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Top Forums UNIX for Beginners Questions & Answers How to check if a file is open in editor? Post 303005366 by Corona688 on Tuesday 17th of October 2017 12:31:29 PM
Old 10-17-2017
If you run the program in foreground instead of background, your program can simply wait for it instead of polling.

If you run it in background, you can save its PID with PID="$!" and poll for that specific PID.
 

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HOSTAPD(8)							      hostapd								HOSTAPD(8)

NAME
hostapd - IEEE 802.11 AP, IEEE 802.1X/WPA/WPA2/EAP/RADIUS Authenticator SYNOPSIS
hostapd [-hdBKtv] [-P <PID file>] <configuration file(s)> DESCRIPTION
This manual page documents briefly the hostapd daemon. hostapd is a user space daemon for access point and authentication servers. It implements IEEE 802.11 access point management, IEEE 802.1X/WPA/WPA2/EAP Authenticators and RADIUS authentication server. The current version supports Linux (Host AP, madwifi, mac80211-based drivers) and FreeBSD (net80211). hostapd is designed to be a "daemon" program that runs in the background and acts as the backend component controlling authentication. hostapd supports separate frontend programs and an example text-based frontend, hostapd_cli, is included with hostapd. OPTIONS
A summary of options is included below. For a complete description, run hostapd from the command line. -h Show usage. -d Show more debug messages. -dd Show even more debug messages. -B Run daemon in the background. -P <PID file> Path to PID file. -K Include key data in debug messages. -t Include timestamps in some debug messages. -v Show hostapd version. SEE ALSO
hostapd_cli(1). AUTHOR
hostapd was written by Jouni Malinen <j@w1.fi>. This manual page was written by Faidon Liambotis <faidon@cube.gr>, for the Debian project (but may be used by others). hostapd April 7, 2005 HOSTAPD(8)
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