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getcom.c revision 1.10 
      1 /*	$NetBSD: getcom.c,v 1.10 2000/09/24 15:51:40 jsm 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. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *	This product includes software developed by the University of
     18  *	California, Berkeley and its contributors.
     19  * 4. Neither the name of the University nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  */
     35 
     36 #include <sys/cdefs.h>
     37 #ifndef lint
     38 #if 0
     39 static char sccsid[] = "@(#)getcom.c	8.1 (Berkeley) 5/31/93";
     40 #else
     41 __RCSID("$NetBSD: getcom.c,v 1.10 2000/09/24 15:51:40 jsm Exp $");
     42 #endif
     43 #endif				/* not lint */
     44 
     45 #include "extern.h"
     46 
     47 char   *
     48 getcom(buf, size, prompt, error)
     49 	char   *buf;
     50 	int     size;
     51 	const char   *prompt, *error;
     52 {
     53 	for (;;) {
     54 		fputs(prompt, stdout);
     55 		if (fgets(buf, size, stdin) == 0) {
     56 			if (feof(stdin))
     57 				die();
     58 			clearerr(stdin);
     59 			continue;
     60 		}
     61 		while (isspace(*buf))
     62 			buf++;
     63 		if (*buf)
     64 			break;
     65 		if (error)
     66 			puts(error);
     67 	}
     68 	/* If we didn't get to the end of the line, don't read it in next time. */
     69 	if (buf[strlen(buf) - 1] != '\n') {
     70 		int i;
     71 		while ((i = getchar()) != '\n' && i != EOF)
     72 			continue;
     73 	}
     74 	return (buf);
     75 }
     76 
     77 
     78 /*
     79  * shifts to UPPERCASE if flag > 0, lowercase if flag < 0,
     80  * and leaves it unchanged if flag = 0
     81  */
     82 char   *
     83 getword(buf1, buf2, flag)
     84 	char   *buf1, *buf2;
     85 	int     flag;
     86 {
     87 	int cnt;
     88 
     89 	cnt = 1;
     90 	while (isspace(*buf1))
     91 		buf1++;
     92 	if (*buf1 != ',') {
     93 		if (!*buf1) {
     94 			*buf2 = 0;
     95 			return (0);
     96 		}
     97 		while (cnt < WORDLEN && *buf1 && !isspace(*buf1) && *buf1 != ',')
     98 			if (flag < 0) {
     99 				if (isupper(*buf1)) {
    100 					*buf2++ = tolower(*buf1++);
    101 					cnt++;
    102 				} else {
    103 					*buf2++ = *buf1++;
    104 					cnt++;
    105 				}
    106 			} else if (flag > 0) {
    107 				if (islower(*buf1)) {
    108 					*buf2++ = toupper(*buf1++);
    109 					cnt++;
    110 				} else {
    111 					*buf2++ = *buf1++;
    112 					cnt++;
    113 				}
    114 			} else {
    115 				*buf2++ = *buf1++;
    116 				cnt++;
    117 			}
    118 		if (cnt == WORDLEN)
    119 			while (*buf1 && !isspace(*buf1))
    120 				buf1++;
    121 	} else
    122 		*buf2++ = *buf1++;
    123 	*buf2 = '\0';
    124 	while (isspace(*buf1))
    125 		buf1++;
    126 	return (*buf1 ? buf1 : NULL);
    127 }
    128