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/*
* Copyright (c) 1990 , Julianne Frances Haugh
* Copyright (c) 1996 - 1997, Marek Michałkiewicz
* Copyright (c) 2003 - 2005, Tomasz Kłoczko
* Copyright (c) 2007 , Nicolas François
* 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. The name of the copyright holders or contributors may not be used to
* endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 THE COPYRIGHT
* HOLDERS 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>
#ident "$Id$"
#include <ctype.h>
#include <string.h>
#include <stdio.h>
#include "prototypes.h"
/*
* valid_field - insure that a field contains all legal characters
*
* The supplied field is scanned for non-printable and other illegal
* characters.
* + -1 is returned if an illegal character is present.
* + 1 is returned if no illegal characters are present, but the field
* contains a non-printable character.
* + 0 is returned otherwise.
*/
int valid_field (const char *field, const char *illegal)
{
const char *cp;
int err = 0;
if (NULL == field) {
return -1;
}
/* For each character of field, search if it appears in the list
* of illegal characters. */
for (cp = field; '\0' != *cp; cp++) {
if (strchr (illegal, *cp) != NULL) {
err = -1;
break;
}
}
if (0 == err) {
/* Search if there are some non-printable characters */
for (cp = field; '\0' != *cp; cp++) {
if (!isprint (*cp)) {
err = 1;
break;
}
}
}
return err;
}
/*
* change_field - change a single field if a new value is given.
*
* prompt the user with the name of the field being changed and the
* current value.
*/
void change_field (char *buf, size_t maxsize, const char *prompt)
{
char newf[200];
char *cp;
if (maxsize > sizeof (newf)) {
maxsize = sizeof (newf);
}
printf ("\t%s [%s]: ", prompt, buf);
(void) fflush (stdout);
if (fgets (newf, (int) maxsize, stdin) != newf) {
return;
}
cp = strchr (newf, '\n');
if (NULL == cp) {
return;
}
*cp = '\0';
if ('\0' != newf[0]) {
/*
* Remove leading and trailing whitespace. This also
* makes it possible to change the field to empty, by
* entering a space. --marekm
*/
while (--cp >= newf && isspace (*cp));
cp++;
*cp = '\0';
cp = newf;
while (('\0' != *cp) && isspace (*cp)) {
cp++;
}
strncpy (buf, cp, maxsize - 1);
buf[maxsize - 1] = '\0';
}
}
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