i was going through the script debugging technique. below example was given in the book.
my problem is when author debug the script with -nv option he is getting below o/p
however when i debug the same script with same option i am getting below o/p
in my case i just change the name of the script.(i use debug6 and author used buggy2.sh rest i simply copy paste the script.)
why here i am getting bit more info in compare to author's o/p. is there is some problem or it is ok.
to correct the script author suggested to put (; ; after Failed in line no. 20 like below.
my question is why i need to use 2 colon after Failed not one?
also how does author know just by seeing one single line(means by seeing o/p of debug) that he need to put 2 colon after Failed.
Hi,
Can anyone please let me know the meaning of this line,i am not able to understand the egrep part(egrep '^{1,2}).This will search for this combination in beginning but what does the values in {}signifies here.
/bin/echo $WhenToRun | egrep '^{1,2}:$' >/dev/null (1 Reply)
OS : SOLARIS 10
debug tool :$gdb -v
GNU gdb 6.6
compiler : $gcc -v
gcc version 2.95.3 20010315 (release)
When i tried to debug my application i got the following error.
$gdb Pal
GNU gdb 6.6
Copyright (C) 2006 Free Software Foundation, Inc.
This GDB was... (2 Replies)
If I don't explain my issue well enough, I apologize ahead of time, extreme newbie here to scripting.
I'm currently learning scripting from books and have moved on to the text Wicked Cool Shell Scripts by Dave Taylor, but there are still basic concepts that I'm having trouble understanding.
... (10 Replies)
i am beginner in shell scripting.
not able to understand what below line will do.
PS1=${HOST:=Žuname -nŽ}"$ " ; export PS1 HOST
below is the script
#!/bin/hash
PS1=${HOST:=Žuname -nŽ}"$ " ; export PS1 HOST ;
echo $PS1
and i getting the below output
Žuname -nŽ$ (25 Replies)
I have added some code in my file.
I have created executable rpm file of our code and also I have created debuginfo and debugsource files and installed all three.
But when I debug in gdb I see the the code changes in soucre file. But the break point does not hit at that place as if it did not... (1 Reply)
the attached perl script is a deamon that, once kicked off from the command line, it runs in the background and waits for the master server to tell it what plugins to run.
the script works well. but the problem is, whenever i start it, after about a few seconds of starting it, i start getting... (4 Replies)
Hi ,
could someone suggest best reference for core file understanding , analysis , debugging for different architectures
like what registers represent what in a architecture specific core ..
how to get maximum information out of corrupted core
different tools and how they work and how to... (1 Reply)
I have this code
#!/bin/bash
LZ () {
RETVAL="\n$(date +%Y-%m-%d_%H-%M-%S) --- "
return RETVAL
}
echo -e $LZ"Test"
sleep 3
echo -e $LZ"Test"
which I want to use to make logentrys on my NAS. I expect of this code that there would be output like
2017-03-07_11-00-00 --- Test (4 Replies)
Discussion started by: matrois
4 Replies
LEARN ABOUT MINIX
ppmtosixel
ppmtosixel(1) General Commands Manual ppmtosixel(1)NAME
ppmtosixel - convert a portable pixmap into DEC sixel format
SYNOPSIS
ppmtosixel [-raw] [-margin] [ppmfile]
DESCRIPTION
Reads a portable pixmap as input. Produces sixel commands (SIX) as output. The output is formatted for color printing, e.g. for a DEC
LJ250 color inkjet printer.
If RGB values from the PPM file do not have maxval=100, the RGB values are rescaled. A printer control header and a color assignment table
begin the SIX file. Image data is written in a compressed format by default. A printer control footer ends the image file.
OPTIONS -raw If specified, each pixel will be explicitly described in the image file. If -raw is not specified, output will default to com-
pressed format in which identical adjacent pixels are replaced by "repeat pixel" commands. A raw file is often an order of magni-
tude larger than a compressed file and prints much slower.
-margin
If -margin is not specified, the image will be start at the left margin (of the window, paper, or whatever). If -margin is speci-
fied, a 1.5 inch left margin will offset the image.
PRINTING
Generally, sixel files must reach the printer unfiltered. Use the lpr -x option or cat filename > /dev/tty0?.
BUGS
Upon rescaling, truncation of the least significant bits of RGB values may result in poor color conversion. If the original PPM maxval was
greater than 100, rescaling also reduces the image depth. While the actual RGB values from the ppm file are more or less retained, the
color palette of the LJ250 may not match the colors on your screen. This seems to be a printer limitation.
SEE ALSO ppm(5)AUTHOR
Copyright (C) 1991 by Rick Vinci.
26 April 1991 ppmtosixel(1)