VBIN_PRINTF(9) Basic C Library Functions VBIN_PRINTF(9)NAME
vbin_printf - Parse a format string and place args' binary value in a buffer
SYNOPSIS
int vbin_printf(u32 * bin_buf, size_t size, const char * fmt, va_list args);
ARGUMENTS
bin_buf
The buffer to place args' binary value
size
The size of the buffer(by words(32bits), not characters)
fmt
The format string to use
args
Arguments for the format string
DESCRIPTION
The format follows C99 vsnprintf, except n is ignored, and its argument is skiped.
The return value is the number of words(32bits) which would be generated for the given input.
NOTE
If the return value is greater than size, the resulting bin_buf is NOT valid for bstr_printf.
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 VBIN_PRINTF(9)
Check Out this Related Man Page
vprintf(3) Library Functions Manual vprintf(3)NAME
vprintf, vfprintf, vsnprintf, vsprintf - Format a variable number of parameters for output
LIBRARY
Standard C Library (libc.so, libc.a)
SYNOPSIS
#include <stdarg.h> #include <stdio.h>
int vprintf(
const char *format,
va_list printarg);
int vfprintf(
FILE *stream,
const char *format,
va_list printarg);
int vsnprintf(
char *string, size_t n,
const char *format,
va_list printarg);
int vsprintf(
char *string,
const char *format,
va_list printarg);
STANDARDS
Interfaces documented on this reference page conform to industry standards as follows:
vfprintf(), vprintf(), vsnprintf(), vsprintf(): ISO C, XPG4, XPG4-UNIX
Refer to the standards(5) reference page for more information about industry standards and associated tags.
PARAMETERS
Specifies a character string that contains two types of objects: Plain characters, which are copied to the output stream. Conversion spec-
ifications, each of which causes zero or more items to be fetched from the stdarg parameter lists. Specifies the arguments to be printed.
Specifies the output stream. Specifies the buffer to which output is printed. Specifies the size of the buffer referred to by string.
DESCRIPTION
The vprintf(), vfprintf(), vsnprintf(), and vsprintf() functions format and write stdarg parameter lists.
These functions are the same as the printf(), fprintf(), snprintf(), and sprintf() functions, respectively, except that these functions are
not called with a variable number of parameters. Instead, vprintf(), vfprintf(), vsnprintf(), and vsprintf() are called with a parameter
list pointer as defined by stdarg. Because these functions invoke the va_arg() macro and not the va_end() macro, the value of printarg is
indeterminate after a return. Therefore, applications should execute a call to the va_end() macro after a call to one of these functions.
EXAMPLES
The following example demonstrates how the vfprintf() function can be used to write an error routine:
#include <stdarg.h> #include <stdio.h>
void error(char *funct, char *fmt, ...) {
va_list args;
/*
** Display the name of the function that called error
*/
fprintf(stderr, "ERROR in %s: ", funct);
/*
** Display the remainder of the message
*/
va_start(args, fmt);
vfprintf(stderr, fmt, args);
va_end(args);
abort(); }
RELATED INFORMATION
Functions: fopen(3), printf(3), vwprintf(3), wprintf(3) delim off
vprintf(3)
Hi everyone,
I know the following questions are noobish questions but I am asking them because I am confused about the basics of history behind UNIX and LINUX.
Ok onto business, my questions are-:
Was/Is UNIX ever an open source operating system ?
If UNIX was... (21 Replies)
Hello and thanks in advance for any help anyone can offer me
I'm trying to learn the find command and thought I was understanding it... Apparently I was wrong. I was doing compound searches and I started getting weird results with the -size test. I was trying to do a search on a 1G file owned by... (14 Replies)
hi all,
i have installed quota on my centos 7 machine and its what im after (setting size limit on users, so they cant fill the hard drive)
i want to now make this part of my create user script for my sftp server so i want to do a echo and a read command so i capture the limit they enter... (0 Replies)
Hi everybody,
Which Unix base OS have best performance for HOST virtualization?
I tested SmartOS but it needs another OS to connect remotely!
Thanks in advance. (11 Replies)
Hi All,
I need to write a shell script which opens a file and increments the version(text) within the file every time the script runs. For example:
$ cat docker_file.yml
version: '3.1'
services:
ui:
image: repo-srv.dev.io:5000/facebook/ui:0.0.2-QA1
$
So, I would like... (6 Replies)
Dear Team
We use DB2 v10.5 and using DBArtisan tool
Can someone please guide how to convert digits to binary numbers using db2 feature.
Ex> for number 9 , binary should be 1001 ( 8+1)
Any help appreciated. Thanks (2 Replies)
hi folks,
how to using tar with exclude directory and compress it using tar.Z
i only know how to exclude dir only with this command below:
tar -cvf /varios/restore/test.tar -X excludefile.txt /jfma/test1/
how to compress it using 1 command?
Thanx
Please use CODE tags as... (6 Replies)
Quite an obscure question I think.
We have a rebuild process for remote sites that allows us to PXE rebuild a till (actually a PC with a touch screen and various fancy bits) running CentOS. The current CentOS5 tills work just fine with a tar image restore and some personalisation. Sadly,... (4 Replies)
Hello All,
I had recently learnt a bit of Docker(which provides containerization process).
Here are some of my learning points from it.
Let us start first with very basic question:
What is Docker:
Docker is a platform for sysadmins and developers to DEPLOY, DEVELOP and RUN applications ... (7 Replies)
What is the point of this? Whenever I close my shell it appends to the history file without adding this. I have never seen it overwrite my history file.
# When the shell exits, append to the history file instead of overwriting it
shopt -s histappend (3 Replies)
Hello... And thanks in advance for any help anyone can offer me
I was trying to work out the differences between displaying modify, access, and change times with the 'ls' command. Everything seems in order when I look at files, but the access time on a directory doesn't seem to change when I... (4 Replies)
Hello everyone,
I am having an issue here with CentOS release 6.6 (Final) that shows all of the space used up, but I can't tell where the space went.
Seemingly I am using up 100%, according to
df -h
Filesystem Size Used Avail Use% Mounted on... (27 Replies)
I'm trying to use a bash script for a psych experiment that involves listening to sound files and responding. If I have something like the code below, how can I make sure that a key press is assigned to RESPONSE only after the second echo statement?
for i in 1 2 3; do
echo "Ready?"
sleep 2
... (10 Replies)
After the success of the jq - tool for parsing and manipulating JSON-Data someone wrote a tool called yq, which aims to be the same for YAML, what jq is for JSON. Seems to work fine. I'll definitely give it a chance in future.
Example YAML-File:
--- !ruby/object:Puppet::Node::Facts
... (1 Reply)
Dear All,
I am very pleased to announce that Dave Munro (gull04) is joining the Moderation Team, after being a very valuable member of UNIX.com for 15+ years.
Dave is an IT Consultant with 30 years of experience this year, has worked in many of the industry vertical market segments and has... (6 Replies)