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Top Forums Shell Programming and Scripting parsing a string in a shell script Post 54205 by zazzybob on Thursday 5th of August 2004 08:30:22 AM
Old 08-05-2004
Quote:
Excellent. I sincerely thank you for the clear explanation.
No problem Smilie

I also missed a very simple solution too - you can use head and tail with the -c option

e.g. (on Linux)
Code:
echo "welcome" | head -c 4
echo "welcome" | tail -c 5

On HP-UX, you must use head -c -n 4

There's more than one way to do it with *nix!

Cheers
ZB

Last edited by rbatte1; 01-26-2017 at 07:23 AM..
 

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STRUCT 
CFG80211_BEAC(9) Actions and configuration STRUCT CFG80211_BEAC(9) NAME
struct_cfg80211_beacon_data - beacon data SYNOPSIS
struct cfg80211_beacon_data { const u8 * head; const u8 * tail; const u8 * beacon_ies; const u8 * proberesp_ies; const u8 * assocresp_ies; const u8 * probe_resp; size_t head_len; size_t tail_len; size_t beacon_ies_len; size_t proberesp_ies_len; size_t assocresp_ies_len; size_t probe_resp_len; }; MEMBERS
head head portion of beacon (before TIM IE) or NULL if not changed tail tail portion of beacon (after TIM IE) or NULL if not changed beacon_ies extra information element(s) to add into Beacon frames or NULL proberesp_ies extra information element(s) to add into Probe Response frames or NULL assocresp_ies extra information element(s) to add into (Re)Association Response frames or NULL probe_resp probe response template (AP mode only) head_len length of head tail_len length of tail beacon_ies_len length of beacon_ies in octets proberesp_ies_len length of proberesp_ies in octets assocresp_ies_len length of assocresp_ies in octets probe_resp_len length of probe response template (probe_resp) AUTHOR
Johannes Berg <johannes@sipsolutions.net> Author. COPYRIGHT
Kernel Hackers Manual 3.10 June 2014 STRUCT CFG80211_BEAC(9)
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