166 lines
4.2 KiB
C
166 lines
4.2 KiB
C
/*
|
|
* Copyright 1989 - 1993, Julianne Frances Haugh
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. Neither the name of Julianne F. Haugh nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY JULIE HAUGH AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL JULIE HAUGH OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <config.h>
|
|
|
|
#include "rcsid.h"
|
|
RCSID("$Id: loginprompt.c,v 1.6 2000/08/26 18:27:17 marekm Exp $")
|
|
|
|
#include <stdio.h>
|
|
#include <signal.h>
|
|
#include <ctype.h>
|
|
#include "prototypes.h"
|
|
#include "defines.h"
|
|
#include "getdef.h"
|
|
|
|
static void
|
|
login_exit(int sig)
|
|
{
|
|
exit(1);
|
|
}
|
|
|
|
/*
|
|
* 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];
|
|
int envc;
|
|
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 (prompt) {
|
|
cp = getdef_str("ISSUE_FILE");
|
|
if (cp && (fp = fopen(cp, "r"))) {
|
|
while ((i = getc(fp)) != EOF)
|
|
putc(i, stdout);
|
|
|
|
fclose(fp);
|
|
}
|
|
gethostname(buf, sizeof buf);
|
|
printf(prompt, buf);
|
|
fflush(stdout);
|
|
}
|
|
|
|
/*
|
|
* Read the user's response. The trailing newline will be
|
|
* removed.
|
|
*/
|
|
|
|
memzero(buf, sizeof buf);
|
|
if (fgets(buf, sizeof buf, stdin) != buf)
|
|
exit(1);
|
|
|
|
cp = strchr(buf, '\n');
|
|
if (!cp)
|
|
exit(1);
|
|
*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 (*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 (*cp != '\0') { /* process new variables */
|
|
char *nvar;
|
|
int count = 1;
|
|
|
|
for (envc = 0; envc < MAX_ENV; envc++) {
|
|
nvar = strtok(envc ? (char *)0 : cp, " \t,");
|
|
if (!nvar)
|
|
break;
|
|
if (strchr(nvar, '=')) {
|
|
envp[envc] = nvar;
|
|
} else {
|
|
envp[envc] = xmalloc(strlen(nvar) + 32);
|
|
sprintf(envp[envc], "L%d=%s", count++, nvar);
|
|
}
|
|
}
|
|
set_env(envc, envp);
|
|
}
|
|
|
|
/*
|
|
* Set the SIGQUIT handler back to its original value
|
|
*/
|
|
|
|
signal(SIGQUIT, sigquit);
|
|
#ifdef SIGTSTP
|
|
signal(SIGTSTP, sigtstp);
|
|
#endif
|
|
}
|