Get started on test command

3 files changed, 83 insertions, 1 deletions

diff --git a/cmds/cmds.go b/cmds/cmds.go
index 0cfee5e..f5b0081 100644
--- a/cmds/cmds.go
+++ b/cmds/cmds.go
@@ -1,7 +1,11 @@
 // cmds: handles system commands
 package cmds
 
-import "strings"
+import (
+	"strings"
+
+	"gosh/global"
+)
 
 // Eval: evaluates a provided string into a command
 // if it can't find the command or the arguments are incorrect
@@ -31,6 +35,9 @@ func Eval(cmd string) error {
 			printEnv()
 		}
 		break
+	case "test", "[":
+		global.ReturnCode = test(args)
+		break
 	case "exit":
 		if err := exit(args); err != nil {
 			return err
diff --git a/cmds/test.go b/cmds/test.go
new file mode 100644
index 0000000..77534a3
--- /dev/null
+++ b/cmds/test.go
@@ -0,0 +1,73 @@
+package cmds
+
+import (
+	"os"
+	"os/user"
+	"strconv"
+	"syscall"
+)
+
+func test(args []string) int {
+	if len(args) <= 2 {
+		return 1
+	}
+
+	fi, err := os.Lstat(args[2])
+	c, _ := user.Current()
+	if err != nil {
+		return 1
+	}
+
+	switch args[1] {
+	case "-e":
+		return 0
+	case "-f":
+		if !fi.IsDir() {
+			return 0
+		}
+		break
+	case "-d":
+		if fi.IsDir() {
+			return 0
+		}
+		break
+	case "-r":
+		if fi.Mode().Perm() & 0400 != 0 {
+			return 0
+		}
+		break
+	case "-w":
+		if fi.Mode().Perm() & 0200 != 0 {
+			return 0
+		}
+		break
+	case "-x":
+		if fi.Mode().Perm() & 0100 != 0 {
+			return 0
+		}
+		break
+	case "-S":
+		if fi.Size() > 0 {
+			return 0
+		}
+		break
+	case "-L":
+		if fi.Mode() & os.ModeSymlink != 0 {
+			return 0
+		}
+		break
+	case "-O":
+		s := fi.Sys().(*syscall.Stat_t)
+		if c.Uid == strconv.Itoa(int(s.Uid)) {
+			return 0
+		}
+		break
+	case "-G":
+		s := fi.Sys().(*syscall.Stat_t)
+		if c.Gid == strconv.Itoa(int(s.Gid)) {
+			return 0
+		}
+		break
+	}
+	return 1
+}
diff --git a/global/global.go b/global/global.go
index 610fa38..f84a340 100644
--- a/global/global.go
+++ b/global/global.go
@@ -1,7 +1,9 @@
 package global
 
 var Options []string
+var ReturnCode int
 
 func init() {
 	Options = make([]string, 0)
+	ReturnCode = 0
 }