It's best not to use printf that way, since character sequences that are special to printf (format specifiers, escape sequences) will be misinterpreted and lead to mangled output. To print the value of a variable, it's best to use:
Example of how things would go wrong:
Using the printf(1) utility, this is nothing but a minor bug. Using the printf(3) function in the C standard library, this would be a HUGE security hole.
Here is the code I'm using
{
printf("%11d %4.2f\% %4.2f\%\n", $1,$2,$3);
}
I want the output to look something like
1235415234 12.24% 52.46%
Instead it looks something like
319203842 42.27\%4.2f\%
How do I just print a "%" without awk or printf thinking I'm trying to do... (1 Reply)
I am trying to use printf with a character string that is used within a do loop. The problem is that while in the loop, the printf prints the variable name instead of the value. The do loop calls the variable name from a text file (called device.txt):
while read device
do
cat $device.clean... (2 Replies)
Hi I'm having a problem with converting a file:
ID X
1 7
1 8
1 3
2 5
2 7
2 2
To something like this:
ID X1 X2 X3
1 7 8 3
2 5 7 2
I've tried the following loop:
for i in `cat tst.csv| awk -F "," '{print $1}'| uniq`;do grep -h $i... (4 Replies)
Hi Friends,
I am trying to insert lines of the below format in a file:
# x3a4914 Joe 2010/04/07
# seh Lane 2010/04/07
# IN01379 Larry 2010/04/07
I am formatting the strings as follows using awk printf:
awk 'printf "# %s %9s %18s\n", $2,$3,$4}'
... (2 Replies)
hallow all i need your advice about this script
i have script like this:
INDEX=/zpool1/NFS/INDEX/${1}
SCRIPT=/zpool1/NFS/script/${1}
LIST=SAMPLE
cd ${SCRIPT}
for i in `cat ${LIST}`
do
GETDATE=`echo ${i}|awk '{print substr($1,9,8)}'`
/usr/xpg4/bin/awk -F ":" '{close(f);f=$4}{print >>... (4 Replies)
Hi,
Struggling with single quotes, double quotes, etc.
I want to print a header line, followed by lines with actual values, based on a print option.
In real life it is going to be something like 15 print options and 50 values.
Output will be 1 header and several value lines.
In this example... (5 Replies)
Is possible to print padded string in printf?
Example
echo 1 | awk '{printf("%03d\n", $1)}'
001I want
S1
S11
S2
S21to be padded as:
S01
S11
S02
S21Thanks! (26 Replies)
Discussion started by: yifangt
26 Replies
LEARN ABOUT DEBIAN
explain_printf_or_die
explain_printf_or_die(3) Library Functions Manual explain_printf_or_die(3)NAME
explain_printf_or_die - formatted output conversion and report errors
SYNOPSIS
#include <libexplain/printf.h>
int explain_printf_or_die(const char *format);
int explain_printf_on_error(const char *format);
DESCRIPTION
The explain_printf_or_die function is used to call the printf(3) system call. On failure an explanation will be printed to stderr, obtained
from the explain_printf(3) function, and then the process terminates by calling exit(EXIT_FAILURE).
The explain_printf_on_error function is used to call the printf(3) system call. On failure an explanation will be printed to stderr,
obtained from the explain_printf(3) function, but still returns to the caller.
format The format, exactly as to be passed to the printf(3) system call.
RETURN VALUE
The explain_printf_or_die function only returns on success, see printf(3) for more information. On failure, prints an explanation and
exits, it does not return.
The explain_printf_on_error function always returns the value return by the wrapped printf(3) system call.
EXAMPLE
The explain_printf_or_die function is intended to be used in a fashion similar to the following example:
int result = explain_printf_or_die(format);
SEE ALSO printf(3)
formatted output conversion
explain_printf(3)
explain printf(3) errors
exit(2) terminate the calling process
COPYRIGHT
libexplain version 0.52
Copyright (C) 2010 Peter Miller
explain_printf_or_die(3)