1 /* xcase - change uppercase characters to lowercase or vice versa. */
3 /* Copyright (C) 2008,2009 Free Software Foundation, Inc.
5 This file is part of GNU Bash.
7 Bash is free software: you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation, either version 3 of the License, or
10 (at your option) any later version.
12 Bash is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with Bash. If not, see <http://www.gnu.org/licenses/>.
52 while ((c = getopt(ac, av, "lnu")) != EOF) {
55 setbuf (stdout, (char *)NULL);
64 fprintf(stderr, "casemod: usage: casemod [-lnu] [file]\n");
71 if (av[0] && (av[0][0] != '-' || av[0][1])) {
72 inf = fopen(av[0], "r");
74 fprintf(stderr, "casemod: %s: cannot open: %s\n", av[0], strerror(errno));
80 while ((c = getc(inf)) != EOF) {
83 x = islower(c) ? toupper(c) : c;
86 x = isupper(c) ? tolower(c) : c;