Lowyat.NET: Latest topics by ikanez

segmentation fault while running C code in Cygwin

ikanez — Fri, 15 Jan 2010 04:02:57 +0800

Hi All,

This is like my first posting in C here, so please don't flame me

Currently I've been trying to run this piece of code which I've gotten off a book but keep getting a core dump when trying to run in cygwin. Tried to run in solaris, and in core dumps too - hence it must be something wrong with the code.

Anyhow below is the code. It's basically a unix more command. From what I know so far, is that it starts to hang when it gets to the see_more function, but i don't know what wrong with it.

//more version 0.2
#include <stdio.h>

#define PAGELEN 10
#define LINELEN 512

void do_more(FILE *);
int see_more(FILE *);

int main (int ac, char *av[] )
{
FILE *fp;
if (ac == 1 ) {

do_more (stdin);
}
else

while ( --ac )
if ((fp = fopen( *++av , "r" )) != NULL)
{
do_more( fp );
fclose( fp );
}
else
exit(1);
return 0;
}

void do_more (FILE *fp)
{
char line[LINELEN];
int num_of_lines = 0;
int see_more(FILE *), reply;
FILE *fp_tty;

//memset((FILE *) fp_tty, 0, sizeof(fp_tty));
//reply = 0;

fp_tty = fopen("/dev/tty", "r");
if (fp_tty = NULL){

exit(1);
}

while (fgets( line, LINELEN, fp)) {

if (num_of_lines == PAGELEN ) {

reply = see_more(fp_tty);
if (reply == 0) {

break;
}
num_of_lines -= reply;
}
if (fputs(line,stdout) == EOF) {

exit(1);
}
num_of_lines++;
}
}

int see_more(FILE *cmd)
{
int c;
printf ("\033[7m more? \033[m");

while ((c = getc(cmd)) !=EOF)
{
if (c == 'q' )
return 0;
if (c == ' ' )
return PAGELEN;
if ( c == '\n' )
return 1;
}
return 0;
}

thank you in advance.

Laggish Linux

ikanez — Fri, 25 Apr 2008 15:10:48 +0800

hi,

i'm currently using 2 OS in my P3, 256Mb Ram PC. A Windows XP and Fedora 8.

why is it that everything in windows seems to be faster - especially firefox; when compared to linux? like it would take a lot more seconds to load a webpage in linux firefox compared to windows firefox.

i thought linux is much faster than windows? am i missing something here?

thanks for the help!

Yum on Fedora 8

ikanez — Wed, 23 Apr 2008 12:42:36 +0800

Hi there.

Currently I'm using Fedora 8. Previously I had this problem where I couldn't connect to the internet since i'm using my computer from behind a proxy server (back at my uni). So i kinda tinkier with everything i can get my hands on.

Newho, as a result of my tinkering, now (i'm using streamyx) - i can't get my yum to work right. don't ask me what i tinkered way back then - forgotten already.

If it helps, here my yum.conf file

QUOTE

[main]
cachedir=/var/cache/yum
keepcache=0
debuglevel=2
logfile=/var/log/yum.log
exactarch=1
obsoletes=1
gpgcheck=1
plugins=1
metadata_expire=1800
installonly_limit=2
proxy=

# PUT YOUR REPOS HERE OR IN separate files named file.repo
# in /etc/yum.repos.d

and this is the error msg that i got when i tried to run some installer in pirut

QUOTE

Component: pirut
Summary: TB76714bb2 config.py:80:__set__:ValueError: Error parsing '': URL must be http, ftp or https not ""

Traceback (most recent call last):
File "/usr/sbin/system-install-packages", line 355, in <module>
main()
File "/usr/sbin/system-install-packages", line 348, in main
pkginst = SinglePackageInstaller()
File "/usr/sbin/system-install-packages", line 63, in __init__
GraphicalYumBase.__init__(self, False)
File "/usr/lib/python2.5/site-packages/pirut/__init__.py", line 129, in __init__
plugin_types=(yum.plugins.TYPE_CORE,))
File "/usr/lib/python2.5/site-packages/yum/__init__.py", line 113, in doConfigSetup
errorlevel=errorlevel)
File "/usr/lib/python2.5/site-packages/yum/__init__.py", line 159, in _getConfig
self._conf = config.readMainConfig(startupconf)
File "/usr/lib/python2.5/site-packages/yum/config.py", line 617, in readMainConfig
yumconf.populate(startupconf._parser, 'main')
File "/usr/lib/python2.5/site-packages/yum/config.py", line 376, in populate
setattr(self, name, value)
File "/usr/lib/python2.5/site-packages/yum/config.py", line 80, in __set__
raise ValueError('Error parsing %r: %s' % (value, str(e)))
ValueError: Error parsing '': URL must be http, ftp or https not ""

Local variables in innermost frame:
obj: [main]
alwaysprompt: True
assumeyes: False
bandwidth: 0
cachedir: '/var/cache/yum'
commands: []
config_file_path: '/etc/yum/yum.conf'
debuglevel: 2
diskspacecheck: True
distroverpkg: 'redhat-release'
enable_group_conditionals: True
enabled: True
enablegroups: True
errorlevel: 2
exactarch: True
exactarchlist: ['kernel', 'kernel-smp', 'glibc', 'kernel-hugemem', 'kernel-enterprise', 'kernel-bigmem', 'kernel-devel', 'kernel-PAE', 'kernel-PAE-debug']
exclude: []
failovermethod: 'roundrobin'
gpgcheck: True
group_package_types: ['mandatory', 'default']
http_caching: 'all'
installonly_limit: 2
installonlypkgs: ['kernel', 'kernel-bigmem', 'kernel-enterprise', 'kernel-smp', 'kernel-modules', 'kernel-debug', 'kernel-unsupported', 'kernel-source', 'kernel-devel', 'kernel-PAE', 'kernel-PAE-debug']
installroot: '/'
keepalive: True
keepcache: False
kernelpkgnames: ['kernel', 'kernel-smp', 'kernel-enterprise', 'kernel-bigmem', 'kernel-BOOT', 'kernel-PAE', 'kernel-PAE-debug']
logfile: '/var/log/yum.log'
metadata_expire: 1800
mirrorlist_expire: 86400
obsoletes: True
overwrite_groups: False
persistdir: '/var/lib/yum'
pluginconfpath: ['/etc/yum/pluginconf.d']
pluginpath: ['/usr/share/yum-plugins', '/usr/lib/yum-plugins']
plugins: True
proxy: None
proxy_password: None
proxy_username: None
recent: 7
reposdir: ['/etc/yum/repos.d', '/etc/yum.repos.d']
retries: 10
rpm_check_debug: True
showdupesfromrepos: False
syslog_facility: 'LOG_DAEMON'
syslog_ident: None
throttle: 0
timeout: 30.0
tolerant: True
tsflags: []
yumversion: 'unversioned'
self: <yum.config.UrlOption object at 0x8adca0c>
e: URL must be http, ftp or https not ""
value:

is there any way i can "re-install yum" without having to reinstall fedora 8?

thanks all.

How to do the folder thingy

ikanez — Sun, 30 Mar 2008 17:11:54 +0800

hi all bloggers.

i have a ques here.

how can i alter my blog so that it can have like a separate folder but still under same root.

e.g

main site index: ikanez.blogspot.com
-> for tutorial purposes: ikanez dot blogspot dot com/how-to

for the time being i'm just using two separate blog
1. index : ikanez dot blogspot.com
2. tutorial : ikanez-how-to-stuff dot blogspot.com

i've been using blogger for quite some time now, so i dun wana open up a new account elsewhere.

can neone help?

p/s: if u hadn't notice, my blog is at ikanez dot blogspot dot com

How to become a Billing Consultant

ikanez — Wed, 26 Mar 2008 01:59:35 +0800

With reference to the topic title, I'd like to know if any of you have any knowledge on:-

1. What a billing consultant/solution architect does?

2. How does one go about on becoming one? I mean like a what's the career path gonna be like. What position will I encounter along the way?

3. What type of reading material should I be reading if I'm interested in becoming one. I realize that as I grow older, managerial knowledge will become much more important, as well as knowledge on the industry as well. Wonder if any of you have any good links/e-books/blogs/etc etc reading material that you guys/gals usually follow to gain knowledge or to keep urselves updated.

4. What's the life like? Sharing of experience would be nice~

Right now I'll be employed (not yet working, but soon though) as an analyst programmer at a telco company - an would like to someday reach that position. 5 years is my target. I dunno whether this is doable or not - so I guess thats open for discussion too.

Career Path in Programming

ikanez — Fri, 07 Mar 2008 18:25:24 +0800

would anyone here wanna share what the career prospect is for a analyst programmer? --> furthermore working in telco software company

just wana know how to advance my career once I become analyst programmer. the road ahead right now is quite vague for me, it would really be helpful if someone could clear this up - especially if they have the exp.

my research so far has revealed several routes, such as this one:

QUOTE

analyst > sr. analyst> consultant > sr consultnt > manager > solution architect

and this

QUOTE

analyst > system analyst > sr system analyst > solution architect

it'd be great if you guys could share ur taken path as well. might be a gud topic for discussion.

owh, n btw, after being in telco software comp for a few years, where can I later job hop? like for instance does telco operator accept people with my background? what of oil n gas industry then?

Who is in Comptel?

ikanez — Wed, 27 Feb 2008 02:34:24 +0800

I just went for an interview at Comptel the other day during my uni career fair. Does anyone here have any idea what the place is like and whether its a great company or not to work at?

Is anyone here from Comptel and can share their experience?

Anyone here know what their salary range is?

Basically please share any info on Comptel that you guys have. would appreciate it a lot and can even discuss about it here.

Career in Networking

ikanez — Fri, 15 Feb 2008 22:50:36 +0800

Hi, I'm wondering whether which one is a better option for me right now, working for vendor, or ISP (like jaring or TM)

I'll be graduating in 2 months time, but still undecided as to where to exactly go.

For those who are in the field, I invite y'all to share your experience. It'll be a good reference to me and those who want to build a career in networking.

What's next for me?

ikanez — Thu, 25 Oct 2007 21:01:19 +0800

Hi,

I'll be graduating next year with a bachelor in EE. Took a lot of communication subjects. Probably will end up with a CCNP cert too by that time as I am finishing my CCNA as of this moment.

I'd like to know what you guys think about where I should apply for a job, in terms possible companies that might be suitable for my set skills. And of course - provides a good pay. Im still undecided whether to venture into the IT industry or the telco industry - im keeping my options open i suppose.

Probably you could share your experience if my situation is akin to yours.

thanks.