03-21-2012
hello is 5 characters long. Not 20.
strcmp, strncmp and other similar functions are used to do string compares. A C string is terminated with a nul (ascii 0) character. This allows strcmp to determine the string's length and stop comparing. memcmp compares objects in memory. It does not check the length because it is meant to compare memory objects which often have ascii 0 characters.
You provide the length to memcmp. 20 is not the length of the word hello
8 More Discussions You Might Find Interesting
1. Programming
Guys there is another bug that has developed.........now messaged above 6 bytes are trimmed and echoed back to client.After the first message the echo is not regular.I have put a loop in both client and server to check for closing.Moreover for connection close i also need to put another clause that... (3 Replies)
Discussion started by: arjunjag
3 Replies
2. Post Here to Contact Site Administrators and Moderators
When searching for new posts, I see that my voting in one of the polls counts as a 'new post'. However, while the '<blah> minutes ago' entry updates correctly, the 'by <username>' is the last user to actually post a comment in the poll instead.
Result:
Poll: vB Guest Book 39... (4 Replies)
Discussion started by: Smiling Dragon
4 Replies
3. Shell Programming and Scripting
Hi All,
I am using Red Hat Linux on my servers. The problem that I am facing is, sometimes the /opt usage on the server shows used percentage as 100% , when actually it is simply 20%.
When I reboot the system, it comes back to 20%.Is this a bug in the system or my settings have gone wrong... (1 Reply)
Discussion started by: nua7
1 Replies
4. AIX
xxxxserver# lsattr -El inet0 | grep 255.240.0.0,32.224.0.0,32.78.120.254 | grep '.40'
route net,-hopcount,1,-netmask,255.240.0.0,32.224.0.0,32.78.120.254
How this is possible? (1 Reply)
Discussion started by: itik
1 Replies
5. UNIX for Dummies Questions & Answers
#!/bin/bash
if then
#echo "infinite loop"
exit 0
fi
when I run this file I get the following error:
./test_infinite_loop: line 5: syntax error near unexpected token `fi'
./test_infinite_loop: line 5: `fi'
:confused: (4 Replies)
Discussion started by: jon80
4 Replies
6. Programming
Hello,
Im using the g++(g++ Ubuntu/Linaro 4.4.4-14ubuntu5 4.4.5) and im trying to compile a small snippet code and got into an endless loop.I recompiled that in VS2010 under Windows 7 and the answer is as expected.so i wonder is this a bug of g++?here is my code.
#include<iostream>
using... (5 Replies)
Discussion started by: homeboy
5 Replies
7. Shell Programming and Scripting
Hi gurus,
I have script as below:
#!/bin/ksh
while :
do
cat /dev/null > srcfile
exit_time=`TZ=GMT-20 date +%Y%m%d1950`
cur_time=`date +%Y%m%d%H%M`
flag=1
if ; then
... (7 Replies)
Discussion started by: ken6503
7 Replies
8. UNIX for Advanced & Expert Users
This is for the big guns...
I have been modifying AudioScope.sh to bring it inline with more current practices.
I hit a bug which IS not present in the original code but was after modification.
Shell check first:-
#!/bin/sh
txt="1234567890"
echo "$(( $txt ))"
echo "$(( ${#txt} - 1 ))"
echo... (17 Replies)
Discussion started by: wisecracker
17 Replies
LEARN ABOUT DEBIAN
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)