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/*
* 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);
}
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