free5GC Study -01

GitHub - free5gc/free5gc: Open source 5G core network base on 3GPP R15

What is run.sh doing?

1. enter UPF build folder & run program “free5gc-upfd”.
2. run program “nrf”, “amf”, “smf”, “udr”, “pcf”, “udm”, “nssf”, “ausf”.
3. run program “n3iwf”.
4. kill all running processes when get SIGINT .

Something else in run.sh

$! is the PID of the last program your shell ran in the background
$$ means the current PID

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sudo [-E] : Indicates to the security policy that the user wishes to preserve their existing environment variables.

command with ampersand(&) behind means the command running in background.

pgrep is a command used to find process ID with condition.
pgrep [-P] : Only match processes whose parent process ID is listed.

SIGINT is a terminate action called by user (Ctrl+c)
SIGTERM is a terminate signal.

reference

figure : https://www.free5gc.org/roadmap/
free5gc run.sh: https://github.com/free5gc/free5gc/blob/main/run.sh