/
builtin_fn_cmd_unix.go
84 lines (71 loc) · 1.49 KB
/
builtin_fn_cmd_unix.go
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// +build !windows,!plan9
package eval
import (
"os"
"os/exec"
"strconv"
"syscall"
"github.com/elves/elvish/eval/vals"
"github.com/elves/elvish/sys"
)
func execFn(fm *Frame, args ...interface{}) error {
var argstrings []string
if len(args) == 0 {
argstrings = []string{"elvish"}
} else {
argstrings = make([]string, len(args))
for i, a := range args {
argstrings[i] = vals.ToString(a)
}
}
var err error
argstrings[0], err = exec.LookPath(argstrings[0])
if err != nil {
return err
}
preExit(fm)
return syscall.Exec(argstrings[0], argstrings, os.Environ())
}
func fg(pids ...int) error {
if len(pids) == 0 {
return ErrArgs
}
var thepgid int
for i, pid := range pids {
pgid, err := syscall.Getpgid(pid)
if err != nil {
return err
}
if i == 0 {
thepgid = pgid
} else if pgid != thepgid {
return ErrNotInSameGroup
}
}
err := sys.Tcsetpgrp(0, thepgid)
if err != nil {
return err
}
errors := make([]*Exception, len(pids))
for i, pid := range pids {
err := syscall.Kill(pid, syscall.SIGCONT)
if err != nil {
errors[i] = &Exception{err, nil}
}
}
for i, pid := range pids {
if errors[i] != nil {
continue
}
var ws syscall.WaitStatus
_, err = syscall.Wait4(pid, &ws, syscall.WUNTRACED, nil)
if err != nil {
errors[i] = &Exception{err, nil}
} else {
// TODO find command name
errors[i] = &Exception{NewExternalCmdExit(
"[pid "+strconv.Itoa(pid)+"]", ws, pid), nil}
}
}
return ComposeExceptionsFromPipeline(errors)
}