ece282/lab04/uid_to_name.c

#include        <pwd.h>
#include	<stddef.h>
#include	<stdio.h>

char *uid_to_name( uid_t uid )
/*
 *      returns pointer to username associated with uid, uses getpw()
 */
{
        struct  passwd *getpwuid(), *pw_ptr;
        static  char numstr[10];

        if ( ( pw_ptr = getpwuid( uid ) ) == NULL ){
                sprintf(numstr,"%d", uid);
                return numstr;
        }
        else
                return pw_ptr->pw_name ;
}