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Right after the fork, both processes are identical - they are almost complete clones.

There is one important exception - fork() returns a zero to the child process. It returns the pid of the...

There are several very good books on Unix programming (There is no such thing as a Linux-only api like there is in Windoze for NT and XP)

In Unix there are system calls - this book does a good job...

try tr - maybe something like this


cat junkfilled | tr -d '\t' | cleanfile

will get rid of tab chars for example.

tr supports classes of chars - [:alphanum:] and you use these with
-c -d...

Consider creating a file of your points - looks like you can represent things with either char or bitmaps - to save memory. The smaller the impact on virtual memory, the faster your code will run.
...

This applies throughout all of Unix- and perl is just one instance of it.
Whenever you open a file for append, you can ONLY write to the end of the file, no matter where you seek. Seek will not...

I like www.codeguru.com

fgetc, getc are good choices:


char chy;
int ch;
printf("\nDo You whish for another calculations [Y|N]: ");
ch=fgetc(stdin);
chy=ch;
printf("chy=%c\n",chy);

I'm confused.

popen calling /bin/bash is practically the same as just shelling out another process - except that you're handicapped. You can either read output with popen, or send input to your...

That's actually production ksh stuff. I'm assuming it translates okay to BASH.

Simple SQL to get a value from a table in a shell variable:



UIPW="username/password@myoracle"
result=(echo |
"$UIPW
set head off
select blah from table...

There are MFC libraries for Unix boxes. It sounds like you have one.

Believe it or not Microsoft has some information on porting MFC apps to Unix.

...

#include <unistd.h>
pid_t pid
char *args[11]={"arg one", "option two"};
...........

pid=fork();
if (pid==0){ // in child process
execve("path/to/myprog", args);
// we do...

struct sockaddr {
unsigned short sa_family; /* address family */
char sa_data[14]; /* up to 14 bytes of direct address */
};



This is how sockaddr is...

Try something like this:


#!/bin/ksh
# script: ptest
# parameters:
# $1 - IP address to ping
# $2 - duration in hours
#
# figure how long to keep doing this

Compiler options, plus the code should not have a main() in it.

I could also be a NULL pointer to some variable, but it looks like a function pointer is aimed nowhere.

In either case, this is likely to be a plain old-fashioned bug. It probably has very little...

All of our HP-UX boxes have bash.

www.boost.org has a smart pointers class. These work only in C++, but you can read about how they are implemented. Smart pointers know how long an array is and the starting address of the array.
...

first off, for gdb to work, the code has to be compiled with symbols in the code

for C -


gcc -g myprog.c -o myprog
gdb myprog


Most production code is not compiled debug, so trying use...

Never hard code passwords; never, never su paswords. It's like saying, here trash my system.

Did you try uniq



nbtscan -s : -v 192.168.6.30-254 | grep -e "computername" -i | \
sort | uniq -d | awk -F: '{print $1}'



Or something along those lines

since I hate typing assume your known_value is an md5 hash result 16 bytes long: 01 02 03 04 05 06 07 08 09 0a 0b 0c 0d ff 11 11
Try:


#include <stdio.h>

int main(int argc, char *argv[]) {
...

Unless you are running only on BSD systems, consider using memcmp() instead. bcmp() may go away in the future.

This help at all?



unsigned char test_value[17];
....................
if ( !...

We need to know - Oracle? MySql? Access? what database?

Not all SQL is the same, especially date functions.

FWIW -

Always profile before you try any optimization, whether by changing your code, or asking the compiler to speed things up. Try changing your code based on what the profiler finds is a...