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POST UPDATE: Thanks for the heads up on the strlen vs sizeof. It also needs to add 1 to include the string terminator. here is the final version:
char *STRINGtoLOWERCASE(const char *IN) // converts...

N00B here. This function would be easier using a char pointer along with free. But I wish to learn how to use char static pointers (they do not require free, right ?).

How do I erase the content...

When fread is used twice, the second time it seems to overwrite the first time's output. Is there any way to clear fread's internal buffer after each use ?

char *FILEREAD(const char *FILENAME)
{...

Can anybody tell me why any literal constant real numbers are double by default in C ? Why is the default not float ?

sscanf does not stop at the first "&". How can I extract "doe" ?
char A[50] = "name=john&last=doe&job=vacant&";

char B[10] = "last";

char C[10] = "";

char *POINTER = strstr(A, B);
...

I need to match a float inside a very long string (about 5000 chars) with sscanf. (I trimmed the string in this example.) I can't seem to match all the chars that come before and after the float.
...

gethostbyaddr() is deprecated in favor of getnameinfo().

-Wunreachable-code is broken and has been removed in gcc 4.5.

Bug report:
Bug 42406 - gcc issues warning with tolower function with optimization flag...

I finally got it working:

char *IPtoHOST(const char *IP) // returns host name from IP address. If failure, returns IP address.
{
static char BUFFER[65] = "";

struct sockaddr_in SIN; //...

gcc complains about these errors but I do not understand how to solve them. In other sites I see sin_addr and sin_port not inside a structure. Passing an int to argument 1 of getnameinfo does not...

I'm trying to write a function to get the host name of any given IP address.

I'm trying to follow this manual but I'm stuck. I'm using gcc and Linux. Any ideas?

getnameinfo()...

Tried, but still the same warning.

I tried with gcc-4.4 (Debian 4.4.2-3) 4.4.2 and get the same error but this time repeated:



---------- Post updated at 02:05 PM ---------- Previous update...

gcc (Debian 4.3.4-6) 4.3.4

I get this gcc warning, but the function works correctly. Any ideas?



#include <stdio.h>
#include <string.h>
#include <ctype.h>

int main(void)
{
char A[50] = "";
strcat(A,...

I get the following gcc warning. I do not see a double being declared anywhere... how can I fix this?

(This code is just an example, I realize that the first if bracket will never be executed.)
...

I tried deleting the RANDOM function and placing its contents inside main, then use a variable to feed the random number to the other functions. This works yet it defeats the whole purpose of using a...

gcc error:
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <string.h>
#include <time.h>

int RANDOM(void)
{
int RANDOMNUMBER = 0;

...

I've been fiddling with this for hours. I've tried to save the random number in a variable outside a function but gcc keeps saying something like that the random number is not constant. Somehow I...

I need to generate and reuse a 5 digit random number every time my program is executed. But the following generates random numbers every time the function is called.
#include <stdio.h>
#include...

I cannot get this shell script to work. The path to sendmail is correct...

#!/bin/bash

echo -e "Subject: email subject\n\nemailbody" | /usr/sbin/sendmail -F fromemail@somedomain.com -t...

Thank you Mr. Pitt. I wondered why they were escaped! :b:

I am using GNU sed but this does not output "what". Why?

HEY=$(echo "hey 70.70.70.70:21 what: " | sed -nr 's/.*(70.70.70.70\|71.71.71.71):(21\|22\|115\|443\|989\|990) (.*):.*/\3/p')
echo $HEY

1.
I need to send emails using a shell script on linux. I want to use the most widespread method (the preferred method). Is one considered deprecated in favor of the other? Which, mail or sendmail ?...

Yes, shopt was missing. :b:

I tried this code but is not functional (at least in bash). FILTERED still outputs the string unchanged. The second code posted does work though.


FILTERED=${STRING//@( word1| word2)/}