03-16-2011
so if i set an element of a file_pointer array to 0, and then i compare NULL to that value 0, will it crash or just result to false, cause i set the file pointer array and pid array to 0, after closing its respective file pointer. this is like removing the struct from the chain of structs, but using an array method.
also
for the popen_new function
the instruction given was ls; ls
Last edited by omega666; 03-17-2011 at 05:15 PM..
10 More Discussions You Might Find Interesting
1. Programming
Hi
The following is my program to test popen()
routine. The purpose is to print some contents
of the corrent directory.
But in fact, the output is only one character
'a', which I believe is the first char of the file
"a.out".
So, can anybody tell me what is wrong about
this program?... (2 Replies)
Discussion started by: dell9
2 Replies
2. Programming
hai friends
I have written a tcp chat server in c.. I have designed a cgi program in c to control it... When i try to start the server from the cgi program, it is not starting. Why is that ? I have even tried giving the root ownership for all the programs.. Still its not.
I have used the... (1 Reply)
Discussion started by: collins
1 Replies
3. Programming
Hi there,
I'm facing a problem running the tar command with the popen function.
FILE* fp = popen("tar czf - textfile","r")
// output
this program should give the output to the stdout. I don't know if it is possible and which function like fprint() etc. should I use.
I suppose that I... (4 Replies)
Discussion started by: stef83
4 Replies
4. Programming
hi,
how to work with a background process without a controlling terminal to make use of popen or system call ?
when ever i use popen or system function call in foreground process, there is no problem with respect to that .. but when the same program is run as a background process without a... (7 Replies)
Discussion started by: matrixmadhan
7 Replies
5. Shell Programming and Scripting
Hello I'm writing a web server in python(obelisk-http.sourceforge.net)
and I'm having a greeat problem with POST method it like that
When someone make a POST request to the server it must open the executable(perl/python/.exe/elf) and send to the STANDART in (stdin) the request and get the... (2 Replies)
Discussion started by: sendai
2 Replies
6. Programming
Hi!
I'm trying to write a c program. The child process must transmit to the parent a file name and the parent must count the lines from the file and return te result to the child. Here is what i've done. It doesn't stop running, I guess. I'm sorry if it's an ugly code, i'm new at this stuff,... (2 Replies)
Discussion started by: alina89
2 Replies
7. UNIX for Advanced & Expert Users
Hi
I am trying to use popen function with wrtie option to give inputs to ftp command.
#include "stdio.h"
int main(int argv ,char *argc)
{
int size=0;
char *buf;
FILE *fp;
fp = popen("ftp","w");
while(getline(&buf,&size,stdin) != -1)
write(fp,buf);... (0 Replies)
Discussion started by: kumaran_5555
0 Replies
8. Programming
hi,
i am trying to use popen to run a grep process and check if the pattern exists in the file that i am searching in. i am getting segmentation fault when i try to execute the following code
char *cd;
char flag;
char hdr_flpsp;
char hdr_flpsp2;
FILE *fp;
printf ("program starts");... (1 Reply)
Discussion started by: sais
1 Replies
9. Programming
in man system it talks about SIGCHLD will be blocked, and SIGINT and SIGQUIT will be ignored.
Does this signal stuff also happen in popen command?
(even though man popen says nothing about signals)
also if I am not using wait(&status) and I am using waitpid(pid, NULL, 0)
how would... (1 Reply)
Discussion started by: omega666
1 Replies
10. Programming
Hello all,
I am reading a huge zip file in POPEN process and then writting that to a normal file which of 2GB. Now the process is failing when I looked for the cause someother process comming in after I read my file and it is deleting the zip. But in theory the popen command should read the... (5 Replies)
Discussion started by: arunkumar_mca
5 Replies
LEARN ABOUT PHP
array_unique
ARRAY_UNIQUE(3) 1 ARRAY_UNIQUE(3)
array_unique - Removes duplicate values from an array
SYNOPSIS
array array_unique (array $array, [int $sort_flags = SORT_STRING])
DESCRIPTION
Takes an input $array and returns a new array without duplicate values.
Note that keys are preserved. array_unique(3) sorts the values treated as string at first, then will keep the first key encountered for
every value, and ignore all following keys. It does not mean that the key of the first related value from the unsorted $array will be kept.
Note
Two elements are considered equal if and only if (string) $elem1 === (string) $elem2 i.e. when the string representation is the
same, the first element will be used.
PARAMETERS
o $array
- The input array.
o $sort_flags
- The optional second parameter $sort_flags may be used to modify the sorting behavior using these values: Sorting type flags:
o SORT_REGULAR - compare items normally (don't change types)
o SORT_NUMERIC - compare items numerically
o SORT_STRING - compare items as strings
o SORT_LOCALE_STRING - compare items as strings, based on the current locale.
RETURN VALUES
Returns the filtered array.
CHANGELOG
+--------+---------------------------------------------------+
|Version | |
| | |
| | Description |
| | |
+--------+---------------------------------------------------+
|5.2.10 | |
| | |
| | Changed the default value of $sort_flags back to |
| | SORT_STRING. |
| | |
| 5.2.9 | |
| | |
| | Added the optional $sort_flags defaulting to |
| | SORT_REGULAR. Prior to 5.2.9, this function used |
| | to sort the array with SORT_STRING internally. |
| | |
+--------+---------------------------------------------------+
EXAMPLES
Example #1
array_unique(3) example
<?php
$input = array("a" => "green", "red", "b" => "green", "blue", "red");
$result = array_unique($input);
print_r($result);
?>
The above example will output:
Array
(
[a] => green
[0] => red
[1] => blue
)
Example #2
array_unique(3) and types
<?php
$input = array(4, "4", "3", 4, 3, "3");
$result = array_unique($input);
var_dump($result);
?>
The above example will output:
array(2) {
[0] => int(4)
[2] => string(1) "3"
}
SEE ALSO
array_count_values(3).
NOTES
Note
Note that array_unique(3) is not intended to work on multi dimensional arrays.
PHP Documentation Group ARRAY_UNIQUE(3)