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getcom.c revision 1.11 
      1 /*	$NetBSD: getcom.c,v 1.11 2003/08/07 09:37:02 agc 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 1.11 2003/08/07 09:37:02 agc Exp $");
     38 #endif
     39 #endif				/* not lint */
     40 
     41 #include "extern.h"
     42 
     43 char   *
     44 getcom(buf, size, prompt, error)
     45 	char   *buf;
     46 	int     size;
     47 	const char   *prompt, *error;
     48 {
     49 	for (;;) {
     50 		fputs(prompt, stdout);
     51 		if (fgets(buf, size, stdin) == 0) {
     52 			if (feof(stdin))
     53 				die();
     54 			clearerr(stdin);
     55 			continue;
     56 		}
     57 		while (isspace(*buf))
     58 			buf++;
     59 		if (*buf)
     60 			break;
     61 		if (error)
     62 			puts(error);
     63 	}
     64 	/* If we didn't get to the end of the line, don't read it in next time. */
     65 	if (buf[strlen(buf) - 1] != '\n') {
     66 		int i;
     67 		while ((i = getchar()) != '\n' && i != EOF)
     68 			continue;
     69 	}
     70 	return (buf);
     71 }
     72 
     73 
     74 /*
     75  * shifts to UPPERCASE if flag > 0, lowercase if flag < 0,
     76  * and leaves it unchanged if flag = 0
     77  */
     78 char   *
     79 getword(buf1, buf2, flag)
     80 	char   *buf1, *buf2;
     81 	int     flag;
     82 {
     83 	int cnt;
     84 
     85 	cnt = 1;
     86 	while (isspace(*buf1))
     87 		buf1++;
     88 	if (*buf1 != ',') {
     89 		if (!*buf1) {
     90 			*buf2 = 0;
     91 			return (0);
     92 		}
     93 		while (cnt < WORDLEN && *buf1 && !isspace(*buf1) && *buf1 != ',')
     94 			if (flag < 0) {
     95 				if (isupper(*buf1)) {
     96 					*buf2++ = tolower(*buf1++);
     97 					cnt++;
     98 				} else {
     99 					*buf2++ = *buf1++;
    100 					cnt++;
    101 				}
    102 			} else if (flag > 0) {
    103 				if (islower(*buf1)) {
    104 					*buf2++ = toupper(*buf1++);
    105 					cnt++;
    106 				} else {
    107 					*buf2++ = *buf1++;
    108 					cnt++;
    109 				}
    110 			} else {
    111 				*buf2++ = *buf1++;
    112 				cnt++;
    113 			}
    114 		if (cnt == WORDLEN)
    115 			while (*buf1 && !isspace(*buf1))
    116 				buf1++;
    117 	} else
    118 		*buf2++ = *buf1++;
    119 	*buf2 = '\0';
    120 	while (isspace(*buf1))
    121 		buf1++;
    122 	return (*buf1 ? buf1 : NULL);
    123 }
    124