Perl getgrgid 函式

說明

此函式按組 ID 查詢組檔案條目。在列表上下文中返回以下內容 −

($name, $passwd, $gid, $members)

$members 標量包含屬於該組的登入名的空格分隔列表。在標量上下文中返回組名。有關檢索整個組檔案的更有效的方法，請參閱 getgrent。在 Windows 中，考慮使用 Win32API::Net 模組。

語法

以下是此函式的簡單語法 −

getgrgid GID

返回值

此函式在標量上下文中返回組名，在列表上下文中返回 (名稱、密碼、組 ID 和成員列表。

示例

以下是顯示其基本用法示例程式碼 −

#!/usr/bin/perl

while( ($name,$passwd,$gid,$members) = getgrent() ) {
   ($name,$passwd,$gid,$members) = getgrgid $gid;
   print "Name  = $name\n";
   print "Password  = $passwd\n";
   print "GID  = $gid\n";
   print "Members  = $members\n";
}

當執行上述程式碼時，它會產生以下結果 −

Name  = root
Password  = x
GID  = 0
Members  = 
Name  = bin
Password  = x
GID  = 1
Members  = 
Name  = daemon
Password  = x
GID  = 2
Members  = 
Name  = sys
Password  = x
GID  = 3
Members  = 
Name  = adm
Password  = x
GID  = 4
Members  = 
Name  = tty
Password  = x
GID  = 5
Members  = 
Name  = disk
Password  = x
GID  = 6
Members  = 
Name  = lp
Password  = x
GID  = 7
Members  = 
.
.
.
.
Name  = apache
Password  = x
GID  = 48
Members  = 
Name  = rexx
Password  = x
GID  = 1001
Members  = 
Name  = objc
Password  = x
GID  = 1002
Members  =