main.go

Documentation: github.com/tetratelabs/wazero/internal/gojs/testdata/process

     1  // Package process is an integration test of system calls mapped to the
     2  // JavaScript object "process". e.g. `go.syscall/js.valueCall(process.chdir...`
     3  package process
     4  
     5  import (
     6  	"fmt"
     7  	"log"
     8  	"os"
     9  	"syscall"
    10  )
    11  
    12  func Main() {
    13  	fmt.Printf("syscall.Getpid()=%d\n", syscall.Getpid())
    14  	fmt.Printf("syscall.Getppid()=%d\n", syscall.Getppid())
    15  	fmt.Printf("syscall.Getuid()=%d\n", syscall.Getuid())
    16  	fmt.Printf("syscall.Getgid()=%d\n", syscall.Getgid())
    17  	fmt.Printf("syscall.Geteuid()=%d\n", syscall.Geteuid())
    18  	fmt.Printf("syscall.Umask(0077)=%O\n", syscall.Umask(0o077))
    19  	if g, err := syscall.Getgroups(); err != nil {
    20  		log.Panicln(err)
    21  	} else {
    22  		fmt.Printf("syscall.Getgroups()=%v\n", g)
    23  	}
    24  
    25  	pid := syscall.Getpid()
    26  	if p, err := os.FindProcess(pid); err != nil {
    27  		log.Panicln(err)
    28  	} else {
    29  		fmt.Printf("os.FindProcess(%d).Pid=%d\n", pid, p.Pid)
    30  	}
    31  
    32  	if wd, err := syscall.Getwd(); err != nil {
    33  		log.Panicln(err)
    34  	} else if wd != "/" {
    35  		log.Panicln("not root")
    36  	}
    37  	fmt.Println("wd ok")
    38  
    39  	dirs := []struct {
    40  		path, wd string
    41  	}{
    42  		{"dir", "/dir"},
    43  		{".", "/dir"},
    44  		{"..", "/"},
    45  		{".", "/"},
    46  		{"..", "/"},
    47  	}
    48  
    49  	for _, dir := range dirs {
    50  		if err := syscall.Chdir(dir.path); err != nil {
    51  			log.Panicln(dir.path, err)
    52  		} else if wd, err := syscall.Getwd(); err != nil {
    53  			log.Panicln(dir.path, err)
    54  		} else if wd != dir.wd {
    55  			log.Panicf("cd %s: expected wd=%s, but have %s", dir.path, dir.wd, wd)
    56  		}
    57  	}
    58  
    59  	if err := syscall.Chdir("/animals.txt"); err == nil {
    60  		log.Panicln("shouldn't be able to chdir to file")
    61  	} else {
    62  		fmt.Println(err) // should be the textual message of the errno.
    63  	}
    64  }
    65
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