text: /*
   * This file and its contents are supplied under the terms of the
   * Common Development and Distribution License ("CDDL"), version 1.0.
   * You may only use this file in accordance with the terms of version
   * 1.0 of the CDDL.
   *
   * A full copy of the text of the CDDL should have accompanied this
   * source.  A copy of the CDDL is also available via the Internet at
   * http://www.illumos.org/license/CDDL.
   */
  
  /*
   * Copyright 2019 Robert Mustacchi
   */
  
  #include <unistd.h>
  #include <err.h>
  #include <sys/types.h>
  #include <unistd.h>
  #include <stdlib.h>
  #include <pwd.h>
  #include <libgen.h>
  #include <locale.h>
  #include <libintl.h>
  
  int
  main(int argc, char *argv[])
  {
  	char *name;
  	char uidbuf[32];
  
  	(void) setlocale(LC_ALL, "");
  #if !defined(TEXT_DOMAIN)
  #define	TEXT_DOMAIN "SYS_TEST"
  #endif
  	(void) textdomain(TEXT_DOMAIN);
  
  	if (argc != 1) {
  		warnx(gettext("illegal arguments"));
  		(void) fprintf(stderr, gettext("Usage: %s\n"),
  		    basename(argv[0]));
  		return (1);
  	}
  
  	/*
  	 * In some cases getlogin() can fail. The most common case is due to
  	 * something like using script(1). Deal with that by falling back to the
  	 * current user ID, which is as accurate as we can be. This is what the
  	 * ksh93 version used to do.
  	 */
  	name = getlogin();
  	if (name == NULL) {
  		uid_t uid;
  		struct passwd *pass;
  
  		uid = getuid();
  		pass = getpwuid(uid);
  		if (pass != NULL) {
  			name = pass->pw_name;
  		} else {
  			(void) snprintf(uidbuf, sizeof (uidbuf), "%u", uid);
  			name = uidbuf;
  		}
  	}
  
  	if (printf("%s\n", name) == -1) {
  		err(EXIT_FAILURE, gettext("failed to write out login name"));
  	}
  
  	return (0);
  }
  