Programming

#!/bin/sh

first()
{
        echo $1
}

for n in $@
do
        /usr/bin/alias | while read STR
        do
                NAME=`echo $STR | sed y/=/\ /`
                FIRST=`first $NAME`
                if test "$FIRST" = "$n"
                then
                        echo $STR | sed s/$n=//
                fi
        done

        if test -f $n
        then
                echo $n
        fi

        for d in `echo $PATH | sed y/:/\ /`
        do
                if test -f $d/$n
                then
                        echo $d/$n
                fi
        done
done

 fp = popen("alias","r");
            if(fp == NULL)
            {
                  printf("Handle Error");
            }
            printf("You asked for an alias");
            while(fgets(alia,20,fp) != NULL)
            printf("%s",alia);
            pclose(fp);

which alias

bash -c alias
ksh -c alias
zsh -c alias
sh -c alias
csh -c alias