Hi all,
In a while loop, like below...
while read line
do
read choice
case $choice in
1)
echo "xxx"
esac
done < file
why I can't run the read choice???? (3 Replies)
Hi all
Does anyone have a script that will allow me to stop inside a while read loop.
I want to pause the loop until a enter is pressed.
e.g.
While read line
do
echo something
if LINECOUNT > 40
then
read ENTER?"PRESS ENTER TO CONT..."
... (3 Replies)
hi,
i have an existing ftp script that needs to be translated to SFTP so i have to use expect script to automate the login to the remote server.
Now im facing with a problem becaise i have at least 50 files to be renamed ont he remote server. It's a hassle to hardcode every single command... (1 Reply)
Hi there
I want to ask to a user something about each line of a file. This is my code:
#cat test.txt
first line
second line
third line
#cat test.sh
#!/bin/ksh
read_write () {
echo "Do you want to print the line (YES/NO)?\n"
read TEST
case ${TEST} in
YES) return 0;;
... (3 Replies)
This took me quite awhile to find so I wanted to share this with other people.
To switch windows in vimdiff or
to navigate windows in vimdiff or
to change windows in vimdiff try the following:
The ":vertical" command can be inserted before another command that
splits a window.
... (0 Replies)
Hi,
I am reading file records inside a while loop,
and want to update the record when certain condition is met.
How can I update a file while being read?
I want to avoid using temporary files, copy, rename, ...
while IFS=',' read -r f1 f2
do
function(f1,f2)
if
then
<add... (1 Reply)
Hi,
This query is a part of a much more lengthy script.
I wish to look for all the files in a folder named "data" which in this case has two files i.e. plan.war and agent.properties. For all the files found under data I wish to ask the user as to where they wish copy the files to.
Below,... (14 Replies)
Hi Experts,
Need your guidance for case statement. I tried many way but no success yet.Now my existing code is doing something like below. Each Line of the input file contains one test case.#!/bin/bash
FILE=$1
while read LINE; do
do COMMAND
done < $FILE
Now I want to modify the code... (6 Replies)
Discussion started by: pradyumnajpn10
6 Replies
LEARN ABOUT SUSE
strncpy
STRCPY(3) Linux Programmer's Manual STRCPY(3)NAME
strcpy, strncpy - copy a string
SYNOPSIS
#include <string.h>
char *strcpy(char *dest, const char *src);
char *strncpy(char *dest, const char *src, size_t n);
DESCRIPTION
The strcpy() function copies the string pointed to by src, including the terminating null byte (' '), to the buffer pointed to by dest.
The strings may not overlap, and the destination string dest must be large enough to receive the copy.
The strncpy() function is similar, except that at most n bytes of src are copied. Warning: If there is no null byte among the first n
bytes of src, the string placed in dest will not be null-terminated.
If the length of src is less than n, strncpy() pads the remainder of dest with null bytes.
A simple implementation of strncpy() might be:
char*
strncpy(char *dest, const char *src, size_t n){
size_t i;
for (i = 0 ; i < n && src[i] != ' ' ; i++)
dest[i] = src[i];
for ( ; i < n ; i++)
dest[i] = ' ';
return dest;
}
RETURN VALUE
The strcpy() and strncpy() functions return a pointer to the destination string dest.
CONFORMING TO
SVr4, 4.3BSD, C89, C99.
NOTES
Some programmers consider strncpy() to be inefficient and error prone. If the programmer knows (i.e., includes code to test!) that the
size of dest is greater than the length of src, then strcpy() can be used.
If there is no terminating null byte in the first n characters of src, strncpy() produces an unterminated string in dest. Programmers
often prevent this mistake by forcing termination as follows:
strncpy(buf, str, n);
if (n > 0)
buf[n - 1]= ' ';
BUGS
If the destination string of a strcpy() is not large enough, then anything might happen. Overflowing fixed-length string buffers is a
favorite cracker technique for taking complete control of the machine. Any time a program reads or copies data into a buffer, the program
first needs to check that there's enough space. This may be unnecessary if you can show that overflow is impossible, but be careful: pro-
grams can get changed over time, in ways that may make the impossible possible.
SEE ALSO bcopy(3), memccpy(3), memcpy(3), memmove(3), stpcpy(3), strdup(3), wcscpy(3), wcsncpy(3)COLOPHON
This page is part of release 3.25 of the Linux man-pages project. A description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/man-pages/.
GNU 2009-12-04 STRCPY(3)
09-22-2011
