09-30-2016
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
I have data that looks like this
aaa!bbb!ccc/ddd/eee
It is not fixed format. I need to parse ddd into a var in order to decide if I want to process that row. If I do I need to put ccc and bbb into vars to process it. I need to do this during a while loop one record at a time. Any... (11 Replies)
Discussion started by: gillbates
11 Replies
2. Programming
i am trying to use the history functions in a c++ program along with a custom signal handler for SIGINT.
the prog works fine catching signals without the line:
add_history(*args);
but as soon as this line is added, the prog segfaults on SIGINT.
does anyone have experience using gnu... (2 Replies)
Discussion started by: a1g0rithm
2 Replies
3. UNIX for Dummies Questions & Answers
Hello, sorry if this has been posted before but i was wondering if there is a way to run a program until a segmentation fault is found.
Currently i'm using a simple shell script which runs my program 100 times, sleeps 1 second because srand(time(0)) is dependent on seconds. Is there a possible... (1 Reply)
Discussion started by: aslambilal
1 Replies
4. Solaris
We have a Solaris 8 server which users login to via VNC to get a desktop. On that desktop these users use Netscape Communicator 4.9 to access a very important mail account. Unfortunately Netscape has started segfaulting regularly.
Does anyone have any ideas how I can try to find out what point... (1 Reply)
Discussion started by: aussieos
1 Replies
5. Programming
1. Even if i have the handles for ctrl+c it gives off a segfault
2. syslog doesn't log LOG_ERR event with log masked specified or non specified, it logs LOG_WARNING however...
#include <sys/types.h> /* include this before any other sys headers */
#include <sys/stat.h>
#include <fcntl.h>... (2 Replies)
Discussion started by: james2432
2 Replies
6. Programming
Hello everyone,
I'm writing a program using the id3lib unfortunately I've encountered with memory issue that cause segmentation fault. I tried to rerun and analyze the program with valgrind but it doesn't point me anywhere. I really stuck on this one.
Valgrind output:
==14716== Invalid read of... (2 Replies)
Discussion started by: errb
2 Replies
7. Programming
I have a program that allows users to specify the debug log file location and name.
I have tried using the access() and stat() but they both segfault if the drive say (d:\) is invalid. Both seem to be fine if the drive exists.
Could someone please point me in the direction to a function that... (1 Reply)
Discussion started by: robfwauk
1 Replies
8. Programming
hello all,
my question is not about How code can be rewritten, i just wanna know even though i am not using read only memory of C (i have declared str) why this function gives me segfault :wall:and the other code executes comfortably though both code uses same pointer arithmetic.
... (4 Replies)
Discussion started by: zius_oram
4 Replies
9. Programming
I am populating an array of string and print it.
But it going in infinite loop and causing segfault.
char Name = {
"yahoo",
"rediff",
"facebook",
NULL
};
main(int argc, char* argv)
{
int j = 0;
... (7 Replies)
Discussion started by: rupeshkp728
7 Replies
10. Shell Programming and Scripting
Hello:
I have some text output, on SunOS 5.11 platform using KSH:
I am trying to parse out each string within the () for each line.
I tried, as example:
perl -lanF"" -e 'print "$F $F $F $F $F $F"'
But for some reason, the output gets all garbled after the the first fields.... (8 Replies)
Discussion started by: gilgamesh
8 Replies
learn(1) General Commands Manual learn(1)
NAME
learn - Provides computer-aided instruction for the C shell
SYNOPSIS
learn [-directory] [subject] [lesson]
The learn command provides computer-aided instruction courses and practice in the use of Tru64 UNIX.
OPTIONS
Allows you to exercise a script in a nonstandard place.
DESCRIPTION
To get started, enter learn; if this is the first time that you are invoking the learn command, you are guided through a series of ques-
tions to determine what type of instruction you want to receive.
If you have used learn before and left your last session without completing a subject, the program uses information in $HOME/.learnrc to
start you up in the same place you left off.
To bypass questions, enter a subject or lesson. In order to enter a lesson, you must know the lesson number that you received in a previ-
ous learn command session. If you do not know the lesson number, enter the lesson number as a subject. The learn command searches for the
first lesson containing the subject you specified. If the lesson is a - (dash), learn prompts for each lesson; this is useful for debug-
ging.
You can specify the following subjects:
files editor vi morefiles macros eqn C
SUBCOMMANDS
There are a few special commands. The bye command terminates a learn session, and the where command tells you of your progress (where m
tells you more.) The again command redisplays the text of the lesson and again lesson lets you review lesson. The hint command prints the
last part of the lesson script used to evaluate a response, while hint m prints the entire lesson script. This is useful for debugging
lessons and might possibly give you an idea about what is expected.
EXAMPLES
To take the online lesson about files, enter: learn files
You are then prompted for further input.
FILES
Playpen directories. Start-up information.
SEE ALSO
Commands: csh(1), ex(1)
learn(1)