A quicky demo for 0 to 127 only using OSX 10.14.6, default 'bash' version 3.2.x...
Called as [./]decimal2binary.sh <integer_from_0_to_127> ...
For values -1 to -128 take a look at using binary XOR "relative to zero" for example "-1" becomes binary "11111111"
Last edited by wisecracker; 11-23-2019 at 01:27 PM..
Reason: Added XOR research...
hello everybody!
I want to create a file with permissions for read, write, and execute to everybody using C, so I write this code:
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
int main(){
int fileDescriptor;
fileDescriptor =... (2 Replies)
i have two lines in my rc.local file that are
wget -O/<path>/<file>.zip url://domain.com
unzip -o /<path>/<file>.zip
the wget works fine, but the unzip won't work. when i copy/pase the unzip line to the prompt it works fine. i thought that maybe the unzip was running before the wget... (0 Replies)
Hi,
from the manual
listen(2): listen for connections on socket - Linux man page
It has a parameter called backlog and it limits the maximum length of queue of pending list.
If I set backlog to 128, is it means no more than 128 packets can be handled by server?
If I have three... (3 Replies)
Hello dear users, here I have a script to manipulate .csv files that are like this originally:
And I need to make a script to delete certain fields. Each field is separated with a comma.
So, here is my script (at least a part of it):
Field $1 is composed of a name, and then a... (5 Replies)
Hello,
can someone please help me to fix this script,
I have a 2 files, one file has hostname information and second file has console information of the hosts in each line, I have written a script which actually reads each line in hostname file and should grep in the console file and paste the... (8 Replies)
Hi
I need help with my coding , first time I'm working with bash .
What i must do is check if there is 3 .txt files if there is not 3 of them i must give an error code , if al three is there i must first arrange them in alphabetical order and then take the last word in al 3 of the .txt files... (1 Reply)
Hi,
I have the following requirement.
There will be following text/line in a file (eg: search-build.txt)
PRODUCT_VERSION="V:01.002.007.Build1234"
I need to update the incremental build number (eg here 007) every time I give a build through script. I am able to search the string and get... (4 Replies)
Hello,
I am not sure, where I am missing in the scirpt, I am trying to grep few users from /etc/passwd file and if exists, I added line to echo as user exist, if not create it.
#!/bin/bash
for vid in v707 z307 z496 z163 z292 ; do
if
then
echo " $vid User exists "
else
... (2 Replies)
Hi
I am setting the variables like this :
setenv MODULE1 modem5__3
setenv MODULE2 modem5__2
setenv MODULE3 modem_ctrl_1_1
setenv MODULE4 modem_1_0
setenv COUNT 10
I am having a bash script as shown below
################################################
#!/bin/bash
for ((... (5 Replies)
Hi
I keep getting the following error
sed: -e expression #1, char 32: unterminated `s' command
sed: -e expression #1, char 35: unterminated `s' command
sed: -e expression #1, char 35: unterminated `s' command
whenever I use the following bash script
#! /bin/bash... (2 Replies)
Discussion started by: spbr
2 Replies
LEARN ABOUT LINUX
tempfile
TEMPFILE(1) General Commands Manual TEMPFILE(1)NAME
tempfile - create a temporary file in a safe manner
SYNOPSIS
tempfile [-d DIR] [-p STRING] [-s STRING] [-m MODE] [-n FILE] [--directory=DIR] [--prefix=STRING] [--suffix=STRING] [--mode=MODE]
[--name=FILE] [--help] [--version]
DESCRIPTION
tempfile creates a temporary file in a safe manner. It uses tempnam(3) to choose the name and opens it with O_RDWR | O_CREAT | O_EXCL.
The filename is printed on standard output. See tempnam(3) for the actual steps involved in directory selection.
The directory in which to create the file might be searched for in this order (but refer to tempnam(3) for authoritative answers):
a) In case the environment variable TMPDIR exists and contains the name of an appropriate directory, that is used.
b) Otherwise, if the --directory argument is specified and appropriate, it is used.
c) Otherwise, P_tmpdir (as defined in <stdio.h>) is used when appropriate.
d) Finally an implementation-defined directory (/tmp) may be used.
OPTIONS -d, --directory DIR
Place the file in DIR.
-m, --mode MODE
Open the file with MODE instead of 0600.
-n, --name FILE
Use FILE for the name instead of tempnam(3). The options -d, -p, and -s are ignored if this option is given.
-p, --prefix STRING
Use up to five letters of STRING to generate the name.
-s, --suffix STRING
Generate the file with STRING as the suffix.
--help Print a usage message on standard output and exit successfully.
--version
Print version information on standard output and exit successfully.
RETURN VALUES
An exit status of 0 means the temporary file was created successfully. Any other exit status indicates an error.
BUGS
Exclusive creation is not guaranteed when creating files on NFS partitions. tempfile is deprecated; you should use mktemp(1) instead.
EXAMPLE
#!/bin/sh
#[...]
t=$(tempfile) || exit
trap "rm -f -- '$t'" EXIT
#[...]
rm -f -- "$t"
trap - EXIT
exit
SEE ALSO tempnam(3), mktemp(1)Debian 30 May 2011 TEMPFILE(1)