109 lines
2.2 KiB
C
109 lines
2.2 KiB
C
/*
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* SPDX-FileCopyrightText: 1989 - 1993, Julianne Frances Haugh
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* SPDX-FileCopyrightText: 1996 - 2000, Marek Michałkiewicz
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* SPDX-FileCopyrightText: 2003 - 2005, Tomasz Kłoczko
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* SPDX-FileCopyrightText: 2008 - 2011, Nicolas François
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <config.h>
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#ident "$Id$"
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#include <assert.h>
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#include <stdio.h>
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#include <signal.h>
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#include "attr.h"
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#include "defines.h"
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#include "getdef.h"
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#include "prototypes.h"
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#include "string/memset/memzero.h"
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#include "string/strchr/stpspn.h"
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#include "string/strcpy/strtcpy.h"
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#include "string/strtok/stpsep.h"
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static void login_exit (MAYBE_UNUSED int sig)
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{
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_exit (EXIT_FAILURE);
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}
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/*
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* login_prompt - prompt the user for their login name
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*
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* login_prompt() displays the standard login prompt. If ISSUE_FILE
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* is set in login.defs, this file is displayed before the prompt.
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*/
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void
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login_prompt(char *name, int namesize)
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{
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char buf[1024];
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char *cp;
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int i;
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FILE *fp;
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const char *fname = getdef_str ("ISSUE_FILE");
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sighandler_t sigquit;
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sighandler_t sigtstp;
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/*
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* There is a small chance that a QUIT character will be part of
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* some random noise during a prompt. Deal with this by exiting
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* instead of core dumping. Do the same thing for SIGTSTP.
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*/
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sigquit = signal (SIGQUIT, login_exit);
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sigtstp = signal (SIGTSTP, login_exit);
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/*
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* See if the user has configured the issue file to
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* be displayed and display it before the prompt.
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*/
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if (NULL != fname) {
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fp = fopen (fname, "r");
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if (NULL != fp) {
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while ((i = getc (fp)) != EOF) {
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(void) putc (i, stdout);
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}
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(void) fclose (fp);
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}
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}
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(void) gethostname (buf, sizeof buf);
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printf (_("\n%s login: "), buf);
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(void) fflush (stdout);
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/*
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* Read the user's response. The trailing newline will be
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* removed.
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*/
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MEMZERO(buf);
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if (fgets (buf, sizeof buf, stdin) != buf) {
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exit (EXIT_FAILURE);
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}
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if (stpsep(buf, "\n") == NULL)
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exit(EXIT_FAILURE);
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/*
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* Skip leading whitespace. This makes " username" work right.
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* Then copy the rest (up to the end) into the username.
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*/
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cp = stpspn(buf, " \t");
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strtcpy(name, cp, namesize);
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/*
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* Set the SIGQUIT handler back to its original value
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*/
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(void) signal (SIGQUIT, sigquit);
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(void) signal (SIGTSTP, sigtstp);
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}
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