I have a command line manager tool that builds the starting environment for
a process and calls cmd.Start().
The code sets (doesn't need to as it starts as nil, but does to be extra
explicit) cmd.ExtraFiles = nil, but even then I seem to inherit a bunch of
FDs from the CLI - I noticed because the oddities belong to VSCode terminal
(cmd dump first, just before to call to cmd.Start()):
2024-11-08T10:08:09Z DEBUG: pkg/host/local.go:221 host.(*Local).Start() >
cordial: cmd:
&exec.Cmd{Path:"/home/peter/geneos/packages/gateway/active_prod/gateway2.linux_64",
Args:[]string{"/home/peter/geneos/packages/gateway/active_prod/gateway2.linux_64",
"Demo Gateway", "-gateway-name", "Demo Gateway", "-resources-dir",
"/home/peter/geneos/packages/gateway/active_prod/resources", "-log",
"/home/peter/geneos/gateway/gateways/Demo Gateway/gateway.log", "-setup",
"/home/peter/geneos/gateway/gateways/Demo Gateway/gateway.setup.xml",
"-licd-host", "localhost", "-ssl-certificate",
"/home/peter/geneos/gateway/gateways/Demo Gateway/gateway.pem",
"-ssl-certificate-key", "/home/peter/geneos/gateway/gateways/Demo
Gateway/gateway.key", "-ssl-certificate-chain",
"/home/peter/geneos/gateway/gateways/Demo Gateway/chain.pem",
"-licd-secure", "-key-file",
"/home/peter/geneos/gateway/gateway_shared/keyfiles/06761949.aes",
"-previous-key-file",
"/home/peter/geneos/gateway/gateway_shared/keyfiles/740424C5.aes"},
Env:[]string{"TEST2=memory", "TEST=mytest2",
"LD_LIBRARY_PATH=/home/peter/geneos/packages/gateway/active_prod/lib64:/usr/lib64"},
Dir:"/home/peter/geneos/gateway/gateways/Demo Gateway",
Stdin:io.Reader(nil), Stdout:(*os.File)(0xc000166288),
Stderr:(*os.File)(0xc000166288), ExtraFiles:[]*os.File(nil),
SysProcAttr:(*syscall.SysProcAttr)(0xc000000840),
Process:(*os.Process)(nil), ProcessState:(*os.ProcessState)(nil),
ctx:context.Context(nil), Err:error(nil), Cancel:(func() error)(nil),
WaitDelay:0, childIOFiles:[]io.Closer(nil), parentIOPipes:[]io.Closer(nil),
goroutine:[]func() error(nil), goroutineErr:(<-chan error)(nil),
ctxResult:(<-chan exec.ctxResult)(nil), createdByStack:[]uint8(nil),
lookPathErr:error(nil), cachedLookExtensions:struct { in string; out string
}{in:"", out:""}}
gateway "Demo Gateway" started with PID 55903
FDs 19 and above seem to be inherited:
peter@thinkpad:~/cordial/tools/geneos$ lsof -p 55903
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
gateway2. 55903 peter cwd DIR 259,2 4096 22284207
/home/peter/geneos/gateway/gateways/Demo Gateway
gateway2. 55903 peter rtd DIR 259,2 4096 2 /
...
gateway2. 55903 peter 19w REG 259,2 6014 22857682
/home/peter/.vscode-server/data/logs/20241108T084719/remoteagent.log
gateway2. 55903 peter 20w REG 259,2 2000 22857683
/home/peter/.vscode-server/data/logs/20241108T084719/ptyhost.log
gateway2. 55903 peter 21u CHR 5,2 0t0 91 /dev/ptmx
gateway2. 55903 peter 22u CHR 5,2 0t0 91 /dev/ptmx
gateway2. 55903 peter 23u CHR 5,2 0t0 91 /dev/ptmx
Am I missing anything?
Code (which is far from clean, sorry) is scattered
around https://github.com/ITRS-Group/cordial/blob/main/pkg/host/local.go#L214
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