/** a Unix command to get the current user's name */
public final static String USER_NAME_COMMAND = "whoami";
/** a Unix command to get the current user's groups list */
public static String[] getGroupsCommand() {
return new String[]{"bash", "-c", "groups"};
}
/** a Unix command to get a given user's groups list */
public static String[] getGroupsForUserCommand(final String user) {
//'groups username' command return is non-consistent across different unixes
return new String [] {"bash", "-c", "id -Gn " + user};
}
/** a Unix command to get a given netgroup's user list */
public static String[] getUsersForNetgroupCommand(final String netgroup) {
//'groups username' command return is non-consistent across different unixes
return new String [] {"bash", "-c", "getent netgroup " + netgroup};
}
/** a Unix command to set permission */
public static final String SET_PERMISSION_COMMAND = "chmod";
/** a Unix command to set owner */
public static final String SET_OWNER_COMMAND = "chown";
public static final String SET_GROUP_COMMAND = "chgrp";
/** Return a Unix command to get permission information. */
public static String[] getGET_PERMISSION_COMMAND() {
//force /bin/ls, except on windows.
return new String[] {(WINDOWS ? "ls" : "/bin/ls"), "-ld"};
}
So, a simple way to solve this.
-
create a shell script file named as iamwho.sh and its content as simple as below,
echo "hadoopuser"
-
edit .bash_profile
vi ~/.bash_profile
-
add a line as below,
alias whoami="~/local/bin/iamwho.sh"
-
enable the modifition in current shell console,
source ~/.bash_profile
-
run command to check whoami command has been overwrited.
[yiyujia@localhost bin]$ whoami hadoopuser [yiyujia@localhost bin]$
