not?

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Software :: Pass Arguments In Scripts?

Dec 13, 2010

I am calling script 2 from script 1. Is it possible for me to pass the output from script 2 to script 1 as the value of a variable. for eg.. path=`/XXX/XXX/script2.sh`

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General :: Bash : Pass Command Line Arguments Containing Special Characters?

Jul 14, 2010

I've written myself a linux program "program" that does something with a regular expression. I want to call the program in the bash shell and pass that regular expression as a command line argument to the program(there are also other command line arguments). A typical regular expression looks like "[abc]_[x|y]".Unfortunately the characters [, ], and | are special characters in bash. Thus, calling "program [abc]_[x|y] anotheragument" doesn't work. Is there a way to pass the expression by using some sort of escape characters or quotation marks etc.?

(Calling program "[abc]_[x|y] anotheragument" isn't working either, because it interprets the two arguments as one.)

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General :: Bash: How To Pass Command Line Arguments Containing Special Characters

Jun 24, 2011

I've written myself a linux program "program" that does something with a regular expression. I want to call the program in the bash shell and pass that regular expression as a command line argument to the program (there are also other command line arguments). A typical regular expression looks like "[abc]_[x|y]". Unfortunately the characters [, ], and | are special characters in bash. Thus, calling "program [abc]_[x|y] anotheragument" doesn't work. Is there a way to pass the expression by using some sort of escape characters or quotation marks etc.? (Calling program "[abc]_[x|y] anotheragument" isn't working either, because it interprets the two arguments as one.)

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General :: Arch Usability - Pass Arguments From A Shell Script To A Program?

May 7, 2010

1. What file do i have to edit in order to include /usr/local/bin in the class path (ie. I put an executable in /usr/local/bin and when I try to execute it, it says the command cannot be found, etc.) EDIT: Solved, just didn't set PATH correctly. EDIT: New problem. When I try to execute a program in /usr/local/bin, it says "fopen: john.ini: File not found" Yet when i cd to /usr/local/bin, it doesn't say that. What would cause this?

2. Once I get my system setup the way i like it, how would i go about making it into a bootable CD/DVD?

3. How would I pass arguments from a shell script to a program?

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General :: For Loop - Make Use Of Arguments Passed To Scripts Ranging From 2nd To Last

Feb 20, 2011

I am writing a scripts which involves for loop. I want to make use of arguments passed to scripts ranging from 2nd to last. I tried to use below

Quote:
kint `whoami`/root
for i in $2..$*
do
ssh root@$i "cd /local/0/home;mkdir -p $1/test"
done

I am trying to run it as below

Quote:
./scriptname webtech myserver1 myserver2 myserver3

and it gives following error Quote: ssh: myserver1..myserver2: name or service not known I basically want to pass arguments from myserver1 to myserver3 to the script.

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Nov 16, 2010

I wanted to make an alias with arguments (like in cshell) which is in bash done by functions. The function must simply perform a command (nedit), append the arguments from the cli and make it run in the background (adding &).

So here is the function in a naive attempt:

Code:

when using the command

Code:

Code:

How can i use arguments and still start it in background? In cshell it was like:

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Feb 11, 2010

I am trying to write a script that will find any user on the server running more than one instance of the epiphany web browser process, then kill all their epiphany pids. (This is necessary sometimes to cure lockups, and repeat processes are the telltale sign in this case). I have tried implementing the until loop:

Code:
USER=`ps aux | grep epiphany | grep -v grep | sort | uniq -d -w 5 | awk '{print $1}'`
until [[ "$USER" == "" ]]
do
ps aux | grep epiphany | grep -v grep | grep $USER | awk '{print $2}' | sudo xargs kill
done

Unfortunately, the script only calculates the USER variable once at the beginning of the script. Fair enough, that's how it's written. My question is, how would I get the USER variable to update for each pass of the until loop so that it could cure multiple users of this ailment if necessary? That is, calculate $USER, kill their epiphany pids, repeat those two steps until the $USER variable comes up blank, then exit.

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Apr 26, 2011

The code:

Quote:

Problem: I need a method to maintain the $i variable. In fact, actually, this variable get lost when executed. I think that an escape can preserve this variable and permit its execution inside the function, but I've no idea about.

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Jul 28, 2010

What i want to do is create multiple informix sql statements & later run them via a bash script.

Here is what i have so far (this works) but is meant to be run from a cron job so it only does one day at a time:

echo "
update hst`date --date='yesterday' +%m%d%y`
set x = 'GARP'
where y in ('CRE', 'LAC', 'SRL', 'JAG', 'JNM', 'BIM')
and appl = '';

[Code].....

The problem here is it doesnt want to read the variable $x correctly so the statement fails.

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Nov 16, 2010

Code:
#include <iostream>
using namespace std;

[code]...

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May 18, 2010

I am doing some Linux kernel programming for my research project. I need to record the timestamp (by using cpuid and rdtsc) when an interrupt handler (top half) is first invoked. Due to the time critical nature of the problem itself, I have to do the timestamping inside the interrupt handler itself (the first operation when the handler is called). However, I understand that tasks that are not so time critical should be deferred to a tasklet function (bottom half) for processing because other interrupts are disabled in a (top-half) interrupt handler. I am currently out of idea on how I can pass the timestamp information that I have obtained in the interrupt handler to the corresponding tasklet function.

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Programming :: Threads Not Getting Arguments Properly

Mar 26, 2011

I wrote a C program using Pthreads to compute the product of 2 matrices. Each element in the product matrix is computed in a separate thread. Eg: Thread (i,j) computes the element C[i][j] of the matrix C, where C=A*B. A is m*n, B is n*p, C is m*p. m,n,p are given as command-line arguments. A and B are initialized to random values from 1 to 10, while all elements of C are initialized to -1.But some threads do not get their arguments (i,j) correctly. So some elements C[i][j] still remain as -1, even after the program is over. My OS is Ubuntu 10.10 (Maverick Meerkat) 32-bit.I ran the program on another computer and it worked correctly. Is it due to a problem in the Pthreads library in my OS? Please help me. I have attached the source code.

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Jan 6, 2010

How can I get the total arguments in perl.To be more specific if I try to execute the command

Code:
perl -w myperl.pl ash ok kumar

I should be able to get all the command line arguments.

I know that @ARGV will store only the arguments passed but not the entire arguments.

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May 24, 2010

I want to declare a function in a function, but had no success till now, see the error code below and visit the project at sourceforge

[Code]...

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Jun 20, 2010

I looked on the net for such function or example and didin't find anything, thus after having made one i guess it would be legitimate to drop it to see what others thinks of it.

#!/bin/bash
addelementtoarray()
{
local arrayname=$1

[code]....

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Dec 4, 2010

i want to pass variable in mysql qyery in c programming

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Mar 24, 2010

I have a script gdrGltoDataRefresh.sh .while try to run the script it's giving:

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Oct 11, 2010

i was wondering if someone could help me figure out a script for global variables i'm trying to set for a group of command line arguments:

basically i'm trying to set: if $# = 3 then i want to search for each all string $1 $2 $3

if $# = 4

then i want to search for each all string $1 $2 $3 $4

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Aug 17, 2010

I've been reading about getopt and getopts but it doesn't seem like it's possible to parse arguments like --foo or even -foo. I've started my own script trying to achieve this, but I'm still wondering if I'm losing performance and if there is a better way to do this task.

Also I'm using the [[ =~ ]] regex syntax which seems to be available only in newer bash versions, should it be a big issue? My bash version: GNU bash, version 4.1.7(2)-release (x86_64-unknown-linux-gnu)

[Code]...

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Jul 24, 2011

Whats wrong with this:

Code:
#include <stdio.h>
int main(int argc, char *argv[])
{
if(argv[4] == "-verbose")
{
printf("Verbose is on");

[Code]...

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Programming :: Parsing Command Line Arguments In PHP?

Feb 1, 2010

I want to know how to get eg. the contents of a form on a webpage which has been passed to a server side PHP script, inside for example an array which I can read. I've been reading a ebook on PHP which as far as I can see doesn't cover this inside it.

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