go.chromium.org/luci@v0.0.0-20240309015107-7cdc2e660f33/vpython/application/system_posix.go (about)

     1  // Copyright 2017 The LUCI Authors.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //      http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  //go:build unix
    16  // +build unix
    17  
    18  package application
    19  
    20  import (
    21  	"context"
    22  	"os"
    23  	"syscall"
    24  
    25  	"go.chromium.org/luci/common/errors"
    26  	"go.chromium.org/luci/common/system/environ"
    27  )
    28  
    29  func execImpl(c context.Context, argv []string, env environ.Env, dir string) error {
    30  	// Change directory.
    31  	if dir != "" {
    32  		if err := os.Chdir(dir); err != nil {
    33  			return errors.Annotate(err, "failed to chdir to %q", dir).Err()
    34  		}
    35  	}
    36  
    37  	if err := syscall.Exec(argv[0], argv, env.Sorted()); err != nil {
    38  		panic(errors.Annotate(err, "failed to execve %q", argv[0]).Err())
    39  	}
    40  	panic("must not return")
    41  }