tcpexec [OPTION] [IPADDR:]PORT COMMAND ...
tcpexec: a minimal, UCSPI inetd
tcpexec attaches the standard input and output of a command to a
TCP socket:
-
exec(3): data is not proxied via an intermediary process
-
SO_REUSEPORT: multiple processes concurrently listen and accept data on the same port
$ tcpexec 9090 cat
$ tcpexec 127.0.0.1:9090 cat
$ tcpexec ::1:9090 env
An echo server allowing 3 concurrent connections:
service/
├── echo1
│ └── run
├── echo2
│ └── run
└── echo3
└── run
- service/echo1/run
#!/bin/sh
exec tcpexec 127.0.0.1:9090 cat
- service/echo2/run
#!/bin/sh
exec tcpexec 127.0.0.1:9090 cat
- service/echo3/run
#!/bin/sh
exec tcpexec 127.0.0.1:9090 cat
Then run:
svscan service
make
#### static executable using musl
./musl-make
-v, --verbose : write additional messages to stderr
-h, --help : usage summary
PROTO : protocol, always set to TCP
TCPREMOTEIP : source IPv4 or IPv6 address
TCPREMOTEPORT : source port
TCPLOCALIP : destination IPv4 or IPv6 address
TCPLOCALPORT : destination port