Support for getStatvfs

[Martin-Zeithaml]

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PR type

What type of changes does your PR introduce to Zowe? Put an x in the box that applies to this PR. If you're unsure about any of them, don't hesitate to ask.

• Feature

Relevant issues

Fixes #807

Changes proposed in this PR

Javascript function to simply detect the file system flags - useful when fs is mounted with nosetuid option).

Does this PR introduce a breaking change?

• No

Test

import * as zosfs from '/zowe/bin/libs/zos-fs';
import * as shell from '/zowe/bin/libs/shell';

function runStatvfs(path) {
    const result = zosfs.getFileSystemFlags(`${path}`);
    if (result.rc == 0) {
        for (const [key, value] of Object.entries(result)) {
            if (typeof value == 'boolean') {
                let msg = `  ${key} -> ${value}`
                if (value) {
                    msg = msg.toUpperCase();
                }
                console.log(msg);
            }
        }
    }
}

function mountTestUnmount(fs, mp, sOptions) {
    console.log(`FS=${fs} with ${sOptions == '' ? 'no -s flag' : sOptions}`);
    shell.execSync('sh', '-c', `mount -t ZFS -f ${fs} ${sOptions} -o aggrgrow ${mp}`);
    runStatvfs(mp);
    shell.execSync('sh', '-c', `unmount ${mp}`);
}

const S_OPTION = [ '', '-s nosetuid', '-s nosecurity'];

for (let so in S_OPTION) {
    mountTestUnmount('ZOWE.ZFS', '/mnt/test', S_OPTION[so]);
}

console.log('Root fs should be read only');
runStatvfs('/');

FS=ZOWE.ZFS with no -s flag
  exported -> false
  rdonly -> false
  nosuid -> false
  nosecurity -> false
FS=ZOWE.ZFS with -s nosetuid
  exported -> false
  rdonly -> false
  NOSUID -> TRUE
  nosecurity -> false
FS=ZOWE.ZFS with -s nosecurity
  exported -> false
  rdonly -> false
  NOSUID -> TRUE
  NOSECURITY -> TRUE
Root fs should be read only
  exported -> false
  RDONLY -> TRUE
  nosuid -> false
  nosecurity -> false

[github-actions]

build 6047 SUCCEEDED.
Link to workflow run: https://github.com/zowe/zowe-install-packaging/actions/runs/10881751116

[github-actions]

Test workflow 5385 is started.
Running install test: Convenience Pax
The zowe artifact being used by this test workflow: libs-snapshot-local/org/zowe/3.0.0-PR-3994/zowe-3.0.0-pr-3994-6047-20240916101919.pax
Running on machine: zzow07
Result: FAILURE
Link to workflow run: https://github.com/zowe/zowe-install-packaging/actions/runs/10881866999

[github-actions]

build 6048 SUCCEEDED.
Link to workflow run: https://github.com/zowe/zowe-install-packaging/actions/runs/10882097370

[github-actions]

Test workflow 5386 is started.
Running install test: Convenience Pax
The zowe artifact being used by this test workflow: libs-snapshot-local/org/zowe/3.0.0-PR-3994/zowe-3.0.0-pr-3994-6048-20240916104203.pax
Running on machine: zzow06
Result: FAILURE
Link to workflow run: https://github.com/zowe/zowe-install-packaging/actions/runs/10882202994

[github-actions]

build 6048 SUCCEEDED.
Link to workflow run: https://github.com/zowe/zowe-install-packaging/actions/runs/10882097370

[github-actions]

Test workflow 5394 is started.
Running install test: Convenience Pax
The zowe artifact being used by this test workflow: libs-snapshot-local/org/zowe/3.0.0-PR-3994/zowe-3.0.0-pr-3994-6048-20240917072237.pax
Running on machine: zzow08
Result: FAILURE
Link to workflow run: https://github.com/zowe/zowe-install-packaging/actions/runs/10898418714

[github-actions]

build 6057 SUCCEEDED.
Link to workflow run: https://github.com/zowe/zowe-install-packaging/actions/runs/10905602351

[github-actions]

Test workflow 5396 is started.
Running install test: Convenience Pax
The zowe artifact being used by this test workflow: libs-snapshot-local/org/zowe/3.0.0-PR-3994/zowe-3.0.0-pr-3994-6057-20240917150347.pax
Running on machine: zzow06
Result: SUCCESS
Link to workflow run: https://github.com/zowe/zowe-install-packaging/actions/runs/10905795058

[github-actions]

build 6131 SUCCEEDED.
Link to workflow run: https://github.com/zowe/zowe-install-packaging/actions/runs/10991343313

[github-actions]

Test workflow 5454 is started.
Running install test: Convenience Pax
The zowe artifact being used by this test workflow: libs-snapshot-local/org/zowe/3.0.0-PR-3994/zowe-3.0.0-pr-3994-6131-20240923092629.pax
Running on machine: zzow07
Result: SUCCESS
Link to workflow run: https://github.com/zowe/zowe-install-packaging/actions/runs/10991445076