JM プロジェクトは、主に Linux 関連のマニュアルページの日本語ページを翻訳・公開しています。
... : */ _DEFAULT_SOURCE || /* Glibc versions <= 2.19: */ _SVID_SOURCE || _BSD_SOURCE 説明 The clearenv () function clears the environment of all name-value pairs and sets the value of the external variable environ to NULL. After this call, new variables can be ... added to the environment using putenv (3) and setenv (3). 返り値 clearenv () 関数は、成功した場合は 0 を返し、 失敗した場合は 0 以外を返す。 バージ ... 定すればよい。 The clearenv () function may be useful in security-conscious applications that want to precisely control the environment that is passed to programs executed using exec (3). The application would do this by first clearing the environment and th ... ... e exec (3) call that started the process. When a child process is created via fork (2), it inherits a copy of its parent's environment. 通例では、 environ の文字列は " name = value " という書式をとる。 よく用いられる例を以下に示す。 USER ユーザーのログイン名 ... DITOR / VISUAL テキストファイルを編集するユーテリティ。ユーザーが好みのものを設定する。 Names may be placed in the shell's environment by the export command in sh (1), or by the setenv command if you use csh (1). The initial environment of the shell is popu ... lated in various ways, such as definitions from /etc/environment that are processed by pam_env (8) for all users at login time (on systems that employ pam (8)). In addition, various shell ... ... ated with the file being executed. The array of pointers must be terminated by a null pointer. e - execle(), execvpe() The environment of the caller is specified via the argument envp . The envp argument is an array of pointers to null-terminated strings an ... d must be terminated by a null pointer. All other exec () functions (which do not include 'e' in the suffix) take the environment for the new process image from the external variable environ in the calling process. p - execlp(), execvp(), execvpe() The ... contain a slash (/) character. The file is sought in the colon-separated list of directory pathnames specified in the PATH environment variable. If this variable isn't defined, the path list defaults to a list that includes the directories returned by confs ... ... ated with the file being executed. The array of pointers must be terminated by a null pointer. e - execle(), execvpe() The environment of the caller is specified via the argument envp . The envp argument is an array of pointers to null-terminated strings an ... d must be terminated by a null pointer. All other exec () functions (which do not include 'e' in the suffix) take the environment for the new process image from the external variable environ in the calling process. p - execlp(), execvp(), execvpe() The ... contain a slash (/) character. The file is sought in the colon-separated list of directory pathnames specified in the PATH environment variable. If this variable isn't defined, the path list defaults to a list that includes the directories returned by confs ... ... ated with the file being executed. The array of pointers must be terminated by a null pointer. e - execle(), execvpe() The environment of the caller is specified via the argument envp . The envp argument is an array of pointers to null-terminated strings an ... d must be terminated by a null pointer. All other exec () functions (which do not include 'e' in the suffix) take the environment for the new process image from the external variable environ in the calling process. p - execlp(), execvp(), execvpe() The ... contain a slash (/) character. The file is sought in the colon-separated list of directory pathnames specified in the PATH environment variable. If this variable isn't defined, the path list defaults to a list that includes the directories returned by confs ... ... ated with the file being executed. The array of pointers must be terminated by a null pointer. e - execle(), execvpe() The environment of the caller is specified via the argument envp . The envp argument is an array of pointers to null-terminated strings an ... d must be terminated by a null pointer. All other exec () functions (which do not include 'e' in the suffix) take the environment for the new process image from the external variable environ in the calling process. p - execlp(), execvp(), execvpe() The ... contain a slash (/) character. The file is sought in the colon-separated list of directory pathnames specified in the PATH environment variable. If this variable isn't defined, the path list defaults to a list that includes the directories returned by confs ... ... ated with the file being executed. The array of pointers must be terminated by a null pointer. e - execle(), execvpe() The environment of the caller is specified via the argument envp . The envp argument is an array of pointers to null-terminated strings an ... d must be terminated by a null pointer. All other exec () functions (which do not include 'e' in the suffix) take the environment for the new process image from the external variable environ in the calling process. p - execlp(), execvp(), execvpe() The ... contain a slash (/) character. The file is sought in the colon-separated list of directory pathnames specified in the PATH environment variable. If this variable isn't defined, the path list defaults to a list that includes the directories returned by confs ... ... ated with the file being executed. The array of pointers must be terminated by a null pointer. e - execle(), execvpe() The environment of the caller is specified via the argument envp . The envp argument is an array of pointers to null-terminated strings an ... d must be terminated by a null pointer. All other exec () functions (which do not include 'e' in the suffix) take the environment for the new process image from the external variable environ in the calling process. p - execlp(), execvp(), execvpe() The ... contain a slash (/) character. The file is sought in the colon-separated list of directory pathnames specified in the PATH environment variable. If this variable isn't defined, the path list defaults to a list that includes the directories returned by confs ... ... ated with the file being executed. The array of pointers must be terminated by a null pointer. e - execle(), execvpe() The environment of the caller is specified via the argument envp . The envp argument is an array of pointers to null-terminated strings an ... d must be terminated by a null pointer. All other exec () functions (which do not include 'e' in the suffix) take the environment for the new process image from the external variable environ in the calling process. p - execlp(), execvp(), execvpe() The ... contain a slash (/) character. The file is sought in the colon-separated list of directory pathnames specified in the PATH environment variable. If this variable isn't defined, the path list defaults to a list that includes the directories returned by confs ... ... は、 結果として得られた環境を印刷する。 この動作はコマンドに printenv (1) を指定したときと同じ。 オプション -, -i, --ignore-environment 継承された環境を無視して、空の環境から始める。 -u, --unset name 変数 name が環境にあれば削除する --help 標準出力に使用方法 ... 日本語の文書やマニュアルを配布している個人/プロジェクトへのリンクです。