156 lines
3.2 KiB
C
156 lines
3.2 KiB
C
/*
|
|
* SPDX-FileCopyrightText: 1989 - 1993, Julianne Frances Haugh
|
|
* SPDX-FileCopyrightText: 1996 - 2000, Marek Michałkiewicz
|
|
* SPDX-FileCopyrightText: 2003 - 2005, Tomasz Kłoczko
|
|
* SPDX-FileCopyrightText: 2008 - 2011, Nicolas François
|
|
*
|
|
* SPDX-License-Identifier: BSD-3-Clause
|
|
*/
|
|
|
|
#include <config.h>
|
|
|
|
#ident "$Id$"
|
|
|
|
#include <assert.h>
|
|
#include <stdio.h>
|
|
#include <signal.h>
|
|
#include <ctype.h>
|
|
#include "prototypes.h"
|
|
#include "defines.h"
|
|
#include "getdef.h"
|
|
|
|
static void login_exit (unused int sig)
|
|
{
|
|
exit (EXIT_FAILURE);
|
|
}
|
|
|
|
/*
|
|
* login_prompt - prompt the user for their login name
|
|
*
|
|
* login_prompt() displays the standard login prompt. If ISSUE_FILE
|
|
* is set in login.defs, this file is displayed before the prompt.
|
|
*/
|
|
|
|
void login_prompt (const char *prompt, char *name, int namesize)
|
|
{
|
|
char buf[1024];
|
|
|
|
#define MAX_ENV 32
|
|
char *envp[MAX_ENV];
|
|
char *cp;
|
|
int i;
|
|
FILE *fp;
|
|
|
|
RETSIGTYPE (*sigquit) (int);
|
|
#ifdef SIGTSTP
|
|
RETSIGTYPE (*sigtstp) (int);
|
|
#endif
|
|
|
|
/*
|
|
* There is a small chance that a QUIT character will be part of
|
|
* some random noise during a prompt. Deal with this by exiting
|
|
* instead of core dumping. If SIGTSTP is defined, do the same
|
|
* thing for that signal.
|
|
*/
|
|
|
|
sigquit = signal (SIGQUIT, login_exit);
|
|
#ifdef SIGTSTP
|
|
sigtstp = signal (SIGTSTP, login_exit);
|
|
#endif
|
|
|
|
/*
|
|
* See if the user has configured the issue file to
|
|
* be displayed and display it before the prompt.
|
|
*/
|
|
|
|
if (NULL != prompt) {
|
|
const char *fname = getdef_str ("ISSUE_FILE");
|
|
if (NULL != fname) {
|
|
fp = fopen (fname, "r");
|
|
if (NULL != fp) {
|
|
while ((i = getc (fp)) != EOF) {
|
|
(void) putc (i, stdout);
|
|
}
|
|
|
|
(void) fclose (fp);
|
|
}
|
|
}
|
|
(void) gethostname (buf, sizeof buf);
|
|
printf (prompt, buf);
|
|
(void) fflush (stdout);
|
|
}
|
|
|
|
/*
|
|
* Read the user's response. The trailing newline will be
|
|
* removed.
|
|
*/
|
|
|
|
memzero (buf, sizeof buf);
|
|
if (fgets (buf, (int) sizeof buf, stdin) != buf) {
|
|
exit (EXIT_FAILURE);
|
|
}
|
|
|
|
cp = strchr (buf, '\n');
|
|
if (NULL == cp) {
|
|
exit (EXIT_FAILURE);
|
|
}
|
|
*cp = '\0'; /* remove \n [ must be there ] */
|
|
|
|
/*
|
|
* Skip leading whitespace. This makes " username" work right.
|
|
* Then copy the rest (up to the end or the first "non-graphic"
|
|
* character into the username.
|
|
*/
|
|
|
|
for (cp = buf; *cp == ' ' || *cp == '\t'; cp++);
|
|
|
|
for (i = 0; i < namesize - 1 && isgraph (*cp); name[i++] = *cp++);
|
|
while (isgraph (*cp)) {
|
|
cp++;
|
|
}
|
|
|
|
if ('\0' != *cp) {
|
|
cp++;
|
|
}
|
|
|
|
name[i] = '\0';
|
|
|
|
/*
|
|
* This is a disaster, at best. The user may have entered extra
|
|
* environmental variables at the prompt. There are several ways
|
|
* to do this, and I just take the easy way out.
|
|
*/
|
|
|
|
if ('\0' != *cp) { /* process new variables */
|
|
char *nvar;
|
|
int count = 1;
|
|
int envc;
|
|
|
|
for (envc = 0; envc < MAX_ENV; envc++) {
|
|
nvar = strtok ((0 != envc) ? (char *) 0 : cp, " \t,");
|
|
if (NULL == nvar) {
|
|
break;
|
|
}
|
|
if (strchr (nvar, '=') != NULL) {
|
|
envp[envc] = nvar;
|
|
} else {
|
|
size_t len = strlen (nvar) + 32;
|
|
envp[envc] = xmalloc (len);
|
|
(void) snprintf (envp[envc], len,
|
|
"L%d=%s", count++, nvar);
|
|
}
|
|
}
|
|
set_env (envc, envp);
|
|
}
|
|
|
|
/*
|
|
* Set the SIGQUIT handler back to its original value
|
|
*/
|
|
|
|
(void) signal (SIGQUIT, sigquit);
|
|
#ifdef SIGTSTP
|
|
(void) signal (SIGTSTP, sigtstp);
|
|
#endif
|
|
}
|
|
|