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73 lines
1.8 KiB
C
73 lines
1.8 KiB
C
/* Example of Parsing Arguments with getopt.
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Copyright (C) 1991-2020 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, see <https://www.gnu.org/licenses/>.
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*/
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/*@group*/
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#include <ctype.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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int
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main (int argc, char **argv)
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{
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int aflag = 0;
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int bflag = 0;
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char *cvalue = NULL;
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int index;
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int c;
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opterr = 0;
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/*@end group*/
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/*@group*/
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while ((c = getopt (argc, argv, "abc:")) != -1)
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switch (c)
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{
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case 'a':
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aflag = 1;
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break;
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case 'b':
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bflag = 1;
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break;
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case 'c':
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cvalue = optarg;
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break;
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case '?':
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if (optopt == 'c')
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fprintf (stderr, "Option -%c requires an argument.\n", optopt);
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else if (isprint (optopt))
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fprintf (stderr, "Unknown option `-%c'.\n", optopt);
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else
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fprintf (stderr,
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"Unknown option character `\\x%x'.\n",
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optopt);
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return 1;
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default:
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abort ();
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}
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/*@end group*/
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/*@group*/
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printf ("aflag = %d, bflag = %d, cvalue = %s\n",
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aflag, bflag, cvalue);
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for (index = optind; index < argc; index++)
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printf ("Non-option argument %s\n", argv[index]);
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return 0;
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}
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/*@end group*/
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