libadm/common/ckstr.c

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*  Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/*    All Rights Reserved   */


/*
 * Copyright (c) 1989, 2011, Oracle and/or its affiliates. All rights reserved.
 */

#include <stdio.h>
#include <string.h>
#include <limits.h>
#include <sys/types.h>
#include "libadm.h"

/*
 * This file is the only one anywhere to need these functions,
 * so we declare them here, not in libadm.h
 */
extern char *__compile(char *, char *, const char *, int);
extern int __step(const char *, const char *);

#define ESIZE   1024

#define ERRMSG0 "Input is required."
#define ERRMSG1 "Please enter a string containing no more than %d characters."
#define ERRMSG2 \
    "Pattern matching has failed."
#define ERRMSG3 \
    "Please enter a string which contains no imbedded, \
    leading or trailing spaces or tabs."

#define HLPMSG0 "Please enter a string"
#define HLPMSG1 "Please enter a string containing no more than %d characters"
#define HLPMSG2 "matches one of the following patterns:"
#define HLPMSG3 "matches the following pattern:"
#define HLPMSG4 "contains no imbedded, leading or trailing spaces or tabs."

static const char   *errstr;

static char *
sethlp(char *msg, char *regexp[], int length)
{
    int i;

    if (length)
        (void) sprintf(msg, HLPMSG1, length);
    else
        (void) strcpy(msg, HLPMSG0);

    (void) strcat(msg, length ? " and " : " which ");

    if (regexp && regexp[0]) {
        (void) strcat(msg, regexp[1] ? HLPMSG2 : HLPMSG3);
        for (i = 0; regexp[i]; i++) {
            (void) strcat(msg, "\\n\\t");
            (void) strcat(msg, regexp[i]);
        }
    } else
        (void) strcat(msg, HLPMSG4);
    return (msg);
}

int
ckstr_val(char *regexp[], int length, char *input)
{
    char    expbuf[ESIZE];
    int i, valid;

    valid = 1;
    if (length && (strlen(input) > (size_t)length)) {
        errstr = ERRMSG1;
        return (1);
    }
    if (regexp && regexp[0]) {
        valid = 0;
        for (i = 0; !valid && regexp[i]; ++i) {
            if (!__compile(regexp[i], expbuf, &expbuf[ESIZE], '\0'))
                return (2);
            valid = __step(input, expbuf);
        }
        if (!valid)
            errstr = ERRMSG2;
    } else if (strpbrk(input, " \t")) {
        errstr = ERRMSG3;
        valid = 0;
    }
    return (valid == 0);
}

void
ckstr_err(char *regexp[], int length, char *error, char *input)
{
    char    *defhlp;
    char    temp[1024];

    if (input) {
        if (ckstr_val(regexp, length, input)) {
            (void) sprintf(temp, errstr, length);
            puterror(stdout, temp, error);
            return;
        }
    }

    defhlp = sethlp(temp, regexp, length);
    puterror(stdout, defhlp, error);
}

void
ckstr_hlp(char *regexp[], int length, char *help)
{
    char    *defhlp;
    char    hlpbuf[1024];

    defhlp = sethlp(hlpbuf, regexp, length);
    puthelp(stdout, defhlp, help);
}

int
ckstr(char *strval, char *regexp[], int length, char *defstr, char *error,
    char *help, char *prompt)
{
    int n;
    char    *defhlp;
    char    input[MAX_INPUT];
    char    hlpbuf[1024];
    char    errbuf[1024];

    defhlp = NULL;
    if (!prompt)
        prompt = "Enter an appropriate value";

start:
    putprmpt(stderr, prompt, NULL, defstr);
    if (getinput(input))
        return (1);

    n = (int)strlen(input);
    if (n == 0) {
        if (defstr) {
            (void) strcpy(strval, defstr);
            return (0);
        }
        puterror(stderr, ERRMSG0, error);
        goto start;
    }
    if (strcmp(input, "?") == 0) {
        if (defhlp == NULL)
            defhlp = sethlp(hlpbuf, regexp, length);
        puthelp(stderr, defhlp, help);
        goto start;
    }
    if (ckquit && (strcmp(input, "q") == 0)) {
        (void) strcpy(strval, input);
        return (3);
    }
    if (ckstr_val(regexp, length, input)) {
        (void) sprintf(errbuf, errstr, length);
        puterror(stderr, errbuf, error);
        goto start;
    }
    (void) strcpy(strval, input);
    return (0);
}