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SendEnv SetEnv
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,157 @@ | ||
| /* | ||
| MIT License | ||
| Copyright (c) 2023 Lonny Wong <[email protected]> | ||
| Copyright (c) 2023 [Contributors](https://github.com/trzsz/trzsz-ssh/graphs/contributors) | ||
| Permission is hereby granted, free of charge, to any person obtaining a copy | ||
| of this software and associated documentation files (the "Software"), to deal | ||
| in the Software without restriction, including without limitation the rights | ||
| to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
| copies of the Software, and to permit persons to whom the Software is | ||
| furnished to do so, subject to the following conditions: | ||
| The above copyright notice and this permission notice shall be included in all | ||
| copies or substantial portions of the Software. | ||
| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
| AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
| OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | ||
| SOFTWARE. | ||
| */ | ||
|
|
||
| package tssh | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "os" | ||
| "regexp" | ||
| "strings" | ||
|
|
||
| "github.com/google/shlex" | ||
| "golang.org/x/crypto/ssh" | ||
| ) | ||
|
|
||
| type sshEnv struct { | ||
| name string | ||
| value string | ||
| } | ||
|
|
||
| func getSendEnvs(args *sshArgs) ([]*sshEnv, error) { | ||
| envSet := make(map[string]struct{}) | ||
| for _, envCfg := range getAllOptionConfig(args, "SendEnv") { | ||
| for _, env := range strings.Fields(envCfg) { | ||
| if len(env) > 0 { | ||
| envSet[env] = struct{}{} | ||
| } | ||
| } | ||
| } | ||
| if len(envSet) == 0 { | ||
| return nil, nil | ||
| } | ||
|
|
||
| var buf strings.Builder | ||
| for env := range envSet { | ||
| if buf.Len() > 0 { | ||
| buf.WriteRune('|') | ||
| } | ||
| buf.WriteString("(^") | ||
| for _, c := range env { | ||
| switch c { | ||
| case '*': | ||
| buf.WriteString(".*") | ||
| case '?': | ||
| buf.WriteRune('.') | ||
| case '(', ')', '[', ']', '{', '}', '.', '+', ',', '-', '^', '$', '|', '\\': | ||
| buf.WriteRune('\\') | ||
| buf.WriteRune(c) | ||
| default: | ||
| buf.WriteRune(c) | ||
| } | ||
| } | ||
| buf.WriteString("$)") | ||
| } | ||
| expr := buf.String() | ||
| debug("send env regexp: %s", expr) | ||
|
|
||
| re, err := regexp.Compile(expr) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("compile SendEnv regexp failed: %v", err) | ||
| } | ||
|
|
||
| var envs []*sshEnv | ||
| for _, env := range os.Environ() { | ||
| var name string | ||
| pos := strings.IndexRune(env, '=') | ||
| if pos < 0 { | ||
| name = strings.TrimSpace(env) | ||
| } else { | ||
| name = strings.TrimSpace(env[:pos]) | ||
| } | ||
| if !re.MatchString(name) { | ||
| continue | ||
| } | ||
| var value string | ||
| if pos >= 0 { | ||
| value = strings.TrimSpace(env[pos+1:]) | ||
| } | ||
| envs = append(envs, &sshEnv{name, value}) | ||
| } | ||
| return envs, nil | ||
| } | ||
|
|
||
| func getSetEnvs(args *sshArgs) ([]*sshEnv, error) { | ||
| envCfg := getOptionConfig(args, "SetEnv") | ||
| if envCfg == "" { | ||
| return nil, nil | ||
| } | ||
| tokens, err := shlex.Split(envCfg) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("invalid SetEnv: %s", envCfg) | ||
| } | ||
| var envs []*sshEnv | ||
| for _, token := range tokens { | ||
| pos := strings.IndexRune(token, '=') | ||
| if pos < 0 { | ||
| return nil, fmt.Errorf("invalid SetEnv: %s", envCfg) | ||
| } | ||
| name := strings.TrimSpace(token[:pos]) | ||
| if name == "" { | ||
| return nil, fmt.Errorf("invalid SetEnv: %s", envCfg) | ||
| } | ||
| value := strings.TrimSpace(token[pos+1:]) | ||
| envs = append(envs, &sshEnv{name, value}) | ||
| } | ||
| return envs, nil | ||
| } | ||
|
|
||
| func sendAndSetEnv(args *sshArgs, session *ssh.Session) error { | ||
| envs, err := getSendEnvs(args) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| for _, env := range envs { | ||
| if err := session.Setenv(env.name, env.value); err != nil { | ||
| debug("send env failed: %s = \"%s\"", env.name, env.value) | ||
| } else { | ||
| debug("send env success: %s = \"%s\"", env.name, env.value) | ||
| } | ||
| } | ||
|
|
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| envs, err = getSetEnvs(args) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| for _, env := range envs { | ||
| if err := session.Setenv(env.name, env.value); err != nil { | ||
| debug("set env failed: %s = \"%s\"", env.name, env.value) | ||
| } else { | ||
| debug("set env success: %s = \"%s\"", env.name, env.value) | ||
| } | ||
| } | ||
|
|
||
| return nil | ||
| } |
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