proc_linux.go RawHistoryFolder

1package platform
2
3import (
4	"fmt"
5	"os"
6	"strings"
7)
8
9// ProcessCwd returns the current working directory for a Linux process.
10func ProcessCwd(pid int) (string, error) {
11	return processCwd("/proc", pid)
12}
13
14func processCwd(root string, pid int) (string, error) {
15	if pid <= 0 {
16		return "", fmt.Errorf("process cwd: invalid pid %d", pid)
17	}
18	return os.Readlink(fmt.Sprintf("%s/%d/cwd", root, pid))
19}
20
21// ProcessComm returns the command name from /proc/<pid>/comm.
22func ProcessComm(pid int) (string, error) {
23	return processComm("/proc", pid)
24}
25
26func processComm(root string, pid int) (string, error) {
27	if pid <= 0 {
28		return "", fmt.Errorf("process comm: invalid pid %d", pid)
29	}
30	data, err := os.ReadFile(fmt.Sprintf("%s/%d/comm", root, pid))
31	if err != nil {
32		return "", fmt.Errorf("process comm: read pid %d: %w", pid, err)
33	}
34	comm := strings.TrimSpace(string(data))
35	if comm == "" {
36		return "", fmt.Errorf("process comm: empty comm for pid %d", pid)
37	}
38	return comm, nil
39}