thx for the help guys ! although i have one more similar question.
i want to know if the path leading to a file given by the user is valid, in other words if the file exists,so how exactly is the " if " structure for this ?
Hi,
i want to read a text file whose content(single line) will be a number like 1 or 2 or 3 ..... what i want to do is to read the file and increment the content of the file, using unix scripting.
Regards,
Senthil Kumar Siddhan. (2 Replies)
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)
Hi,
i'd like to implmeent emergency shutdown script in case our AC dies and the temperature rises too high.
I can get core temperatures with:
sensors | grep Core | cut -c15-16
Result is:
23
18
18
13
21
18
15
17
How can I check if any of the cores is above eg. 80 (that's C of... (2 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)
hi
I want to write a function which takes int as input and returns a string like this.
char GetString(int iNo)
{
switch(iNo)
{
case 0:
return "Zero";
break;
case 1:
return "One";
break;
}
}
void main()
{
int i;
printf("Enter... (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)
Hi,
I have column 5 in a file which contains string like this for ex.
RP11-125O5.2
SLCO1B1
CAPN1
FRMPD2
TXNL4B
So I do by
data = )]
ValueError: invalid literal for int() with base 10: 'R'
Can someday tell me how to convert this column into int successfully.
Thank You in... (7 Replies)
Discussion started by: rossi
7 Replies
LEARN ABOUT FREEBSD
escape
escape(1) Mail Avenger 0.8.3 escape(1)NAME
escape - escape shell special characters in a string
SYNOPSIS
escape string
DESCRIPTION
escape prepends a "" character to all shell special characters in string, making it safe to compose a shell command with the result.
EXAMPLES
The following is a contrived example showing how one can unintentionally end up executing the contents of a string:
$ var='; echo gotcha!'
$ eval echo hi $var
hi
gotcha!
$
Using escape, one can avoid executing the contents of $var:
$ eval echo hi `escape "$var"`
hi ; echo gotcha!
$
A less contrived example is passing arguments to Mail Avenger bodytest commands containing possibly unsafe environment variables. For
example, you might write a hypothetical reject_bcc script to reject mail not explicitly addressed to the recipient:
#!/bin/sh
formail -x to -x cc -x resent-to -x resent-cc
| fgrep "$1" > /dev/null
&& exit 0
echo "<$1>.. address does not accept blind carbon copies"
exit 100
To invoke this script, passing it the recipient address as an argument, you would need to put the following in your Mail Avenger rcpt
script:
bodytest reject_bcc `escape "$RECIPIENT"`
SEE ALSO avenger(1),
The Mail Avenger home page: <http://www.mailavenger.org/>.
BUGS
escape is designed for the Bourne shell, which is what Mail Avenger scripts use. escape might or might not work with other shells.
AUTHOR
David Mazieres
Mail Avenger 0.8.3 2012-04-05 escape(1)