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Updated wrench to use cli

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This commit is contained in:
Sasha Koshka 2023-05-30 18:03:26 -04:00
parent 9d8e6e8e24
commit 1a5502211e
1 changed files with 31 additions and 42 deletions
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73
cmd/wrench/main.go
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@ -6,24 +6,14 @@ import "flag"
import "strconv"
import "os/exec"
import "os/user"
import "hnakra/cli"
import "path/filepath"
import "golang.org/x/crypto/bcrypt"
func printErr (format string, values ...any) {
fmt.Fprintf (
flag.CommandLine.Output(),
os.Args[0] + ": " + format + "\n",
values...)
}
func serviceUser (service string) string {
return "hn-" + service
}
func tryCommand (cmd *exec.Cmd, failReason string) {
output, err := cmd.CombinedOutput()
if err != nil {
printErr("%s: %s", failReason, string(output))
cli.Sayf("%s: %s\n", failReason, string(output))
os.Exit(1)
}
}
@ -31,13 +21,13 @@ func tryCommand (cmd *exec.Cmd, failReason string) {
func ownOne (path string, uid, gid int) {
file, err := os.Stat(path)
if err != nil {
printErr("could not stat %s: %v", path, err)
cli.Sayf("could not stat %s: %v\n", path, err)
return
}
err = os.Chown(path, uid, gid)
if err != nil {
printErr("could not change ownership of %s: %v", path, err)
cli.Sayf("could not change ownership of %s: %v\n", path, err)
return
}
@ -47,7 +37,7 @@ func ownOne (path string, uid, gid int) {
err = os.Chmod(path, 0660)
}
if err != nil {
printErr("could not change mode of %s: %v", path, err)
cli.Sayf("could not change mode of %s: %v\n", path, err)
return
}
}
@ -55,23 +45,22 @@ func ownOne (path string, uid, gid int) {
func main () {
user, err := user.Current()
if err != nil {
printErr("could not get username %v", err)
cli.Sayf("could not get username %v\n", err)
os.Exit(1)
}
flag.Usage = func () {
out := flag.CommandLine.Output()
fmt.Fprintf(out, "Usage of %s:\n", os.Args[0])
fmt.Fprintf(out, " hash\n")
fmt.Fprintf(out, " Generate a bcrypt hash of a key\n")
fmt.Fprintf(out, " adduser\n")
fmt.Fprintf(out, " Add a system user to run a service as\n")
fmt.Fprintf(out, " deluser\n")
fmt.Fprintf(out, " Remove a user added with adduser\n")
fmt.Fprintf(out, " auth\n")
fmt.Fprintf(out, " Authorize a system user to access a service's files\n")
fmt.Fprintf(out, " own\n")
fmt.Fprintf(out, " Give ownership of a file to a service\n")
cli.Printf("Usage of %s:\n", os.Args[0])
cli.Printf(" hash\n")
cli.Printf(" Generate a bcrypt hash of a key\n")
cli.Printf(" adduser\n")
cli.Printf(" Add a system user to run a service as\n")
cli.Printf(" deluser\n")
cli.Printf(" Remove a user added with adduser\n")
cli.Printf(" auth\n")
cli.Printf(" Authorize a system user to access a service's files\n")
cli.Printf(" own\n")
cli.Printf(" Give ownership of a file to a service\n")
os.Exit(1)
}
@ -131,22 +120,22 @@ func main () {
func execHash (cost int, key string) {
if key == "" {
printErr("please specify key text content")
cli.Sayf("please specify key text content\n")
os.Exit(1)
}
if cost < bcrypt.MinCost {
printErr("cost is too low, must be at least %v", bcrypt.MinCost)
cli.Sayf("cost is too low, must be at least %v\n", bcrypt.MinCost)
os.Exit(1)
}
if cost > bcrypt.MaxCost {
printErr("cost is too hight, can be at most %v", bcrypt.MaxCost)
cli.Sayf("cost is too hight, can be at most %v\n", bcrypt.MaxCost)
os.Exit(1)
}
hash, err := bcrypt.GenerateFromPassword([]byte(key), cost)
if err != nil {
printErr("could not hash key: %v", err)
cli.Sayf("could not hash key: %v\n", err)
os.Exit(1)
}
@ -154,7 +143,7 @@ func execHash (cost int, key string) {
}
func execAdduser (service string) {
fullName := serviceUser(service)
fullName := cli.ServiceUser(service)
// BUSYBOX
adduser, err := exec.LookPath("adduser")
@ -176,12 +165,12 @@ func execAdduser (service string) {
return
}
printErr("could not add user: no command adduser or useradd")
cli.Sayf("could not add user: no command adduser or useradd\n")
os.Exit(1)
}
func execDeluser (service string) {
fullName := serviceUser(service)
fullName := cli.ServiceUser(service)
// BUSYBOX
deluser, err := exec.LookPath("deluser")
@ -202,12 +191,12 @@ func execDeluser (service string) {
return
}
printErr("could not delete user: no command deluser or userdel")
cli.Sayf("could not delete user: no command deluser or userdel\n")
os.Exit(1)
}
func execAuth (service, user string) {
fullName := serviceUser(service)
fullName := cli.ServiceUser(service)
adduser, err := exec.LookPath("adduser")
if err == nil {
@ -224,19 +213,19 @@ func execAuth (service, user string) {
return
}
printErr("could not auth user: no command adduser or usermod")
cli.Sayf("could not auth user: no command adduser or usermod\n")
os.Exit(1)
}
func execOwn (service, file string, recurse bool) {
fullName := serviceUser(service)
fullName := cli.ServiceUser(service)
userInfo, err := user.Lookup(fullName)
uid, _ := strconv.Atoi(userInfo.Uid)
gid, _ := strconv.Atoi(userInfo.Gid)
if err != nil {
printErr("could not get user info: %v", err)
cli.Sayf("could not get user info: %v\n", err)
os.Exit(1)
}
@ -251,7 +240,7 @@ func execOwn (service, file string, recurse bool) {
err error,
) error {
if err != nil {
printErr("could not traverse filesystem: %v", err)
cli.Sayf("could not traverse filesystem: %v\n", err)
return nil
}
@ -260,7 +249,7 @@ func execOwn (service, file string, recurse bool) {
})
if err != nil {
printErr("could not traverse filesystem: %v", err)
cli.Sayf("could not traverse filesystem: %v\n", err)
os.Exit(1)
}
}