Of the 400 folks in ##C maybe 100 are real of that 100 maybe 1-3 are AWAKE at any any time

well, people here need to have their fun somehow

Meanwhile, I like to help folks that CARE to read and test, and visit folks I like.. Folks having issues with that can completely fuck-off.

adrahil, I dont use google, I much rather ask humans the questions

well, you should use google FIRST

Die.. Die young

PoppaVic, what your problem?

"What we are, unapologetically, is hostile to people who seem to be unwilling to think or to do their own homework before asking questions. People like that are time sinks . they take without giving back, and they waste time we could have spent on another question more interesting and another person more worthy of an answer. We call people like this .losers. (and for historical reasons we sometimes spell it .lusers.)."

in the computer world, asking first from humans, without trying to look up answers on your own, is a big no-no

from http://www.catb.org/~esr/faqs/smart-questions.html - "How to ask questions the smart way"

thanks, guys.. I would have been more hostile and more rude.

it's okay you can still be, you can add some oil on the fire, as one says hee

you ppl suck. just cuz I said i'm new to C programming you act all big and wise

just READ this document: http://www.catb.org/~esr/faqs/smart-questions.html

i'm reading im reading

well, I don't LIKE having to be the "heavy", but geezus-keerist.

that FAQ is so old and pompous

so?

define "pompous"?

why even send people to it?
"having or exhibiting self-importance"

PoppaVic and all the rest of the ppl acting like "pros" - THE FACT THAT YOU HAVE MORE KNOWLEAGE DOESNT MAKE YOU ANY BETTER. so start acting civil, like your silly topic says. god I hate IRC ego trippers...

yeah, well - we must be important, or they'd have solved it.. Or WANT human-feedback.. Note the precursor
yeah, well - we must be important, or they'd have solved it.. Or WANT human-feedback.. Note the precursor
it's either trivial or not.
and "not" means they tried to solve "trivial"

Please don't shout.
You need to link to the winsock library.

ok, installed mysql hosting and got the code to compile

stristr ? ew.

prec, thanks for the link. it would have been nice if someone would have just giving it to me when I asked the question. and if you dont like the way i'm searching for info, you really dont have to answer at all.

yes, bitbit it does.. Think it over, and stop acting like a rugrat watching anime, cartoons; collecting comics and playing stupid.

can you tell me why do you need to compile hosting it from source? is there something wrong with the .exe that comes in the zip

put-down-the-game-controller.. rtfm.. rtfb.... write the damned tests.

PoppaVic, wow. strong case, really. now that you gave me some many facts I can see you're right and i'm wrong -_-
rtfm? i asked for the fucking manual, you fucking idiot...

I already know you are wrong.. I don't even care if you learn it or why.

gtfm them

where is that damned mute button

MrG{DRGN}: /silence or /ignore

thanks

PoppaVic, so why dont you just shut up?

can you tell me why do you need to compile it from source? is there something wrong with the .exe that comes in the zip

i'm modifing it a bit

don't burn down all your bridges

I hardly consider that jerk a bridge...

I know, but it's a daily thing - like taking a leak, shiting or reading a book

Nevertheless, politeness is recommended.

I started with dev-c++ way back.. I could never get a completely working setup under windows.. there were always problmes with include/header files (probably a lack of understanding on my part also)

so you're saying http://www.opencfd.co.uk/openfoam/doc/userse5.html wont help me?
under windows...

Of the 400+ folks in ##C, maybe 100 are real; of that 100 maybe 1/3 are AWAKE at any any time - call it 33.. Of that 33, there are maybe 30 that learned with blood, sweat and tears.. Do you actually expect them to save some moron too lame to buy a few "clew"?

is that guy still talking about me? I need a translator, honest.

oh well

http://www.rohitab.com/discuss/index.php?showtopic=20122&pid=171011&mode=threaded&start=

Somewhere, somehow, you are expected to have a C compile (usually gcc), at least K&R as a book, and both access to google, manpages and TEST-time.
yeah - folks need a beating.. DAmned rugrats

what was the worst question of all? the one you'll always remember?

Geezus... the idea of my ol' man hearing I expected him to teach me... brrrrr
oh, hell - better to ask Baughn... I've seen sooooo many over the years that made me ask "umm, did you look for help? man? a BOOK?"

PoppaVic is only capable of speaking in generalities. :|

and those serve more often than not - I respect folks that focus the "contexts" ;-)
"what is main()?", "what is an 'int'" - lord, we'be seen it all

I fondly recall "Why can't the computer figure out the printf should be after the gets"

wow

oh, geezus

yeah

"you're smarter than the computer"

-_-

no.. THAT would be "casting"..

char *line; printf(line); line = gets(line); -- if I recall

the computer is just hw that runs and interprets
oh, geezus

wow
oh, he quit :P

still - it makes you want to cry or scream or fold the chair and BEAT someone

No, I took that reasonably well. What made me cry was when a lurker told him to run valgrind on it.

wtf choice did it have? No one here was about to write complete solutions for a lamer
uwtf choice did it have? No one here was about to write complete solutions for a lamer/u
buwtf choice did it have? No one here was about to write complete solutions for a lamer/u/b

Some days.. ;-)

you aren't that smart etc.

but I guess it was too indirect

some days I FEEL like the "evil-ogre-older-brother" and other days, well... Shit.. I wonder wtf planet/universe folks come from
perhaps... I find the limited AI of computers useful.. I find the wtf is an AI?? of newbies to be depressing
certainly neither I nor ##C has any mandate to save some clown from failing a test/course/class/job

damn, I was hoping you'd help me ;/

I already know Baughn and Zhivago and Xgc and twkm (and others) can become confused or rude when folks don't _communicate_.. I doubt any of them are willing to suffer complete fools.
And, How can anyone blame them?
yeah, right ;-)
hehe.. and I have no probs when 2-dozen folks - learning C with blood and sweat - leap on some clone ;-)
Sometimes "mob-rule" is fun. ;-)

good eating

I missed my cooking show... bastards
sure

good day

beyond taking off -fomit-fp and adding -ggdb and nostrip to CFLAGS, what else should be done for a debug build? hmm -O turned off. anything else

anyone here good with inline mips asm?

isn't there an #asm ?

yes

But they only do pure ASM =3

oh inline sry
wtf is =3 - a kiss-off?

depends whos in #asm

Debugging? No, -ggdb should be plenty. -fomit-frame-pointer won't actually degrade it as much as you think (for recent versions of gdb), but by all means turn it off. Oh, and avoid -s
Only thing I can think of is that it's helpful to have debugging libraries installed as well

ok thanks BrigadierFrog
isn't s for asm?
oh that's S sorry
yeah this is for when i want to switch compile options, thanks Baughn

Of course you should /always/ have warnings turned on

Bush is like the X86 - no one wants him but he's still president

In more ways than one. Without Microsoft and Commerical application backing X86 would not be as heavly used.

True.

good nigth

hey how do i detect what compiler my code's being compiled with? I want to do something like #if compiler == GCC and version = 4.2

__GNUC__ will probably beo of help... read the gcc cdocs....

hm
say, I have a problem
could someone help me understand why this code crashes:
http://rafb.net/p/QIr4RB53.html

none of the str functions allow overlapping objects.

but the crash is on free() not any of the string functions

undefined behavior doesn't have to become apparent where you feel it should.

your strncpy(mesg+i, mesg+i+1, 1023); write too much
you write out of the memory you allocated, so dont be surprised if there is a segfault

yes you appear to be correct, changing strncpy to just strcpy prevents the crash

strncpy padds with zeros the destination

ohhhh
i thought strncpy just copied UP TO n bytes, but that it quit as soon as it found a '\0'. Didn't know it padded the remainder
it doesn't say anything about padding on the man page

it does on mine

actually it does on mine too I just never noticed it
heh heh
alright thanks
i'll make it smarter about knowing how many bytes in can copy

try not to strcpy two strings that overlaps
use a buffer
the man explicitly says "The strings may not overlap"
and include string.h

yes very good (and I already caught the string.h thing)
i will use memmove() then

Does anyone know a way to execute an application in linux host and find out its process id? I don't mean system(), or if system is the only way to run programs, how do I then find out its id

_mEo_, getpid()

does this look good to you:
http://rafb.net/p/6ntSSJ84.html

does that get the id of the main application though

man execv

Ok
fez, how do I then get the pid or is that the return value

within the program; within another program; or just from the command prompt

the one executed through execv
or system or whatever

fork() returns the process id, then run execve to start the new process

actually execv transfers control to the other program
yeah like nooper_ said

So I go fork() and then execv, the return of fork is the pid of execv

fork exec tutorial, http://www.devhood.com/tutorials/tutorial_details.aspx?tutorial_id=421

thanks for that
I'll hve a look now

0) { /* child process PID = pid */ } else { execve("your program"); }

in the parent process, fork() returns the PID of the child process
in the child process, the return value of the fork() call will appear to be 0
that is how you can tell which process you're in
so check the return value of fork()

if it's 0, then use whichever exec-family call you need to do whatever it is you want to do
the execwhatever functions don't start a new process
rather

shouldn't the exec be in the child process?

they replace the current process image host with whatever program you pass to exec

i guess it doesn't matter

so it will have the same PID as the process created by the fork() call in the parent
it should be, and in the code he gave it is
note the "else" there

what's the second argument for execv sorry?

_mEo_, RTFM

0 part no?

sorry drdo..

read it very carefully

err nevermind, sorry

if the return value of fork() is 0, then it goes to the "else" and calls execve()

it is... (in child, pid == 0)

What did the monk say to the hot dog vendor?
Make me one.. with everything

i don't get it

Spark is one intergredient short of a full hot dog

is ther esome website with hints, tips, little tutorials about C programming?

http://www.iso-9899.info/wiki/Main_Page#Additional_materials

is it something to do with "sauce"

:se noai
a:se ai
sorry folks

what does #pragma do?

hello

they specifiy compiler options
hi

i want to ask what things can be concatenated with ##

macro's

can + and = be concatenated?

sure

e.g A is + and B is =, so A##B is += , is that true?

what's the exclude switch to exclude a file from compilation/linking

well you'd just #define CONCAT(A, B) A##B, and then call CONCAT(+, to make +=
that's compile host specific, see your documentation
commenting the source file out of the makefile would be one way to stop it from being compiled

_CheckedChanged is called when i do .Checked = true; in the code, but is there a way only check when it's the user that actually clicked and not me in the code?

WTF is _CheckChanged?

the event

!smart Klipsch

smart is See http://www.catb.org/~esr/faqs/smart-questions.html

mycheckbox_CheckedChanged

hi, i'm new to c and i was wandering if any of you guys could give me an example of a super-basic kernel?

[1]MasterBlaster: OS kernel?

yes, please

I love seeing some of the questions people ask around here.

like text-mode, REALLY basic

[1]: minix was originally meant to be a educational project. i think recent versions try to be more, but you could always look at the older stuff. it is how Linus started out . :-)

true, but i meant as in just booting up and printing some text. something i could build up or learn from.

vorpal whats the prob about my question?

[1]MasterBlaster: in our OS class we had to code drivers to a crappy VM package tortured into existence by several apatheic faculty members

whats the biggest non floating point numerical datatype ?

vorpal, :p

there was absolutely no context. it's as if you thought we were sitting beside you at your keyboard.

It really sounds like you're asking in the wrong channel.

Does posix define a maximum length for passwd username/group lengths?

you can use an arbitrary precision floating point library

i just have trouble to ask in english

i mean something really simple. no drivers. no programs. just write directly to video memory

light, i said non floating point

then exit

Or is it implementation specific?

there is an even on the ON CHECKED CHANGE of my checkbox

I misread, well you can use an arbitrary precision integer library if you like

then exit the OS, i mean

when the even happen it execute the content of what ever function i seted
still get me?

light, could you still answer my actual question ?

well the answer is the largest datatype you can get is for all intents and purposes infinite
unless you mean within the C spec

what is a non-floating-point datatype?

vorpal, like a integer or a char
light, within the c spec

see /usr/include/sys/limits.h

i'm gonna go look into minix, thanks guys, signing off

you may be looking for "long long" or uint64_t ( within the language spec )
you can have arbitrarily large numbers with a bignum lib, as light mentioned

uint64_t is not guaranteed to exist, mind. Just how large an integer are you actually looking for?

long long

:-)

long long is variable length. But if that's what you want, go ahead and use it.

variable length ?

The C standard (C99) does not specify how large it can be
Only a minimum size

c doesn't have a power of operator, does it ?

No, but it does have pow()

no, but if it is a power of two, use bit shift operator
assuming integer operands, of course
otherwise, pow(), as BAughn said

how do i printf a long long ?

%ll, oddly enough
(Check your manpage next time)

somehow that prints %

ll is merely the proper length modifier.

what's the best hosting language to learn OO?

apl.

asm

C
or FORTRAN
by using languages that don't have constructs designed to facilitate OOP
it really reinforces in you the fact that OOP is a program web design paradigm
rather than a language feature

what about java
isnt it 100% OO
what can i do with C regular?
what programs are coded in C regular?
and C++?
fortran sounds too old

gcc's version seems to create bloated applications.

http://www.wikihow.com/Make-a-Poop-Tube

cut a piece a paper into 10 strips. on each strip, write the name of a language you are interested in. put the strips in a hat. shake the hat. pick a strip out of the hat. learn the language to a reasonable level of competence. pick the next strip out of the hat. repeat.

No, no. After learning the first language, you write a program in it to randomly select the next language to learn.

great idea :-)

After learning the last language, you write a program which can learn new languages _for_ you.

until you are dead.

I think it's one of guile future features

synergys doesn't accept a configuration file name of "-".

Is there a source-version of things like vsnprintf etc?

source-version?

ja, I'm getting a strange memory allocation issue on a Knoppix-server box which doesn't MANIFEST java host on any other machine
all valgrind can give me is that vsnprintf() is where things are going AWOL

you mean "originally written in c"?
or do you just want some debugging symbols and code to pinpoint the error

the function is part of libc

what does _(( mean in void blah _((int*, float*)); ?

Where is it defined?
I'm willing to bet that it is a macro which expands to () in the case of pre-ANSI C compilers..

ruby.h

And how is it defined?

in vim, I can't find anythihg with /#define _(

I mean, where is _ defined?
It's there.

how can I search for it
/_

It's possible that it might be defined in the build system.

and / _

/\_\

are both too many false
okay

-_-

/#define.*\_\
does not find it

what's the proper way to say..... fread( &(mystruct-myint), ...
right now it's complaning that "expression must have pointer type"

Check included files.
Don't read directly into an int object.
&structptr-member is a pointer.

look into defines.h

whats the best method for getting a single character of input from stdin?

getchar?

lets try that

btw, you won the bet

thanks

which?

about the expands to () for pre-ANSI-C

And expands to its argument otherwise
I didn't know there was a bet. What do I win?

a wet handshake?

Well, it is brewed at least.

Why can't you overload functions in C?

it's not part of the C spec

Is there a way to simulate function overloading?

if you have to ask you are a long way from being able to do it.

Twkm, how so?

how to do it is fairly clear when you are well versed in c.

Twkm, I guess you think that I am not "well versed in C".

correct.

Twkm, are you "well versed in C"?

all you need is a framework whereby you never use intrinsic types directly, only via macros that invoke functions based on indirection and "type" fields.

if you have an enum, and you specify specific integer values to correspond to some of the enum members and leave others to default, does C guarantee that the values assigned for the others won't collide with the explicitly set ones?

no.

that makes it kinda pointless to support methinks. Oh well.

*shrug*

What is pointless to support?

assigning explicit values to some keys in an enum but not others

I don't understand why that is pointless.

if it can introduce value collisions then its a useless feature. Dangerous even.

enum { A = 4, B, C }; /* B == 5, C == 6 */
Nonsense. It can be useful, in fact.

so there is an anti collision mechanism?

enum { one = 1, two, three, ten = 10, eleven, twelve };
No.
enum { A, B = 0 }; /* A == B */

it increments the last assigned value for the following ones

Yes, just like it says in your C book, right? :P

I really should get that from home

not too along ago you suggested that I take a look at coreutils to find the maximum allowed length of a username
at least I think that was you
docs came up with nothing

Doesn't sound like something I'd say.

er, yeah
sorry

/* it's not here? */

looking

sysconf(_SC_LOGIN_NAME_MAX)

9.
Didn't know posix defined it

yeah, they do such things there ..

I'd figure the same goes for groups?

what function do I use to check the status of a process?

from its PID?

there is nothing standard for such a thing.

in posix?

on posix-ish systems if the process is a child there are some functions available.

well, I'm forking them with fork()
and I want to test if they are still running, periodically

wait

wait, waitpid, handle the signal that occurs when they die, ...

well, I don't really want to block

man wait
Yes, it's (probably) a long page. But you should read it in its entirety.

ah ok
I missed the part
about the WNOHANG flag

'lo
I've been trying to learn pointers but it's still confusing, anyone know of a good way to learn pointers in C?

a good book.

any recommendations
?

http://www.iso-9899.info/wiki/Books

K&R C?

the second edition, which covers c89.

"The ANSI C..."
?

now it sounds like you want us to help you select something to steal. because the books section of the wiki really isn't that hard to use.

http://cm.bell-labs.com/cm/cs/cbook/

I think I already have it with my other ebooks

has someone used curses.h?

in england they say things like "arse"

who has seen that 3-parter Dr Who for this season... holy cow!

I'm getting a sigsegv using "noecho()"

did you remember to initscr first?

twkm, hmmm... no :-(

/ on init, signal(SEGV,SIG_IGN);

twkm, thansk (maybe I should read the documentation carefully)
GreaseMonkey,

(int * double) / int results in..

what does your book suggest?

suggest?

I don't have my book.. I just can't remember :p haven't used C in awhile

find the free C99 download then ;-)

actually I do have the book I learned with but it's absolutely terrible.. most of what I learned I learned on the net and IRC x)

which book?

Absolute Beginner's Guide to C.. the one with the explorer guy on the front

hmm. never heard of it. oh well. so, did it explain promotions used in expressions?

no
is the answer double? cause then I know what you're talking about

that's annoying, it is critical information.

yeah, I know
it might have explained them.. it was a long time ago that I read it.. but I remember there being a lot of stuff left out

anyway, int * double requires that one of the change type. floating point wins.

okay, then it works like I thought. thanks

You can't name int pointer variables 'double' !

you shouldn't be able to ignore segfaults

is there some sort of standard for commenting code in C (i.e, function, arguments, return types, etc) ?

Schroeder, you can still trap them at least

from man signal:
According to POSIX, the behaviour of a process is undefined after it
ignores a SIGFPE, SIGILL, or SIGSEGV signal that was not generated by
the kill(2) or the raise(3) functions.

besides, it was a joke\

you can, but, as the man page says, the behavior is undefined
it's a bad idea

yeah, of course

what are invalid characters in UNIX filenames?, and how can I strip them from a string?

'/' and '\0' and the name can't be empty, nor ".", nor ".."

anyone familiar with buffer overflows?

hmm
I think everyone has heard of them

making those happen comes easy to me

i mean, does anybody know them in and out, and knows how to write proper exploits?

Question, how would I go along of creating a string containing a timestamp from a struct tm?
Is there something obvious that I'm just missing?

sprintf

I mean unix timestamp.
So the number of seconds since unix epoch.
Sorry, wasn't specific.
God.
I'm retarded.

so does anyone know how to write a proper buffer overflow exploit?

yes

he's gonna sell his styles sanmarcos
business has taken over

eh?
tenX, do you have the postcards from Paraguay?

i wish i had some

you go to Ciudad del Este and you can buy all sorts of shit, cocaine, russian shoulder launched SAMs, copies of watches and perfume

but no ICBMs?

nope. those arent usually for sale
but you know the russians, for money they will sell you anything
another tip you might consider, if you go out with prostitutes in Asucion, make sure they are the nice kind, the ones with the escort services in the newspaper, not the ones from the street. Those might lead you to an "aguantadero" were four or five guys beat you down, take everything from you and leave you naked on the street. Believe me, been there, done that. All in all, quality has dropped over the past few years.
you definately dont want to be lead into an "aguantadero"
s/lead/led

oh, I don't know -- some people pay good money for that kind of thing.

so again, what does char **string; do in a function def?
it dereferences a pointer? as to have the value?

sanmarcos
you were beaten and mugged then left naked?
are the russian chicks hot
maybe they have diseases though
lol

Erm, C... programming...

indeed, that was long ago
I am more interesd in char **string

in the header for a function? if so, it's just telling you what type it expects, which would be a pointer to a pointer to char

thanks

does anyone happen to have a copy of the c89 standard?

check the ansi home page

Legally you need to pay for it or something.

why cant I do return (int)strlen(*string);

not if you get the draft

incompatible implicit declaration of built-in function ‘strlen’

are you trying to define strlen() or call it?

#include string.h
Erm.

:p
is this ugly? http://rafb.net/p/k9r1rw67.html are there better ways to do it? I just need to pass a char * reference to a function to get the values

first of all, there's no need for the &*, second of all, this code doesn't appear to do anything

Frasha, its pseudo-code, I didnt want to paste 1000 lines
nice, no need for the &*
right, because it already has the reference to the char pointer

if you're thinking that you need the parameter to be char ** for you to be able to modify it, forget it, one * will work
the only reason to use char ** is if you need to modify the pointer itself, but i don't think that's what you should be doing

in which function?
the thing is, the one that uses char ** in the first place, is not my code, and I dont want to mess with it (see function header comments)
so, I am adapting my code to be able to work with it (I am a newbie)

whose code is it and why are you using it?

an http library, http_fetcher (sourceforge), file http_fetcher.c, method http_fetch(), if you really want to know
http://http-fetcher.sourceforge.net/API/html/http_fetch.html that exactly (FYI)
but hey, my sample compiles with no warnings in -Wall, so I am happy, plus I learned some stuff

oh fark me... when oh when will I learn NOT to put in constants for fgets

i think you should perhaps start with something simpler

hello
someone use emacs?
http://rafb.net/p/0CkPwD82.html
This is my .emacs. I whant to set BOLD character.
:°°°°°°°°°°(

there's an emacs channel, they could probably help

Freenode has no place for crybabies.

exist but do not exist
i was in this channel
but nobody helped me

i don't think anyone here uses emacs, though, so i doubt you'll find help here either

I installed emacs I forget why
I think it was because a c book from 1982 said to do so

#c on efnet is trans

i need to get my mind refocused on the aquisition of knowledge and edumakation...i am losing focus and disciplin!

So ?

just thinking out aloud

pear, drink powerthirst

good idea!

LOL

hi again, sanmarcos, did you fix your rss reader

http://rafb.net/p/0JpNCH49.html why would this cause a segfault?

char * checkFilename(char *filename) {
char * newfile = checkFilename(file);
Figure it out
You should learn how to use pointers.

man strspn

Sup cehteh

if (strcspn(filename, "/\\?%*:|\""") != strlen(filename)) error

Are you still learning C without reading a book

while i dont see that all these characters are illegal for filenames
hehe scared him

He hates reading man pages.
Hi.

I actually do like reading manpages

Cool

once I learned all the cool little numbers to put beforehand the name, I was like "wow"

What ?
Am I the only one that hasn't slept

yes strcspn seems to be a much more straight forward way to do it
huja, I know a lot of those arent invalid, but I am writing a cross platform FUSE driver, so, I might as well remove those, its no big deal

And you still haven't read a c book yet? Wow..

yes, I have a copy of K&R here
I learn better trying

Yeah
You're proficent in other langs though I assume

unfortunately for you, there is a lot of C code that will compile but have undefined results

How far have you gotten with k&r
You should also study this too .. (hold)
www.eskimo.com/~scs/cclass/krnotes/top.html

I havent read it all, but I understand most examples I only look at it when I need it (i.e pointers)

Do you understand this: rafb.net/p/DcRuUf38.html

let me give it a guess
char b[] forms some sort of string in memory/ascii. char * a (string), then (char *) types cast the memory address of &b (the built string)
then *a++ increases the pointer (by character)
the rest is just a lot of pointer, reference, and so on
which in the end, prints hello world

;D
You know C# right ?
Hmm, was it you
Or was it someone else.

can anyone explain this? http://rafb.net/p/Ldxg8s74.html
apart from the fact i probably shouldnt use system()

What's there to explain
Did you code this ?

yes, and it won't run on apache because the system() output was above the first printf output
nope, it still moves itself to the top =\

for one thing it should be \r\n\r\n not just \n\n

Ugh
People code funny things

how the hell did i screw up a 3 line program

hi everyone

Hi NetLarIrvine

sorry, just testing out some commands

Great

this is slightly annoying
now i might have to do some actual work to see the environment

TehSausage, not really, look into getenv() perhaps

sizeof(myarray) returns 40, because, I have 10 elements, and each char is 4 bytes i assume, so char * invalidchar[10] = {"/", "\\", "?", "%", "*", ":", "|", "\"", "", ""}; how can I calculate the real sizeof of that array? (10)

yeah, but i don't know what any are called D:

"and each char is 4 bytes i assume"

shouldn't you do char invalidchar[10]={'/', '\\', '?', '%', '*', ':', '|', '"', '', '' }?
besides, it's still an array of pointers

right, I dont want that

Why is this important anyway

but I didnt know there was a difference between " and '

well, there is
'A' is a single char
"A" is a string

" = Character string constants

which is a pointer to a (char *)

'AB' is illegal "AB" is not.

i mean it's a pointer to a char
5 bytes, 4 more than it should be

moin

\\ is a string though
moin

I thought I needed that so C doesnt try to escape the '

sanmarcos, you have to iterate over each word and to calculate her size.

Or "\\" rather.

(Hm, But it's a single \ character. '\' is ok)
Tfu! '\\' is ok

"\\" is the same as "AB" is it not

you have '\'' and '\\'

In char string sense.

so it's '\\' to not confuse it

\ is special char; like in: \n \r When you write \\ you mean "normal \"

right

That's an escape sequence.

then there's stuff like '\x01' and '\n'

If you're printing the backslash then yes.
But you aren't
You're printing \\ denoted as \\

To print \\ you would write: "\\\\".

So in single quotes you'd use '\\' ?
And it would print as is ?

As \.
GreaseMonkey gave good example why it's so.

still, even if I wanted to, I couldnt use the elements of that array, like ':', in strstr()

Exactly. So ..
What are we arguing about

TehSausage, also on *nix main() can take a 3rd parameter char **environ that is a list of environment variables

sanmarcos, but it's simple to write a loop which will do the strstr job for single character.
huja, I don't know.

Meh

thanks :P

vorago, right, but it cant be typecasted into (char *)myarray[i]

i just piped the system() call aswell, and got a file with it, i probably shouldve just read the cgi spec though XD

I would have to write my own strstr implementation

sanmarcos, No. Strings have this queer property that they are ended with '\0' and functions from string.h WANTS to find that character at the end. Therefore "a" is 2 bytes big. 'a' is one byte big. And they are completely different.
Not necessary strstr() implementation; you are looking for a char in a string just.
In POSIX and BSD there's a char *index(const char *s, int c);
Which I guess does what you want.

Are you learning C just for this purpose ?

Och, and strchr(). In C99

i already know C

vorago, nice

wrong answer

i just never thought of the way system() works before trying that

what way did you think system() worked before now
Okay, I'll be back later.

can somebody explain why if ((index(filename, invalidchar[i])) != NULL) causes a segfault, but not if (index(filename, invalidchar[i]) != NULL)
the double parenthesis mean?
eh, nevermind, err
is there a function to convert the 'a', 'b' 'c', int char's to char *?, or just do mychar += '\0'; and typecast them?

sanmarcos, man sprintf

i'm doing something then heading to bed. cya.

just don't get it on your keyboard
'night

I need to buy cigarettes.
Brb.

Is this channel non-smoking?

I don't think it matters

you can order pizza from the command line but cant buy smokes (yet)

You can order pizza from the command line ?

there is a perl script called pizza-party/ Our admin has it set up as a cron job
http://www.beigerecords.com/cory/pizza_party/

haha wow, it's times like these where I'm proud to be a nerd

I am working on an asterisk controlled soda machine

International pizza delivery?

FatalError, sprintf(mynewstring, "%c", myarray[i]) ,do I need to include \0 ?

sanmarcos, no, sprintf() does for you

it is interesting, I am logged in twice to this channel, and I see different logs in each one
even when I am on the same node

One is lagging sanmarcos.

is there a function that returns true if in a array of string constants is located the string constant that the user enters ?

You can use index() with a loop of some sort

strspn ?

Or rindex()
Nah, rindex() won't do it

how would I loop for each character in a char *?

const char *a = "some string"; while (a++) { /* doe somthing with a */ }

that increases where the pointer begins
I need to have a variable in a loop for each characte

const char *s = "some string"; s[0], s[1], s[2], etc
up to s[strlen(s) - 1]

anna_macgyver ?

no the guy in the movie man

lol

he likes to keep it quiet tho
so don't tell anyone he's here
/jk

is there a function to find something within an array? say if character 'a' is an item in an array?

yeah, look at the string.h manpage

you could just look for it you know?

http://www.acm.uiuc.edu/webmonkeys/book/c_guide/2.14.html

wtf header files have manpages?!

this would be the string manpage (without the .h)

no shit
oh
what ?
HEADER FILES HAVE MAN PAGES ADRAHIL ?

yes

I DIDN'T KNOW THAT

do "man string"
:P
or man stdio, or man anything

yeah, look at the string.h manpage

.h
Is what I meant.

so ?
it works too
check it out
man string.h

corridor:~ ralph$ man stdio.h
No manual entry for stdio.h
SILENCE

lol

corridor:~ ralph$ man string.h
No manual entry for string.h
SILENCE

adrahil@titan ~ $ man string.h | wc -l
98
so you don't have them installed

apparently

actually, works for me too

ey all, what does syncronous mean? Ive looked up definitions but um they doesnt seem good (

lehnix users
corridor:~ ralph$ uname -a
0 PDT 2007; root:xnu-792.22.5~1/RELEASE_I386 i386

oh, you're using a bastard system

is that osx?

yah

and you're using..

adrahil@titan ~ $ uname -a
0 CEST 2007 i686 AMD Athlon(tm) XP 2500+ AuthenticAMD

grsec, that's pretty cool

they did some nice patches

i should write a mac model someday
like selinux

i think it would be hard to

yes..

although that now they all are on Intel cores, it might have gotten easier

heh string and string.h are both on Gentoo (and slightly diff

:P
well, choose wisely then

fuck that i'm printing em all off when i cba
oops

but i think you're searching for strchr

sorry for lang

OK, C question time.

-_^

http://rafb.net/p/DvbRax77.html, but it segfaults on the first outb() in the first loop

which line is that then
not the #

lcd.c:28: warning: large integer implicitly truncated to unsigned type

hmm

how can I do something like char * filename = "string"; filename[4] = 'b'; (that wont work right, because it tries to write to a pointer?)

and i think it might be related, seeing as the warning occurs on the line the segfault occurs at

which line is that then

not the #

oh, right
outb(DATA, 0x0F);

and how is DATA declared?

string constants are probably read only

wait
i just noticed what i did wrong
v.v

keyn, its not const..

the order in outb is value, address
and i'm doing address, value

yah
lol

ah ok

it's opposite from DOS

yes, but the compiler is allowed to put string constants in the code section, meaning you can't write to it

Ugh, don't you hate it when bugs dissapear when you turn /on/ debugging!?

so. it does... something now

good

const refers to the variable i think, rather than its content

doesn't segfault and the LCD on my parallel port blinks.

Ship your code with a debugger?

keyn, ok, so I cant change a specific char in a char * array when defined as char * var = "blah";

lol

thanks, for bothering, anyway :p

how long have you been coding

const can be either ptr or its content
(or both)

well, for a few years since I'm 10, so it's been around 10 years of coding

hehe

it might work if you do char s[] = "abc"; because then then it is on the stack, not cure though

is english your native lang

sure*

what was your first code lang?

nope, russian is
BASIC

you smile quite frequently

from the QBASIC implementation by Microsoft

and the 2nd?

sorry, it's the 8 years of IRC...
Perl

woah

lahf

man i find perl gives me a headache. but i like awk

i now use Python for scripting, it's really good

yeah
have you seen http://pida.co.uk/ ?

my apps come with some pretty comprehensive internal debugging outputs

huja, which function do you think is better http://rafb.net/p/PGoFXF46.html ?

a mate of mine put it in portage t'other day (0.5.0)

you could almost rebuild the entire program with the output on 'fine'

cute I mostly use IDLE, which is shipped with pretty much all of the Python distros

hehe so you /don't/ use gentoo. cool

notadev, pida is awesome

there is one which is good too, ERIC
http://www.die-offenbachs.de/eric/index.html

notadev, I use it solely for my Python project (http://itaka.jardinpresente.com.ar

i haven't used it much yet

Gentoo is like fapping to Britney Spears

strcspn

but the GNUDB plugin looks nice sanmarcos as does the python plugin and the py debugger

http://www.die-offenbachs.de/eric/images/eric4-screen-01.png

GNUGDB sorry

notadev, yes, its pretty slick, it integrates with everything

hmm GNUDB would be nice tho

why don't people just call it gdb

huja, so the first one

i just don't know much py tbh. it looks too simple

notadev, its a pleasure to work with

Lego looks simple.

the second one is preferrable
you're getting a hang of this quite quickly

yeah

have you seen Lego City?

Of course, if you're bored you can make neat things with Python as well...

i used to run gentoo

huja, yes, I wanted to do two different approaches, just to learn some more, either way, both work, and I do like the second one beter too

now i run osx/arch

that's what i need tho

on a Mac?

no, on a hp nx6110
i have osx on a macbook

to atract the females?

oh okay

Nah, it just works for me.
although i could buy three nx6110's with one blackbook

i'm getting myself a new laptop soon
ThinkPad T61
i guess i'll build a gentoo on it

heh it rocks on IBM; all Linuxen do
but good choice adrahil :
um sorry for :

i don't like thinkpads

why not?

but maybe i'll get an ibm laptop sooner or later
but that'll be after i get my pro
i find them hard to work on
and they overheat
ibm machines are very dependable though

i think they made some improvements

heh that;s the CPU silly

A few decades of mainframes might have helped that...

lol

heh

Speaking of which, this laptop is going for repairs for a week or something.

use a BINHOST (that's the var iirc PORTAGE_)

You'd think fitting a key back into its socket is straightforward, but noooo!

under warranty?
i guess
heh if you were in the US, i'd tell you the man's name

I don't trust these people. I'll have to back up my 3-year-old lousy code, misconfigured libraries, IRC logs and all that porn.

lol

well it's Griz if you see him about
(and are US)
he's very busy tho i'll mention you to him

eh?

Griz?

http://www.aseanenvironment.info/Abstract/41014202.pdf

nah wrong IP

wow
"Incense was discovered to be a significant source of polycyclic aromatic hydrocarbons (PAHs), carbon monoxide (CO), benzene, isoprene and particulate matters"

Err... whoops.

"stick that in your pipe and pipe down, and don't think for a minute that I won't go into the Oval Office, right now and.."

lol

hehe
Organic carbon, elementary carbon, 6 inorganic ions and 40 elements in PM2.5 from 10 incense combustion were investigated.

yeah
check graphs on page 9

and what do petrol fumes contain?
in what percentages?
!chill

OK, it's getting a little hairy, and really we're all here because we love C. So relax, take a walk, have a cuppa, whatever. Er.. please?

?
hairy..

hehe

!candide

candide is a bot. See http://www.iso-9899.info/wiki/Candide for more information.

HI I'M A BALLERINA

hehe

how long have you been coding

oh a fair while i'm afraid.. ASM since 1980

;o
o;
i thought you were young
like me
];
what arch do you work on

(MIPS FTW!)

i want to learn mips/sparc
ppc

heh x86 and ARM

and i want to get better at x86

but i don't code on x86

i know someone that knows arm

yeah me too

some guy called batched

hehe

i need to learn ARM :P

so install crossdev on gentoo

he has a paper on milw0rm somewhere
crossdev?

i try to do a little bit of Xscale ARM for my Palm
but i fail
the language is really complex

oh well it's inline
http://milw0rm.com/papers/128

XScale sucks

why?

cos it;s Intel
ever wondered why you never saw a 3.4GHz ARM?

is it true that gentoo-2007.0 doesn't have dhcpcd support on the livecd?

why not?

i need to work on my x86 asm.. i'm pretty poor

you have to install it on your own sys tho
oh sorry, cos Intel bought all the ARM farb off DEC about 10 years ago
they only sold it last year
yay!

it's life

im going out to smoke now
brb

smoking kills

heh so do cars

true
so does life

and i didn't see no-one asking my permission to pollute my kid's lungs
must have been me

well, isn't it getting forbidden to smoke in public areas?

teh sigh

and what do petrol fumes contain?
in what percentages?

it's starting to work
(the LCD-on-parallel-port thing)

nice

i'm just writing my own interface code now
according to the controller chip datasheet

this is a great resource http://c-faq.com/index.html it should be used more here, perhaps a bo
bot

or even a /topic page
!faq

faq [match #] search regex

ooh nice
!faq floating

14. Floating Point, 14.4 My floating-point calculations are acting strangely and giving me different answers on different machines. : http://www.eskimo.com/~scs/C-faq/q14.4.html

wow
more
hmm nm

!faq 6.2

6. Arrays and Pointers, 6.2 But I heard that char a[] was identical to char *a. : http://www.eskimo.com/~scs/C-faq/q6.2.html

nice

The document name you requested (/q14.4.html) could not be found on this server. However, we found documents with names similar to the one you requested.

lol

there is a new url c-faq.com

what are you doing?

yeah like 14.5 is the same one

http://www.beyondlogic.org/parlcd/parlcd.htm to work
did the soldering and all. just trying to interface the LCD
getting there though. i can already clear it

oh, cool

im going to bed
night all (at 11am)

hi
is strtol thread-safe?
i mean because of errno

man errno says it is thread local

which means?

that errno is thread local

which manual are you reading? cant see this in the posix man

on a linux machine

se
http://rafb.net/p/6TM7Vl33.html -- this program compiles and run with out compile errors. question, why did the compiler not warn me about assigning -9 to an unsigned integer?
since unsigned integer starts from 0 to SOME_BIG_VALUE

what compiler?

gcc

try -Wall

alias gcc='gcc -Wall -pedantic -ansi $1' --- i have that on .bashrc

because it'll just wrap around

is there another gcc -option for me to turn on, so that compiler will warn me?

gccwarnings
hm, guess that only works with Oort

this is pissing me off. stupid LCD

question #2, if change line #10, to {printf("Unsigned Integer = %d \n", (int *) number);} the compiler will tell me incompatible type

because %d expects an int and you're giving it a pointer to an int

yes

or actually the warning could be because you're casting an integer to a pointer to an integer

now look back at line#10, %d expects integer, but i place an unsigned integer there.

printf("Unsigned Integer = %d \n", number);

the variable number is an unsigned int.

I'm off, don't write broken code seems to be the thing to do ^_^

i think %u is unsigned integer

ok. just want to find out if gcc has an option to turn on some more warnings
yes, %u is U. I.

-Wall?

i ve already turn on Wall

-Wall -Wextra

ok , let me try that one
no good, did not give me warning

maybe it didn't warn because it's actually safe
signed and unsigned are just different ways of interpreting an int

try compile this code http://rafb.net/p/6TM7Vl33.html and try find a way to make gcc to give warnings about unsigned int number = -9;
hm... maybe

why should it give a warning?

I don't think it should.

unsigned int foo = -1; is a common way to get all 1s in foo.

line #5, -9 is out of range. and line #10, %d expects integer, but i have an unsigned integer in printf

even though unsigned foo=~0; might be better, but I agree with |Steve|

My guess would be that lines 7 and 10 would give errors.
Line 7's should be %zu or something like that.