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// Program posix is a test case to confirm that Go is capable of
// exhibiting posix semantics for system calls.
//
// This code is a template for two programs: posix.go and posix-cgo.go
// which are built by the Makefile to using sed.
package main
import (
"fmt"
"io/ioutil"
"log"
"os"
"strings"
"syscall"
)
// main_here
func dumpStatus(testCase string, err error, filter, expect string) bool {
fmt.Printf("%s [%v]:\n", testCase, err)
var failed bool
pid := syscall.Getpid()
fs, err := ioutil.ReadDir(fmt.Sprintf("/proc/%d/task", pid))
if err != nil {
log.Fatal(err)
}
for _, f := range fs {
tf := fmt.Sprintf("/proc/%s/status", f.Name())
d, err := ioutil.ReadFile(tf)
if err != nil {
fmt.Println(tf, err)
failed = true
continue
}
lines := strings.Split(string(d), "\n")
for _, line := range lines {
if strings.HasPrefix(line, filter) {
fails := line != expect
failure := ""
if fails {
failed = fails
failure = " (bad)"
}
fmt.Printf("%s %s%s\n", tf, line, failure)
break
}
}
}
return failed
}
func ptest() {
var err error
var bad bool
// egid setting
bad = bad || dumpStatus("initial state", nil, "Gid:", "Gid:\t0\t0\t0\t0")
err = syscall.Setegid(1001)
bad = bad || dumpStatus("setegid(1001) state", err, "Gid:", "Gid:\t0\t1001\t0\t1001")
err = syscall.Setegid(1002)
bad = bad || dumpStatus("setegid(1002) state", err, "Gid:", "Gid:\t0\t1002\t0\t1002")
err = syscall.Setegid(0)
bad = bad || dumpStatus("setegid(0) state", err, "Gid:", "Gid:\t0\t0\t0\t0")
// euid setting (no way back from this one)
bad = bad || dumpStatus("initial euid", nil, "Uid:", "Uid:\t0\t0\t0\t0")
err = syscall.Seteuid(1)
bad = bad || dumpStatus("seteuid(1)", err, "Uid:", "Uid:\t0\t1\t0\t1")
err = syscall.Seteuid(0)
bad = bad || dumpStatus("seteuid(0)", err, "Uid:", "Uid:\t0\t0\t0\t0")
// gid setting
bad = bad || dumpStatus("initial state", nil, "Gid:", "Gid:\t0\t0\t0\t0")
err = syscall.Setgid(1001)
bad = bad || dumpStatus("setgid(1001) state", err, "Gid:", "Gid:\t1001\t1001\t1001\t1001")
err = syscall.Setgid(1002)
bad = bad || dumpStatus("setgid(1002) state", err, "Gid:", "Gid:\t1002\t1002\t1002\t1002")
err = syscall.Setgid(0)
bad = bad || dumpStatus("setgid(0) state", err, "Gid:", "Gid:\t0\t0\t0\t0")
// groups setting
bad = bad || dumpStatus("initial groups", nil, "Groups:", "Groups:\t0 ")
err = syscall.Setgroups([]int{0, 1, 2, 3})
bad = bad || dumpStatus("setgroups(0,1,2,3)", err, "Groups:", "Groups:\t0 1 2 3 ")
err = syscall.Setgroups([]int{3, 2, 1})
bad = bad || dumpStatus("setgroups(2,3,1)", err, "Groups:", "Groups:\t1 2 3 ")
err = syscall.Setgroups(nil)
bad = bad || dumpStatus("setgroups(nil)", err, "Groups:", "Groups:\t ")
err = syscall.Setgroups([]int{0})
bad = bad || dumpStatus("setgroups(0)", err, "Groups:", "Groups:\t0 ")
// regid setting
bad = bad || dumpStatus("initial state", nil, "Gid:", "Gid:\t0\t0\t0\t0")
err = syscall.Setregid(1001, 0)
bad = bad || dumpStatus("setregid(1001) state", err, "Gid:", "Gid:\t1001\t0\t0\t0")
err = syscall.Setregid(0, 1002)
bad = bad || dumpStatus("setregid(1002) state", err, "Gid:", "Gid:\t0\t1002\t1002\t1002")
err = syscall.Setregid(0, 0)
bad = bad || dumpStatus("setregid(0) state", err, "Gid:", "Gid:\t0\t0\t0\t0")
// reuid setting
bad = bad || dumpStatus("initial state", nil, "Uid:", "Uid:\t0\t0\t0\t0")
err = syscall.Setreuid(1, 0)
bad = bad || dumpStatus("setreuid(1,0) state", err, "Uid:", "Uid:\t1\t0\t0\t0")
err = syscall.Setreuid(0, 2)
bad = bad || dumpStatus("setreuid(0,2) state", err, "Uid:", "Uid:\t0\t2\t2\t2")
err = syscall.Setreuid(0, 0)
bad = bad || dumpStatus("setreuid(0) state", err, "Uid:", "Uid:\t0\t0\t0\t0")
// resgid setting
bad = bad || dumpStatus("initial state", nil, "Gid:", "Gid:\t0\t0\t0\t0")
err = syscall.Setresgid(1, 0, 2)
bad = bad || dumpStatus("setresgid(1,0,2) state", err, "Gid:", "Gid:\t1\t0\t2\t0")
err = syscall.Setresgid(0, 2, 1)
bad = bad || dumpStatus("setresgid(0,2,1) state", err, "Gid:", "Gid:\t0\t2\t1\t2")
err = syscall.Setresgid(0, 0, 0)
bad = bad || dumpStatus("setresgid(0) state", err, "Gid:", "Gid:\t0\t0\t0\t0")
// resuid setting
bad = bad || dumpStatus("initial state", nil, "Uid:", "Uid:\t0\t0\t0\t0")
err = syscall.Setresuid(1, 0, 2)
bad = bad || dumpStatus("setresuid(1,0,2) state", err, "Uid:", "Uid:\t1\t0\t2\t0")
err = syscall.Setresuid(0, 2, 1)
bad = bad || dumpStatus("setresuid(0,2,1) state", err, "Uid:", "Uid:\t0\t2\t1\t2")
err = syscall.Setresuid(0, 0, 0)
bad = bad || dumpStatus("setresuid(0) state", err, "Uid:", "Uid:\t0\t0\t0\t0")
// uid setting (no way back from this one)
bad = bad || dumpStatus("initial uid", nil, "Uid:", "Uid:\t0\t0\t0\t0")
err = syscall.Setuid(1)
bad = bad || dumpStatus("setuid(1)", err, "Uid:", "Uid:\t1\t1\t1\t1")
err = syscall.Setuid(0)
bad = bad || dumpStatus("setuid(0)", err, "Uid:", "Uid:\t1\t1\t1\t1")
if bad {
log.Print("TEST FAILED")
os.Exit(1)
}
log.Print("TEST PASSED")
}
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