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Full Discussion: [awk] rounding a float number?
Top Forums Shell Programming and Scripting [awk] rounding a float number? Post 302939436 by sea on Wednesday 25th of March 2015 01:19:43 PM
Old 03-25-2015
[awk] rounding a float number?
Heyas

Trying to calculate the total size of a file by reading its bitrate.

Code snippet:
Code:
fs_expected() { #
	# Returns the expected filesize in bytes
	#
		pr_str() {
			ff=$(cat $TMP.info)
			d="${ff#*bitrate: }"
			echo "${d%%,*}" | $AWK '{print $1}' | head -n 1
		}
		t_BYTERATE=$(( $(pr_str) * 1024 / 8 ))
		t_TIMES=$( PlayTime | $SED s,":"," ",g)
		
		echo "$t_BYTERATE $t_TIMES"
		
		echo "$t_TIMES" | $AWK '{ (((24*$1*60)+(60*$2)+$3)*BYTES) }' BYTES=$t_BYTERATE
		return $?
	}

Output:
Code:
86272 00 44 14.96

Sadly there is no longer any output at all when i remove the bold code line.

Expected output:
When i remove the bold code line, which is just there for debuging, i want to get the proper expected filesize.
As of now, i assume awk fails due to the underlined floating point number?

Playtime does the same as pr_str, just for the duration of the file.
$TMP.info is filled by another prior function.

Any ideas?
Thank you in advance
Last edited by sea; 03-25-2015 at 02:27 PM..
 

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LEARN ABOUT CENTOS

enum_ieee80211_rate_flags

ENUM 
IEEE80211_RATE_(9) 					Device registration					   ENUM IEEE80211_RATE_(9)

NAME

       enum_ieee80211_rate_flags - rate flags

SYNOPSIS

       enum ieee80211_rate_flags {
	 IEEE80211_RATE_SHORT_PREAMBLE,
	 IEEE80211_RATE_MANDATORY_A,
	 IEEE80211_RATE_MANDATORY_B,
	 IEEE80211_RATE_MANDATORY_G,
	 IEEE80211_RATE_ERP_G
       };

CONSTANTS

       IEEE80211_RATE_SHORT_PREAMBLE
	   Hardware can send with short preamble on this bitrate; only relevant in 2.4GHz band and with CCK rates.

       IEEE80211_RATE_MANDATORY_A
	   This bitrate is a mandatory rate when used with 802.11a (on the 5 GHz band); filled by the core code when registering the wiphy.

       IEEE80211_RATE_MANDATORY_B
	   This bitrate is a mandatory rate when used with 802.11b (on the 2.4 GHz band); filled by the core code when registering the wiphy.

       IEEE80211_RATE_MANDATORY_G
	   This bitrate is a mandatory rate when used with 802.11g (on the 2.4 GHz band); filled by the core code when registering the wiphy.

       IEEE80211_RATE_ERP_G
	   This is an ERP rate in 802.11g mode.

DESCRIPTION

       Hardware/specification flags for rates. These are structured in a way that allows using the same bitrate structure for different bands/PHY
       modes.

AUTHOR

       Johannes Berg <johannes@sipsolutions.net>
	   Author.

COPYRIGHT

Kernel Hackers Manual 3.10					     June 2014						   ENUM IEEE80211_RATE_(9)
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