So if I want to alter codeMaker (located in main()) with the function read_unbuffered I should not use a pointer?
Here's an excerpt from my main:
And, just to refresh, here is the function:
As you can see, I've changed the name of read_unbuffered() to getcode(). Also in getcode() I changed the array from password[] to codeMaker[] in attempt to make this work.
So, since the codeMaker[] in getcode() is local to getcode(), it is not affecting the codeMaker[] in main(), right? Which means, when I check for validity in main() it is checking a different codeMaker[] that it needs to be checking.
Is it possible for a internal LAN to mask a IP e.g. i have a server ip running the intranet ip being 192.168.0.8 and i want to make that like www.intranet.com is this possible on a internal network ? (1 Reply)
Hello,
I need to know that whether a content of a string can be hidden or masked inside a shell script.
My Sample Code is given below
<Code>
#!/usr/bin/ksh
Userid=test
DB=temp
Passwd=`java Decryption test`
# The Above command will get the encryped password for "test" user id and store... (2 Replies)
I have a pipe delimited file that I need to 'mask' to before loading to keep some data confidential. I need to maintain the first 4 bytes of certain columns and replace the remaining bytes with an 'x'. I would like to maintain spaces but it's not a requirement.
Example, need to mask columns 2... (2 Replies)
Hi,
I currently have a UNIX script with a function that uses a username and password to connect to the database, retrieve some information and then exit.
At the moment, am getting the username and password from a hidden plain text file and permission set to -r--------, i.e. read only to who... (1 Reply)
Hi I am facing an issue with the below script which has the below line
each field being separated with a tab.
I need to mask the 8 and 7th field based on following conditions
1. 8th field is 16 in length and is numerics
i will mask the middle 6 digits except the first 6 and last 4.
input... (2 Replies)
Is there a way to mask the password inside of a script to minimize the impact of a comprimised server? So
ssh -o "PasswordAuthentication no" -o "HostbasedAuthentication yes" -l testuser 192.168.3.1 "mysqldump --opt --all-databases -u root -pPassword| gzip" > $backup_dir/mysqldump.gz
a... (2 Replies)
I have a requirement of masking few specific fields in the UNIX file. The details are as following-
File is fixed length file with each record of 250 charater length.
2 fields needs to be masked – the positions are 21:30 and 110:120
The character by character making needs to be done which... (5 Replies)
My file "test.dat" data as below
Requirement is to mask(replace) all english characters with "X" EXCEPT first 7 characters of every line.
my command
awk '{gsub("]","X")}1' test.dat
looks not working properly, Appreciate any suggestion... (6 Replies)
Discussion started by: JSKOBS
6 Replies
LEARN ABOUT REDHAT
setvbuf
SETBUF(3) Linux Programmer's Manual SETBUF(3)NAME
setbuf, setbuffer, setlinebuf, setvbuf - stream buffering operations
SYNOPSIS
#include <stdio.h>
void setbuf(FILE *stream, char *buf);
void setbuffer(FILE *stream, char *buf, size_tsize);
void setlinebuf(FILE *stream);
int setvbuf(FILE *stream, char *buf, int mode , size_t size);
DESCRIPTION
The three types of buffering available are unbuffered, block buffered, and line buffered. When an output stream is unbuffered, information
appears on the destination file or terminal as soon as written; when it is block buffered many characters are saved up and written as a
block; when it is line buffered characters are saved up until a newline is output or input is read from any stream attached to a terminal
device (typically stdin). The function fflush(3) may be used to force the block out early. (See fclose(3).) Normally all files are block
buffered. When the first I/O operation occurs on a file, malloc(3) is called, and a buffer is obtained. If a stream refers to a terminal
(as stdout normally does) it is line buffered. The standard error stream stderr is always unbuffered by default.
The setvbuf function may be used on any open stream to change its buffer. The mode parameter must be one of the following three macros:
_IONBF unbuffered
_IOLBF line buffered
_IOFBF fully buffered
Except for unbuffered files, the buf argument should point to a buffer at least size bytes long; this buffer will be used instead of the
current buffer. If the argument buf is NULL, only the mode is affected; a new buffer will be allocated on the next read or write opera-
tion. The setvbuf function may only be used after opening a stream and before any other operations have been performed on it.
The other three calls are, in effect, simply aliases for calls to setvbuf. The setbuf function is exactly equivalent to the call
setvbuf(stream, buf, buf ? _IOFBF : _IONBF, BUFSIZ);
The setbuffer function is the same, except that the size of the buffer is up to the caller, rather than being determined by the default
BUFSIZ. The setlinebuf function is exactly equivalent to the call:
setvbuf(stream, (char *)NULL, _IOLBF, 0);
RETURN VALUE
The function setvbuf returns 0 on success. It can return any value on failure, but returns nonzero when mode is invalid or the request
cannot be honoured. It may set errno on failure. The other functions are void.
CONFORMING TO
The setbuf and setvbuf functions conform to ANSI X3.159-1989 (``ANSI C'').
BUGS
The setbuffer and setlinebuf functions are not portable to versions of BSD before 4.2BSD, and are available under Linux since libc 4.5.21.
On 4.2BSD and 4.3BSD systems, setbuf always uses a suboptimal buffer size and should be avoided.
You must make sure that both buf and the space it points to still exist by the time stream is closed, which also happens at program termi-
nation.
For example, the following is illegal:
#include <stdio.h>
int main()
{
char buf[BUFSIZ];
setbuf(stdin, buf);
printf("Hello, world!
");
return 0;
}
SEE ALSO fclose(3), fflush(3), fopen(3), fread(3), malloc(3), printf(3), puts(3)Linux 2001-06-09 SETBUF(3)