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      1 /*	$NetBSD: getcom.c,v 1.15 2021/05/02 12:50:43 rillig Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1983, 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. Neither the name of the University nor the names of its contributors
     16  *    may be used to endorse or promote products derived from this software
     17  *    without specific prior written permission.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     29  * SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 #ifndef lint
     34 #if 0
     35 static char sccsid[] = "@(#)getcom.c	8.1 (Berkeley) 5/31/93";
     36 #else
     37 __RCSID("$NetBSD: getcom.c,v 1.15 2021/05/02 12:50:43 rillig Exp $");
     38 #endif
     39 #endif				/* not lint */
     40 
     41 #include "extern.h"
     42 
     43 char *
     44 getcom(char *buf, int size, const char *prompt, const char *error)
     45 {
     46 	for (;;) {
     47 		fputs(prompt, stdout);
     48 		if (fgets(buf, size, stdin) == NULL) {
     49 			if (feof(stdin))
     50 				die();
     51 			clearerr(stdin);
     52 			continue;
     53 		}
     54 		while (isspace((unsigned char)*buf))
     55 			buf++;
     56 		if (*buf)
     57 			break;
     58 		if (error)
     59 			puts(error);
     60 	}
     61 	/* If we didn't get to the end of line, don't read it in next time. */
     62 	if (buf[strlen(buf) - 1] != '\n') {
     63 		int i;
     64 		while ((i = getchar()) != '\n' && i != EOF)
     65 			continue;
     66 	}
     67 	return (buf);
     68 }
     69 
     70 
     71 /*
     72  * shifts to UPPERCASE if flag > 0, lowercase if flag < 0,
     73  * and leaves it unchanged if flag = 0
     74  */
     75 char   *
     76 getword(char *buf1, char *buf2, int flag)
     77 {
     78 	int cnt;
     79 
     80 	cnt = 1;
     81 	while (isspace((unsigned char)*buf1))
     82 		buf1++;
     83 	if (*buf1 != ',') {
     84 		if (!*buf1) {
     85 			*buf2 = 0;
     86 			return (0);
     87 		}
     88 		while (cnt < WORDLEN && *buf1 &&
     89 		    !isspace((unsigned char)*buf1) && *buf1 != ',')
     90 			if (flag < 0) {
     91 				if (isupper((unsigned char)*buf1)) {
     92 					*buf2++ =
     93 					    tolower((unsigned char)*buf1++);
     94 					cnt++;
     95 				} else {
     96 					*buf2++ = *buf1++;
     97 					cnt++;
     98 				}
     99 			} else if (flag > 0) {
    100 				if (islower((unsigned char)*buf1)) {
    101 					*buf2++ =
    102 					    toupper((unsigned char)*buf1++);
    103 					cnt++;
    104 				} else {
    105 					*buf2++ = *buf1++;
    106 					cnt++;
    107 				}
    108 			} else {
    109 				*buf2++ = *buf1++;
    110 				cnt++;
    111 			}
    112 		if (cnt == WORDLEN)
    113 			while (*buf1 && !isspace((unsigned char)*buf1))
    114 				buf1++;
    115 	} else
    116 		*buf2++ = *buf1++;
    117 	*buf2 = '\0';
    118 	while (isspace((unsigned char)*buf1))
    119 		buf1++;
    120 	return (*buf1 ? buf1 : NULL);
    121 }
    122