163a3333d3
- Activate / Deactivate via flox activate --detach (with graceful SIGTERM→SIGKILL) - Non-privileged IsAlive process check with Linux /proc fallback - Dev-mode stub when flox is missing or FLOXENV_DEV_MODE=1 - Unit and integration tests Closes #16
46 lines
1 KiB
Go
46 lines
1 KiB
Go
package floxenv
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import (
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"fmt"
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"os"
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"strconv"
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"strings"
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"syscall"
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)
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// IsAlive returns true if the process identified by pid is still running.
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// It first attempts a zero-signal delivery test, then confirms on Linux
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// by inspecting /proc/<pid>/stat so that zombie processes are reported dead.
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func IsAlive(pid int) bool {
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if pid <= 0 {
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return false
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}
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if err := syscall.Kill(pid, 0); err != nil {
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return false
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}
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// Linux-specific confirmation to distinguish zombies.
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data, err := os.ReadFile(fmt.Sprintf("/proc/%d/stat", pid))
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if err != nil {
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// /proc may be unavailable in restricted spaces; trust signal result.
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return true
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}
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s := string(data)
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idx := strings.LastIndexByte(s, ')')
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if idx >= 0 && idx+2 < len(s) {
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state := s[idx+2]
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if state == 'Z' { // zombie
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return false
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}
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}
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return true
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}
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// IsAliveString wraps IsAlive with string-to-int conversion.
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// It returns false for any parse or signal error.
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func IsAliveString(s string) bool {
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pid, err := strconv.Atoi(s)
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if err != nil {
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return false
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}
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return IsAlive(pid)
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}
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