/********************************************************************** * Copyright (c) Digital Equipment Corporation 1984, 1985, 1986. * * All Rights Reserved. * * Reference "/usr/src/COPYRIGHT" for applicable restrictions. * **********************************************************************/ /* SCCSID: @(#)cuserid.c 3.0 4/22/86 */ /* (System 5) 1.3 */ /* 3.0 SID # 1.2 */ /*LINTLIBRARY*/ #include <stdio.h> #include <pwd.h> extern char *strcpy(), *getlogin(); extern int getuid(); extern struct passwd *getpwuid(); static char res[L_cuserid]; char * cuserid(s) char *s; { register struct passwd *pw; register char *p; if (s == NULL) s = res; p = getlogin(); if (p != NULL) return (strcpy(s, p)); pw = getpwuid(getuid()); endpwent(); if (pw != NULL) return (strcpy(s, pw->pw_name)); *s = '\0'; return (NULL); }